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FX3U-4LC USER`S MANUAL

1. Caution When using a thermocouple use specified compensating lead wires 5 2 2 Wiring example of resistance thermometer For resistance thermometers applicable to the 4L C refer to the following Refer to the Section 2 4 When used the Pt100 3 wire or Pt1000 3 wire FX3U 4LC 24V DC Grounding Ground resistance 100Q or less Pt100 or Pt1000 Caution When you use a resistance temperature sensor the resistance of the leadwire is low use a wire without a resistance difference between the leadwire 29 UOnOnpoJjU uoneogoeds INQ wasis QJ uoneJn6ijuo uonejejsu x 6 suoroun J jo uononpoau wey N welbog QO AouejJeyng OO sojdwex 3 Bunoouseqnou CO 5 Wiring FX3U 4LC User s Manual 5 2 Input Wiring When used the Pt1000 2 wire FX3U 4LC 24V DC Grounding Ground resistance 100Q or less Pt1000 Caution e When you use a resistance temperature sensor the resistance of the leadwire is low use a wire without a resistance difference between the leadwire e Make sure to short circuit the PTB and PTB terminals when 2 wire of a resistance thermometer sensor is input 5 2 3 Wiring example of micro voltage input For the input range of micro voltage inputs applicable to the 4LC refer to the following Refer to the Section 2 5 FX3U 4LC
2. 47 Set value SV 4 D Time PID constants are set PID constants are set ST starts ST starts When control is started When the set value is changed Explanation of operation It is assumed that all conditions for performing startup tuning are satisfied For the conditions for performing startup tuning refer to Subsection 6 9 2 1 Startup tuning is started when control is started Optimal PID constants are obtained automatically based on the response characteristics of the control target and each constant is stored in the corresponding buffer memory 2 Startup tuning is started when the set value is changed Optimal PID constants are obtained automatically based on the response characteristics of the control target and each constant is stored in the corresponding buffer memory 6 Introduction of Functions FX3U ALC User s Manual 6 9 Startup Tuning Function Point a Before using the startup tuning function confirm that all conditions for performing startup tuning and for B aborting startup tuning refer to Subsection 6 9 2 are satisfied Before starting startup tuning set the output limiter upper limit to 100 set the output limiter lower limit to 0 and set the output change ratio limiter function to OFF so that optimal PID constants can be 2 calculated by startup tuning m e When startup tuning is finished normally PID constants are written to the buffer memories and then the 8 ST e
3. 87 8 2 21 BFM 57 BFM 97 BFM 137 BFM 177 Operation mode eeseeeeeeeessese 88 8 2 22 BFM 58 BFM 98 BFM 1 38 BFM 1 78 Proportional band P Heating proportional band P ssssssssssssesseeseseeennnnnn nennen nnne nnn nennen ns 89 8 2 23 BFM 59 BFM 99 BFM 1 39 BFM 1 79 Cooling proportional band P 89 8 2 24 BFM 60 BFM 100 BFM 140 BFM 180 Integral time I eeesseeeesseess 90 8 2 25 BFM 61 BFM 101 BFM 141 BFM 181 Derivative time D esses 90 8 2 26 BFM 62 BFM 102 BFM 142 BFM 1 82 Control response parameter 91 8 2 27 BFM 63 BFM 103 BFM 143 BFM 183 Overlap Dead band 92 8 2 28 BFM 64 BFM 104 BFM 144 BFM 1 84 Output limiter upper limit Heating upper output limiter lsseesseeesseseseeenneennnennnnnnnnnnn nmn 93 8 2 29 BFM 65 BFM 105 BFM 145 BFM 1 85 Output limiter lower limit 94 8 2 30 BFM 66 BFM 106 BFM 146 BFM 1 86 Cooling upper output limiter setting 94 8 2 31 BFM 67 BFM 107 BFM 147 BFM 187 Output change ratio limiter 95 8 2 32 BFM 68 BFM 108 BFM 148 BFM 1 88 Sensor correction value setting 96 8 2 33 BFM 6
4. sesseeeseeseeeen nen 82 6 2 6 BFM 29 16 28 External anp t Value 3 eio Ee he eter oe odo t so a uci tdeo ede 82 8 2 9 BFM 29 Control start stop changeover sssssssssessssesseseeene eene nennen nnne nnne nins 82 8 2 10 BFMF30 FX Series model Code iz ii eed roe redo siones on Duce deca ee axe I E VOR ENRNEEYG 82 8 2 11 BFM 32 to 35 External output value Heating external output value monitor 83 8 2 12 BFM 36 to 39 Cooling external output value monitor cece eecccceeeecceeeeeeaeeeesaeeessaeeesaaeees 83 8 2 13 BFM 40 to 43 Set value monitor seeeesseeessseessseeeeenennnnn enne nnns 83 8 2 14 BFM 44 to 47 Control mode monitor seeeeseseeseeeeeeeeeenenennn nnne 84 8 2 15 BFM 48 BFM 88 BFM 1 28 BFM 168 Set value SV eeeeeeeeeeeeeeeeeeeeeeeeee 85 8 2 16 BFM 49 to 52 BFM 89 to 92 BFM 129 to 132 BFM 169 to 172 Alarim setindg value 044 5 2 nsi min 2 C ede ean de a DP tae eee MA MES areata 85 8 2 17 BFM 53 BFM 93 BFM 1 33 BFM 1 73 Heater disconnection alarm set value 86 8 2 18 BFM 54 BFM 94 BFM 134 BFM 174 AUTO MANUAL mode changeover 86 8 2 19 BFM 55 BFM 95 BFM 1 35 BFM 1 75 MANUAL output set value 87 8 2 20 BFM 56 BFM 96 BFM 1 36 BFM 1 76 AT auto tuning execution command
5. 76 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details A 8 2 Buffer Memory Details S 8 2 1 BFM 0 Flag The ON OFF status of each bit indicates the status of the 4LC 2 cab Description ae Backup 3 0 Flag Refer to the following R 3 Flag bO Turns ON when an error among b1 to b10 below has occurred Turns ON when data outside set range is written b1 Set value range error The buffer memory number in which an error has been generated is stored in a set value range error address BFM 252 Turns ON when driving power supply 24V DC is not supplied The Ue r pe powersupply emor control output of all channels is turned OFF Turns ON when an error has been caused by noise or when a failure has occurred in the 4LC Turn the power ON again and check for changes in the state If no improvement is obtained consult a Mitsubishi Electric distributor b4 CHT ATIST abnormal endag amay hn CH1 AT auto tuning or ST startup tuning b5 CH2 ATIST abnormal endag anomaly m CH2 AT auto tuning or ST startup tuning b6 CHB ATIST anomal endag Sa ba CH3 AT auto tuning or ST startup tuning b7 CH4 ATIST abnormal era tag rona iba CH4 AT auto tuning or ST startup tuning Turns ON when an error has been caused by noise or when a failure has occurred in the 4LC The control output of all channels is wasis OO uoneinByuoy b3 Set value backup error flag uonejejsu x Buu
6. Example of operation DENM K1 or K2 Initialization command BFM 255 KO Initialization completed EN flag BFMZO b14 OFF lt ON for approx 250ms Explanation of operation 1 When K1 or K2 is written to BFM 255 Initialization command the set values are initialized 2 When initialization is completed BFM 255 becomes KO and the Initialization completed flag turns ON and remains ON for approximately 250ms For details on the flag refer to Subsection 8 2 1 Caution Do not write or read buffer memories while the Initialization completed flag is ON Initialization is disabled while control is being performed or while the set values are backed up 9 Program Examples FX3U 4LC User s Manual 9 Program Examples STARTUP AND MAINTENANCE PRECAUTIONS Q DANGER Make sure to connect the battery correctly Do not charge disassemble heat short circuit or expose the battery to fire Doing so may rupture or ignite it Do not touch any terminal while the PLC s power is on Doing so may cause electric shock or malfunctions Before modifying or disrupting the program in operation or running the PLC carefully read through this manual and the associated manuals and ensure the safety of the operation An operation error may damage the machinery or cause accidents STARTUP AND MAINTENANCE PRECAUTIONS N CAUTION Do not disassemble or modify the PLC Doing so may cause fire equipmen
7. For details on the conditions of operation refer to Subsection 9 3 2 For details on the device assignments refer to Subsection 9 3 3 M8002 MOV km vo 100 0 C set to DO as a set value Initial pulse M8000 RUN monitor A is Input type selection E TOR Ko K208 K1 K1 Type K 100 0 to 400 0 C Temperature control ready C aod itch SET M100 X000 RST M100 M100 M14 Operation mode Initialization initial value completed a tay M E tl T ill heh a Alarm 1 set value Lower limit deviation 30 0 C To next page To next page 138 9 Program Examples FX3U ALC User s Manual 9 3 Example of a Program for Heating Cooling PID Control From previous page From previous page M100 M14 ped TO ko K232 Ko K1 ood E Soul T Air cooling type initial value Initialization completed flag ae eae rise completion range CT monitor method K238 ON current OFF current initial value CT ratio setting RUN monitor BFM 0 MO to M15 Event CH1 FROM KO K5 D5 K1 Measured value BFM 5 CH1 gt D5 Heating control output value monitor BFM 9 D9 Cooling control output value monitor BFM 14 gt D14 Heater current measured value BFM 21 CH1 gt D21 Set value range error address M Seu uius BFM 252 D252 To next page To next page 139 1 o c c D 62 3 o o p E Q uoneJn6iuo suojoun J jo uononpoau UONnOnpoJjU uoneogoeds INQ wasis OO Buum O
8. e Caution T S e This buffer memory Set value backup command does not become 0 automatically after backup is 8 completed Write KO to this buffer memory after backup is completed 9 e f the power is turned OFF once and ON again when a set value backup error has occurred all data is mm reset to the initial value 38 The set values are not backed up when a set value range error has occurred 87 Bunoouseqnou CO 123 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 71 BFM 255 Initialization command 124 Initialize the set values using this buffer memory The initialization range varies depending on the set value Write K1 to initialize all buffer memories Write K2 to initialize buffer memories 48 to 207 232 and 242 to 247 in accordance with the input type in the case of internal input and control mode The setting is applied to all channels Buffer memories are not initialized when KO is written For details on the input type refer to Subsection 8 2 52 For details on the control mode switch refer to Subsection 8 2 62 Initial Description value Does not initialize buffer memories Initialize all buffer memories Initializes buffer memories BFM 48 to 207 232 and 242 to 247 in accordance with the input type in the case of internal input and control mode 1 These buffer memories can be written only while control is stopped Backup
9. For details on the setting limiter lower limit refer to Subsection 8 2 41 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details A 8 2 53 BFM 209 to 212 BFM 215 to 218 BFM 221 to 224 BFM 227 to 230 2 Alarm mode setting 1 to 4 A The 4LC is equipped with 14 types of alarms Four types of alarms alarm 1 to alarm 4 are available in each channel in accordance with the application Set the alarm type by writing the alarm mode 0 to 14 to the alarm mode setting buffer memories for alarms 1 2 to 4 each channel Y Values of alarms 1 to 4 can be set using the alarm set value buffer memories and the alarm status can be 8 checked in the status of alarm bits b4 to b7 for alarms 1 to 4 of the event buffer memory z For details on the alarm function refer to Chapter 7 For details on the event refer to Subsection 8 2 2 For details on the alarm setting value refer to Subsection 8 2 16 Eu Description pios Backup Alarm 1 mode setting 209 215 221 227 Setting range 0 to 14 Refer to the following 0 RW F Alarm 2 mode setting 210 216 222 228 Setting range 0 to 14 Refer to the following o0 RW Alarm 3 mode setting wasis OO uoneJn6ijuo X uonejejsu x 211 217 8223 229 Setting range 0 to 14 Refer to the following 0 RW F Alarm 4 mode setting 212 4218 224 230 Setting range 0 to 14 Refer to the
10. MO An error is present M24 CH1 Alarm1 10 Troubleshooting FX3U 4LC User s Manual 10 Troubleshooting When a fault occurs check the power supply voltage the PLC main unit and the 4LC for loose terminal screws and examine the connectors for a defective contact STARTUP AND MAINTENANCE PRECAUTIONS Q DANGER Make sure to connect the battery correctly Do not charge disassemble heat short circuit or expose the battery to fire Doing so may rupture or ignite it Do not touch any terminal while the PLC s power is on Doing so may cause electric shock or malfunctions Before modifying or disrupting the program in operation or running the PLC carefully read through this manual and the associated manuals and ensure the safety of the operation An operation error may damage the machinery or cause accidents STARTUP AND MAINTENANCE PRECAUTIONS N CAUTION Do not disassemble or modify the PLC Doing so may cause fire equipment failures or malfunctions For repair contact your local Mitsubishi Electric distributor Turn off the power to the PLC before attaching or detaching the following devices Failure to do so may cause device failures or malfunctions Peripheral devices display modules expansion boards and special adapters O extension units blocks FX Series terminal block and the special function units blocks Battery and memory cassette 141 A uononpoJu uoneogoeds INQ w
11. ccccceccccceececceeececeeececeseeceeeceseeeeeseueeesseeeessueeeseeeeeseeeeees 124 9 Program Examples 125 9 1 Reading Writing Buffer Memory 5 oes ctae cetus based e hte Rete p oo nove kb eu vua ema e pieni t e rho ue i ndrae lane 126 9 1 1 Assigned unit INCI OOM aussi apo tuba RE EU Rav deax us tuin vane agat Carat ea a Vat Dea Eco V Rada dtuesbdeddwuautoesy statues 126 9 1 2 How to read write from to buffer memory sssssssssssssseseeeenen nennen nnne 126 9 2 Example of a Program for PID Gontrol 2 n eb ho soc eee a eee 131 9 2 T 25ystemcoblidilrellOD sos ences bez need os cadens ente sean aiaeia dece edon Pee stude Sd sae fos dena d tht ead ae E 131 9 2 2 Conditions oOFODerdllOPesc ect cso ee radod emi cop ud D e ees Ls m ee M dc LE CL 131 92 3 BI eyes tT 132 92 4 SSeguerce DION seas te ett o vesddicccacedmu a uM Dun tUm i p p dRe M M LCD LL c EUN qui LIE 133 9 3 Example of a Program for Heating Cooling PID Control eeeeseeseeeeeeenreeeeere 136 Jk Oyster COnN urat ON 2524 hehe T T 136 O 9 2 AZONGIMONS ORODET dlOEI sdi r e a e T 136 9 3 9 Device AS SIG MING ALG ie iea a E LE tU Da cO ane agente dt 137 9 3 4 Sequence DEOGOFGETIS usmod ues nete a bae qae dea e Dua E ane pod audet eode eoa ane eda educat 138 10 Troubleshooting 141 10 1 Troubleshooting ProCedure cccccsccccsscecseseeceeeecceeecsaeeeceueessaueeceueesseeeesegeeesuseessaeeessnseeseaees 142 10
12. e After disconnecting cables other than the power cable turn the power ON again and check for changes in the state If no improvement is obtained consult a Mitsubishi Electric distributor One of the following causes may have occurred The power supply is OFF Incorrect external wiring Power of the specified voltage is not being supplied to the power supply terminal The power cable is broken e f the power is not OFF check the power supply and the power supply route If power is being supplied correctly consult a Mitsubishi Electric distributor After disconnecting cables other than the power cable turn the power ON again and check for changes in the state If no improvement is obtained consult a Mitsubishi Electric distributor 10 2 2 BATT BAT LED on off The table below describes details for the LED statuses Status PLC Status Error corrective action ON The battery voltage is low Immediately replace the battery The battery voltage is higher than the value OFF with D8006 iios 143 A uononpoJu uoneogoeds INQ wasis OO uoneJn6ijuo uonejejsu x Buum Ol o suonoun jo uononpoau wey N welbog QO Kioweyjseyng OO m gt lt amp 3 ze D o 10 Troubleshooting FX3U ALC User s Manual 10 2 Diagnostics on the PLC Main Unit 10 2 3 ERROR ERR LED on flashing off The table below describes details for the LED statuses Status PLC Status Error corrective
13. 3 welbag CO Kiowayy sayjng sojdwex Bunoouseqnou CO 93 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 29 BFM 65 BFM 105 BFM 145 BFM 185 Output limiter lower limit To these buffer memories set the output limiter lower limit for setting the lower limit of the control output value MV For an operation example of the output limiter lower limit refer to Subsection 8 2 28 For details on the output limiter upper limit heating upper output limiter refer to Subsection 8 2 28 Setting range e PID control 65 105 145 185 50 to Output limiter upper limit 1 5 0 to e Heating cooling PID control 0 Not used 1 These buffer memories can be written only while standard PID control is being performed Caution e Handling numbers containing decimal places The set value should be the actual value multiplied by 10 The setting of the output limiter lower limit is invalid while two position control is being performed he setting of the output limiter lower limit is invalid while heating cooling PID control is being performed Proper PID constants may not be obtained if the output limiter lower limit is set and auto tuning is performed Do not set the output limiter lower limit when performing auto tuning 8 2 30 BFM 66 BFM 106 BFM 146 BFM 186 Cooling upper output limiter setting To these buffer memories set the output limiter upper limit on the coolin
14. 8 2 17 BFM 53 BFM 93 BFM 133 BFM 173 Heater disconnection alarm set value To these buffer memories enter a value for recognizing heater disconnection or recognizing abnormal current while the output is OFF While the control output is ON When the heater current measured value is equivalent to or smaller than the heater disconnection alarm set value a heater disconnection alarm is issued b9 of the Event BFM for the relevant channel turns ON While the control output is OFF When the heater current measured value is equivalent to or larger than the heater disconnection alarm set value an abnormal current alarm in the output OFF status is issued b10 of the Event BFM for the relevant channel turns ON For details on the heater disconnection alarm refer to Section 6 11 For details on the heater current measured value refer to Subsection 8 2 7 Description Initial dee 133 173 Setting range 0 to 1000 0 0 to 100 0A o0 RW Caution Backup 53 e Handling numbers containing decimal places The set value should be the actual value multiplied by 10 As the heater disconnection alarm set value enter a value smaller than the actual heater current e When the control mode using external outputs is selected by the control mode switch function the heater disconnection alarm function is disabled e When 0 is entered the heater disconnection alarm function is disabled 8 2 18 BFM 5
15. 8 2 69 BFM 253 Error reset command 122 Reset errors using this buffer memory Write K1 to reset existing errors The contents of errors can be checked using flags The setting is applied to all channels For details on the flag refer to Subsection 8 2 1 For details on the set value range error address refer to Subsection 8 2 68 BEEN EE value 0 Performs nothing ES 1 Resets errors Backup CH1 253 Caution e Set K1 for 0 25 sec or more to execute the error reset command This buffer memory Error reset command does not become 0 automatically after errors are reset Write KO to this buffer memory after errors are reset 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 70 BFM 254 Set value backup command z Back up the set values using this buffer memory S Write K1 to write the set values of the backup target buffer memories to the EEPROM built into the 4LC The setting is applied to all channels The EEPROM stores initial values at shipment 2 The backup target buffer memories can be checked using the buffer memory list e For details on the buffer memory list refer to Section 8 1 8 adis Description as Backup 0 Normal 9694 1 Starts to write EEPROM wasis GO O Example of operation 3 1 2 3 s Set value backup SI S command BFM 254 D KO 4 Set value being backed up ON E flag BFM 0 b13 gt z OFF m O Set val
16. Initial Description Caution CH1 21 These buffer memories handle numeric values containing decimal places and store the actual value multiplied by 10 When the control mode using external outputs is selected by the control mode switch function the CT input is not measured In this case these buffer memories always store O e When heating cooling PID control using external outputs is used control the CT input is not measured In this case these buffer memories always store O For details on the control mode switch refer to Subsection 8 2 62 Backup 8 2 8 BFM 25 to 28 External input value When the control mode using external outputs is selected by the control mode switch function set a value corresponding to the measured value PV to these buffer memories For details on the control mode switch refer to Subsection 8 2 62 Description ena 26 27 28 Seting range S276 o eaae TTR Caution e When the setting in the external input value is greater than the external input range upper limit 5 it is judged as an input upper limit error and bit O of the event buffer memory BFM 1 to BFM 4 turns ON When the setting in the external input value is smaller than the external input range lower limit 596 it is judged as an input lower limit error and bit 1 of the event buffer memory BFM 1 to BFM 4 turns ON 8 2 9 BFM 29 Control start stop changeover This buffer memo
17. R W ae PID control limit PID PID control Output change ratio limiter change ratio limiter O to 1000 0 0 to 100 0 sec hap OC 187 a 5000 to 5000 Sensor correction value setting 50 00 to 50 00 of span o frw v e 8 Buffer Memory FX3U 4LC User s Manual 8 1 Buffer Memory List A NO Description set range iia Remarks d O 69 109 149 189 Adjustment sensitivity dead zone setting 1 to 100 0 1 to 10 0 of span 10 RW v C E PID control Control output cycle setting 70 110 150 190 Heating cooling Heating control output period 5 to 1000 0 5 to 100 0 sec R W v e 2 PID control setting 71 111 151 191 Heating cooling Cooling control output period S 5 to 1000 0 5 to 100 0 sec 300 R W ae Q PID control setting 2 72 112 152 192 Primary delay digital filter setting 0 to 100 sec 0 RW Ea o 73 fs Setting change ratio limiter sean ep UM EXSE o wr gra nes ioa AT uto rings mouon o RW a PID control Pio contol en e operation o Norma operation 1 RWI y Pio contol Secon Reverse operation 75 115 155 195 TETTE DERE eating cooling ues s QO uoneJn6ijuo 76 116 196 Setting limiter upper limit SoH imie ower ime 10 1300 R W A 4 Input range upper limit Bl 77 117 197 Setting limiter lower limit pur ange ow Celine 100 IRW v A a Setting limiter upper limit 1 D 78 118 158 198 Loop breaking ala
18. Shows the title of the chapter and the title Indexes the chapter number of the section The right side of each page indexes the chapter number for the page currently opened This area shows the manual title for the current This area shows the title of the chapter and the page title of the section for the current page ee f 3 2 Applicable PLC uononpogu sm Model name Applicability Ver 1 00 and later Up to 8 blocks can be extended Ver 2 20 and later Up to 8 blocks can be extended Ver 2 20 and later Up to 8 blocks can be extended FX3G Series PLC FX3U Series PLC uoneoyoeds IND FX3UC Series PLC The version number can be checked by reading the last three digits of device D8001 1 An FX2NC CNV IF or FX3uc 1PS 5V is necessary to connect the 4LC with the FX3uc PLC 2 Up to 7 units can be connected to the FX3uc 32MT LT 2 PLC uoneunByuo uejs s 3 3 Connection with PLC The 4LC connects with a PLC via an extension cable The 4LC is handled as a special extension block of the PLC The unit number of the 4LC is automatically assigned No 0 to No 7 Unit No 1 to No 7 is assigned when the main unit is an FX3UC 32MT LT 2 starting from the special function unit block closest to the PLC main unit This unit number is used for the designation of a FROM TO instruction For details on the assignment of the I O number and unit number of the PLC refer to the following manual corre
19. e e range PID control 0 Disable 1 Enable Heating cooling PID control 0 Not used 1 Oin the case of heating cooling PID control CH1 wasis QJ uoneJn6ijuo uonejejsu x 2 These buffer memories can be written only while standard PID control is being performed Example of operation 1 When SV tracking is provided Buum Ol Set value SV of slave channel Value stored in set value monitor buffer memory for slave channel o suonoun jo uononpoau Time Cascade control ON OFF changeover point 7 c 3 Example of operation 2 When SV tracking is not provided Set value SV of slave channel Value stored in set value monitor buffer memory for slave channel D D 3 O 3 Time 9 Cascade control xg ON OFF changeover point 32 3 Point This function prevents drastic change in the set value SV caused when the cascade control function is changed from ON to OFF 1 0 3 119 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 64 BFM 244 245 Cascade ON OFF Using these buffer memories turn ON or OFF cascade control Write KO to turn OFF cascade control Write K1 to turn ON cascade control When cascade control is changed over from OFF to ON the control output from the master channel is changed over without bump When cascade control is changed over from ON to OFF the resulted operation varies depending on
20. uei CO Kiowayy yng So duJex4 Bunoouseqnou CO 109 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 52 BFM 208 BFM 214 BFM 220 BFM 226 Input type 110 To these buffer memories set the input type i Description dios 214 220 226 Input type Refer to the following 1 These buffer memories can be written only while control is stopped 208 Input type Set Input Set Input ve Input range Unit e Input range Unit 100 0 to 800 0 0 1 C 31 W26Re oF 9 oF 33 Ser 300 0 to 700 0 0 1 F 11 eC 35 0101600 oF 1 1000104000 0 to 400 0 0 1 C 25 desi 0 to 3000 oF 2 ea to 1300 C 26 C 3 a to 800 oF 27 C Cem 0 to 2300 oF 4 to 2400 oF 28 C 5 a 0 to 200 0 0 1 C 29 01230 to 2300 oF 6 7 8 Oto 1000 to 1000 C 40 0 1 C oF 41 0 1 C 18 assez 0 to 200 0 0 1 C 42 0 1 F Pt1000 a 0 1 F a 22 3000007000 0 to 700 0 0 1 F 46 Micro mV voltage 23 m 0 to 700 0 0 1 F 47 input 0 to 100 mV Caution tis not possible to change the setting while control is being performed If the setting is changed while control is being performed the contents of setting are reflected when control is stopped e When changing the input type change the setting limiter values also so that the setting limiter values are within the input range For details on the setting limiter upper limit refer to Subsection 8 2 40
21. uz Handling numbers containing decimal places 3s The set value should be the actual value multiplied by ten ss The set value should be the actual value multiplied by 100 for the sensor correction value setting 2 buffer memories BFM 68 BFM 108 BFM 148 and BFM 188 and multiplied by 1000 for the cascade gain buffer memories BFM 246 and BFM 247 A Handling integers or numbers containing decimal places according to the input range setting of BFM 208 214 220 and 226 When handling numbers containing decimal places multiply the set value by ten 7 c 3 BFM No Initial Description set range Remarks 0 value Fag eeeseeses PR TT d Referto Subsesion 822 R T w 5 48 Measured value PV 5 of 5 ofinputrange 5 ofinputrange erR A PID control PID contol ty output value MV Output limiter upper limit to PID conto ONE output limiter lower limit 3 9 10 11 12 e E Heating cooling Heating control output value 50 to heating output limiter PID control MV monitor D limit 5 0 to PID PID control Notused used 9 13 14 15 16 Pe one cL MN NN control output value 50 to n output limiter Ry PID control MV monitor upper limit 5 0 to E E 17 Control output flag Refer to Subsection 8 2 6 R ale oS 21 24 Heater current measured value O to 1050 0 0 to 105 0A L ie 2 5 26 ar pe Biemalnoutvane pe o e 0 S
22. 0 optimal 8 PID constants may not be acquired Do not use the output change ratio limiter when performing startup tuning zl 3 un E 3 Bunoouseqnou CO 55 6 Introduction of Functions FX3U ALC User s Manual 6 9 Startup Tuning Function 6 9 2 Conditions for performing and aborting ST startup tuning 56 Conditions for performing ST startup tuning Startup tuning can be performed when all the following conditions are satisfied The ST execution command buffer memory is set to 1 Performs ST The control start stop changeover set to 1 Starts control The operation mode set to 3 Monitor alarm Control The AUTO MANUAL mode changeover set to 0 AUTO mode The value stored in the output limiter upper limit buffer memory is not the same as the value stored in the output limiter lower limit buffer memory The value stored in the output limiter upper limit buffer memory is 1 0 196 or more The value stored in the output limiter lower limit buffer memory is 999 99 9 or less Input value error upper limit or lower limit has not occurred The proportional band setting is not 0 0 two position control The cascade ON OFF set to 0 Cascade OFF PID control is selected ST cannot be performed during heating cooling PID control The measured value PV is stable if startup tuning should be started when the set value SV is changed The output changes when startup tuning is star
23. 24V DC Grounding Ground resistance 100Q or less Voltage input Pu YY fe i Li COM Shielded cable 30 5 Wiring FX3U 4LC User s Manual 5 3 Output Wiring 5 3 Output Wiring The 4LC incorporates NPN open collector transistor outputs For the output specifications refer to the following Refer to the Section 2 6 FX3U 4LC 24V DC Grounding Ground resistance 1000 or less 31 UOnOnpoJjU uoneogoeds INQ wasis QJ uoneJn6ijuo uonejejsu x 6 suoroun jo uononpoau wey N welbog QO AouejJeyng OO sojdwex 3 Buyoousejqno CO 5 Wiring FX3U 4LC User s Manual 5 4 Terminal Screw and Tightening Torque 5 4 Terminal Screw and Tightening Torque The terminals on the 4LC use M3 screws Refer to the figures below for cable end treatment Tighten the terminals to a torque of 0 5 to 0 8 Nem Do not tighten terminal screws with a torque exceeding the regulation torque Failure to do so may cause equipment failures or malfunctions e When one wire is connected to one terminal Terminal Crimp b 3 2 0 13 screw terminal 6 2mm 0 24 or less 3 20 13 6 2mm 0 24 Terminal or less When two wires are connected to one terminal wa 3 2 0 13 6 2mm 0 24 Terminal Crimp or a Screw terminal 6 3mm 0 25 i or more 3 2 0 13 dI 6 3mm 0 25 or more 6 2mm 0 24 or less Termina
24. Cooling proportional band P Subsection 8 2 23 63 103 143 183 Overlap Dead band Subsection 8 2 27 Caution The overlap dead band buffer memories are invalid in two position control e The overlap dead band buffer memories store 0 in PID control e Set the overlap area within the proportional band Cooling method 44 This function switches the cooling method among air cooling type water cooling type and cooling gain linear type in accordance with the cooling unit type for heating cooling PID control Because cooling characteristics are considerably different between the air cooling method and the water cooling method PID constants suitable to the cooling unit can be obtained by auto tuning if the correct cooling method is selected Air cooling type water cooling type The adopted algorithm postulates heating cooling control for plastic molding machines This algorithm offers good response to the set value also in units having a cooling mechanism with nonlinear characteristics and achieves response characteristics to the set value with a small overshoot Cooling gain linear type The adopted algorithm postulates for applications without nonlinear cooling capacity An algorithm is used for applications without nonlinear cooling capacity such as an electronic cooler using a Peltier device is adopted Associated buffer memory Description Reference Cooling method setting 232 Sub
25. Description nis Setting range 32000 to 32000 122 162 202 However make sure that the external input range upper limit is larger 10000 RAW than the external input range lower limit 8 2 47 BFM 83 BFM 123 BFM 163 BFM 203 External input range lower limit Backup CH1 82 To these buffer memories set the external input range lower limit for setting the lower limit of the external input For details on the external input range upper limit refer to Subsection 8 2 46 Description Tel Setting range 32000 to 32000 123 163 203 However make sure that the external input range upper limit is larger R W than the external input range lower limit CH1 83 106 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 48 BFM 84 BFM 124 BFM 164 BFM 204 External output range upper limit z To these buffer memories set the external output range upper limit for setting the upper limit of the external S output For details on the external output range lower limit refer to Subsection 8 2 49 MEM ESL miia Backu 2 range 32000 to 32000 84 124 164 204 However make sure that the external output range upper limit is larger 10000 than the external output range lower limit x 8 2 49 BFM 85 BFM 125 BFM 165 BFM 205 External output range lower limit wasis GO To these buffer memories set the externa
26. For details on the flag refer to Subsection 8 2 1 8 2 44 BFM 77 BFM 117 BFM 157 BFM 197 Setting limiter lower limit To these buffer memories set the setting limiter lower limit for setting the lower limit of the set value SV For details on the set value SV refer to Subsection 8 2 15 For an operation example of the setting limiter lower limit refer to Subsection 8 2 40 For details on the setting limiter upper limit refer to Subsection 8 2 40 Initial Description Setting range e Internal temperature input Input range lower limit to Setting limiter upper limit 1 77 117 157 197 Internal micro voltage 100 R W Scaling range lower limit to Setting limiter upper limit 1 e External input External input range lower limit to Setting limiter upper limit 1 Caution e When handling numbers containing decimal places multiply the set value by 10 e f a value outside the setting limiter range is entered the set value range error flag b1 turns ON If the setting limiter upper limit or setting limiter lower limit becomes outside the input range due to a change of the input type the set value range error flag b1 turns ON When changing the input type make sure that the setting limiter upper limit and lower limit do not exceed the input range For details on the input type refer to Subsection 8 2 52 For details on the flag refer to Subsection 8 2 1 103 UOnOnp
27. Measured value PV o 0 e Measured value is displayed Alarm operation Alarm function is disabled ea Output OFF utpu 0 Transistor output selection 0 to 2 p Stops control Output Output OFF Transistor output selection 3 to 6 p Output d Output OFF Transistor output selection 7 p Measured value PV pO Measured value is displayed Alarm operation Alarm function is disabled Alarm function is enabled Arithmetic operation result in proportion to time Output Transistor output selection 7 alarm status 1 For details on the transistor output selection function refer to Section 6 3 Output T Output OFF 1 Transistor output selection O to 2 Starts control 88 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 22 BFM 58 BFM 98 BFM 138 BFM 178 Proportional band P z Heating proportional band P S 2 To these buffer memories set the proportional band P for performing standard PID control or the proportional band P on the heating side for performing heating cooling PID control The proportional band is required to give the control output in proportion to the deviation difference between 2 the set value SV and the measured value PV Y As the value set here increases changes in the control output MV versus changes in the input become 8 smaller Conversely as the value set here decreases changes in the control output MV become larger z Note that too
28. Setting range Refer to the following 0 RW Z m Alarm 3 setting value 9g ao 51 131 171 Setting range Refer to the following 0 RW J 96 n Oo Alarm 4 setting value E 52 132 172 Setting range Refer to the following 0 RW 4 Setting range T gt Alarm mode Setting range D 3 1 Upper limit input value 7 Upper limit input value alarm 4 alarm with wait niput range 2 Lower limit input value Lower limit input value alarm 4 alarm with wait Input range 3 Upper limit deviation Upper limit deviation value 12 Upper limit deviation value alarm n 2 w alarm alarm with wait with re wait span to span T 4 Lower limit deviation 10 Lower limit deviation value 13 Lower limit deviation value alarm 2 alarm alarm with wait with re wait span to span 3 lt Upper lower limit Upper lower limit deviation Upper lower limit deviation value 2 5 ger 11 14 0 to span deviation value alarm with wait alarm with re wait 9 seem ET LLL ese my O 1 Input range for internal temperature input 39 Scaling range for internal micro voltage input Q2 External input range for external input 2 Input span for internal temperature input Scaling span for internal micro voltage input External input span for external input Caution Bunoouseqnou CO When handling numbers containing decimal places multiply the set value by 10 85 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details
29. When terminating the shield at Earth ensure that no earth loops are accidentally created When reading analog values EMC accuracy can be improved out by averaging the readings This can be achieved either through functions on the analog special function blocks for or through a users program in the FX3G FX3U FX3UC Series PLC main unit e Installation in Enclosure Programmable logic controllers are open type devices that must be installed and used within conductive control cabinets Please use the programmable logic controller while installed within a conductive shielded control cabinet Please secure the cabinet door to the control cabinet for conduction Installation within a control cabinet greatly affects the safety of the system and aids in shielding noise from the programmable logic controller FX3U ALC User s Manual Associated Manuals Associated Manuals Only the installation manual is packed together with the FX3U 4LC temperature control block For a detailed explanation of the FX3U 4LC temperature control block refer to this manual For the hardware information and instructions on the PLC main unit refer to the respective manuals Refer to these manuals v Refer to the appropriate equipment manual A Fora detailed explanation refer to an additional manual Document DEN Description number Model code Title of manual Manual for the Main Unit FX3G Series PLCs Main Unit Describes FX3G Series PLC
30. contact your local Mitsubishi Electric distributor Turn off the power to the PLC before connecting or disconnecting any extension cable Failure to do so may cause equipment failures or malfunctions 125 Turn off the power to the PLC before attaching or detaching the following devices 141 Failure to do so may cause equipment failures or malfunctions Peripheral devices display modules expansion boards and special adapters O extension units blocks FX Series terminal block and the special function units blocks Battery and memory cassette DISPOSAL PRECAUTIONS Please contact a certified electronic waste disposal company for the environmentally safe recycling and disposal of your device 6 TRANSPORTATION PRECAUTIONS The PLC is a precision instrument During transportation avoid impacts larger than those specified in the general specifications of the PLC main unit manual Failure to do so may cause failures in the PLC After transportation verify the operations of the PLC MEMO FX3U 4LC User s Manual FX3U 4LC User s Manual LLLI NL NN 9 2010 Foreword This manual describes the FX3U 4LC temperature control block and should be read and understood before attempting to install the hardware Store this manual in a safe place so that you can take it out and read it whenever necessary Always forward it to the end user This manual confers no industrial property rights or any rights of any other
31. reverse rotation and an interlock circuit to prevent damage to the equipment at the upper and lower positioning limits uoneoyioedg wasis OO 2 Note that when the PLC CPU detects an error such as a watchdog timer error during self diagnosis all outputs are turned off S Also when an error that cannot be detected by the PLC CPU occurs in an input output control block output control may be e disabled S External circuits and mechanisms should be designed to ensure safe machinery operation in such a case S 3 Note that when an error occurs in a relay triac or transistor output device the output could be held either on or off For output signals that may lead to serious accidents external circuits and mechanisms should be designed to ensure safe machinery operation in such a case uonejejsu x DESIGN PRECAUTIONS N CAUTION Do not bundle the control line together with or lay it close to the main circuit or power line As a guideline lay the control line at least 100mm 3 94 or more away from the main circuit or power line Noise may cause malfunctions Ground the shield wire or shield of the shielded cable at one point on the PLC However do not ground them at the same point as the high voltage lines Noise may cause malfunctions Install module so that excessive force will not be applied to the terminal blocks Failure to do so may result in wire damage breakage or PLC failure Buu Ol o DISPOSAL PRECAUTIONS N
32. 2 46 BFM 82 BFM 122 BFM 162 BFM 202 External input range upper limit 106 8 2 47 BFM 83 BFM 123 BFM 163 BFM 203 External input range lower limit 106 8 2 48 BFM 84 BFM 124 BFM 164 BFM 204 External output range upper limit 107 8 2 49 BFM 85 BFM 125 BFM 165 BFM 205 External output range lower limit 107 8 2 50 BFM 86 BFM 1 26 BFM 166 BFM 206 Transistor output selection 108 8 2 51 BFM 87 BFM 127 BFM 167 BFM 207 ST startup tuning execution command 109 8 2 52 BFM 208 BFM 214 BFM 220 BFM 226 Input type seeseeeseereeeeeees 110 8 2 53 BFM 209 to 212 BFM 215 to 218 BFM 221 to 224 BFM 227 to 230 Alam mode seting 1 16 4 5 o ee Era a et s er veda epe a BUE RE LEN Un ka o E ocu e aioli 111 FX3U 4LC User s Manual 9 2 54 BFM 232 Cooling method Setting ete te oit eU Ree Ue ee eec enses edet ecu ERee resa eds 112 8 2 55 BFM 233 Alarm dead band setting eeeesseesssesessssessseeneeeenenen enne 113 3 2 00 BF M Z2934 Alarm delay COUNT ied eade bit las EE e o eee eoe Cu Saec oe Evite edt sss 114 8 2 57 BFM 235 Number of times of heater disconnection alarm delay Number of times of current error detection when output is OFF delay 115 8 2 58 BFMZ236 Temperature r
33. 220 and BFM 226 Enter a value as follows in accordance with the decimal point position When the decimal point position is O enter a value as it is When the decimal point position is 1 enter a 2 value multiplied by 10 D For details on the decimal point position refer to Subsection 8 2 2 S For details on the setting limiter upper limit refer to Subsection 8 2 40 8 For details on the setting limiter lower limit refer to Subsection 8 2 41 S For details on the input type refer to Subsection 8 2 52 Description Initial E value 128 168 Setti 8 2 16 BFM 49 to 52 BFM 89 to 92 BFM 129 to 132 BFM 169 to 172 Alarm setting value 1 to 4 wasis QO 48 uoneJn6ijuo To these buffer memories enter the set value of each alarm set by the alarm mode setting buffer memories The alarm mode setting buffer memories allow arbitrary selection of 4 types of alarms among available 14 types of alarms Write the setting value 1 to 4 of the alarm after setting the alarm mode The unit and setting range of the set value vary depending on the selected alarm mode Enter the set value suitable to the selected alarm mode uonejejsu x For details on the alarm mode setting refer to Subsection 8 2 53 BFM No Initial Description Backup Alarm 1 setting value 49 129 169 Setting range Refer to the following po RW i Alarm 2 setting value Buum Ol o 50 130 170
34. 5 Wiring 27 uM POWGF SUDD mu riuaem c p E 28 DU T POWSESHDDIVAWIPIFIO seenen Tec Diti aeq od Ous a Ho URL a diio ea Pots ei SUR net ha m beboP psi deci dut oRa 28 HM Z COUN ING wines C RH M 28 BZ ADUE WV IPMN ccc 29 5 2 1 Wiring example of thermocouple ccccccccccssececsececceeeeceeeeeeseeeeeseaeeeeseesesseeeeeseeseesaaeeessaeseeesanes 29 5 2 2 Wiring example of resistance thermometer essen eene enne nnne nnn nnne 29 5 2 3 Wiring example of micro voltage input ssesssessssssssseeeneeenenennmennee nennen nennen nennen 30 93 9 XOUIDUE VVIFIFIC 15 3 acides une Hea tuve ciet inset E 31 5 4 Terminal Screw and Tightening Torque ccccccseeecceeeeceeeeeeeeeeeceeeeceeeeeseueeseeeeeseueesseeeeseeseesaeeens 32 FX3U 4LC User s Manual 6 Introduction of Functions 33 OL Wr CU OS NS eS ERR IUE 33 6 2 Control Mode Switch FUnGllOn o ooo ooiooo c o5 00395009207580060925300992208906002 3 920202 8024000 sr SENI EOS ERR DO Ge 34 6 3 Transistor Output Selection FUN CUO Mischa cheater temer md nem m m 36 SX PID COM UO NR TRA 38 6 4 1 Easy PID control with two degrees of freedom sessssssssssseseeeeeen nennen 38 64 2 Overshootpreventori TUI OE oce ecco eon ecd a uocem mice mete ead asDeuattussu e ssp ieucu tat a RE EAE TUE 39 6 5 TWO DOSIHOTT COMO oerna 622
35. C CT monitor method switch 238 Set 0 ON current OFF current initial value Set 800 initial value Git rato Seming meaa When a current detector CTL 6 P H is used Control mode switch 240 Set 0 initial value 75 115 Set 1 Reverse operation initial value 131 UONnOnpoJjU uoneogoeds INQ wasis OO uoneJn amp ijuo uonejejsu m Buum Ol o suoroun J JO uononpoau wey N Ajowey Jayng OO 1 o c c D 62 3 o o p E Q FX3U 4LC User s Manual 9 Program Examples 9 2 Example of a Program for PID Control 9 2 3 Device assignments 132 Device assignments of the example program are assigned as follows Device No X000 X001 X002 X003 X004 X005 MO to M15 M20 to M35 M40 to M55 DO D1 D5 D6 D9 D10 D21 D22 D252 Contents of operation When X000 is turned on parameters are initialized in the buffer memory Initializes all data Error reset is performed PID control is started Performs auto tuning CH1 Performs auto tuning CH2 The state of a flag is read The example program has included operation to carry out external output of the state of the error present b0 The state of an event CH1 is read The example program has included operation to carry out external output of the state of the loop disconnection alarm b8 of CH1 The state of an event CH2 is read The example program has included operation to carry out e
36. CAUTION Please contact a certified electronic waste disposal company for the environmentally safe recycling and disposal of your device suonoun4 jo uononpoau TRANSPORTATION PRECAUTIONS N CAUTION wey N The PLC is a precision instrument During transportation avoid impacts larger than those specified in the general specifications of the PLC main unit manual Failure to do so may cause failures in the PLC After transportation verify the operations of the PLC welbag QO AouejJeygng OO sojdwex 3 Bunoouseqnou CO 17 2 Specification FX3U 4LC User s Manual 2 1 General Specifications 2 1 General Specifications For items not listed below specifications are the same as the of the PLC main unit For general specifications refer to the manual of the PLC main unit Refer to FX3G Hardware Edition Refer to FX3U Hardware Edition Refer to FX3uc Hardware Edition Item Specification Dielectric withstand voltage 500V AC for one minute Between all terminals and ground terminal Insulation resistance 5M or more by 500V DC Megger 2 2 Power Supply Specifications Item Specification 24V DC 20 15 50mA Connect a 24V DC power supply to the terminal block 5V DC 160mA 5V DC power is supplied internally from the main unit Interface driving power CPU driving power 2 3 Performance Specifications Item Specification Two position control PID control Heating cooling PID
37. External 3 5 Heating cooling PID TEILE 5 control ini E nterna Two position control intemal External e When internal input is selected The 4LC performs control using measured values detected through inputs built into the 4L C e When external input is selected The 4LC performs control using values stored in external input value buffer memories BFM 25 to BFM 28 without using inputs built into the 4L C e When internal output is selected The 4LC performs control using transistor outputs built into the 4L C However in heating cooling PID control the control output of CH2 and CH4 should use an external output e When external output is selected The 4LC performs control using values stored in external output value monitor heating external output value monitor buffer memories BFM 32 to BFM 35 and cooling external output value monitor buffer memories BFM 36 to BFM 39 without using transistor outputs built into the 4LC The transistor output built into the 4LC is controllable when transistor output selections 1 and 2 are chosen Additionally the outputs can also be used as alarm outputs For details on the external input value refer to Subsection 8 2 8 For details on the external output value refer to Subsection 8 2 11 or 8 2 12 For details on the transistor output selection refer to Subsection 8 2 50 6 Introduction of Functions FX3U ALC User s Manual 6 2 Control Mode Switch Function Point When external
38. NM Subsection 8 2 4 gp Heating control output value MV monitor D 13 14 15 16 Cooling control output value MV monitor Subsection 8 2 5 2 CERTES SE 1 17 Control output flag Subsection 8 2 6 86 126 166 206 Transistor output selection Subsection 8 2 50 240 241 Control mode switch Subsection 8 2 62 waisks QO uoneinByuoy uonejejsu x 5 E jo uononpoJju wey N Kowa seyng OO welboug CO sojdwex Bunoouseqnou CO 37 6 Introduction of Functions FX3U ALC User s Manual 6 4 PID control 6 4 PID control 6 4 1 Easy PID control with two degrees of freedom PID control is a control method to obtain stable control result by setting each of the constants P proportional band I integral time and D derivative time However if each PID constant is so set that the response to setting becomes good the response to disturbance becomes deteriorated in PID control On the contrary if each PID constant is so set that the response to disturbance becomes good the response to setting becomes deteriorated The 4LC performs easy PID control with two degrees of freedom in which PID constants realizing good response to disturbance are adopted and the shape of the response to setting can be selected as either fast medium or slow Select fast medium or slow using the control response parameter Select control mode O to 3 for performing PID control Fo
39. Ol o b8 Adjustment data error turned OFF z 2 Turn the power ON again and check for changes in the state If no 2 a improvement is obtained consult a Mitsubishi Electric distributor 5 2 o Turns ON when an error has been caused by noise or when a z b9 Cold contact temperature compensation data error failure has occurred in the 4L C The control output of error channels is turned OFF The error channels can be checked in the status of bits of Event buffer memories BFM 1 to 4 b10 A D converted value error Turn the power ON again and check for changes in the state If no improvement is obtained consult a Mitsubishi Electric distributor b12 Controlling flag Turns ON when 4LC is performing control b13 Set value being backed up flag Remains ON while set values are being backed up b14 Initialization completed flag Turns ON when Initialization completed 7 c 3 b15 Turns ON when 4LC becomes ready for operation D Operation of temperature control ready flag b15 a Once the power supply has been turned ON the 4LC is ready Temperature control ready flag turns ON 8 Temperature control ON Eos maximum ready flag b15 9 OFF z E Power is turned ON Temperature control CPU 3 ready for operation Caution Bunoouseqnou CO e While the temperature control ready flag is ON the 4LC accepts the FROM TO instructions or direct buffer memory specification The 4LC does not perform control for
40. QJ O O h Q ev z O 5 uonejejsu Buum Ol o suonoun jo uononpoau wey N welbog QO AouejJeyng OO sojdwex 3 Bunoouseqnou CO 4 Installation FX3U 4LC User s Manual 4 2 Direct Mounting 4 2 Direct Mounting 26 The product can be installed directly with screws An interval space of 1 to 2mm 0 04 to 0 08 between each unit is necessary For installation details refer to the following respective PLC manual For mounting hole pitches refer to Section 1 2 Refer to the FX3G Hardware Edition Refer to the FX3u Hardware Edition Refer to the FX3uc Hardware Edition Create mounting holes in the mounting surface according to the external dimensions diagram Fit the 4LC A in the figure to the right to the mounting holes and tighten with M4 screws B in the figure to the right For the screw position and quantity refer to the dimensioned drawing specified below For dimensions refer to Section 1 2 Connect the extension cable Connect the extension cable to the main unit I O extension unit block or special function unit block on the left side of the product Refer to Step 3 in Section 4 1 For information on the extension cable connection procedure refer to the respective PLC manual Refer to the FX3c Hardware Edition Refer to the FX3u Hardware Edition Refer to the FX3uc Hardware Edition Example of direct installation 1
41. Reference Make sure to shut down all phases of the power supply externally before installing Failure to do so may cause electric shock or damage to the product NCAUTION a Use the product within the generic environment specifications described in PLC main unit manual Hardware Edition Never use the product in areas with excessive dust oily smoke conductive dusts corrosive gas salt air Cl2 H2S SO2 or NO2 flammable gas vibration or impacts or expose it to high temperature condensation or rain and wind If the product is used in such conditions electric shock fire malfunctions deterioration or damage may occur Do not touch the conductive parts of the product directly Doing so may cause device failures or malfunctions Install the product securely using a DIN rail or mounting screws Install the product on a flat surface If the mounting surface is rough undue force will be applied to the PC board thereby causing nonconformities When drilling screw holes or wiring make sure that cutting and wiring debris do not enter the ventilation slits Failure to do so may cause fire equipment failures or malfunctions Be sure to remove the dust proof sheet from the PLC s ventilation port when installation work is completed Failure to do so may cause fire equipment failures or malfunctions Connect extension cables securely to their designated connectors Loose connections may cause malfunctions Turn off the power to the
42. action 1 Stop the PLC and turn the power ON again If the ERROR ERR LED goes out a watchdog timer error may have occurred Adopt any of the following measures Review the program Set the maximum value D8012 lower than the watchdog timer value Check that the input used for input interrupt or pulse catch is not being abnormally turned ON and OFF in one scan Check that the frequency of the pulse duty 5096 input to the high speed counter is not exceeding the specified range Add WDT instructions A watchdog timer error may have occurred Add some WDT instructions to the program and reset the watchdog ON or the hardware of the PLC may be timer several times in one scan damaged Change the watchdog timer value Change the watchdog timer setting D8000 in the program so that the setting is larger than the maximum value of the scan time D8012 2 Remove the PLC and supply the power to it from another power source If the ERROR ERR LED goes out noise may have affected the PLC Adopt the following measures Check the ground wiring and re examine the wiring route and installation location Fita noise filter onto the power supply line 3 Ifthe ERROR ERR LED does not go out even after measures in 1 and 2 are adopted consult a Mitsubishi Electric distributor One of the following errors has occurred on the PLC Flicker e Parameter error Perform PLC diagnosis and program check with the programming tool e Syntax e
43. an alarm is issued The sampling period is 500ms for the heater current measured value and the current value while the output is OFF Associated buffer memory BFM No 1 Event b9 Heater disconnection alarm Subsection 8 2 2 21 Heater current measured value Subsection 8 2 7 53 93 133 173 Heater disconnection alarm set value Subsection 8 2 17 Description Reference Number of times of heater disconnection alarm delay 235 Subsection 8 2 57 Number of times of current error detection when output is OFF delay 61 A uononpoJu uoneogoeds INQ ues s QO uoneJn6ijuo uonejejsu m 5 E jo uononpoJju wey N welbag CO Aow nyng OO So duJex4 Bunoouseqnou CO 6 Introduction of Functions FX3U 4LC User s Manual 6 12 Loop Breaking Alarm Function LBA 6 12 Loop Breaking Alarm Function LBA 6 12 1 Loop breaking alarm function The loop breaking alarm function starts to detect the variation of the measured value PV at every loop breaking alarm judgment time when the output becomes more than 100 or the output limiter upper limit or less than 0 or the output limiter lower limit then sets to ON the loop breaking alarm b8 when judging that there is an abnormality in the control loop The loop breaking alarm function is enabled when the loop breaking alarm judgment time is set It is possible to set a dead zone that is excluded from loop breaking detectio
44. approximately 5 seconds after the power is turned ON 7T 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 2 BFM 1 to 4 Event 78 The ON OFF status of each bit indicates the status of each channel The bit assignment is the same for all channels Initial pes e eewmeeromenben Description Backup CH1 Event bO Input error upper limit Turns ON when input value is over scale b1 Input error lower limit Turns ON when input value is under scale b2 Cold contact temperature compensation data error Turns ON when an error has been caused by noise or when a failure has occurred in the 4L C b3 A D converted value error Turn the power ON again and check for changes in the state If no improvement is obtained consult a Mitsubishi Electric distributor b8 Loop breaking alarm Turns ON when a loop breaking alarm has occurred b9 Heater disconnection alarm Turns ON when a heater disconnection alarm has occurred b10 Current error when output is OFF Turns ON when a current error occurs while output is OFF b11 ST startup tuning being performed Remains ON while startup tuning is being performed Turns ON when input range is set to 0 1 C F b12 Decimal point position 0 1 C F mV 1 0 1 C F Turns ON when transition to manual mode is completed b13 MANUAL mode transition completed flag 0 AUTO mode 1 MANUAL mode b14 AT auto tuning being per
45. details on the measured value PV refer to Subsection 8 2 3 For details on the set value SV refer to Subsection 8 2 15 For details on the alarm setting value refer to Subsection 8 2 16 For details on the alarm mode setting refer to Subsection 8 2 53 Setting range 0 to 30000 0 RW Example of operation When the number of alarm delays is set to 5 times CH1 234 Measured value PV Measured value PV Alarm set value Set value SV Time Input sampling gt lt t _ _ gt 3 times 5 times Non alarm status Alarm status 114 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 57 BFM 235 Number of times of heater disconnection alarm delay z Number of times of current error detection when output is OFF delay E 2 To this buffer memory set the number of times of delay for detecting heater disconnection or detecting current abnormality while the output is OFF The setting is applied to all channels 2 If abnormality occurs continuously exceeding the preset number of times in the heater current measured o value or the current value while the output is OFF an alarm is issued 8 The sampling period is 500ms for the heater current measured value and the current while the output is OFF z For details on the heater disconnection alarm refer to Section 6 11 For details on the heater current measured value refer to Subsectio
46. gt Set value is D Set value SV 1 Alarm set value gt Wait operation region Wait operation region Measured value PV Time Non alarm status Aarm status 3 ll Aan status 7 Alarm FX3U 4LC User s Manual 7 3 Alarm Dead Zone Setting 7 3 Alarm Dead Zone Setting In BFM 233 set the dead zone of alarms 1 to 4 This setting is applied to all of alarms 1 to 4 When the measured value PV is near the alarm set value the alarm status and the non alarm status may be repeated by fluctuation in inputs In order to cope with such a case by setting the alarm dead zone repeating of the alarm status and the non alarm status can be prevented For details on the alarm dead band setting refer to Subsection 8 2 55 Upper limit input value alarm Upper limit deviation alarm Measured value PV m Measured value PV DOO NOU ES RS RRR SR e e Ue S RR EN e eee Oe Ue Se QR UTI SOR SEPIA Dead zone Alarm set value gt x Time Non alarm status Alarm status I Alarm status Lower limit input value alarm Lower limit deviation alarm Measured value PV 4 Measured value PV NNI IE AU RENE EA an NITE Dead zone X Alarm set value gt Time Non alarm status Alarm status Alarm status Upper lower limit deviation Measured value PV Measured value PV Al a r set Va U e gt XK KK
47. heater disconnection alarm delay it is possible to issue an alarm when abnormalities in the heater current measured value exceed the preset number of times For details on the number of times of heater disconnection alarm delay refer to Subsection 6 11 2 Example of connection Power supply Control output Solid state relay FX3u 4LC Current detector CT Current detector input Measured value PV Control target Operation When either of the following occurs it is considered as a cause for the heater disconnection alarm status and b9 of the event buffer memory turns ON e When the heater current does not flow Caused by heater disconnection error in operating machine etc When the reference current measured value is equivalent to or less than the current set value for the heater disconnection alarm while the control output is ON an alarm is issued However if the control output ON time is 0 22 sec or less heater disconnection alarm function is not issued When the heater current does not turn OFF Caused by a molten relay etc When the reference heater current measured value is more than the current set value for the heater disconnection alarm while the control output is OFF an alarm is issued However if the control output OFF time is 0 22 sec or less heater disconnection alarm function is not issued Current detector CT Type Current measurement range CTL 12 S36 8 0 0 to 100 0A CTL 12 S56 1
48. input span for external input wasis QJ uoneJn6ijuo 2 These buffer memories can be written only while standard PID control is being performed uonejejsu x Example of operation LBD operation gap LBD operation gap a Pa Non alarm status region gt ert Loop breaking ON Buum Ol alarm function E Alarm status region e Alarm status region Loop breaking OFF N P alarm THRONO Temperature fall A Temperature rise 6 Set value SV m LBD set value 2 8 e 3 While the temperature is rising Alarm status region While the temperature is decreasing Non alarm status region 4 While the temperature is rising Non alarm status region While the temperature is decreasing Alarm status region 7 c 3 5 Loop breaking alarm dead zone operation gap 0 8 C for internal temperature input 0 8 of the scaling span for internal micro voltage input 0 8 of the external input span for external input UJ Caution When handling numbers containing decimal places multiply the set value by 10 e While the measured value PV is located within the non alarm region alarm is not issued even if the alarm E condition is satisfied 9 n heating cooling PID control the loop breaking alarm dead zone is invalid s E 3 Bunoouseqnou CO 105 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 44 BFM 80 BFM 120 BFM 160 BFM 200 Micro v
49. is completed Then KO S S is written to BFM 56 96 8 O X004 Because of this auto tuning can TO D KO K56 K1 K1 be performed again Performs auto tuning CH1 If auto tuning does not have to be performed again the upper x005 two lines can be omitted O Eod Performs auto tuning CH2 in accordance with the event wey N status MO Yo00 An error is present An error is present 8 M28 S oo CH1 Loop breaking alarm E CH1 Loop breaking alarm S M48 E Yo02 CH2 Loop breaking alarm CH2 Loop breaking alarm END 1 o c c D 62 3 o o p E Q 135 9 Program Examples FX3U ALC User s Manual 9 3 Example of a Program for Heating Cooling PID Control 9 3 Example of a Program for Heating Cooling PID Control This section provides an example of a program for heating cooling PID control 9 3 1 System configuration The system configuration shown below explains the example program CH1 Measured value PV CH1 Sensor Type K thermocouple CH1 Heater current Cooler measured value Temperature chamber ae CH1 Current detector CTL 6 P H FX3U Series FX3U ALC Main unit Unit No 0 OUT1 Heating control output MV Solid state relay OUT2 Cooling control output MV 9 3 2 Conditions of operation The example program set up with the following operation conditions Initial values are used for conditions of operation other than the ones listed below They are
50. is stopped 35 A uononpoJu uoneogoeds INQ wasis OO uoneJn6ijuo uonejejsu m 5 E jo uononpoJju wey N welbag CO Aow nyng OO So duJex4 Bunoouseqnou CO 6 Introduction of Functions FX3U ALC User s Manual 6 3 Transistor Output Selection Function 6 3 Transistor Output Selection Function The transistor output selection function selects either one among control output breaking alarm output for transistor outputs built into the 4L C For example when external outputs are used for control transistor outputs built into the 4L C are not required and can be used as alarm outputs The transistor output selection function varies depending on the control mode setting Set the transistor output for each channel For details on the control mode switch refer to Section 6 2 Transistor output selection alarm output and loop as shown below Transistor Control mode BFM 240 CH1 CH2 BFM 241 CH3 CH4 ER 0 1 PID control 2 3 PID control um E oU RM cA DES set value Internal output External output TIT opun External output Normally OFF Normally OFF Normally OFF CH1 cooling control output Normally OFF OUT3 CH3 control output Normally OFF Normally OFF CH1 heating control output CH1 heating control output CH1 heating control output CH1 heating control output CH2 heating control output CH3 heating control output CH4 heating control
51. may repeatedly turn on and off or may not turn ON In such a case change the loop breaking alarm judgement time in accordance with the situation e n heating cooling PID control the loop breaking alarm function is disabled e While AT auto tuning is performed the loop breaking alarm function is disabled e When 0 is entered the loop breaking alarm function is disabled 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 43 BFM 79 BFM 119 BFM 159 BFM 199 Loop breaking alarm dead zone z Set the loop breaking alarm judgement time S The loop breaking alarm function may issue alarms caused by disturbances effect of another heat source etc even if there is no abnormality in the control system In order to prevent such alarms by setting the loop breaking alarm dead zone the region in which the alarm function is disabled non alarm status region can be 2 set Cp For example if the loop breaking alarm dead zone is set to 10 C 10 C above the set value SV and 10 C S below the set value SV are treated as the non alarm status region width of 20 C in total 8 For details on the loop breaking alarm function refer to Section 6 12 S Initial Description Setting range e PID control 79 119 159 199 0 to Input span 0 Disabled R W e Heating cooling PID control 0 Not used 1 Input span for internal temperature input Scaling span for internal micro voltage input External
52. memories can be written only in MANUAL mode Example of operation When the control output cycle is 30 sec and the MANUAL output set value is 6096 18 sec lt a ON Control output 40 OFF ba Control output cycle 30 sec wajsks GO uoneinByuoy uonejejsu x Caution e Handling numbers containing decimal places The set value should be the actual value multiplied by 10 Buum OW These buffer memories can be written only in MANUAL mode Write these buffer memories after transfer to MANUAL mode is completed that is after b13 of the event buffer memory turns ON o The actual output value is within the range from the output limiter lower limit to the output limiter upper limit In AUTO mode these buffer memories automatically store the control output value MV S53 For details on the event refer to Subsection 8 2 2 Ss aS O 8 2 20 BFM 56 BFM 96 BFM 136 BFM 176 AT auto tuning execution command These buffer memories stop or perform auto tuning Write KO to stop auto tuning Write K1 to perform auto tuning 7 c 3 For details on the AT auto tuning refer to Section 6 8 BEEN ES MN value po Rw CH1 0 Stops AT auto turning ins 6 136 erre Performs AT auto turning w Caution e When performing auto tuning again write KO wait for 0 5 sec or more and then write K1 again 3 Auto tuning can be performed in PID control and heating coo
53. memories can be written only while standard PID control is being performed CH1 2 Oin the case of heating cooling PID control Caution Handling numbers containing decimal places The set value should be the actual value multiplied by 1000 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 66 BFM 248 249 Cascade bias z O To these buffer memories set the cascade bias added to the control output MV from the master channel during cascade control Control group 1 GR1 The setting is applied to CH1 and CH2 Control group 2 GR2 The setting is applied to CH3 and CH4 2 For details on the cascade control refer to Section 6 7 P For details on the cascade gain refer to Subsection 8 2 65 CH1 Description ed value inci Setting range PID control 1000 to 1000 100 0 to 100 096 R w Heating cooling PID control 0 Not used 1 These buffer memories can be written only while standard PID control is being performed wasis QJ uoneJn6ijuo Caution Handling numbers containing decimal places The set value should be the actual value multiplied by 10 uonejejsu x 8 2 67 BFM 250 251 Cascade monitor These buffer memories store the value from the master channel which is converted using the cascade gain and cascade bias The value stored in a cascade monitor is as follows Buum OW Cascade monitor value Master channel control o
54. not shown in this example Please add to the example of a program if needed Item Conditions of operation CH1 CH2 Alarm 1 set value 49 Upper limit deviation is set to 30 0 C Alarm 2 set value Lower limit deviation is set to 30 0 C Operation mode Set 3 Monitor Alarm Control initial value Heating proportional band P ds Cooling proportional PID value ee IE 59 Set by auto tuning Integral time I 60 Derivative time D 61 Control response parameter 62 Set 1 Medium Overlap Dead band 63 Set 0 initial value Transistor output selection 86 Set 0 initial value Input range Set 1 K type 100 0 to 400 0 C Alarm 1 mode setting Set 12 Upper limit deviation alarm with re wait Alarm 2 mode setting Set 13 Lower limit deviation alarm with re wait Cooling method setting 232 Set 0 Air cooling Temperature rise completion range setting 236 Set 3 C CT monitor method switch 238 Set 0 ON current OFF current initial value Set 800 initial value When a current detector CTL 6 P H is used Control mode switch 240 Set 4 CT ratio setting 239 136 9 Program Examples FX3U ALC User s Manual 9 3 Example of a Program for Heating Cooling PID Control A 9 3 3 Device assignments z Q S Device assignments of the example program are assigned as follows o Device No Contents of operation X000 When X000 is turned on parameters are initialized in the buffer memory 2 X001 Init
55. of the digital filter here in accordance with the control target characteristics and noise level 2 Entering too small a value may not give the filter a beneficial effect Entering too large a value deteriorates the D input response 8 Description o Backup 9 CH1 CH2 CH3 value 112 3152 192 Setting range 0 to 100 sec 0 RW Example of operation wasis QJ Input of actual measured value PV Pulse input caused by noise uoneJn6ijuo Time Time y Input of measured value PV processed Input amplitude by the primary delay digital filter X uonejejsu x Buum Ol Amplitude processed by the filter g lt Time Time 6 Caution UE E e The primary delay digital filter is invalid when 0 is entered and the measured value is acquired in the S sampling period 250ms o When the measured value PV before processing by the digital filter is outside the acquisition range input value error continuously in 2 sampling periods the digital filter is not applied 7 c 3 uei CO Kiowayy yng So duJex4 Bunoouseqnou CO 99 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 37 BFM 73 BFM 113 BFM 153 BFM 193 Setting change ratio limiter 100 When the set value SV is changed the setting change ratio limiter function changes the difference between the former set value SV and the new set value SV gradually Use this function to av
56. or longer as the loop breaking alarm judgment time If the loop breaking alarm judgement time is too short or is not suitable to control targets the loop breaking alarm may repeatedly turn on and off or may not turn ON In such a case change the loop breaking alarm judgement time in accordance with the situation In heating cooling PID control the loop breaking alarm function is disabled While AT auto tuning is performed the loop breaking alarm function is disabled When the set value is 0 the loop breaking alarm function is disabled When the measured value PV is within the loop breaking alarm dead zone alarm is not issued even if the alarm issue condition is satisfied In heating cooling PID control the loop breaking alarm dead zone is invalid 63 UOnOnpoJjU uoneogoeds INQ wasis QJ uoneJn6ijuo uonejejsu m 5 E welbag CO Kioweyjseyng OO sojdwex Bunoouseqnou CO 6 Introduction of Functions FX3U 4LC User s Manual 6 12 Loop Breaking Alarm Function LBA 6 12 2 Loop breaking alarm dead zone LBD 64 Set the loop breaking alarm judgement time The loop breaking alarm function may issue alarms caused by disturbances effect of another heat source etc even if there is no abnormality in the control system In order to prevent such alarms by setting the loop breaking alarm dead zone the region in which the alarm function is disabled non alarm status region can be set For e
57. or read to the PLC main unit through buffer memories 2 To read or write to the 4LC buffer memory use FROM TO instructions or specify buffer memory values Y directly 8 Each buffer memory consists of 16 bits Use the FROM TO instructions or direct specification of buffer z memory in the 16 bit format For details of FROM TO instructions or direct specification of buffer memory refer to the Programming Manual Caution wasis GO uoneJn6ijuo e f a value is written by mistake to a buffer memory used only for read the written value is ignored And 250ms later the buffer memory is overwritten with a correct value e Ifa value outside the allowable set range is written to a buffer memory used both for read and write the set value range error b1 of the flag BFM 0 turns ON The buffer memory number in which an error has been generated is stored in a set value range error address BFM 252 And the buffer memory in which the set value range error has occurred is controlled with the upper limit or the lower limit of the allowable set range uonejejsu x 8 1 Buffer Memory List Buum Ol The table below provides a brief description and reference information for the 4L C buffer memory For details on the buffer memory refer to Section 8 2 The Remarks column in the buffer memory list indicates the following R W Read or Write R Read only Y Data can be backed up using the set value backup command BFM 254 o
58. output CH1 cooling control output CH2 cooling control output CH3 cooling control output CH4 cooling control output CH1 alarm 1 state CH2 alarm 1 state CH3 alarm 1 state CHA alarm 1 state CH1 alarm 2 state OUT1 CH1 control output CH1 alarm 2 state CH1 heating control output CH1 heating control output OUT2 CH1 cooling control output CH2 alarm 2 state CH3 alarm 2 state CHA alarm 2 state CH1 alarm 3 state CH2 alarm 3 state CH3 alarm 3 state CHA alarm 3 state CH1 alarm 4 state CH2 alarm 4 state CH3 alarm 4 state CHA alarm 4 state CH3 cooling control output OUTA CH4 control output CHA alarm 4 state OUT1 CH1 control output CH1 loop breaking alarm state CH1 heating control output Normally OFF OUT2 CH2 control output CH2 loop breaking alarm state Normally OFF CH3 loop breaking alarm state Normally OFF 1 When selecting control mode 4 or 5 use external output for CH2 and CH4 Caution It is not possible to change the setting while control is being performed If the setting i is being performed the contents of setting are reflected when control is stopped 36 s changed while control 6 Introduction of Functions FX3U ALC User s Manual 6 3 Transistor Output Selection Function A Associated buffer memory 3 o BFM No n T E e escription eference E om i Event 1 2 3 4 b4 to b7 Alarm 1 to Alarm 4 Subsection 8 2 2 b8 Loop breaking alarm 2 a leol an TT ee M
59. output value MV refer to Subsection 8 2 4 wasis QJ 8 2 12 BFM 36 to 39 Cooling external output value monitor uoneinByuoy When the control mode using external outputs is selected by the control mode switch function these buffer memories store the cooling control output processed within the output limit and scaled into the external output range For details on the control mode switch refer to Subsection 8 2 62 Description Initial Display range External output range lower limit to external output range upper limit po f RO Caution uonejejsu x Backup CH1 Buu Ol When internal output is selected by a control mode change a cooling control output value MV is stored For details on the cooling control output value MV refer to Subsection 8 2 5 8 2 13 BFM 40 to 43 Set value monitor o These buffer memories store the set value used in PID control and alarm function cz These buffer memories indicate transient changes in the set value on the slave side when the setting change 28 ratio limiter is set or during cascade control o S For details on the setting change ratio limiter refer to Subsection 8 2 37 9 For details on the cascade control refer to Section 6 7 Description s 7 c 3 Display range Setting limiter lower limit to Setting limiter upper limit welbag CO Kiowayy sayjng sojdwex Bunoouseqnou CO 83 8 Buffer Memory FX3U ALC Us
60. places The set value should be the actual value multiplied by 10 Entering a large value to create wide adjustment sensitivity area dead zone increases vertical fluctuation Entering too small a value generates chattering due to small oscillations of the measured value 97 UOnOnpoJjU uoneogoeds INQ wasis GO uoneinByuoy uonejejsu x Buum Ol o suonoun4 jo uononpoau 7 c 3 uei CO Kiowayy yng So duJex4 Bunoouseqnou CO 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 34 BFM 70 BFM 110 BFM 150 BFM 190 Control output cycle setting Heating control output period setting To these buffer memories enter the control output MV cycle For heating cooling PID control enter the control output MV cycle on the heating side Set the time in which the control output MV turns ON and OFF The ON duration and OFF duration of the control output MV are as follows ON duration Control output cycle Control output cycle on heating side sec x Control output value 96 OFF duration Control output cycle Control output cycle on heating side sec x 100 Control output value Description Initial 110 150 190 Setting range 5 to 1000 0 5 to 100 0 sec 890 RW Example of operation When the control output cycle is 30 sec and the control output value MV is 60 18 sec lt gt ON Control output MV OFF Control out
61. set the setting limiter upper limit for setting the upper limit of the set value SV For details on the set value SV refer to Subsection 8 2 15 For details on the setting limiter lower limit refer to Subsection 8 2 41 Description nicia Backup Setting range e Internal temperature input Setting limiter lower limit 1 to Input range upper limit 76 116 156 196 Internal micro voltage of Setting limiter lower limit 1 to Scaling range upper limit e External input Setting limiter lower limit 1 to External input range upper limit Example of operation When the input range is 100 to 1300 C the setting limiter upper limit is 1000 C and the setting limiter lower limit is 09C Input range lower limit meta equ pound tange Input range upper limit 100 C 1300 C Setting limiter lower limit Setting limiter upper limit 0 C 1000 C Caution e When handling numbers containing decimal places multiply the set value by 10 e Ifa value outside the setting limiter range is entered the set value range error flag b1 turns ON If the setting limiter upper limit or setting limiter lower limit becomes outside the input range due to a change of the input type the set value range error flag b1 turns ON When changing the input type make sure that the setting limiter upper limit and lower limit do not exceed the input range For details on the input type refer to Subsection 8 2 52
62. some control targets overshoot caused by 2 hunting is not desirable When the AT bias is set the set value SV AT point with which auto tuning is D performed can be changed S For details on the AT auto tuning refer to Section 6 8 8 ae Initial LJ MMC IE DXILLILLICTTITIE T RN 1 Input span for internal temperature input Scaling span for internal micro voltage input External input span for external input 74 wasis QJ uoneJn6ijuo Example of operation When the AT bias is set to Measured value PV uonejejsu x Set value SV AT bias AT point 5 AT starts AT finishes Time Caution 6 e When handling numbers containing decimal places multiply the set value by 10 53 e If Set value SV AT bias is outside the setting limiter range auto tuning is performed using the setting I limiter value e If any value other than O is set to the setting change ratio limiter when auto tuning is started the set value SV changes in accordance with the setting change ratio limiter until the AT point When the set value SV reaches the AT point b14 AT being performed of the event buffer memory turns ON and auto tuning is started 7 c 3 For details on the event refer to Subsection 8 2 2 For details on the setting change ratio limiter refer to Subsection 8 2 37 For details on the setting limiter upper limit refer to Subsection 8 2 40 For details on the setting l
63. specification for I O wiring Supplied FX3G Series and installation extracted from the FX3G User s Manual A Manual Barawa anial JY997D33401 Hardware Edition For details refer to FX3G Series User s Manual Hardware Edition Additional FAIG Sores seco Describes FX3G Series PLC specification details for I O User s Manual JY997D31301 j 09R521 Manual T wiring installation and maintenance Hardware Edition FX3u Series PLCs Main Unit Describes FX3U Series PLC specification for I O wiring Supplied FX3U Series and installation extracted from the FX3U User s Manual A Manual Hardware Marga JY997D18801 Hardware Edition For details refer to FX3U Series Users Manual Hardware Edition Hardware Edition FX3uc Series PLCs Main Unit Describes FX3Uc D DSS Series PLC specification for O wiring and installation extracted from the FX3uc Supplied FAUM DSS Sanes JY997D28601 Series User s Manual Hardware Edition Manual Hardware Manual l For details refer to FX3uc Series User s Manual FX3U Series a e Additional Users Nanua JY997D16501 Describes FX3U Series PLC specification details for I O 09R516 Manual wiring installation and maintenance Hardware Edition Describes FX3UC 32MT LT 2 specification for I O wiring and installation extracted from the FX3uc User s yon MEET JY997D31601 Manual Hardware Edition For details refer to FXasuc Series User s Manual Hardware Edition Describes FX
64. the scaled value is written to the range from external output range lower limit to external output range upper limit without regard to the setting of the control mode switch function Associated buffer memory 1 5 25 32 36 44 48 76 77 82 83 84 85 86 BFM No Description Reference Event 4 b0 Input error upper limit Subsection 8 2 2 b1 Input error lower limit 7 Measured value PV Subsection 8 2 3 External input value Subsection 8 2 8 External output value Heating external output value monitor Subsection 8 2 11 Cooling external output value monitor Subsection 8 2 12 Control mode monitor Subsection 8 2 14 88 128 168 Set value SV Subsection 8 2 15 116 156 196 Setting limiter upper limit Subsection 8 2 40 117 157 197 Setting limiter lower limit Subsection 8 2 41 122 162 202 External input range upper limit Subsection 8 2 46 123 163 203 External input range lower limit Subsection 8 2 47 124 164 204 External output range upper limit Subsection 8 2 48 125 165 205 External output range lower limit Subsection 8 2 49 126 166 206 Transistor output selection Subsection 8 2 50 240 241 Control mode switch Subsection 8 2 62 Caution It is not possible to change the control mode while control is being performed If the control mode is changed while control is being performed the contents of setting are changed when control
65. the set value SV By two position control the output is forcedly hunted and its amplitude and oscillation cycle are measured PID constants are calculated based on the measured values and stored in each buffer memory The buffer memories shown below store calculated values Applicable buffer memory Calculated value Value to be set Proportional band P Less than 0 1 0 1 Heating proportional band P 1000 0 or more 1000 0 Less than 1 sec 1 sec Integral time l 3600 sec or more 3600 sec Derivative time D 3600 sec or more 3600 sec The calculated integral time multiplied by 2 is automatically written Loop breaking alarm judgement time However 0 remains stored when the loop breaking alarm judgment time is set to 0 when auto tuning is finished wasis GO uoneJn amp ijuo uonejejsu m When auto tuning finishes normally control continues with new calculated PID constants The AT bias can be set for auto tuning 5 E Example of operation When AT is performed while the temperature is rising Measured value PV Set value SV AT starts AT finishes Time Point Before starting auto tuning confirm that all conditions for performing and aborting auto tuning refer to Subsection 6 8 2 are satisfied Before starting auto tuning set the output limiter upper limit heating output limiter upper limit to 100 set the output limiter lower limit to 0 and set the output change ratio limite
66. 0 is entered to these buffer memories Proper PID constants may not be obtained if the output change ratio limiter is set and auto tuning is performed Do not set the output change ratio limiter when performing auto tuning welbag CO Kiowayy sayjng sojdwex Bunoouseqnou CO 95 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 32 BFM 68 BFM 108 BFM 148 BFM 188 Sensor correction value setting 96 To these buffer memories enter the sensor correction value for correcting the dispersion among sensors or correcting differences in the measured value PV from other instruments The actual input value is added to the sensor correction value and then stored in the measured value PV buffer memory For details on the measured value PV refer to Subsection 8 2 3 Initial value 9 aw Description Backup CH1 CH2 CH3 108 148 188 Setting range 5000 to 5000 50 00 to 50 00 of span 1 Input span for internal temperature input Scaling span for internal micro voltage input External input span for external input Example of operation Condition When the input range span is 400 C and correction by 2 C is required Sensor correction value 2 C 400 C x 100 0 5 Display value Displayed value Measured value PV Sensor correction value Measured value PV Correction value 2 C Display value Set value SV Act
67. 0 0 0 to 100 0A CTL 6 P H 0 0 to 30 0A Manufactured by U R D Co Ltd 6 Introduction of Functions FX3U ALC User s Manual 6 11 Heater Disconnection Alarm Function HBA Associated buffer memory BFM No 1 3 Event b9 Heater disconnection alarm Subsection 8 2 2 21 EA EJ 24 Heater current measured value Subsection 8 2 7 53 93 133 173 Heater disconnection alarm set value Subsection 8 2 17 Number of times of heater disconnection alarm delay 1239 Number of times of current error detection when output is OFF delay SUBSECUODD S S 238 CT monitor method switch Subsection 8 2 60 239 CT ratio setting Subsection 8 2 61 Caution Description Reference e Seta value lower than the actual heater current as the heater disconnection alarm set value e When external output is selected in the control mode switch function the heater disconnection alarm function is disabled Heater current measured value is always set to 0 When the set value is 0 the heater disconnection alarm function is turned OFF However when turned OFF it is possible to monitor the heater current measured value 6 11 2 Number of times of heater disconnection alarm delay Set the number of times of delay for detecting heater disconnection alarm or current abnormality while the output is OFF If abnormalities occur exceeding the preset number of times in the heater current measured value or current value while the output is OFF
68. 0 1 AUTO mode and MANUAL Mod cccccsssecccceeeeeeeceeecececeueeeesauseeesseaeeessueseeessuseeesssageeseneas 58 6 10 2 Balance less bump less FUNCTION cccceccceececeeeeteeeeceeeeceeeeeeeeeaneeeaneetaneesaueessneesaneeseneenneesaness 59 6 11 Heater Disconnection Alarm Function HBA 0ccccseeceeceseeeeeeeeeeeeeeeeeesaeeeeesaeeeeesaaeeeesaaneeesaaes 60 6 11 1 Heater disconnection alarm fUfictlOhr 2 hace se eo Dik beue dete panos a a a 60 6 11 2 Number of times of heater disconnection alarm delay cccccccseeeeeeeeeeeeeeaeeeeeeeseeeeeeaeeeeeeeeaes 61 6 12 Loop Breaking Alarm Funcuon LBA 4 eit eda e Aci ag erunt dua ae puntos p Ea Ap 62 6 12 1 Lop breaking alarmi TUNGO iuo eicit eor odis sot read equo olt base c Lacus demos aM ero oe adver 62 6 12 2 Loop breaking alarm dead zone LBD sees 64 7 Alarm 65 ex i cR BILE UU DU TUE 65 R2 JOE UNCON Sastre toasted cess itssienumi ula R T vocation el see coat Ens A 67 72 1 dJpper mat Input value aiarlridszzcau csi udi sceau uiu en eoe aee io scan Exc en aenea Eee ana In erae ese e elec 67 2 2 LOWE mor put Value alaltilsueooi aeu unldaste oed a eu Eee tun eu as RE ttem eR es Ud aa fs 67 1 2 9 NIDDM Inmmib deVISBlIOn eias tui a i orta euer atu hie a LR CAL css M Douce 68 LLA LEowerMmibdeviauon alatis ec etc nq tem tee ode actui t Lise ecc bte Leto eet ee sm eme 68 1 25 J Jppertewerdrat deviabiObl sueco do Loree Nee alae a
69. 13 HOW TO TOSOL all el TOF sies een etta ER eb qu RR Piso mERUR eei dur Dua utate ise esequi dados des duc aa catal c uM e duc oE 142 10 2 Diagnostics on the PLC Main Unit 00 0 0 cceccceseeeeeeeeeeeeeeeeeeesseeseeeseeeeessaeeeeeseeeesseeeeesaeeeeenas 143 10 2 1 POWER POWY LED on flashing oftr iod tee itu tute eod tta ue es 143 10 2 2 BAT T BAW CED ORO Ios euet ditor ode a DP EO DIEN OU Ue coste dU Rete Pap ogee faute eau t od teed neces 143 10 2 3 ERROR ERE EED on fl shirig Off 25 avocats vou MU seda tocco Eodem Do desee boa ere oon te ree 144 Appendix A Version Information 145 Appendix A 1 Version Information uestis axceges dete orte Rv ait Veritas mi dob dscluee liste arcs e a yud iuh stades 145 Appendix A 1 1 Version check method cccccccsseccceeeceeecceeeceueeceueeceueescaeessueecueeceeesseeesaeeesaeessgees 145 Appendix A 1 2 Version upgrade history cccccccsscccssecceececeueeceuceceucecsucecsucessueessaeessueessueessueesasaases 145 Waranty ct M tet 147 Revised HIS tO MeL 148 FX3U 4LC User s Manual Standards Standards Certification of UL cUL standards FX3U 4LC units comply with the UL standards UL cUL UL cUL File number E95239 Regarding the standards that comply with the main unit please refer to either the FX series product catalog or consult with your nearest Mitsubishi product provider Compliance with EC directive CE Marking This document does not guar
70. 2 uoneouieds 200 0 to 200 0 C Input range 0 to 1000 C 0 to 1800 F wasis OO uoneinByuoy Input range uonejejsu x Input type Pao JPt100 Pt1000 Micro voltage input 50 0 to 150 0 C 50 0 to 150 0 C 200 0 to 600 0 C 200 0 to 500 0 C 200 0 to 650 0 C 0 to 10mV 300 0 to 300 0 F 300 0 to 300 0 F 328 to 1184 F 0 to 100mV 300 to 1100 F 300 to 900 F Input range Buu Ol 2 6 Output Specifications o J5 Item Specification ag Number of output points 4 points 5 z Output method NPN open collector transistor output z Rated load voltage 5 to 24V DC Maximum load voltage 30V DC or less T Maximum load current 100mA gt Leak current in OFF status 0 1mA or less ON voltage 1 5V When the maximum load current Control output cycle 0 5 to 100 0 sec w E T D 3 O lt ua O D 3 Bunoouseqnou 21 3 System Configuration FX3U ALC User s Manual 3 1 General Configuration 3 System Configuration 3 1 22 General Configuration FX3G FX3U PLC EEA EET MITSUBISHI MALE wh SSegegesrenenss e Analog Input Up to 8 can be connected analog output FX3U 4LC special function blocks GX Developer USB cable RS 232C cable FX2NC CNV IF or FX3UC 1PS 5V 1 For the maximum number refer to Section 3 2 Component list Part name Model name
71. 213925022 2954900190906005 9 520060804080 30 920 20090500000 coo Pre dos D SM cuc oDoa Pis pue educ 40 6 5 Heaurg cooling PID eobtrols iusti eo ED inset bobus ioe ti eto M eoo tet ia garce leatelidcu esie 41 66 T Heating Cooling FPID CONTO eR mm 41 66 2 Overshoot prevention TUFICIOFEE s esiea tet donee n a aea E a Isa bl uxeus ia 42 6 6 3 Overlap dead band IUellorisss uet Ce Dto a ate b ei lec uu etu a aaa 43 OOA COON IME NETT S c T de pele ri 44 07 Cascade Contool Moe RPM C ladies ala 45 6 7 I Cascade controls io eb cimi eti abundance au eee Eee AA pul d LAN dea 45 6 2 UNING dutimg eascade COLHLFOlzs nire isna a a a unde les ubsep boni autre 47 643 OV Wacking seleccion MMIMCUOM T 48 O26 Auto Tunlpg FUDGCHOD aoss esse eres i ES racene needs edema esas E eens ease ceed ae 49 O20 le CUO FONG cate Bote Eccc ke nh at aan ee oats I M LM LUUD n i cee el aaa 49 6 8 2 Conditions for performing and aborting AT auto tuning cceeeeeeeeeeeeeeeeeeeeeeeeeeeseaeeeeeseaeeeeeeaes 51 6 3 3 AT auto TUNING NAS asra ae matura e a Dncenibxiatuxs EEEE a doctus x DuuS tva eti ted 53 6 9 Start p E ning UMC OM s oed i eset E od b se bea ret ata uda bis the pice eos rude 54 6 9 1 ST AStartup tlbi soe erue a A ei eee 54 6 9 2 Conditions for performing and aborting ST startup tuning sees 56 6 10 AUTO MANUAL mode changeover heces eser o ep en OR eh eeepc a ere aem eb qe db 58 6 1
72. 3UC 32MT LT specification for I O wiring Supplied FX3uc 32MT LT and installation extracted from the FX3uc User s Manual Manual Hardware Manual JY997D12701 Hardware Edition Only Japanese document For details refer to FX3UC Series User s Manual Hardware Edition ae FX3uc Series Additional User s Manual JY997D28701 Describes FXsuc Series PLC specification details 09R519 Manual for I O wiring installation and maintenance Hardware Edition Programming for FX3G FX3u FX3uc Series FX3G F X3U F X3UC Series Additional Programming Manual JY997D16601 Describes FX3G F X3U F X3UC Series PLC 09R517 Manual Basic amp Applied programming for basic applied instructions and devices Instruction Edition Manuals for analog control Additional FX3G FX3U FX3UC Series Details of analog special function block User s Manual JY997D16701 FX3U 4AD FX3U 4DA FX3uc 4AD and 09R619 manne Analog Control Edition analog special adapter FX3u ADP FX3U ALC User s Manual Associated Manuals Model code number Manuals for FX3u 4LC temperature control block Describes installation specifications for the FX3U 4LC temperature control block extracted from the FX3u 4LC User s Manual For details refer to FX3U 4LC User s Manual Supplied FX3U 4LC Manual Installation Manual JY997D38901 Addiiona Wandal User s Manual JY997D39101 This Manual Describes details of the FX3U 4LC
73. 4 BFM 94 BFM 134 BFM 174 AUTO MANUAL mode changeover 86 These buffer memories select AUTO mode or MANUAL mode Write KO to select AUTO mode Write K1 to select MANUAL mode AUTO mode The measured value PV or external input value is compared with the set value SV PID arithmetic operation is performed and then the control output MV is given In AUTO mode the MANUAL output set value becomes equivalent to the control output value MV MANUAL mode The control output MV is given based on the MANUAL output set value For details on the AUTO MANUAL mode changeover refer to Section 6 10 Description Initial n 0 AUTO mode Caution CH1 54 MANUAL mode is not available while heating cooling PID control is being performed e The alarm function is also enabled in MANUAL mode 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 19 BFM 55 BFM 95 BFM 135 BFM 175 MANUAL output set value z To these buffer memories set the output ON ratio in MANUAL mode S Specify the ratio of the ON duration within the time sec specified by the control output cycle setting buffer memories ON duration Control output cycle sec x MANUAL output set value 96 2 For details on the control output cycle setting refer to Subsection 8 2 34 D niga Description s Backup CH2 value 2 175 Setting range 50 to 1050 5 0 to 105 096 50 RW 1 These buffer
74. 9 BFM 109 BFM 149 BFM 189 Adjustment sensitivity dead zone setting 97 8 2 34 BFM 70 BFM 1 10 BFM 150 BFM 190 Control output cycle setting Heating control output period setting ccccccsessceseeseeceeseccessececsecesseeeeeseesessseeeseeeensueeensegs 98 8 2 35 BFM 71 BFM 111 BFM 151 BFM 191 Cooling control output period setting 98 8 2 36 BFM 72 BFM 112 BFM 152 BFM 192 Primary delay digital filter setting 99 8 2 37 BFM 73 BFM 113 BFM 153 BFM 193 Setting change ratio limiter 100 8 2 38 BFM 74 BFM 114 BFM 154 BFM 194 AT auto tuning bias 101 8 2 39 BFM 75 BFM 1 15 BFM 155 BFM 195 Normal reverse operation selection 102 8 2 40 BFM 76 BFM 116 BFM 156 BFM 1 96 Setting limiter upper limit 103 8 2 41 BFM 77 BFM 117 BFM 157 BFM 197 Setting limiter lower limit 103 8 2 42 BFM 78 BFM 118 BFM 158 BFM 198 Loop breaking alarm judgement time 104 8 2 43 BFM 79 BFM 119 BFM 159 BFM 199 Loop breaking alarm dead zone 105 8 2 44 BFM 80 BFM 120 BFM 160 BFM 200 Micro voltage input scaling upper limit 106 8 2 45 BFM 81 BFM 121 BFM 161 BFM 201 Micro voltage input scaling lower limit 106 8
75. ANUAL mode AUTO mode 1 2 3 1 The mode is changed over from AUTO mode to MANUAL mode However the control output value MV follows the control output value MV in the AUTO mode 2 The control output value MV is manually changed 3 Operation performed when the mode is changed over from AUTO mode to MANUAL mode The control output value MV becomes a value automatically calculated based on the set value SV Associated buffer memory Description Reference CH1 Subsection 8 2 2 Subsection 8 2 18 Subsection 8 2 19 54 55 59 UORONpoJu uoneogoeds INQ wasis QJ uoneJn amp ijuo uonejejsu x 5 E welbag CO Kioweyjseyng OO sojdwex Bunoouseqnou CO 6 Introduction of Functions FX3U 4LC User s Manual 6 11 Heater Disconnection Alarm Function HBA 6 11 Heater Disconnection Alarm Function HBA 6 11 1 Heater disconnection alarm function 60 The heater disconnection alarm function detects the current flowing in the load using a current detector CT it compares the detected value heater current measured value with the current value set for heater disconnection alarm and issues an alarm when the measured value is more than or less than the current set value for the heater disconnection alarm The heater current measured value can be measured using buffer memories By setting the number of times of
76. CO 19 2 Specification FX3U ALC User s Manual 2 4 Input Specifications 2 4 Measurement precision The measurement precision is as shown below The measurement precision of the thermocouple does not include the cold contact temperature compensation error For the cold contact temperature compensation error refer to Subsection 2 4 1 Digits below the minimum resolution shown in the measurement precision below of the input value are rounded up 1 When ambient temperature is 25 C 5 C Input type Input range Less than 100 C 100 C to less than 500 C 500 C or more Less than 1000 C 1000 C or more Measurement precision 3 0 C 1 digit 1 5 C 1 digit 0 3 of input value 1digit 3 0 C 1 digit 0 3 of input value 1digit K J E T PLII U L R S N W5Re W26Re Less than 400 C 70 C 1digit 400 C to less than 1000 C 3 C 1digit 1000 C or more 0 3 of input value 1 digit Less than 200 C 0 6 C 1 digit Pt100 JPt100 Pt1000 200 C or more 0 3 of input value 1 digit Micro voltage input 0 3 of span 1digit UJ 2 When ambient temperature is 0 to 55 C Input type Input range Measurement precision Less than 100 C 7 0 C 1digit K J E T PLII U L 100 C to less than 500 C 3 5 C 1digit 500 C or more Less than 1000 C 1000 C or more Less than 400 C B 400 C to less than 1000 C 1000 C or more Less than 200 C 200 C or more 0 7 of input value 41di
77. Changes for the Better a MITSUBISHI PROGRAMMABLE CONTROLLERS MEUS EC FX3U 4LC USER S M GENE S2cty Precautions NN NND Read these precautions before using Before installation operation maintenance or inspection of this product thoroughly read through and understand this manual and the associated manuals Also take care to handle the module properly and safely This manual classifies the safety precautions into two categories gt DANGER and ACAUTION Q DAN G E R Indicates that incorrect handling may cause hazardous conditions resulting in death or severe injury Indicates that incorrect handling may cause hazardous conditions resulting in medium or slight CAU TIO N personal injury or physical damage Depending on the circumstances procedures indicated by may also cause severe injury It is important to follow all precautions for personal safety Store this manual in a safe place so that it can be taken out and read whenever necessary Always forward it to the end user 1 DESIGN PRECAUTIONS Q DANGER peterenies Make sure to include the following safety circuits outside the PLC to ensure safe system operation even during external power supply problems or PLC failure Otherwise malfunctions may cause serious accidents 1 Above all the following components should be included an emergency stop circuit a protection circuit an interlock circuit for opposite movements such as normal vs revers
78. K KKK d XX KKK KKK KX SO SOO SON Oe ON OO OO Oe SE NO OO ae i RRRA 9O O ANEI IOO OOo O SESS B ROIS RN E ei ee dde eU ues Dead zone N SONGS o Set value SV SSO Gees Dead zone LLELE S Time mcs MEM N Non alarm status Alarm status 71 A uononpoJu uoneogoeds INQ wasis QJ uoneJn6iuo uonejejsu x Buum Ol o suojoun J jo uononpoau UJ 3 D O 2 E 3 Q 3 3 So duJex4 Bunoouseqnou CO 7 Alarm FX3U 4LC User s Manual 7 4 Number of Times of Alarm Delay 7 4 Number of Times of Alarm Delay In BFM 234 set the number of alarm delays This setting is applied to all alarms 1 to 4 The alarm delay function keeps the non alarm status until the number of input samples exceeds the number of alarm delays after the deviation between the measured value PV and the set value SV reaches the alarm set value If the deviation remains in the alarm range until the number of input samples exceeds the number of alarm delays an alarm is issued For details on the alarm delay count refer to Subsection 8 2 56 Measured value PV Measured value PV Alarm set value Set value SV Time l Input sampling I I 1 3 times 5 times Non alarm status Alarm status 72 8 Buffer Memory FX3U 4LC User s Manual 8 1 Buffer Memory List 8 Buffer Memory j Each setting and alarm in the 4L C is written from
79. Non alarm status Al tat arm status ER Alarm status 113 UOnOnpoJjU uoneogoeds INQ wasis GO uoneinByuoy uonejejsu x Buum Ol o suonoun jo uononpoau 7 c 3 uei CO Kiowayy yng So duJex4 Bunoouseqnou CO 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details Example of operation 3 Upper lower limit deviation Measured value PV Measured value PV Alarm set value Prz RHONE AIRE RNK NIRE NENNEN R Reo oP OHI NS e e e Dead zone Set value SV xx Dead zone Time Alarm status NM a Non alarm status Alarm status Caution Handling numbers containing decimal places The set value should be the actual value multiplied by 10 8 2 56 BFM 234 Alarm delay count To this buffer memory set the number of times of alarm delay for alarms 1 to 4 The setting is applied to alarms 1 to 4 in all channels The alarm delay function keeps the non alarm status until the number of times of input sampling exceeds the preset number of times of alarm delay after the deviation between the measured value PV and the set value SV reaches the alarm set value If the deviation remains in the alarm range until the number of times of input sampling exceeds the number of times of alarm delay an alarm is issued The input sampling period is 0 25 sec for the number of times of alarm delay For details on the alarm function refer to Chapter 7 For
80. Normally OFF CH1 heating control output Normally OFF Normally OFF CH1 cooling control output Normally OFF Normally OFF CH3 heating control output Normally OFF Normally OFF CH1 heating control output CH1 cooling control output CH1 heating control output CH2 heating control output CH3 heating control output CH4 heating control output CH1 cooling control output CH2 cooling control output CH3 cooling control output CH4 cooling control output CH1 alarm 1 state CH2 alarm 1 state CH3 alarm 1 state CH4 alarm 1 state CH1 alarm 2 state OUT2 OUT3 CH3 control output CH3 alarm 4 state CH3 heating control output CH1 loop breaking alarm state CH1 control output CH1 alarm 2 state CH1 heating control output CH2 control output CH2 alarm 2 state CH1 cooling control output OUT3 CH3 control output CH3 alarm 2 state CH3 heating control output OUT4 CH4 control output CH4 alarm 2 state CH3 cooling control output OUT1 CH1 control output CH1 alarm 3 state CH1 heating control output CH1 cooling control output CH1 heating control output CH1 cooling control output CH2 alarm 2 state CH3 alarm 2 state CH4 alarm 2 state CH1 alarm 3 state CH2 alarm 3 state CH3 alarm 3 state CH4 alarm 3 state CH1 alarm 4 state CH2 alarm 4 state CH3 alarm 4 state CH4 alarm 4 state Normally OFF OUT4 CH4 control output CH4 alarm 4 state CH3 cooling control output OUT1 OUT2 CH1 control output am oranes CH2 loop breaking alarm stat
81. OFF when the cascade control function is changed from ON to OFF Automatically measures calculates and sets optimal PID constants for the preset temperature Changes the auto tuning set value SV Set to prevent the measured value PV from exceeding the set value SV when performing auto tuning Cooling method Cascade control SV tracking selection function Auto tuning function AT Auto tuning bias Automatically calculates and sets PID constants based on the response Startup tuning function characteristics of the control target when control is started or when the set value SV is changed Switches the mode between the AUTO mode in which the control output value MV is automatically calculated based on the set value SV and the MANUAL mode in which the control output value MV is set arbitrarily and manually AUTO mode MANUAL mode Prevents overload caused by drastic change in the control output MV when the mode is changed over between the AUTO mode and the MANUAL mode Detects the current flowing using the current detector CT and detects heater disconnection Number of times of heater disconnection Sets the continuous number of times of detecting a heater disconnection or alarm delay detecting abnormal current while the output is OFF to be judged as an alarm Loop breaking alarm function Detects abnormalities in the control target input sensors etc Sets the area to be excluded from the loop b
82. ON Power failure occurs AT ST abnormal end flag does not turn ON The cascade control ON OFF function is set to 1 Cascade ON Startup tuning is not finished in approximately 100 minutes The AT execution command buffer memory is set to 1 Performs AT The AT ST abnormality flag does not turn ON 6 Introduction of Functions FX3U ALC User s Manual 6 9 Startup Tuning Function A The output saturation time Time when the output value has stopped at output limiter upper limit or output 5 limiter lower limit is short g al e Hardware error is detected o Sum check error caused by 24V DC power supply error or adjustment data error Cold contact temperature compensation data error 2 A D converter error t Associated buffer memory e e je BFM No CE si escription ererence Flag b2 24V DC power supply error 3 HO b4 to b7 AT ST abnormal end flag Subsection 8 2 1 b8 Adjustment data error 2 b9 Cold contact temperature compensation data error 3 b10 A D converted value error Event bO Input error upper limit 1 2 3 44 b1 Input error lower limit Subsection 8 2 2 b11 ST startup tuning being performed b14 AT auto tuning being performed 61 101 141 181 Derivative time D Subsection 8 2 25 65 105 145 185 Output limiter lower limit Subsection 8 2 29 208 214 220 226 Input type Subsection 8 2 52 244 245 Cascade ON OFF Subsection 8 2 64 uone
83. P alarm is issued nput range 7 2 1 wrY When measured value PV is less than alarm set value an alarm Subsection 2 Lower limit input value alarm jedsstied Input range 722 Buum OW o ai C 5 3 seer imikdeviationc isan When deviation Measured value PV Set value SV is more S Span Subsection a KE than alarm set value an alarm is issued Span to Span 7 2 3 a 4 Wer IERIE VIGOa EEG When deviation Measured value PV Set value SV is less S span Subsection 9 than alarm set value an alarm is issued Spana topan 7 2 4 5 Usb rllowerlimitdevialion When absolute deviation Measured value PV Set value Susa Subsection PP SV is more than alarm set value an alarm is issued fo topan 7 2 5 amp lance alan When absolute deviation Measured value PV Set value D tosta Subsection g SV is less than alarm set value an alarm is issued fo Span 7 2 6 When measured value PV is more than alarm set value an Upper limit input value alarm nae Subsection 7 With wait alarm is issued Input range 727 However when control is started the measured value is ignored in When measured value PV is less than alarm set value an alarm 8 Lower limit input value alarm Subsection 8 i is issued Input range with wait P 7 2 1 les However when control is started the measured value is ignored D Upper limit deviation value When deviation Measured value PV Set value SV is m
84. PLC before attaching or detaching the following devices Failure to do so may cause device failures or malfunctions Peripheral devices display modules expansion boards and special adapters O extension units blocks FX Series terminal block and the special function units blocks Battery and memory cassette 24 24 Oo WIRING PRECAUTIONS DANGER ae Make sure to cut off all phases of the power supply externally before attempting wiring work 27 Failure to do so may cause electric shock NCAUTION Connect the AC power supply to the dedicated terminals specified in this manual If an AC power supply is connected to a DC input output terminal or DC power supply terminal the PLC will burn out Do not wire vacant terminals externally Doing so may damage the product e Use class D grounding grounding resistance of 100 or less with a wire of 2mm or thicker on the grounding terminal of the PLC However do not connect the ground terminal at the same point as a heavy electrical system When drilling screw holes or wiring make sure cutting or wire debris does not enter the ventilation slits Failure to do so may cause fire equipment failures or malfunctions e Make sure to observe the following precautions in order to prevent malfunctions under the influence of noise Do not bundle the power line or twisted shielded cable together with or lay it close to the main circuit high voltage line or load line Otherw
85. PV Set value 14 Upper lower limit deviation SV is more than alarm set value an alarm is issued 2 Subsection value alarm with re wait However when control is started and when set value is changed 0 to Span 7 2 8 the measured value is ignored 1 Input range for internal temperature input Scaling range for internal micro voltage input External input range for external input 2 Input span for internal temperature input Scaling span for internal micro voltage input External input span for external input 66 7 Alarm FX3U ALC User s Manual 7 2 Alarm Functions 7 2 Alarm Functions si S The alarm functions issue an alarm when the measured value PV or deviation Measured value PV Set value SV reaches the alarm set value The alarm status can be checked in the status of bits for alarms 1 to 4 of the event buffer memory 2 For settings of alarm functions refer to the following m For details on the event refer to Subsection 8 2 2 g For details on the measured value PV refer to Subsection 8 2 3 2 For details on the set value SV refer to Subsection 8 2 15 9 For details on the alarm setting value refer to Subsection 8 2 16 For details on the alarm mode setting refer to Subsection 8 2 53 Caution wasis QJ n cascade control the alarm waiting operation is disabled on the slave channel side when the set value SV is changed When the setting change ratio limiter is set
86. Q wasis OO uoneJn6iuo uonejejsu x Buum Ol o suojoun J jo uononpoau wey Ni welbog QO AouejJeyng OO sojdwex 3 Bunoouseqnou CO 1 Introduction FX3U ALC User s Manual 1 3 Terminal Layout 1 3 Terminal Layout PTB TC COM PTB TC COM OUT 1 OUT2 PTB TC COM PTB TC COM OUT3 OUT4 1 4 Power and Status LEDs LED display Color Status Description Power is not being supplied from the internal power supply 5V DC Power is being supplied from the internal power supply 5V DC Power is not being supplied from the external power supply 24V DC POWER Green 24V Power is being supplied from the external power supply 24V DC Gum OUT1 output OFF N OUT1 output ON OFF OUT2 output OFF T a p OUT2 output ON OFF OUT3 output OFF m pres LA p OUT3 output ON OFF OUT4 output OFF UTI OFF p OUTA output ON 16 2 Specification FX3U 4LC User s Manual A 5 e Q Q c 2 o 2 2 Specification DESIGN PRECAUTIONS Q DANGER e Make sure to include the following safety circuits outside the PLC to ensure safe system operation even during external power supply problems or PLC failure Otherwise malfunctions may cause serious accidents 1 Above all the following components should be included an emergency stop circuit a protection circuit an interlock circuit for opposite movements such as normal vs
87. Radiated Emissions Conducted Emissions EMS e Radiated electromagnetic field Fast Transient burst Electrostatic discharge High energy surge Voltage drops and interruptions Conducted RF Power frequency magnetic field EN61131 2 2007 Programmable controllers Equipment requirements and tests FX3U 4LC User s Manual Standards Caution to conform with EC Directives The FX3U A4LC have been found to be compliant to the European standards in the aforesaid manual and directive However for the very best performance from what are in fact delicate measuring and controlled output device Mitsubishi Electric would like to make the following points As analog devices are sensitive by nature their use should be considered carefully For users of proprietary cables integral with sensors or actuators these users should follow those manufacturers installation requirements Mitsubishi Electric recommend that shielded cables should be used If NO other EMC protection is provided then users may experience temporary loss or accuracy between 10 in very heavy industrial areas However Mitsubishi Electric suggest that if adequate EMC precautions are followed for the users complete control system users should expect accuracy as specified in this manual e Sensitive analog cable should not be laid in the same trunking or cable conduit as high voltage cabling Where possible users should run analog cables separately Good cable shielding should be used
88. Remarks An FX2NC CNV IF or FX3UC 1PS 5V is necessary to connect the 4LC with the FX3UC PLC PLC FX3G FX3U FX3UC PLC Special function block used for control using external inputs outputs l l For connectable equipment refer to the following manual The special function block for FX3U 4AD FX3U 4DA etc corresponding to the connected PLC pi an analog input output Refer to FX3G Hardware Edition Refer to FX3u Hardware Edition Refer to FX3uc Hardware Edition PC software GX Developer PLC programming software Temperature control block FX3U 4LC PC USB cable FX USB AW Cable with RS 422 USB converter between a FX PLC and PC F2 232CAB 1 RS 232C cable FX 232AWC H PC connection cable and interface FX 422CABO 3 System Configuration FX3U ALC User s Manual 3 2 Applicable PLC 3 2 Applicable PLC Model name Applicability Ver 1 00 and later Up to 8 blocks can be connected Ver 2 20 and later Up to 8 blocks can be connected Ver 2 20 and later Up to 8 blocks can be connected 2 FX3G Series PLC FX3U Series PLC FX3UC Series PLC The version number can be checked by reading the last three digits of device D8001 1 An FX2NC CNV IF or FX3UC 1PS 5V is necessary to connect the 4LC with the FX3uc PLC 2 Upto 7 units can be connected to the FX3uc 32MT LT 2 PLC 3 3 Connection with PLC The 4LC connects with a PLC via an extension cable The 4LC is handled as a special extension block of th
89. ST abnormal end flag does not turn ON The cascade control ON OFF function is set to 1 Cascade ON The cooling method setting is changed Auto tuning is not finished in approximately 2 hours Hardware error is detected Sum check error caused by 24V DC power supply error or adjustment data error Cold contact temperature compensation data error A D converter error 51 UOnOnpoJjU uoneogoeds INQ wasis QJ uoneJn6ijuo uonejejsu x 5 E welbag CO Kioweyjseyng OO sojdwex Bunoouseqnou CO 6 Introduction of Functions FX3U ALC User s Manual 6 8 Auto Tuning Function Associated buffer memory BFM No Description Reference Flag b2 24V DC power supply error HO b4 to b7 AT ST abnormal end flag Subsection 8 2 1 b9 Cold contact temperature compensation data error b10 A D converted value error Event A ae eb sii o pub omer upper IT Subsection 8 2 2 b1 Input error lower limit b14 AT auto tuning being performed Measured value PV Subsection 8 2 3 29 Control start stop changeover Subsection 8 2 9 48 128 168 Set value SV Subsection 8 2 15 61 101 141 181 Derivative time D Subsection 8 2 25 65 105 145 185 eee limiter lower limit Subsection 8 2 29 67 Output change ratio limiter eee ratio limiter Subsection 8 2 31 244 245 Cascade ON OFF Subsection 8 2 64 254 Set value backup command Subsection 8 2 70 b8 Adjustmen
90. actually judged in a upper range portion and lower range portion of 9 the set value SV Practically the actual range width is doubled If the temperature rise completion range value is set to 10 C 10 C above the set value and 10 C below the set value are treated as the temperature Sg rise completion range width of 20 C in total 3 Bunoouseqnou CO 115 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 59 BFM 237 Temperature rise completion soak time 116 To this buffer memory set the temperature rise completion soak time The setting is applied to all channels When the measured value PV remains in the temperature rise completion range until the temperature rise completion soak time is finished the temperature rise completion flag b15 of the event buffer memory turns ON For details on the event refer to Subsection 8 2 2 For details on the temperature rise completion range refer to Subsection 8 2 58 Description Initial vallis 237 Setting range 0 to 3600 sec 0 RW Example of operation 1 When the temperature rise completion soak time is set to any positive value Backup CH1 Measured value PV Temperature rise Set value SV D Temperature rise completion soak time ON Temperature rise completed flag OFF Example of operation 2 When the temperature rise completion soak time is set to 0 Measured value PV l Temp
91. acy differs depending on the type of input and the input range For specification details refer to Subsection 2 4 2 wasis OO When ambient temperature is 25 C 5 C uoneinByuoy Measurement precision Measurement accuracy differs depending on the type of input and the input range For specification details refer to Subsection 2 4 2 Within 1 0 C When ambient temperature is 0 to 55 C Cold contact temperature compensation error However within 2 0 C while input value is 150 to 100 C within 3 0 C while input value is 200 to 150 C 0 1 C 0 1 F 1 C 1 F 0 5uV or 5 0uV Varies depending on input range of used sensors When ambient temperature is 0 to 55 C uonejejsu x Resolution Sampling period 250ms 4ch Effect of external resistance When thermocouple is used Approx 0 125n V Q Buum Ol Approx 0 03 of full scale 3 wire type Effect of input lead wire resistance 10 or less per 1 wire When resistance thermometer is used Saute Approx 0 04 Q of full scale 7 5 or less per 1 wire 6 Input impedance 1M Q or more m Sensor current Approx 0 25mA When resistance thermometer is used S PE is Operation when input is disconnected Upscale 96 gt amp Operation when input is short circuited Downscale When resistance thermometer is used 2 1 Adifferent input can be selected for each channel wey N welbog QO AouejJeyng OO sojdwex 3 Bunoousejqnou
92. alarm 4 are available in each 2 channel in accordance with the application g Set the alarm type by writing the alarm mode 0 to 14 to the alarm mode setting buffer memories for alarms 1 to 4 each channel Values of alarms 1 to 4 can be set using the alarm set value buffer memories and the alarm status can be checked in the status of alarm bits b4 to b7 for alarms 1 to 4 of the event buffer memory The alarm dead zone and number of times of alarm delay can be set for the alarm function By setting the alarm dead zone it is possible to prevent repetition of alarm status and non alarm status By setting the number of times of alarm delay alarm can be issued when the number of times of input sampling exceeds the preset number of times of alarm delay For details on the event refer to Subsection 8 2 2 For details on the alarm setting value refer to Subsection 8 2 16 For details on the alarm mode setting refer to Subsection 8 2 53 For details on the alarm dead zone setting refer to Section 7 3 or Subsection 8 2 55 For details on the number of times of alarm delay refer to Section 7 4 or Subsection 8 2 56 ues s QO uoneJn6ijuo uonejejsu x 7 1 Alarm List The list below shows alarms provided in the 4LC For details on the alarm refer to Section 7 2 0 Alarm function OFF Alarm function is disabled MEE 1 esed eaan When measured value PV is more than alarm set value an Subsection PP
93. and CH2 and group 2 CH3 and CH4 The setting for control group 1 GR1 is applied to both CH1 and CH2 The setting for control group 2 GR2 is applied to both CH3 and CH4 For details on the control mode refer to Section 6 2 Ue Initial re me mim 24 1 Setting range 0 to 7 Refer to the following 0 RW 1 These buffer memories can be written only while control is stopped Control mode Control mode Control type Input Output Internal o PID control dtemal Internal Two position control Manual control Cascade control External Heating cooling PID Internal control Two position control External e When internal input is selected The 4LC performs control using measured values detected through inputs built into the 4L C N Oy Ol BY GW N gt e When external input is selected The 4LC performs control using values stored in the external input value buffer memories BFM 25 to BFM 28 without using inputs built into the 4LC When internal output is selected The 4LC performs control using transistor outputs built into the 4L C However in heating cooling PID control the control output of CH2 and CH4 should use an external output e When external output is selected The 4LC performs control using values stored in the external output value monitor heating external output value monitor buffer memories BFM 32 to BFM 35 and cooling external output value monitor buffer memories BFM 36 to BFM 39 withou
94. antee that a mechanical system including this product will comply with the following standards Compliance to EMC directive and LVD directive for the entire mechanical module should be checked by the user manufacturer For more information please consult with your nearest Mitsubishi product provider Regarding the standards that comply with the main unit please refer to either the FX series product catalog or consult with your nearest Mitsubishi product provider Requirement for Compliance with EMC directive The following products have shown compliance through direct testing of the identified standards below and design analysis through the creation of a technical construction file to the European Directive for Electromagnetic Compatibility 2004 108 EC when used as directed by the appropriate documentation Attention his product is designed for use in industrial applications Note Manufactured by Mitsubishi Electric Corporation 2 7 3 Marunouchi Chiyoda ku Tokyo 100 8310 Japan e Manufactured at Mitsubishi Electric Corporation Himeji Works 840 Chiyoda machi Himeji Hyogo 670 8677 Japan Authorized Representative in the European Community Mitsubishi Electric Europe B V Gothaer Str 8 40880 Ratingen Germany Type Programmable Controller Open Type Equipment Models MELSEC FX3uU series manufactured from December 1st 2009 FX3U ALC Standard Remark Compliance with all relevant aspects of the standard EMI
95. applied For details on the setting limiter upper limit refer to Subsection 8 2 40 For details on the setting limiter lower limit refer to Subsection 8 2 41 Operation when auto tuning is performed If auto tuning is performed while the setting change ratio limiter is applied auto tuning is started after the operation involving the setting change ratio limiter is finished If the AT bias is set auto tuning is started after the AT point is reached Caution e Handling numbers containing decimal places The set value should be the actual value multiplied by 10 e f any value other than 0 is entered the alarm waiting operation is invalid when the set value SV is changed e f O0 is entered the setting change ratio limiter is invalid and the set value immediately changes e Ifthe value of the setting change ratio limiter is changed while the setting change ratio limiter is applied the rate of change is calculated again and operation is continued using the new calculated rate of change 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 38 BFM 74 BFM 114 BFM 154 BFM 194 AT auto tuning bias 2 To these buffer memories enter the AT bias to prevent the measured value PV from exceeding the set S value SV during auto tuning The auto tuning function performs two position control using the set value SV hunts the measured value PV then calculates and sets each PID constant However for
96. asis OO uoneJn6ijuo uonejejsu x Buu Ol o suojoun J jo uononpoau wey N welbog QO Kioweyjseyng OO m gt lt amp 3 ze D o 10 Troubleshooting FX3U ALC User s Manual 10 1 Troubleshooting Procedure 10 1 Troubleshooting Procedure The flag BFM 0 and event BFM 1 to BFM 4 buffer memories store errors detected in the 4LC You can check the contents of errors by monitoring the buffer memories using peripheral equipment or reading the contents of the buffer memories using the FROM instruction or direct specification of buffer memories Flag BFM 0 The following bits of the flag buffer memory BFM 0 indicate errors Bit Description Cause of error bO Error present Turns ON when an error among b1 to b10 below has occurred Turns ON when data outside set range is written b1 Set value range error The buffer memory number in which an error has been generated is stored in a set value range error address BFM 252 b2 24V DC power supply error Turns ON when driving power supply 24V DC is not supplied Turns ON when an error has been caused by noise or when a failure has occurred in the 4L C Turn the power ON again and check for changes in the state If no improvement is obtained consult a Mitsubishi Electric distributor b3 Set value backup error flag Turns ON when CH1 AT auto tuning or ST startup tuning abnormally b4 CH1 AT ST abnormal end flag sands Turns ON when CH2 AT aut
97. been avoided if functions or structures judged as necessary in the legal safety measures the user s device is subject to or as necessary by industry standards had been provided d Failure that could have been avoided if consumable parts battery backlight fuse etc designated in the instruction manual had been correctly serviced or replaced e Relay failure or output contact failure caused by usage beyond the specified Life of contact cycles f Failure caused by external irresistible forces such as fires or abnormal voltages and failure caused by force majeure such as earthquakes lightning wind and water damage g Failure caused by reasons unpredictable by scientific technology standards at time of shipment from Mitsubishi h Any other failure found not to be the responsibility of Mitsubishi or that admitted not to be so by the user 2 Onerous repair term after discontinuation of production 1 Mitsubishi shall accept onerous product repairs for seven 7 years after production of the product is discontinued Discontinuation of production shall be notified with Mitsubishi Technical Bulletins etc 2 Product supply including repair parts is not available after production is discontinued Overseas service Overseas repairs shall be accepted by Mitsubishi s local overseas FA Center Note that the repair conditions at each FA Center may differ Exclusion of loss in opportunity and secondary loss from warran
98. ber of transfer points Buffer memory No Transfer source UJ c s D 3 o lt s jdwex4 ueJ60Jg Bunoouseqnou CO 127 9 Program Examples FX3U 4LC User s Manual 9 1 Reading Writing Buffer Memory 2 How to read and write the bit information such as flag and event 1 Direct specification of buffer memory Specify the buffer memory directly as the source in applied instructions and read or write the contents UL AG is substituted with a number Unit No 0 to 7 E E Buffer memory No 0 to 255 a Reading and transferring the bit information to auxiliary relays In the program below the contents of the buffer memory BFM ZO in the unit No 1 are read and transferred to auxiliary relays M40 to M55 Read command FNC 12 LL UNGO K4M40 Unit No e tL Transfer result Buffer memory No M40 M41 M55 b Reading and transferring the bit information to data registers In the program below the contents of the buffer memory BFM 0 in the unit No 1 are read and transferred to a data register D200 The read bit information is used in bit specification of word devices Read command eT U1 G0 D200 Unit No 1 L Transfer result Buffer memory No D200 0 D200 1 D200 F 128 9 Program Examples FX3U 4LC User s Manual 9 1 Reading Writing Buffer Memory c Writing the bit information of auxiliary relays to the buffer memory 5 In the program below the ON OFF status of au
99. bility is improved in the overlap area where the temperature change caused by outputs is small due to trade off between two outputs Sg For setting the overlap area set a negative value to the overlap dead band buffer memory S Operation example 1 When the overlap area is set Cooling 3 proportional L band s Control output value MV uoneJn amp ijuo 100 uonejejsu x Heating output value Cooling output value Measured 0 value PV 5 E Set value SV Overlap Dead band The dead band is located between the proportional band on the heating side and the proportional band on the cooling side Both the control output on the heating side and the control output on the cooling side are not output when the measured value PV is located in the dead band As a result the energy saving effect is given For setting the dead band set a positive value to the overlap dead band buffer memory Operation example 2 When the dead band is set Control output value MV Heating Cooling proportional proportional band band 8 100 e D S Heating output value Cooling output value E Measured my value PV Sg Set value SV 3 Bunoouseqnou CO 43 6 Introduction of Functions FX3U 4LC User s Manual 6 6 Heating cooling PID control 6 6 4 Associated buffer memory Description Reference 58 138 178 Proportional band P Heating proportional band P Subsection 8 2 22 59 139 179
100. bnormality targets Abnormality in control target Heater disconnection short circuit lack of power supply wiring mistake etc e Abnormality in sensor Sensor disconnection short circuit etc e Abnormality in operating machine Molten relay wiring mistake etc Abnormality in output circuit Molten relay inside instrument etc e Abnormality in input circuit No change in the measured value PV even after input has changed Associated buffer memory BFM No Description Reference 1 4 Event b8 Loop breaking alarm Subsection 8 2 2 5 Measured value PV Subsection 8 2 3 64 104 144 184 Output limiter upper limit Heating upper output limiter setting Subsection 8 2 28 65 105 145 185 Output limiter lower limit Subsection 8 2 29 78 118 158 198 Loop breaking alarm judgement time Subsection 8 2 42 79 119 159 199 Loop breaking alarm dead zone Subsection 8 2 43 6 Introduction of Functions FX3U 4LC User s Manual 6 12 Loop Breaking Alarm Function LBA Caution The loop breaking alarm function judges abnormalities in the control loop but cannot detect positions in which abnormalities occur Check each part of the control system in turn When the AT auto tuning function is completed the loop breaking alarm judgement time is automatically set to the integral time result multiplied by 2 Set the time in which the measured increments changes by 2 0 C or 0 2 of the span
101. continues for a long time the PID arithmetic operation result exceeds the effective range of wasis QJ uoneinByuoy the control output At this time even if the deviation becomes smaller it takes some time until the output comes within the effective range because of the integral operation As a result execution of an actual correction operation is delayed and overshoot undershoot occurs In order to prevent overshoot the 4LC is equipped with the RFB reset feedback limiter function The RFB limiter function feeds back the excessive quantity to the integral value and makes the arithmetic operation result be held at the limit point when the PID arithmetic operation result exceeds the limit point uonejejsu x upper lower limit of the output limiter so that the PID arithmetic operation result always remains inside the effective range Accordingly when a deviation becomes small the correction operation is immediately performed The RFB limiter function is automatically activated while PID control is performed and does not require setting Operation When the RFB limiter function is not provided Control output Temperature Set value SV Output limiter upper limit Output limiter lower limit Large overshoot 5 E When the RFB limiter function is provided Control output d Temperature Set value SV The excessive quantity above the output limiter upper limit is fed back to the inte
102. control Cascade control Control method Control operation period 250ms 4ch Set temperature range Equivalent to input range Refer to Subsection 8 2 52 Alarm is detected by buffer memory Variable within range from 0 0 to 100 0A 0 Not used 1 Monitor Operation mode 2 Monitor Alarm 3 Monitor Alarm Control Selected by buffer memory Heater disconnection detection Adjustment data check input value check watch dog timer check When abnormality is detected transistor output turns OFF Memory Built in EEPROM Number of times of overwrite 100 000 times The photocoupler is used to insulate the analog input area from the PLC e The DC DC converter is used to insulate the power supply from the analog inputs e Channels are insulated from each other Self diagnosis function Insulation method 8 points Number Of 1O GecupIZA Rolls Taken from either the input or output points of the PLC 18 2 Specification FX3U ALC User s Manual 2 4 Input Specifications A 2 4 Input Specifications e Q Q c za o 2 2 4 1 Temperature input specifications Item Specification Number of input points 4 points A K J R S E T B N JIS C 1602 1995 P PLII W5Re W26Re U L 3 wire Pt100 JIS C 1604 1997 1 Input type Resistance thermometer 3 wire JPt100 JIS C 1604 1981 2 wire or 3 wire Pt1000 JIS C 1604 1997 uoneouieds Micro voltage input Measurement accur
103. d used Transistor output status 3107 Notused Arithmetic operation result in proportion to time 13 Cooling side transistor Heating side transistor status output status Cooling side output Heating side output 2 4 Arithmetic operation result Arithmetic operation result in proportion to time in proportion to time BFM 17 BFM 18 BFM 19 BFM 20 4to5 Cooling side transistor Heating side transistor output status output status Heating cooling Cooling side output PID control ina si j Arithmetic operation result necting SIUS MANSION output status in proportion to time iud Heati id tput Cooling side transistor Paik A Arithmetic operation result output status in proportion to time Cooling side transistor Heating side transistor 3 to 7 output status output status For details on the control mode switch refer to Subsection 8 2 62 For details on the transistor output selection function refer to Section 6 3 Caution Bits other than bits O and 8 are always 0 OFF 81 Bunoouseqnou CO uoneJn6ijuo suojoun J jo uononpoau So duJex4 A uononpoJu uoneogoeds INQ wasis OO uonejejsu x Buu Ol o 7 c 3 welbag CO Kiowayy sayjng 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 7 BFM 21 to 24 Heater current measured value These buffer memories store the heater current measured value entered from the current detector CT
104. de control is enabled only when PID control is selected Cascade control is also enabled also in the MANUAL mode Auto tuning and startup tuning are disabled while cascade control is being performed The alarm waiting operation is disabled on the slave channel side when the set value SV is changed 46 6 Introduction of Functions FX3U ALC User s Manual 6 7 Cascade control 6 7 2 Tuning during cascade control z Auto tuning and startup tuning are disabled while cascade control is being performed S Perform tuning in advance while cascade control is OFF and then set PID constants regarded as approximate values Perform tuning respectively for each channel and stop control of the channel where tuning is not performed 2 by setting the operation mode to 0 Unused 1 Monitor or 2 Monitor Alarm D Example of tuning procedure E 1 Turn ON control of only the slave channel perform auto tuning and obtain PID constants for the slave channel Set the operation mode of the master channel to 1 Monitor or 2 Monitor Alarm and the control output should only be wired to a slave channel Point wasis GO When both the master channel and the slave channel mainly perform PID control in cascade control the integral operation is performed in each channel the low frequency gain increases too much and an oscillating low frequency response may occur Accordingly it is generally recommended to avoid the above phenome
105. e CH3 loop breaking alarm state CH4 loop breaking alarm state CH1 heating control output Normally OFF Normally OFF Normally OFF 1 When selecting the control mode 4 or 5 use external output for CH2 and CH4 Caution It is not possible to change the setting while control is being performed If the setting is changed while control is being performed the contents of setting are reflected when control is stopped 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 51 BFM 87 BFM 127 BFM 167 BFM 207 ST startup tuning execution command z To these buffer memories set stop or execution of startup tuning S Write KO to stop startup tuning Write K1 to perform startup tuning For details on the ST Startup tuning refer to Section 6 9 2 Description nicia E 0 Stops ST startup turning 29 127 167 aor Performs ST startup turning o RW 5 Caution These buffer memories are valid only in standard PID control wasis QJ e f control is started while both the AT execution command buffer memory and the ST execution command buffer memory are set to 1 auto tuning is started uoneinByuoy e Startup tuning is not started if the conditions for performing startup tuning are not satisfied For details on the conditions for performing ST startup tuning refer to Subsection 6 9 2 uonejejsu x Buum Ol o suonoun jo uononpoau 7 c 3
106. e 0 Not used When 0 is set to the proportional band on the heating side the setting of the proportional band on the cooling side is invalid It is not possible to perform two position operation only on the cooling side welbag CO Kiowayy sayjng sojdwex Bunoouseqnou CO 89 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 24 BFM 60 BFM 100 BFM 140 BFM 180 Integral time I To these buffer memories set the integral time I for performing PID control The integral operation changes the control output in proportion to the area made by the deviation size and deviation generation time In proportional operation deviation difference between the set value SV and the measured value PV may be generated due to natural radiation even if the control output is stable Integral operation eliminates this deviation The integral time refers to the time in which the control output given by the proportional operation is obtained only by the integral operation As the integral time is decreased the integral efficiency is better Description Initial D 100 140 180 Setting range 0 to 3600 sec Caution 60 When 0 is entered the integral time I setting is invalid 8 2 25 BFM 61 BFM 101 BFM 141 BFM 181 Derivative time D 90 To these buffer memories set the derivative time D for performing PID control Derivative operation changes the control ou
107. e PLC The unit number of the 4LC is automatically assigned No 0 to No 7 Unit No 1 to No 7 is assigned when the main unit is an FX3uC 32MT LT 2 starting from the special function unit block closest to the PLC main unit This unit number is used for the designation of a FROM TO instruction For details on the assignment of the I O number and unit number of the PLC refer to the following manual corresponding to the connected PLC Refer to FX3G Hardware Edition Refer to FX3u Hardware Edition Refer to FX3uc Hardware Edition Other FXaG FX3U PLC extension FX3U ALC units blocks TV X Ki gt XL LO KI gt KZ x xz Vis cf MALE 990 000000020 N SIFO FETELLELLEE OS 273 M 15555 17 YER 7 c co BAT C c 8 7 lu ETOR ong abode Sa88RHSR ees eee Other FX3UC PLC extension FX3U 4LC units blocks POWERCO FX3u 64CCL FX2NC CNV IF e An FX2NC CNV IF or FX3UC 1PS 5V is necessary to connect the 4LC with the FX3uc PLC e The number of I O points occupied by the 4LC is eight Make sure that the total number of I O points occupied I O points of the main unit extension unit s extension block s and the number of points occupied by special function blocks does not exceed the maximum number of I O points of the PLC For information on the maximum number of I O points of the PLC refer to the respectiv
108. e main unit to be used for your system I O extension unit block Generic name for special function unit and special function block Special function unit block or The number of connectable units however depends on the type of main unit Special extension unit To check the number of connectable units refer to the User s Manual Hardware Edition of the main unit to be used for your system Special function unit Generic name for special function unit Generic name for special function block The number of connectable units however depends on the type of main unit To check the number of connectable units refer to the User s Manual Hardware Edition of the main unit to be used for your system Special function block 4LC Abbreviated name for FX3U 4LC Optional unit Memory cassette Generic name for FX3U FLROM 16 FX3U FLROM 64 FX3U FLROM 64L Battery Abbreviated name for FX3U 32BL FX 16E TB FX 32E TB FX 16EX A1 TB FX 16EYR TB FX 16EYT TB FX 16EYT H TB FX Series terminal block FX 16EYS TB FX 16E TB UL FX 32E TB UL FX 16EYR ES TB UL FX 16EYT ES TB UL FX 16EYT ESS TB UL FX 16EYS ES TB UL Peripheral unit Peripheral unit Generic name for programming software handy programming panel and indicator Programming tool Programming tool Generic name for programming software and handy programming panel Programming software Generic name for programming software GX Developer Generic name for SWLID5C GPPW J SWEID5C GPPW E pr
109. e product manual Refer to FX3G Hardware Edition Refer to FX3u Hardware Edition Refer to FX3uc Hardware Edition 23 UOnOnpoJjU Ww xe D Oo zh O o Se o uoneinByuoy wa shS uonejejsu x Buum Ol o suonoun4 jo uoONpo uy wey N welbog QO AouejJeyng OO sojdwex 3 Bunoouseqnou CO 4 Installation FX3U 4LC User s Manual 4 24 Installation INSTALLATION PRECAUTIONS Q DANGER e Make sure to shut down all phases of the power supply externally before installing Failure to do so may cause electric shock or damage to the product INSTALLATION PRECAUTIONS N CAUTION Use the product within the generic environment specifications described in PLC main unit manual Hardware Edition Never use the product in areas with excessive dust oily smoke conductive dusts corrosive gas salt air Cl2 H2S SO2 or NO2 flammable gas vibration or impacts or expose it to high temperature condensation or rain and wind If the product is used in such conditions electric shock fire malfunctions deterioration or damage may occur Do not touch the conductive parts of the product directly Doing so may cause device failures or malfunctions Install the product securely using a DIN rail or mounting screws Install the product on a flat surface If the mounting surface is rough undue force will be applied to the PC board thereby causing nonconformities When drilling
110. e rotation and an interlock circuit to prevent damage to the equipment at the upper and lower positioning limits 2 Note that when the PLC CPU detects an error such as a watchdog timer error during self diagnosis all outputs are turned off Also when an error that cannot be detected by the PLC CPU occurs in an input output control block output control may be disabled External circuits and mechanisms should be designed to ensure safe machinery operation in such a case Note that when an error occurs in a relay triac or transistor output device the output could be held either on or off For output signals that may lead to serious accidents external circuits and mechanisms should be designed to ensure safe machinery operation in such a case NCAUTION teen Do not bundle the control line together with or lay it close to the main circuit or power line As a guideline lay the control line at least 100mm 3 94 or more away from the main circuit or power line Noise may cause malfunctions e Ground the shield wire or shield of the shielded cable at one point on the PLC However do not ground them at the same point as the high voltage lines Noise may cause malfunctions Install module so that excessive force will not be applied to the terminal blocks Failure to do so may result in wire damage breakage or PLC failure GEE Sety Precautions ND Read these precautions before using 2 INSTALLATION PRECAUTIONS Q DANGER
111. e thermometer and micro voltage input 4 points output open collector transistor and 4 points CT input is a special function block for thermometer control 1 1 1 Major features of the FX3u 4LC The 4LC has the following features 1 Allows inputs from 4 channels The 4LC supports temperature sensor inputs from thermocouples and resistance thermometers as well as micro voltage inputs 2 Incorporates outputs from 4 channels The 4LC incorporates NPN open collector transistor outputs 3 Performs heating cooling PID control The 4LC handles two systems of outputs heating output and cooling output and performs heating cooling control 4 Performs cascade control The 4LC performs cascade control through combination of two control loops the master loop and slave loop 5 Performs control using external analog inputs outputs The 4LC performs PID control using voltage current inputs and voltage current outputs when combined with a special function block for analog input output 6 Performs auto tuning The 4LC can automatically measure calculate and set optimal PID constants for the preset temperature 7 Performs startup tuning The 4LC can automatically calculate and set PID constants based on the response characteristics of the control target when control is started or when the set value SV is changed 8 Detects heater disconnection The 4LC can detect heater disconnection using the current detector CT 9 Backs up s
112. e with the decimal point position When the decimal point position is 0 these buffer memories store the measured value as it is When the decimal point position is 1 these buffer memories store the measured value multiplied by 10 When external input is used 1 These buffer memories store the value written in the external input value buffer memory subject to the following processing Sensor correction Primary delay digital filter setting For details on the input type refer to Subsection 8 2 52 For details on the decimal point position refer to Subsection 8 2 2 For details on the sensor correction refer to Subsection 8 2 32 For details on the primary delay digital filter setting refer to Subsection 8 2 36 Display range When internal temperature input is given Input range lower limit 5 of span to Input range upper limit 596 of span 46 7 ug When internal micro voltage input is given Scaling lower limit 5 of span to Scaling upper limit 5 of span When external temperature input is given External input range lower limit 5 of span to External input range upper limit 5 of span Caution e When handing a numeric value containing decimal places these buffer memories store the actual value multiplied by 10 e 0 is displayed due to measurement data sampling for approximately 5 seconds after the power is turned ON The 4LC does not perform control during thi
113. ents of the buffer memory BFM 0 in the unit No 1 are read and transferred to a data register D200 The read bit information is used in bit specification of word devices Read command ENC 78 Unit No L Number of transfer points Buffer memory No Transfer destination D200 0 D200 1 D200 F IL c Writing the bit information of auxiliary relays to the buffer memory In the program below the ON OFF status of auxiliary relays M20 to M35 is written to the buffer memory BFM 518 in the unit No 0 Write Unit No on A Number of transfer points Buffer memory No Transfer source d Writing the bit information stored in data registers to the buffer memory In the program below the ON OFF status of each bit of a data register D201 is written to the buffer memory BFM 518 in the unit No 0 Each bit of the data register D201 should be set to ON or OFF in advance by bit specification of word devices Write oma FNC 79 o K518 D201 K1 TO Unit No ed L Number of transfer points Buffer memory No Transfer source 130 9 Program Examples FX3U ALC User s Manual 9 2 Example of a Program for PID Control 9 2 Example of a Program for PID Control This section provides an example of a program for PID control 9 2 1 System configuration The system configuration shown below explains the example program CH2 Measured value PV CH1 Sensor CH2 Sensor Type K Type K thermocou
114. er s Manual 8 2 Buffer Memory Details 8 2 14 BFM 44 to 47 Control mode monitor These buffer memories indicate the current control mode and cascade control status Bit O to bit 2 indicate the control mode and bit 15 indicates the cascade control status For details on the control mode refer to Subsection 8 2 62 For details on the cascade control refer to Section 6 7 Description Initial Suite pus me wr Refertotetotowng OR Control mode b2 to b0 CH1 Bit Bit sonas aree PEEP PELLET ESS Control mode Example When bits 0 and 1 are OFF and bit 2 is ON the value from bit 0 to bit 2 becomes 4 Be 1O Bng Control mode Control type Output of value j 09 Internal PID control External i Internal Heating cooling PID control 8 8 7 External Cascade control status b15 Bit Bit swncassssarsnnnn EEE PEEL EEL LJ Cascade control status m Bit15 Description 0 OFF Cascade control is not being performed 1 ON Cascade control is being performed Caution Bit 3 to bit 14 are always 0 OFF 84 8 Buffer Memory FX3U 4LC User s Manual 8 2 Buffer Memory Details 1 8 2 15 BFM 48 BFM 88 BFM 128 BFM 168 Set value SV z To these buffer memories enter the set value SV used in the PID arithmetic operation and alarm function S The unit is C 0 1 C F 0 1 F or mV in accordance with the input type setting BFMZ208 BFM 214 BFM
115. erature rise Set value SV Temperature rise ON completed flag OFF Point When the measured value PV is not stable even after it has reached the temperature rise completion range the temperature rise completion soak time gives the waiting time for the judgment of temperature rise completion 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 60 BFM 238 CT monitor method switch z To this buffer memory enter the heater current measured value display method S The setting is applied to all channels The control output MV turns ON and OFF repeatedly while control is being performed and the current at control output ON and the current at control output OFF are displayed alternately 2 If the control output MV cycle is short the heater current measured value display is not stable and difficult D to read 9 To cope with such a phenomenon the display method can be changed 8 Write KO to alternately display the current at control output ON and the current at control output OFF S Write K1 to display only the current at control output ON While the control output is OFF the current at control output ON remains displayed For details on the heater current measured value refer to Subsection 8 2 7 For details on the control output cycle setting refer to Subsection 8 2 34 MEN EE MN value 0 Monitors both ON current and OFF current RAN 1 Monitors only ON current The current at control o
116. eriod setting Subsection 8 2 35 232 Cooling method setting Subsection 8 2 54 240 241 Control mode switch Subsection 8 2 62 Subsection 8 2 4 41 UOnOnpoJjU uoneogoeds INQ wasis OO uoneJn amp ijuo uonejejsu m 5 E suonoun jo uononpoau wey N welbag CO Aow nyng OO So duJex4 Bunoouseqnou CO 6 Introduction of Functions FX3U 4LC User s Manual 6 6 Heating cooling PID control 6 6 2 Caution Cascade control is disabled when heating cooling PID control is selected The loop breaking alarm function is disabled in heating cooling PID control The loop breaking alarm dead zone is invalid in heating cooling PID control The MANUAL mode is not available in heating cooling PID control The output limiter lower limit is invalid in heating cooling PID control Overshoot prevention function 42 The overshoot prevention function is enabled in heating cooling PID control For details on the Overshoot prevention function refer to Subsection 6 4 2 6 Introduction of Functions FX3U ALC User s Manual 6 6 Heating cooling PID control 6 6 3 Overlap dead band function z The overlap dead band function switches the significant point between control stability and energy saving by S shifting the temperature at which cooling control is started Overlap 2 The overlap area indicates the temperature area where both heating output and cooling output are given i5 Control sta
117. et values using the EEPROM The 4LC can back up set values stored in buffer memories using the built in EEPROM 10 Connectable PLC Connect the 4LC to the FX3G FX3U FX3UC Series PLC An FX2NC CNV IF or FX3UC 1PS 5V is necessary to connect the 4LC with the FX3uc PLC 1 Introduction FX3U ALC User s Manual 1 2 External Dimensions and Part Names 1 2 External Dimensions and Part Names 2 4 5mounting holes 8 P dmn A O s o mo aR Ne OD N E otc 2 o E 9 10 11 12 13 Unit mm inches MASS Weight 0 4kg 0 88lbs Accessaries Label for indication of special unit block number Dust proof sheet TE eal gs peepesqos OI LAA OI LEA LEAI LEA L4AI Le px Od ID IOS IOS KS ID TS Z LC C C L CS Al LAA I LEAI LAA LA LI LE D O N OG IOG IO ID I KYI N VA AS AS AS AS 11 12 Manual supplied with product 1 Extension cable 8 DIN rail mounting groove DIN rail DIN46277 35mm 1 38 width 2 Direct mounting hole 9 DIN rail mounting hook 2 holes of 4 5 0 18 mounting screw M4 screw 3 Terminal block covers 10 Power supply terminal block M3 screw Refer to Section 1 3 4 Terminal cover 11 Input terminal block M3 screw Refer to Section 1 3 5 Power LED green 12 Output terminal block M3 screw Refer to Section 1 3 6 Status LEDs red 13 Extension connector Refer to Section 1 4 7 Nameplate 15 uononpoJu uoneogoeds IN
118. extension block Alger 9 1 2 How to read write from to buffer memory To read write from to buffer memory in the 4LC use the FROM TO instructions or applied instructions that directly specify the buffer memory To directly specify the buffer memory FX3u FX3uc PLC applicable software is required For details of applied instructions bit specification of word devices and direct specification of the buffer memory refer to the PROGRAMMING MANUAL Point Buffer memory that is assigned in 32 bits must use 32 bit instructions to read write Data cannot be correctly read written from to buffer memory assigned in 32 bits if 16 bit read write instructions are used 1 How to read and write numeric values 1 Direct specification of buffer memory Specify the buffer memory directly as the source or destination in applied instructions and then read or write the contents of the buffer memory Ul AG is substituted with a number Unit No 0 to 7 mE La Buffer memory No 0 to 255 a Reading and transferring numeric values to data registers In the program below the contents of the buffer memory BFM 5 in the unit No 1 are read and transferred to data register DO Read command FNC 12 n TIN Unit No a La Transfer result Buffer memory No 126 9 Program Examples FX3U 4LC User s Manual 9 1 Reading Writing Buffer Memory b Writing numeric values to the buffer memory 5 In the program below K32 000 is written
119. f slave channel Cascade gain Reverse operation Span of the set value monitor of slave channel number of times Input span of slave channel Cascade gain 7 Cascade bias is set up as follows 8 Normal operation x Span of the set value monitor of slave channel 2 Cascade bias _ _ ___ _ _ _ x 100 E Input span of slave channel D Reverse operation 8 l Span of the set value monitor of slave channel 2 lt Cascade bias x 100 Input span of slave channel 9 8 The set value SV of the slave channel is set up as follows After the measured value PV becomes ni stable in both the master channel and the slave channel SE Normal operation EE Set value SV of the slave channel En Set value SV of master channel SV Reverse operation Set value SV of the slave channel Set value SV of master channel SV En Bunoouseqnou CO 9 Set the operation mode of the master channel to 3 Monitor Alarm Control and perform cascade control cascade ON While checking the control status manually adjust PID constants for the master channel The control output should only be wired to a master channel 47 6 Introduction of Functions FX3U ALC User s Manual 6 7 Cascade control 6 7 3 SV tracking selection function The SV tracking selection function makes the slave c
120. following 00 RW y 1 These buffer memories can be written only while control is stopped Buum Ol Alarm mode 0 to 14 Alarm oie Alarm type Description 0 Alarm function OFF Alarm function is disabled 1 Upper limit input value alarm When measured value PV is more than alarm set value an alarm is issued 2 Lower limit input value alarm When measured value PV is less than alarm set value an alarm is issued o Ja C Len When deviation Measured value PV Set value SV is more than alarm set o9 3 Upper limit deviation alarm nr 5c value an alarm is issued 72 S 9 Y m When deviation Measured value PV Set value SV is less than alarm set 4 Lower limit deviation alarm e value an alarm is issued Er When absolute deviation 7 Measured value PV Set value SV is more than 5 Upper lower limit deviation MP alarm set value an alarm is issued When absolute deviation Measured value PV Set value SV is less than 6 Range alarm B alarm set value an alarm is issued 7 Upper limit input value alarm with When measured value PV is more than alarm set value an alarm is issued wait However when control is started the measured value is ignored 8 Lower limit input value alarm with When measured value PV is less than alarm set value an alarm is issued wait However when control is started the measured value is ignored When deviation Measured value PV Set value SV is m
121. formed Remains ON while auto tuning is being performed Turns ON when the temperature rise completion soak time is oor remperalirenisecompieteg fag finished within the temperature rise completion range Explanation of operation of the temperature rise completed flag b15 This bit notifies that the measured value PV reaches near the set value SV When the measured value reaches the temperature rise completion range BFM 236 and the soak time BFM 237 is finished temperature rise completed flag b15 turns ON For details on the temperature rise completion range refer to Subsection 8 2 58 For details on the temperature rise completion soak time refer to Subsection 8 2 59 Measured value PV Temperature rise Set value SV Temperature rise completion soak time BFM 237 Temperature rise ON completed flag b15 OFF 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 3 BFM 5 to 8 Measured value PV These buffer memories store the measured value PV The unit is C 0 1 C oF 0 19F or mV in accordance with the input type setting The displayed measured value PV is as follows depending on the input type used e When internal input is used 1 These buffer memories store the input value detected by the 4LC subject to the following processing Sensor correction Primary delay digital filter setting 2 These buffer memories store the following value in accordanc
122. g side for setting the upper limit of the control output value MV on the cooling side For details on the output limiter upper limit heating upper output limiter refer to Subsection 8 2 28 Initial Description Setting range e PID control 66 4106 146 186 O Not used 07 R W e Heating cooling PID control O to 1050 0 0 to 105 0 1 1000in the case of heating cooling PID control 2 These buffer memories can be written only while heating cooling PID control is being performed Caution e Handling numbers containing decimal places The set value should be the actual value multiplied by 10 he setting of the cooling output limiter upper limit is invalid while two position control is being performed he setting of the cooling output limiter upper limit is invalid while standard PID control is being performed Proper PID constants may not be obtained if the cooling output limiter upper limit is set and auto tuning is performed Do not set the cooling output limiter upper limit when performing auto tuning 94 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 31 BFM 67 BFM 107 BFM 147 BFM 187 Output change ratio limiter z The output change ratio limiter function limits changes in the control output value MV per unit time 1 sec S The preset output change ratio limits the control output The output does not change drastically but is given in accordance with the preset incl
123. git 3 0 C 1digit 0 7 of input value 1digit 140 C 1 digit 7 C 1digit 0 7 of input value 1 digit 1 4 C 1 digit 0 7 of input value 1 digit 0 7 of span 1digit R S N W5Re W26Re Pt100 JPt100 Pt1000 Micro voltage input 2 4 3 Current detector CT input specifications Item Specification Number of input points 4 points CTL 12 S36 8 CTL 12 S56 10 CTL 6 P H manufactured by U R D Co Ltd When CTL 12 S36 8 is used 0 0 to 100 0A When CTL 12 S56 10 is used 0 0 to 100 0A When CTL 6 P H is used 0 0 to 30 0A Larger one between 5 of input value and 2A Current detector Heater current measured value Measurement precision Sampling period 20 Excluding precision of current detector 0 5 sec 2 Specification FX3U ALC User s Manual 2 5 Input Type A 2 5 Input Type 200 0 to 200 0 C 200 0 to 200 0 C 100 0 to 400 0 C 100 0 to 400 0 C Input range 100 to 1300 C 7100 9 10 800 0 0 to 1700 C 0 to 1700 C 100 to 800 F 100 to 1200 C 0 to 3200 F 0 to 3200 F 100 to 1600 F 100 to 2400 F 100 to 2100 F 200 0 to 200 0 C 200 0 to 400 0 C 0 0 to 400 0 C 0 to 1800 C 0 to 1300 C 300 0 to 400 0 F 0 to 3000 F 0 to 2300 F 300 0 to 700 0 F 0 to 700 0 F Input type PLII W5Re W26Re U L 0 to 1200 C 0 to 2300 C 200 0 to 600 0 C 0 0 to 900 0 C 0 to 2300 F 0 to 3000 F 300 0 to 700 0 F 0 to 1600 F a Q Q c za o
124. gral value and the arithmetic operation result is held at the upper limit value Output limiter upper limit Output limiter lower limit 4 welbaug CO Kioweyseyng OO sojdwex 3 Buyoousajqno CO 39 6 Introduction of Functions FX3U ALC User s Manual 6 5 Two position Control 65 Two position Control When the proportional band P or heating proportional band P value is set to 0 the 4LC performs two position control In two position control the control output MV is set to ON when the measured value PV is larger than the set value SV or OFF when the measured value PV is smaller than the set value SV When the adjustment sensitivity dead zone is set repetitious turning ON OFF of the output around the set value SV can be prevented However if the adjustment sensitivity dead zone is set to a large value upward downward fluctuation becomes large accordingly If the adjustment sensitivity dead zone is set to a small value chattering may be caused by small oscillations of measured values PV Select control mode O to 7 for performing two position control For details on the control mode switch refer to Section 6 2 Operation Set value SV Adjustment sensitivity dead zone The adjustment sensitivity dead zone is equally given to the upper portion and the lower portion of the set value SV Control output MV Associated buffer memory BFM No Description Reference Contro
125. hannel set value SV track the set value value stored in the set value monitor buffer memory just before changeover to cascade OFF when the cascade control function is changed from ON to OFF Control group 1 GR1 The setting is applied to CH1 and CH2 Control group 2 GR2 The setting is applied to CH3 and CH4 Example of operation 1 When SV tracking is provided Set value SV of slave channel Value stored in set value monitor buffer memory for slave channel Time Cascade control ON OFF changeover point Example of operation 2 When SV tracking is not provided Set value SV of slave channel Value stored in set value monitor buffer memory for slave channel Time Cascade control ON OFF changeover point Associated buffer memory Em Description Reference Point This function prevents drastic change in the set value SV caused when the cascade control function is changed from ON to OFF 48 6 Introduction of Functions FX3U ALC User s Manual 6 8 Auto Tuning Function 6 8 Auto Tuning Function S S 6 8 1 AT Auto tuning The auto tuning function automatically measures calculates and sets optimal PID constants in accordance 2 with the set temperature E The auto tuning function is available in PID control and heating cooling PID control 2 Write 1 to the AT execution command buffer memory to perform auto tuning 9 When auto tuning starts two position control is performed using
126. he power OFF ensure the safety of the system and then simultaneously turn the main unit 4LC and other extension equipment the special extension equipment is included OFF For details refer to the respective PLC manual Refer to the FX3c Hardware Edition Refer to the FX3u Hardware Edition Refer to the FX3uc Hardware Edition 5 1 2 Grounding Ground the cables as follows The grounding resistance should be 1009 or less e Independent grounding should be established whenever possible Independent grounding should be performed for best results When independent grounding is not configured perform shared grounding as shown in the following figure For details refer to the respective PLC manual Independent grounding Shared grounding Shared grounding Best condition Good condition Not allowed Refer to the FX3G Hardware Edition Refer to the FX3U Hardware Edition Refer to the FX3uc Hardware Edition Other equipment Other Other equipment equipment e The grounding point should be close to the 4LC and all grounding wires should be as short as possible 28 5 Wiring FX3U 4LC User s Manual 5 2 Input Wiring 5 2 Input Wiring 5 2 1 Wiring example of thermocouple For thermocouples applicable to the 4L C refer to the following Refer to the Section 2 4 FX3U ALC 24V DC Grounding Ground resistance 1000 or less Compensating Thermocouple lead wire
127. ializes all data X002 Error reset is performed E X003 Heating Cooling PID Control is started 2 X004 Performs auto tuning CH1 9 The state of a flag is read MO to M15 The example program includes operation to carry out external output of the state of the error present bO 3 The state of an event CH1 is read oe M20 to M35 The example program includes operation to carry out external output of the state of the loop aa disconnection alarm b8 of CH1 s 3 DO Setting value CH1 is stored E D5 Measured value CH1 is stored D9 OUT 1 Heating control output value is stored 4 D14 OUT2 Cooling control output value is stored D21 Heater current measured value CH1 is stored 8 D252 The value of a set value range error address is stored 5 Buum Ol o suonoun jo uononpoau wey N Kowa seyng OO 1 o c c D nN 3 O O p E Q 137 9 Program Examples FX3U ALC User s Manual 9 3 Example of a Program for Heating Cooling PID Control 9 3 4 Sequence program The sequence program for the example program with the FX3U ALC as unit No 0 is shown below Change unit No O to match the actual system configuration to be used The FROM TO instructions are used for read write of buffer memory For details on the unit No refer to Subsection 9 1 1 For details on the how to read write from to buffer memory refer to Subsection 9 1 2 For details on the system configuration refer to Subsection 9 3 1
128. iation is positive When the deviation is negative Measured value PV Measured value PV Measured value PV Measured value PV Alarm set value Set value SV Deviation Deviation Set value SV Alarm set value Time Time Non alarm status Alarm status 7 2 5 Upper lower limit deviation When the absolute deviation Measured value PV Set value SV is more than the alarm set value an alarm is issued For example if the alarm set value is 10 C an alarm is issued when the measured value PV is outside the range from set value SV 10 C to set value SV 10 C Measured value PV Measured value PV Alarm set value Deviation Set value SV Deviation Alarm set value Hine Non alarm status Aiarmstatus TT Alm status 68 7 Alarm FX3U ALC User s Manual 7 2 Alarm Functions 7 2 6 Range alarm When the absolute deviation Measured value PV Set value SV is less than the alarm set value an alarm is issued For example if the alarm set value is 10 C an alarm is issued when the measured value PV is inside the range from set value SV 10 C to set value SV 10 C Measured value PV 4 Measured value PV Alarm set value Deviation Set value SV Deviation Alarm set value Tine Non alarm status Aiarmstatus EF Aamstatus 7 2 7 Alarm wait operation The wait operation ignores the a
129. imiter lower limit refer to Subsection 8 2 41 welbag CO Kiowayy sayjng sojdwex Bunoouseqnou CO 101 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 39 BFM 75 BFM 115 BFM 155 BFM 195 Normal reverse operation selection To these buffer memories set whether normal operation or reverse operation is performed in standard PID control Enter KO to specify normal operation Enter K1 to specify reverse operation Initial Description Setting range e PID control 0 Normal operation Ed RE 1 Reverse operation R W e Heating cooling PID control 0 Not used 1 These buffer memories can be written only while standard PID control is being performed Operation e Normal operation The control output MV increases as the measured value PV increases Normal operation is generally used for cooling control Control output MV Measured value PV Normal operation Reverse operation The control output MV decreases as the measured value PV increases Reverse operation is generally used for heating control Control output MV Measured value PV Reverse operation Caution The setting of normal operation reverse operation is invalid while heating cooling PID control is being performed 102 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 40 BFM 76 BFM 116 BFM 156 BFM 196 Setting limiter upper limit To these buffer memories
130. inByuoy C1 uonejejsu x 5 E jo uononpoJju wey N iowa Jayng OO welboug CO sojdwex Bunoouseqnou CO 57 6 Introduction of Functions FX3U 4LC User s Manual 6 10 AUTO MANUAL mode changeover 6 10 AUTO MANUAL mode changeover 6 10 1 AUTO mode and MANUAL mode The mode can be changed over between AUTO mode and MANUAL mode The AUTO mode is selected when KO is written to the AUTO MANUAL mode changeover buffer memory The MANUAL mode is selected when K1 is written to the AUTO MANUAL mode changeover buffer memory Set the control mode to 0 to 3 PID control for performing manual mode In the MANUAL mode b13 of the event becomes 1 to notify the MANUAL mode 0 25 sec is required to change over the mode During changeover the balance less bump less function is actuated For details on the control mode switch refer to Section 6 2 For details on the balance less bump less function refer to Subsection 6 10 2 AUTO mode In the AUTO mode the measured value PV or external input value is compared with the set value SV and the control output MV is given by PID arithmetic operation The AUTO mode is selected at shipment In the AUTO mode the MANUAL output set value is always set to the control output value MV e MANUAL mode By changing the MANUAL output set value the output value can be fixed to an arbitrary value The actual output value is within the range from the
131. ination when the power is turned ON and the output is outside the proportional band or when the set value is changed significantly 2 Description inita E o Setting range e PID control 67 107 147 187 O to 1000 0 0 to 100 0 sec R W e Heating cooling PID control 0 Not used 1 These buffer memories can be written only while standard PID control is being performed wasis GO uoneinByuoy Example of operation When the output change ratio limiter is not used Output limiter upper limit Control output value MV D 7 uonejejsu x Output drastically changes S Set how many percentages the Control output value MV o operation output is to be changed in 1 sec Output limiter lower limit gec Buum QI Drastic changes in output caused by power ON change of the set value disturbance etc o cea Caution 8 8 SE e Handling numbers containing decimal places The set value should be the actual value multiplied by 10 o Entering a small value to these buffer memories to make the inclination smaller makes the control response slow and eliminates the derivative effect The output change ratio limiter is disabled while two position control is being performed 7 c 3 The output change ratio limiter is disabled while heating cooling PID control is being performed The output change ratio limiter is disabled when
132. ince the examples within this manual technical bulletin catalog etc are used as reference please use it after confirming the function and safety of the equipment and system Mitsubishi Electric will not accept responsibility for actual use of the product based on these illustrative examples The content specification etc of this manual may be changed for improvement without notice The information in this manual has been carefully checked and is believed to be accurate however if you notice any doubtful point error etc please contact the nearest Mitsubishi Electric distributor Registration The company name and the product name to be described in this manual are the registered trademarks or trademarks of each company FX3U 4LC User s Manual Table of Contents SAFETY PRECAUTIONS inis Urn Misdascuso ua maDs aces ELE UET sa EU ania actuctiadecisiactuadaaausasmaadeataataad 1 SOCAN dS etr d 7 CeniticationonUl CUE standards eaa a N T 7 Compliance with EC directive CE Marking ioa ah rene ipa Sese t eod ae tap ere eo UR ne la ha tus Pete teh cede 7 Associated Manuals epus ham oi qi VE Gi da D RR rens Ea a A A 9 Generic Names and Abbreviations Used in the Manual 11 FRE AGING GING Mi ipn oec m 13 1 Introduction 14 UR NEG UII EUREN HET Ciets 14 1 1 1 Major features or ide FEX3U EG sii oath a eua eu eie deat e oio mt nme she abu uia el eet ion n 14 1 2 Exte
133. input is selected the following results are given Input range setting The input span is external input range upper limit external input range lower limit The input range is from external input range lower limit to external input range upper limit e Setting limiter The setting range of the setting limiter upper limit is from setting limiter lower limit 1 to external input range upper limit The setting range of the setting limiter lower limit is from external input range lower limit to setting limiter upper limit 1 e Set value SV The set value range is from setting limiter lower limit to setting limiter upper limit e Input error When a value equivalent to or larger than external input range upper limit 5 input span is set to the external input value it is regarded as an input error upper limit and bO of the event buffer memory for the corresponding channel turns ON When a value equivalent to or smaller than external input range lower limit 5 input span is set to the external input value it is regarded as an input error lower limit and b1 of the event buffer memory for the corresponding channel turns ON When external output is selected the following results are given External output value heating external output value and cooling external output value The control output value is written to the external output value heating external output value and cooling external output value and
134. irectly 4 Installation FX3U 4LC User s Manual 4 1 DIN rail Mounting 4 1 DIN rail Mounting The product may be mounted on a 35mm wide DIN46277 DIN rail Fit the upper edge A in the figure to the right of the DIN rail mounting groove onto the DIN rail Push the product onto the DIN rail An interval space of 1 to 2mm 0 04 to 0 08 between each unit is necessary Connect the extension cable SL Connect the extension cable B in the figure to the right to the main unit I O extension unit block or special function unit block on the left side of the product For information on the extension cable connection procedure refer to the respective product PLC manual Refer to the FX3G Hardware Edition Refer to the FX3uU Hardware Edition Refer to the FX3uc Hardware Edition NSSSNSSNSNSSS SSSSSSSSSS LJ S V 0 ot o n 0 o o 0 f ny o VS N e Example of installation on DIN rail Inthe case of the FX3G FX3U PLC 1 to 2mm 1 to 2mm 0 04 to 0 08 0 04 to 0 08 MK He Other FX3uU 4LC extension equipment FX3G FX3u Series main unit DIN rail n the case of the FX3uc PLC 1 to 2mm 1 to 2mm 0 04 to 0 08 0 04 to 0 08 9fK He Other extension FX3uc Series FXaU ALC equipment main unit DIN rail FX2NC CNV IF or FX3UC 1PS 5V 25 UOnOnpoJjU uoneogoeds INQ wasis
135. is started UJ T D 3 lt ES o e RS 3 s jdwex4 Bunoouseqnou CO 53 6 Introduction of Functions FX3U ALC User s Manual 6 9 Startup Tuning Function 6 9 Startup Tuning Function 6 9 1 ST startup tuning The startup tuning function automatically measures calculates and sets optimal PID constants based on the response characteristics of the control target when control is started or when the set value SV is changed Startup tuning works as easy as auto tuning and acquires PID constants in a short time at start of control without disturbing the controllability for a slow response control target This function acquires PID constants every time the set value SV is changed for a control target requiring different PID constants at each temperature setting Startup tuning is automatically started when control is started or when the set value SV is changed while all conditions for performing startup tuning are satisfied The following buffer memories store calculated values Applicable buffer memory Calculated value Value to be set l Less than 0 1 0 1 Proportional band P 1000 0 or more 1000 0 Less than 1 sec 1 sec Integral time 1 3600 sec or more 3600 sec Derivative time D 3600 sec or more 3600 sec When startup tuning is normally finished the 4LC continues control using new calculated PID constants Example of operation Measured value PV Set value SV2D
136. ise noise disturbance and or surge induction are likely to take place As a guideline lay the control line at least 100mm 3 94 or more away from the main circuit high voltage line or load line Ground the shield wire or shield of the shielded cable at one point on the PLC However do not use common grounding with heavy electrical systems Make sure to properly wire to the terminal blocks in accordance with the following precautions Failure to do so may cause electric shock equipment failures a short circuit wire breakage malfunctions or damage to the product The disposal size of the cable end should follow the dimensions described in the manual Tightening torque should follow the specifications in the manual 27 GHEE S2fety Precautions NND Read these precautions before using 4 STARTUP AND MAINTENANCE PRECAUTIONS Do not touch any terminal while the PLC s power is on Doing so may cause electric shock or malfunctions Before cleaning or retightening terminals cut off all phases of the power supply externally 125 Failure to do so may cause electric shock 141 Before modifying or disrupting the program in operation or running the PLC carefully read through this manual and the associated manuals and ensure the safety of the operation An operation error may damage the machinery or cause accidents Do not disassemble or modify the PLC Doing so may cause fire equipment failures or malfunctions For repair
137. ise completion range setting cccccceecccceeeceeeeeeeeceeeeeseeeeeeseeeeeens 115 8 2 59 BFMZ237 Temperature rise completion soak tiME cccceeecceceeceeceeeceeeeeceeseeeeeseeeeeeseeeeeees 116 8 2 60 BFMZ238 CT monitor method switch eeesssseesssessssseenreeennnennenne nennen 117 92 61 BRMAZ39 C P raio Seda uuassded odorato a b en pase e aatuases ore deesse idee teda ce 117 8 2 62 BFM 240 241 Control mode switch seeeeseeesseseessseeeeeeennnennnnn nnne 118 8 2 63 BFM 242 243 SV tracking selection 2 seeseeeesssesesseseeseeeeeeenen nnn 119 8 2 64 BFM 244 245 Cascade ON OFF eeeessssseseeennnnennnn nennen nnns nnn nnn nn ann nnns 120 8 2 65 BFM 246 247 Cascade gain ccccccccccssccecsseeeceneeeseusceceeececsuaceeseueesseaeesssaeeesseeessuseesseeeees 120 9 2 66 BFM 248 249 Cascade DIas 6E E tvm eru t mac a ant 121 8 2 67 BFM 250 251 Cascade monitor sees nennen nnns 121 8 2 68 BFM 252 Set value range error address esssesssesssssssseseeeene enne nnne 122 8 2 69 BFM 253 Error reset command cccccccesececeececeeseeeceececeeacecsaucesseecesseueeessuseessegeessaeeeseees 122 8 2 70 BFM 254 Set value backup COMMANA cccccceeececeeeeeeeeccecaeeeeaeeeeeseeeeesueeeeseeeeesseeensneeeees 123 8 2 71 BFM 255 Initialization command
138. ishi Service Company However if repairs are required onsite at domestic or overseas location expenses to send an engineer will be solely at the customer s discretion Mitsubishi shall not be held responsible for any re commissioning maintenance or testing on site that involves replacement of the failed module Gratis Warranty Term The gratis warranty term of the product shall be for one year after the date of purchase or delivery to a designated place Note that after manufacture and shipment from Mitsubishi the maximum distribution period shall be six 6 months and the longest gratis warranty term after manufacturing shall be eighteen 18 months The gratis warranty term of repair parts shall not exceed the gratis warranty term before repairs Gratis Warranty Range 1 The range shall be limited to normal use within the usage state usage methods and usage environment etc which follow the conditions and precautions etc given in the instruction manual user s manual and caution labels on the product 2 Even within the gratis warranty term repairs shall be charged for in the following cases a Failure occurring from inappropriate storage or handling carelessness or negligence by the user Failure caused by the user s hardware or software design b Failure caused by unapproved modifications etc to the product by the user c When the Mitsubishi product is assembled into a user s device Failure that could have
139. kely to take place As a guideline lay the control line at least 100mm 3 94 or more away from the main circuit high voltage line or load line Ground the shield wire or shield of the shielded cable at one point on the PLC However do not use common grounding with heavy electrical systems Make sure to properly wire to the terminal blocks in accordance with the following precautions Failure to do so may cause electric shock equipment failures a short circuit wire breakage malfunctions or damage to the product The disposal size of the cable end should follow the dimensions described in the manual Tightening torque should follow the specifications in the manual wass GO uoneJn6ijuo uogepersu xm 6 suoroun J jo uononpoau wey N welbog QO AouejJeyng OO sojdwex 3 Bunoouseqnou CO 27 5 Wiring FX3U 4LC User s Manual 5 1 Power Supply Wiring 5 1 Power Supply Wiring 5 1 1 Power supply wiring Stabilized FX2nc CNV IF Stabilized power Supply Grounding or power supply Grounding Ground resistance FXsuc 1PS 5V 24V DC Ground resistance 1000 or less 100Q or less Grounding 1 Ground resistance 1002 or less FX3auc PLC FX3uU PLC Main unit Mai it ain uni Grounding Ground resistance 100 or less Power on off timing The 4LC power supply should be turned ON simultaneously with or before the power supply of the PLC main unit Before turning t
140. kind nor does it confer any patent licenses Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial property rights which may occur as a result of using the contents noted in this manual 2010 MITSUBISHI ELECTRIC CORPORATION FX3U 4LC User s Manual Outline Precautions 1 This manual provides information for the use of the FX3U 4LC temperature control block The manual has been written to be used by trained and competent personnel The definition of such a person or persons is as follows Any engineer who is responsible for the planning design and construction of automatic equipment using the product associated with this manual should be of a competent nature trained and qualified to the local and national standards required to fulfill that role These engineers should be fully aware of all aspects of safety with aspects regarding to automated equipment Any commissioning or maintenance engineer must be of a competent nature trained and qualified to the local and national standards required to fulfill the job These engineers should also be trained in the use and maintenance of the completed product This includes being familiar with all associated manuals and documentation for the product All maintenance should be carried out in accordance with established safety practices All operators of the completed equipment should be trained to use that product in a safe and coordinated manne
141. l 32 FX3U 4LC User s Manual 6 Introduction of Functions 6 1 Functions List 6 6 1 Introduction of Functions Functions List The list below describes functions of the 4LC Selects the control type and used input output for each control group Selects the function of transistor outputs built into the 4LC Offers stable control results by presetting constants P proportional band integral time and D derivative time Prevents overshoot of the control output MV Turns ON or OFF the control output MV depending on whether the measured value PV is larger or smaller than the set value SV Handles two systems of outputs heating control output and cooling control output Switches the significant point between control stability and energy saving by shifting the temperature at which cooling control is started Functions Control mode switch function Transistor output selection function PID control Overshoot prevention function Two position control Heating cooling PID control Overlap Dead band function Switches the cooling method among air cooling type water cooling type and cooling gain linear type in accordance with the cooling unit type Performs cascade control by combining two control loops the master loop and slave loop Makes the slave channel set value SV track the set value value stored in the set value monitor buffer memory just before changeover to cascade
142. l output range lower limit for setting the lower limit of the external output uoneinByuoy For details on the external output range upper limit refer to Subsection 8 2 48 MEM XS initia NENNEN range 32000 to 32000 125 165 205 However make sure that the external output range upper limit is larger than the external output range lower limit CH1 85 uonejejsu x Buum Ol o suonoun jo uononpoau 7 c 3 uei CO Kiowayy yng So duJex4 Bunoouseqnou CO 107 FX3U 4LC User s Manual 8 Buffer Memory 8 2 Buffer Memory Details 8 2 50 BFM 86 BFM 126 BFM 166 BFM 206 Transistor output selection 108 To these buffer memories set the function of transistor outputs built into the 4LC Available transistor output functions vary depending on the control mode setting 86 Transistor output selection set value OUT1 CH1 control output 0 1 PID control Internal output For details on the control mode switch refer to Section 6 2 2 3 PID control Control mode 4 5 Heating cooling For details on the transistor output selection function refer to Section 6 3 126 166 206 Setting range 0 to 7 Refer to the following 0 RW Transistor output selection 6 7 Heating cooling OUT2 CH2 control output OUT1 PID control PID control External output 4 Internal output External output
143. l output value MV monitor MESE EU Heating control output value MV monitor 13 Cooling control output value MV monitor Subsection 8 2 5 48 128 168 Set value SV Subsection 8 2 15 58 138 178 Proportional band P Heating proportional band P Subsection 8 2 22 69 109 149 189 Adjustment sensitivity dead zone setting Subsection 8 2 23 240 241 Control mode switch Subsection 8 2 62 Subsection 8 2 4 40 6 Introduction of Functions FX3U 4LC User s Manual 6 6 Heating cooling PID control 6 6 Heating cooling PID control 6 6 1 Heating cooling PID control Heating cooling PID control handles two systems of outputs heating control output and cooling control output The heating side performs the reverse operation in which the control output MV decreases as the measured value PV increases and the cooling side performs the normal operation in which the control output MV increases as the measured value PV increases With regard to PID constants for heating cooling control set the proportional band P respectively for each of the heating side and the cooling side and set a common value to the integral time I and derivative time D for both the heating side and the cooling side It means that the 4LC performs arithmetic operation using four PID constants proportional band for the heating side proportional band for the cooling side common integral time and common derivative time It i
144. l uogeyessu IE o wey N Kowa seyng OO 9 Program Examples FX3U ALC User s Manual 9 3 Example of a Program for Heating Cooling PID Control From previous page From previous page 140 Initializes all data Error reset command X001 When X001 is set to ON all TO B KO K255 K1 K1 data is initialized Performs initialization When initialization is not necessary this line can be X002 Disabl t a When X002 is set to ON all errors indicated by the flag omitted X002 BFM 0 are reset Performs error reset Starts stops control When X003 turns OFF control oo stops When X003 turns ON control Stops control starts In order to turn OFF the control X003 output this line is required and cannot be omitted The control output cannot be set to OFF by changeover from RUN to STOP of the PLC main unit Starts control When X004 is set to ON auto tuning is performed Once auto tuning has started it Auto tuning is OFF after that being performed CH1 When the flag M34 turns OFF X004 while auto tuning is performed it is TO g KO K56 K1 K1 judged that auto tuning IS P completed Then KO is written to erforms auto tuning CH1 BEM 56 Because of this auto tuning can be performed again If auto tuning does not have to be performed again the upper two lines can be omitted M34 turn ON and off in accordance with the event status Yo00 An error is present Yo00 CH1 Alarm1
145. large a proportional band value increases the overshoot and requires a longer time until the output value MV reaches the set value SV and becomes stable i Description Ass 138 178 Setting range 0 to 10000 0 0 to 1000 0 of span 1 Input span for internal temperature input Scaling span for internal micro voltage input External input span for external input wasis GO 58 uoneinByuoy Caution e Handling numbers containing decimal places The set value should be the actual value multiplied by 10 uonejejsu x e n standard PID control the set value 0 specifies two position operation e n heating cooling PID control the set value 0 specifies two position operation on both the heating side and the cooling side Buum Ol 8 2 23 BFM 59 BFM 99 BFM 139 BFM 179 Cooling proportional band P To these buffer memories set the proportional band P on the cooling side for performing heating cooling PID control o Initial Description value Ti C 59 99 139 4179 o EE 99 139 179 Setting range 1 to 10000 0 1 to 1000 0 of span B 28 1 Input span for internal temperature input S o scaling span for internal micro voltage input External input span for external input Caution 7 c 3 e Handling numbers containing decimal places The set value should be the actual value multiplied by 10 e n standard PID control these buffer memories stor
146. larm status of the measured value PV when control is started and disables the alarm function until the measured value PV enters the alarm region after the wait period has ended When the wait operation is performed When the wait operation is not performed Measured value PV Measured value PV Measured value PV Measured value PV Set value SV Set value SV Deviation Alarm set value Deviation Alarm set value Time Time Wait operation region Alarm status wO Cf Non alarm status Alarm status 69 UOnOnpoJjU uoneogoeds INQ wasis QJ uoneinByuoy uonejejsu x Buum Ol o suonoun 4 jo uononpoau w c T D 3 o x3 U 3 e 3 So duJex4 Bunoousejqnou CO FX3U 4LC User s Manual 7 Alarm 7 2 Alarm Functions 7 2 8 Alarm re wait operation 70 The alarm re wait operation ignores the alarm status of the measured value PV when control is started and disables the alarm function until the measured value PV enters the alarm region after the wait period has ended When the set value SV is changed the measured value PV for deviation alarm changes accordingly At this time even if the measured value PV becomes the alarm status the alarm re wait function ignores it again and disables the alarm function until the measured value PV goes out of the alarm status again Re wait operation Measured value PV Set value SV 2 Alarm set value
147. ling PID control 9 Auto tuning is not started if conditions for performing auto tuning are not satisfied en For details on the conditions for performing AT auto tuning refer to Subsection 6 8 2 8g 3 Bunoouseqnou CO 87 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 21 BFM 57 BFM 97 BFM 137 BFM 177 Operation mode These buffer memories specify the operation mode among Monitor Alarm Control Monitor Alarm Monitor and Not used Write KO not to use the channel Write K1 to only monitor the measured value Write K2 to monitor the measured value and issue alarms Write K3 to monitor the measured value issue alarms and perform control all operations The operation status varies depending on the combination with the setting of the control start stop changeover buffer memory For the details refer to Operation status resulting from the combination with the setting of the control start stop changeover buffer memory below For details on the control start stop changeover refer to Subsection 8 2 9 Description nina Backup Not used Monitor 57 97 137 177 Monitors Alain 3 R W Z Monitor Alarm Control Operation status resulting from the combination with the setting of the control start stop changeover buffer memory Starts Operation mode control Description 2 Monitor 3 Monitor Stops 0 Not used i jon x n vc io Conirol arm arm ontro
148. mory is set to 1 while startup tuning is being performed startup tuning is aborted and auto tuning is started e f auto tuning is performed while the output change ratio limiter is set to any value other than 0 optimal PID constants may not be acquired Do not use the output change ratio limiter when performing auto tuning The loop breaking alarm function is disabled while auto tuning is being performed 50 6 Introduction of Functions FX3U ALC User s Manual 6 8 Auto Tuning Function 6 8 2 Conditions for performing and aborting AT auto tuning Conditions for performing AT auto tuning Auto tuning can be performed when all the following conditions are satisfied The control start stop changeover set to 1 Starts control The operation mode set to 3 Monitor alarm Control The AUTO MANUAL mode changeover set to 0 AUTO mode The value stored in the output limiter upper limit heating output limiter upper limit buffer memory is not the same as the value stored in the output limiter lower limit buffer memory The value stored in the output limiter upper limit heating output limiter upper limit buffer memory and the value stored in the cooling output limiter upper limit buffer memory are 1 0 1 or more The value stored in the output limiter lower limit buffer memory is 999 99 9 or less Input value error upper limit or lower limit has not occurred The proportional band setting is not 0 0
149. n For details on the loop breaking alarm judgement time refer to Subsection 8 2 42 For details on the loop breaking alarm dead zone refer to Subsection 6 12 2 Operation Loop breaking alarm is issued in the following cases PID control reverse operation When output is less than 0 or When measured value PV does not decrease at least by loop breaking change output limiter lower limit criteria within loop breaking alarm judgement time an alarm is issued When output is more than 100 or When measured value PV does not increase at least by loop breaking change output limiter upper limit criteria within loop breaking alarm judgement time an alarm is issued PID control normal operation When output is less than 0 or When measured value PV does not decrease at leas by loop breaking change output limiter lower limit criteria within loop breaking alarm judgement time an alarm is issued When output is more than 100 or When measured value PV does not increase at least by loop breaking change output limiter upper limit criteria within loop breaking alarm judgement time an alarm is issued 1 The variation range for loop breaking alarm judgment is fixed as follows and cannot be changed 2 0 C for internal temperature input 0 296 of the scaling span for internal micro voltage input 0 2 of the external input span for external input n heating cooling PID control The loop breaking alarm function is disabled A
150. n 8 2 7 M Initial Description value Setting range 3 to 255 times 8 2 58 BFM 236 Temperature rise completion range setting Backup CH1 235 wasis GO uoneJn6ijuo To this buffer memory set the temperature rise completion range The setting is applied to all channels Set the temperature range in which temperature rise is regarded as completed for the set value SV When temperature rise is completed the temperature rise completion flag b15 of the event buffer memory turns ON By setting the temperature rise completion soak time it is possible to delay the time until the temperature rise completion flag turns ON after the measured value PV enters the temperature rise completion range Set integers from 1 to 100 for temperature The setting value does not depend on input type For details on the event refer to Subsection 8 2 2 For details on the temperature rise completion soak time refer to Subsection 8 2 59 e Initial meos OO mm e uonejejsu x Buu Ol CH1 o 236 Setting range 1 to 100 1 to 100 C F digit ca Example of operation ag 9S6 Temperature rise 1o completion range 9 ms Measured value PV Y ee 2 aicbetaksd lm i 0 01 of span 1 Set value SV 7 gt 3 oc 1 0 01 of span 1 Tem i ON w perature rise leted fl E completed flag OFF S Caution 3 The temperature rise completion range is
151. n the heating side and proportional band on the cooling side overlap in the overlap area When the measured value PV is located within the overlap area both the control output on the heating side and the control output on the cooling side are given at the same time Dead band The dead band dead zone is located between the proportional band on the heating side and the proportional band on the cooling side When the measured value PV is located within the dead band both the control output on the heating side and the control output on the cooling side are not output Control output value MV Heating Cooling proportional proportional band band 100 N 2 44 Heating Cooling output value output value Measured 0 value PV Set value SV Overlap Caution e The setting of the overlap area dead band is invalid while two position control is being performed e These buffer memories store 0 while standard PID control is being performed Not used e Set the overlap area within the proportional band setting range 92 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 28 BFM 64 BFM 104 BFM 144 BFM 184 Output limiter upper limit z Heating upper output limiter S To these buffer memories set the output limiter upper limit heating output limiter upper limit for setting the upper limit of the control output value MV Set the up
152. non by selecting P control I 0 D 0 or PD control I 0 for the slave channel Determine P control constants or PD control constants based on the auto tuning result performed in the slave channel and reduce the proportional band by 60 to 70 uoneJn amp ijuo uonejejsu m 2 Turn ON control of only the master channel perform auto tuning and obtain PID constants for the master channel Set the operation mode of the slave channel to 1 Monitor or 2 Monitor Alarm and the control output should only be wired to a master channel 3 Seta same set value SV for both the master channel and the slave channel 5 E 4 Turn OFF cascade control and control only the slave channel Set the operation mode of the master channel to 1 Monitor or 2 Monitor Alarm and the control output should only be wired to a slave channel 5 When the measured value PV becomes stable in both the master channel and the slave channel obtain the measured value PV difference En between the master channel and the slave channel En Measured value PV of master channel Measured value PV of slave channel 6 The span of the set value monitor of a slave channel is determined to be about 4 times of the measured value PV difference En of the master channel from Procedure 5 and slave channel the cascade gain is set up as follows Normal operation Span of the set value monitor of slave channel number of times Input span o
153. o tuning or ST startup tuning abnormally b5 CH2 AT ST abnormal end flag ends Turns ON when CH3 AT auto tuning or ST startup tuning abnormally b6 CH3 AT ST abnormal end flag end Turns ON when CH4 AT auto tuning or ST startup tuning abnormally CH4 AT ST abnormal end flag ends b8 Adjustment data error Turns ON when an error has been caused by noise or when a failure has Cold contact temperature compensation occurred in the 4LC data error Turn the power ON again and check for changes in the state If no improvement is obtained consult a Mitsubishi Electric distributor o N b10 A D converted value error Event BFM 1 The following bits of the event buffer memory BFM 1 indicate errors Bit Description Cause of error bO Input error upper limit Turns ON when input value is over scale b1 Input error lower limit Turns ON when input value is under scale Cold contact temperature compensation Turns ON when an error has been caused by noise or when a failure has data error occurred in the 4LC Turn the power ON again and check for changes in the state If no b3 A D converted value error improvement is obtained consult a Mitsubishi Electric distributor b4 Alarm 1 Turns ON when an alarm 1 has occurred Alarm 2 Turns ON when an alarm 2 has occurred b6 Alarm 3 Turns ON when an alarm 3 has occurred b7 Alarm 4 Turns ON when an alarm 4 has occurred b8 Loop breaking alarm Turns ON when a loop breaking alarm has
154. oJjU uoneogoeds INQ wasis QJ uoneinByuoy uonejejsu x Buu Ol o suonoun4 jo uononpoau 7 c 3 welbag CO Kiowayy sayjng sojdwex Bunoouseqnou CO 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 42 BFM 78 BFM 118 BFM 158 BFM 198 Loop breaking alarm judgement time 104 To these buffer memories enter the loop breaking alarm judgment time The loop breaking alarm function starts to detect the variation of the measured value PV at every loop breaking alarm judgment time when the output becomes more than 100 or the output limiter upper limit or less than 0 or the output limiter lower limit then sets to ON the loop breaking alarm when judging that there is an abnormality in the control loop For details on the loop breaking alarm function refer to Section 6 12 Description io Backup Setting range e PID control 78 118 158 198 0 to 7200 sec i Td e Heating cooling PID control 0 Not used 1 These buffer memories can be written only while standard PID control is being performed Operation The loop breaking alarm is issued in the following cases PID control reverse operation When output is less than 0 or When measured value PV does not decrease at least by loop breaking change output limiter lower limit criteria within loop breaking alarm judgement time an alarm is issued When output is more than 100 or When meas
155. occurred b9 Heater disconnection alarm Turns ON when a heater disconnection alarm has occurred o i91 b10 Current error when output is OFF Turns ON when a current error occurs while output is OFF 10 1 1 How to reset an error After removing the cause of the error reset the error by executing the error reset command If the cause of the error remains the error bit turns ON again For details of the error reset command refer to the following Refer to Subsection 8 2 69 142 10 Troubleshooting FX3U ALC User s Manual 10 2 Diagnostics on the PLC Main Unit 10 2 Diagnostics on the PLC Main Unit The following describes some of the PLC errors from the LED lights on the PLC For details related to the PLC main unit wiring special auxiliary relays and special data registers refer to the following respective manuals Refer to the FX3G Hardware Edition Refer to the FX3u Hardware Edition Refer to the FX3uc Hardware Edition 10 2 1 POWER POW LED on flashing off The table below describes details for the LED statuses Status PLC Status Error corrective action Power of the specified voltage is being x supplied to the power supply terminal The power sUpply I normal One of the following causes may have occurred Power and current of the specified Flicker voltage is not being supplied to the power supply terminal Incorrect external wiring Internal errors in the PLC e Check the supply voltage
156. of span 234 Alarm delay count 0 to 30000 times 0 RW v Number of times of heater disconnection alarm 235 delay Number of times of current error detection 3 to 255 times 3 RW v when output is OFF delay 236 Temperature rise completion range setting 0 to 100 C F digit 237 Temperature rise completion soak time 0 to 3600 sec 0 RW v 0 Monitors both ON current 238 CT monitor method switch and OFF current RIW y 1 Monitors only ON current a Siis wey N Kowa Jeyng welboug CO s jdwex4 Bunoousejqnou CO 75 8 Buffer Memory FX3U 4LC User s Manual 8 1 Buffer Memory List BFM No i Description set range E Remarks E 0 to 3 PID control 240 241 Control mode switch 4 to 7 Heating cooling R W PID control PID control SV tracking selection i cs R W Enable 242 Tp eating cooling i PID control Cascade ON OFF O Carada d R W 1 Cascade ON 244 245 eer eating cooling i 10000 to 10000 246 247 TEE E eating cooling Un to 1000 248 249 VET IRSE eating cooling i 0 Normal 252 Set value range error address 110255 Setting error address IC MERHE 253 Error reset command MOINS UNI R W 1 Resets errors 254 Set value backup command paren R W b 1 Starts to write EEPROM 0 Performs nothing a 1 Initializes all data 255 Initialization command 2 Initializes BEM 48 to 4207 R W 232 and 242 to 247 LU NEN ee ee ee EE
157. of the control loop 1 Control loop1 Master channel side channel 1 Cascade OFF Measured value PV PID arithmetic Control output MV e Or _ gt External input value Dperaon Control output OUT 1 Cascade ON Set value SV Set value monitor Measured value PV PID arithmetic Control output MV a operation External input value Control output OUT 2 Set value monitor Cascade bias Cascade monitor 45 Bunoouseqnou CO uoneJn amp ijuo suoroun J jo uononpoau So duJex4 UOnOnpoJjU uoneogoeds INQ wasis QO uonejejsu m 5 E wey N welbaug CO Aow n yng OO 6 Introduction of Functions FX3U ALC User s Manual 6 7 Cascade control Conditions for enabling cascade control he master channel is separated from the slave channel and the proper intermediate control quantity can be selected The response speed of the control target in the slave channel is sufficiently faster than the response speed of the control target in the master channel Associated buffer memory BFM No Description Reference 5 8 Measured value PV Subsection 8 2 3 Control output value MV monitor Heating control output value MV monitor 142 182 Quis 240 Control mode switch Subsection 8 2 62 242 243 SV tracking selection Subsection 8 2 63 Caution 9 10 11 12 Subsection 8 2 4 e Casca
158. ogramming software package FX PCS WIN E Generic name for FX PCS WIN or FX PCS WIN E programming software package Handy programming panel HPP Generic name for FX 30P FX 20P SETO FX 20P FX 20P E SETO and FX 20P E Indicator GOT1000 series Generic name for GT15 GT11 and GT10 GOT 900 series Generic name for GOT A900 series and GOT F900 series GOT A900 series Generic name for GOT A900 series GOT F900 series Generic name for GOT F900 series Generic name for ET 940 series E T2940 series Only manuals in Japanese are available for these products 11 FX3U ALC User s Manual Generic Names and Abbreviations Used in the Manual 12 Generic name or abbreviation Description Manual FX3G Hardware Edition FX3G Series User s Manual Hardware Edition FX3U Hardware Edition FX3U Series User s Manual Hardware Edition FX3uc Hardware Edition FX3uc Series User s Manual Hardware Edition Programming manual FX3G FX3U FX3UC Series Programming Manual Basic and Applied Instructions Edition Communication control Edition FX Series User s Manual Data Communication Edition Analog control Edition FX3G FX3U F X3uC Series User s Manual Analog Control Edition Positioning control Edition FX3G FX3u F X3UC Series User s Manual Positioning Control Edition FX3U 4LC User s Manual Reading the Manual Reading the Manual In this manual the following formats are used for describing the common items Shows the manual title
159. oid drastic change in the set value SV To these buffer memories enter the change ratio 96 of the set value per minute The set value monitor buffer memory indicates the set value SV is being changed For details on the set value monitor refer to Subsection 8 2 13 Description Initial dis ait 113 153 193 Setting range 0 to 1000 0 0 to 100 0 of span o0 RW 1 Input span for internal temperature input Scaling span for internal micro voltage input External input span for external input Backup CH1 Example of operation When the set value SV 1 is changed to a larger set value SV 2 Set value SV2 After change Set value SV 1 BK Set by how many percentages Before change of the span the set value is to increase in a minute The set value is changed Operation when the control status is changed from stop to start he measured value PV at the time of changeover changes toward the set value SV in accordance with the setting change ratio limiter e f the measured value PV at the time of changeover is outside the setting limiter range the setting limiter value changes toward the set value SV in accordance with the setting change ratio limiter e f the measured value PV at the time of changeover is outside the acquisition range input value error the setting change ratio limiter is not
160. oltage input scaling upper limit To these buffer memories set the micro voltage input scaling upper limit for setting the upper limit of the display range for the micro voltage input For details on the micro voltage input scaling lower limit refer to Subsection 8 2 45 Description niia Backup Setting range 20000 to 20000 However make sure that the span absolute value of Upper limit PODE TATON bow Lower limit is 20000 or less and that the micro voltage input scaling y upper limit is larger than the micro voltage input lower limit 8 2 45 BFM 81 BFM 121 BFM 161 BFM 201 Micro voltage input scaling lower limit To these buffer memories set the micro voltage input scaling lower limit for setting the lower limit of the display range for the micro voltage input For details on the micro voltage input scaling upper limit refer to Subsection 8 2 44 Description miha Backup Setting range 20000 to 20000 However make sure that the span absolute value of Upper limit Sed iet Oean Lower limit is 20000 or less and that the micro voltage input scaling y upper limit is larger than the micro voltage input lower limit 8 2 46 BFM 82 BFM 122 BFM 162 BFM 202 External input range upper limit To these buffer memories set the external input range upper limit for setting the upper limit of the external input For details on the external input range lower limit refer to Subsection 8 2 47
161. ore Subsection 9 than alarm set value an alarm is issued Span to Span S alarm with wait 1 2 1 S However when control is started the measured value is ignored E Wa When deviation Measured value PV Set value SV is less Lower limit deviation value MS Subsection 10 than alarm set value an alarm is issued Span to Span 9 alarm with wait ve 7 2 7 However when control is started the measured value is ignored mU T When absolute deviation Measured value PV Set value ag Upper lower limit deviation E 2 Subsection 3 11 SV is more than alarm set value an alarm is issued 0 to Span o9 value alarm with wait ae 1 2 1 o3 However when control is started the measured value is ignored D When deviation Measured value PV Set value SV is more 12 Upper limit deviation value than alarm set value an alarm is issued S Subsection alarm with re wait However when control is started and when set value is changed PSI cpm 7 2 8 1 0 the measured value is ignored o o P O gt 65 7 Alarm FX3U ALC User s Manual 7 1 Alarm List When deviation Measured value PV Set value SV is less 13 Lower limit deviation value than alarm set value an alarm is issued 9 Subsection alarm with re wait However when control is started and when set value is changed Span to Span 7 2 8 the measured value is ignored When absolute deviation Measured value
162. ore than alarm set 7 c 3 Upper limit deviation value alarm n UJ 9 with wait value an alarm is issued S However when control is started the measured value is ignored S When deviation 7 Measured value PV Set value SV is less than alarm set D Lower limit deviation value alarm e 10 with iait value an alarm is issued E However when control is started the measured value is ignored When absolute deviation Measured value PV Set value SV is more than Upper lower limit deviation value m 11 B NS alarm set value an alarm is issued However when control is started the measured value is ignored m 3 o When deviation Measured value PV Set value SV is more than alarm set is 42 Upper limit deviation value alarm value an alarm is issued Ae with re wait However when control is started and when set value is changed the measured value is ignored When deviation Measured value PV Set value SV is less than alarm set 1 13 Lower limit deviation value alarm value an alarm is issued with re wait However when control is started and when set value is changed the measured value is ignored Bunoouseqnou CO 111 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details Alarm ae mode Alarm type Description When absolute deviation Measured value PV Set value SV is more than Upper lower limit deviation value alarm set value an alarm is issued alarm wi
163. ory Details 8 2 55 BFM 233 Alarm dead band setting To these buffer memories set the dead zone for alarms 1 to 4 The setting is applied to alarms 1 to 4 in all channels When the measured value PV is around the alarm set value the alarm status and non alarm status may be repeated due to input fluctuations By setting the alarm dead zone it is possible to prevent repetitions of the alarm status and non alarm status For details on the alarm function refer to Chapter 7 For details on the measured value PV refer to Subsection 8 2 3 For details on the alarm setting value refer to Subsection 8 2 16 For details on the alarm mode setting refer to Subsection 8 2 53 men nae value Setting range 0 to 100 0 0 to 10 0 of span 1 Input span for internal temperature input Scaling span for internal micro voltage input External input span for external input Backup 233 Example of operation 1 Upper limit input value alarm Upper limit deviation alarm Measured value PV 4 Measured value PV Alarm set value D gt P o s SINR Pee ee eM Dead zone Time Non alarm status Alarm status O Alarm status Example of operation 2 Lower limit input value alarm Lower limit deviation alarm Measured value PV a Measured value PV QQ VU US WV AS SS 2 e Se SRN cl RII RRR Mops Dead zone Alarm set value gt Time
164. output limiter lower limit to the output limiter upper limit The output change ratio limiter setting is valid The MANUAL output set value can be changed while b13 of the event is ON Associated buffer memory BFM No 65 105 145 185 Output limiter lower limit Subsection 8 2 29 67 107 147 187 Output change ratio limiter Subsection 8 2 31 Description Reference Caution e The MANUAL mode is not available while heating cooling PID control is being performed Even in MANUAL mode the temperature alarm function is functional 6 Introduction of Functions FX3U 4LC User s Manual 6 10 AUTO MANUAL mode changeover 6 10 2 Balance less bump less function The balance less bump less function prevents overload caused by drastic change in the control output value MV when the mode is changed over from AUTO mode to MANUAL mode or from MANUAL mode to AUTO mode The balance less bump less function is automatically activated when the AUTO mode is switched to the MANUAL mode and does not require setting Operation performed when the mode is changed over from AUTO mode to MANUAL mode The control output value MV in the AUTO mode continues to be effective Operation performed when the mode is changed over from MANUAL mode to AUTO mode The control output value MV is changed over to a value automatically calculated based on the set value SV Example of operation Control output value MV AUTO mode M
165. per limit of the output for standard PID control 2 Set the upper limit of the output on the heating side for heating cooling PID control Y For details on the output limiter lower limit refer to Subsection 8 2 29 8 For details on the cooling upper output limiter setting refer to Subsection 8 2 30 z Description micra Backup Setting range e PID control 64 104 144 184 Output limiter lower limit 1 to 1050 to 105 0 1000 R W v Heating cooling PID control O to 1050 0 0 to 105 0 Example of operation wasis GO uoneinByuoy Control output value MV 100 uonejejsu x This range is excluded from the trol output Output limiter upper limit control output Buum OW Output limiter lower limit Pees This range is excluded from the control output 0 Caution 6 ca e Handling numbers containing decimal places The set value should be the actual value multiplied by 10 28 The setting of the output limiter upper limit heating output limiter upper limit is invalid while two position g Oo control is being performed The setting of the output limiter lower limit is invalid while heating cooling PID control is being performed Proper PID constants may not be obtained if the output limiter upper limit heating output limiter upper limit is set and auto tuning is performed Do not set the output limiter upper limit heating output limiter upper limit when performing auto tuning 7 c
166. ple thermocouple CH1 Measured value PV CH1 Heater current measured value Temperature chamber Temperature chamber CH1 Current detector CTL 6 P H Current CH2 Heater current detector Main unit Unit No 0 measured value FX3U Series FX3U 4LC CH1 Control output MV Solid state relay Solid state relay CH2 Control output MV 9 2 2 Conditions of operation The example program is set up with the following operation conditions Initial values are used for conditions of operation other than the ones listed below They are not shown in this example Please modify the example program as needed Item Conditions of operation Alarm 1 set value 9 89 Upper limit deviation is set to 30 0 C Alarm 2 set value 50 490 Lower limit deviation is set to 30 0 C Operation mode 57 HOT Set 3 Monitor Alarm Control initial value Proportional band P 98 PID value Integral time I 100 Set by auto tuning Derivative time D 61 101 Control response parameter 462 4102 Set 1 Medium Normal reverse operation selection Transistor output selection 86 126 Set 0 initial value Input type 208 214 Set 1 K type 100 0 to 400 0 C Alarm 1 mode setting 209 215 Set 12 Upper limit deviation alarm with re wait Alarm 2 mode setting 210 216 Set 13 Lower limit deviation alarm with re wait Temperature rise completion range setting 236 Set 3
167. put cycle 30 sec CH1 70 Caution Handling numbers containing decimal places The set value should be the actual value multiplied by 10 8 2 35 BFM 71 BFM 111 BFM 151 BFM 191 Cooling control output period setting 98 To these buffer memories enter the control output MV cycle on the cooling side for heating cooling PID control The ON duration and OFF duration of the control output MV are as follows ON duration Control output cycle on cooling side sec x Control output value 96 OFF duration Control output cycle on cooling side sec x 100 Control output value 96 For an operation example of the control output cycle on the cooling side refer to Subsection 8 2 34 3 Initial Description ES range PID control 71 3111 151 191 0 Not used 300 R W e Heating cooling PID control 5 to 1000 0 5 to 100 0 sec 1 These buffer memories can be written only while heating cooling PID control is being performed Caution Handling numbers containing decimal places The set value should be the actual value multiplied by 10 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 36 BFM 72 BFM 112 BFM 152 BFM 192 Primary delay digital filter setting 3 To these buffer memories enter the primary delay digital filter for reducing fluctuations caused by noise in the S measured value MV The effect of noise is mitigated by setting the time constant
168. r Public service purposes shall be excluded from the programmable logic controller applications In addition applications in which human life or property that could be greatly affected such as in aircraft medical applications incineration and fuel devices manned transportation equipment for recreation and amusement and safety devices shall also be excluded from the programmable logic controller range of applications However in certain cases some applications may be possible providing the user consults their local Mitsubishi representative outlining the special requirements of the project and providing that all parties concerned agree to the special circumstances solely at the users discretion 147 Revised History FX3U 4LC User s Manual Revised History Date Revision Description 1 2010 A First Edition 5 2010 Errors are corrected FX3U 4LC USER S MANUAL a MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BUILDING 2 7 3 MARUNOUCHI CHYODA KU TOKYO 100 8310 JAPAN HIMEJI WORKS 840 CHIYODA CHO HIMEJI JAPAN 09R625 JY997D39101B Effective May 2010 MEE Specifications are subject to change without notice
169. r details on the control mode switch refer to Section 6 2 Conventional PID control When PID constants are set so that the response to changes in set value becomes good Response to changes in set value SV Response to disturbance Set value SV EN Set value SV When PID constants are so set that the response to disturbance becomes good Response to changes in set value SV Response to disturbance Set value SV Set value SV NA Easy PID control with two degrees of freedom Response to changes in set value SV Response to disturbance Fast 4 Medium Set value SV Set value SV NUMOS Slow FX3U 4LC User s Manual 6 Introduction of Functions Associated buffer memory BFM No Description 58 138 178 Proportional band P Heating proportional band P Subsection 8 2 22 60 100 140 180 Integral time I Subsection 8 2 24 61 101 141 181 Derivative time D Subsection 8 2 25 62 64 104 144 184 Output limiter upper limit Heating upper output limiter setting Subsection 8 2 28 65 142 182 Control response parameter 145 185 Output limiter lower limit 6 4 PID control 3 o e Reference 2 O x Subsection 8 2 26 O Sg Subsection 8 2 29 o 67 107 147 187 Output change ratio limiter Subsection 8 2 31 240 241 Control mode switch Subsection 8 2 62 6 4 2 Overshoot prevention function When a deviation
170. r function to OFF so that optimal PID constants can be calculated by auto tuning e When auto tuning is finished normally write newly calculated PID constants to the EEPROM using the set value backup command so that auto tuning becomes unnecessary from the next power ON When auto tuning is finished normally PID constants and loop breaking alarm judgment time are written to the buffer memory and then the AT execution flag turns OFF Because the AT execution command buffer memory does not become 0 automatically write 0 manually welbag CO Kioweyjseyng OO sojdwex Buyoousejqno CO 49 6 Introduction of Functions FX3U ALC User s Manual 6 8 Auto Tuning Function Associated buffer memory BFM No Description Reference 40 Flag b4 to b7 AT ST abnormal end flag Subsection 8 2 1 Event b14 AT auto tuning being performed Subsection 8 2 2 65 105 145 185 Output limiter lower limit Subsection 8 2 29 73 bs a Glen ratio limiter Subsection 8 2 37 78 118 158 198 os breaking alarm judgement time Subsection 8 2 42 254 Set value backup command Subsection 8 2 70 Caution C1 e While the setting change ratio limiter is operating auto tuning is started when the set value SV reaches the auto tuning point e f control is started while both the AT execution command buffer memory and ST execution command buffer memory are set to 1 auto tuning is performed e f the AT execution command buffer me
171. r in compliance with established safety practices The operators should also be familiar with documentation that is connected with the actual operation of the completed equipment Note the term completed equipment refers to a third party constructed device that contains or uses the product associated with this manual This product has been manufactured as a general purpose part for general industries and has not been designed or manufactured to be incorporated in a device or system used in purposes related to human life Before using the product for special purposes such as nuclear power electric power aerospace medicine or passenger movement vehicles consult with Mitsubishi Electric This product has been manufactured under strict quality control However when installing the product where major accidents or losses could occur if the product fails install appropriate backup or failsafe functions into the system When combining this product with other products please confirm the standards and codes of regulation to which the user should follow Moreover please confirm the compatibility of this product with the system machines and apparatuses to be used If there is doubt at any stage during installation of the product always consult a professional electrical engineer who is qualified and trained in the local and national standards If there is doubt about the operation or use please consult the nearest Mitsubishi Electric distributor S
172. r output limiter 5 0 past lower limit Low QN Caution These buffer memories handle numeric values containing decimal places and store the actual value multiplied by 10 In PID control these buffer memories store 0 Not used These buffer memories store the 5 0 past the lower limit of the span when control is stopped 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 0 BFM 17 to 20 Control output flag Bit O and bit 8 indicate the ON OFF status of the control output However the contents of control output vary depending on the setting of the control mode switch function and transistor output selection function When internal transistor outputs are assigned to the control output bit O and bit 8 indicate the transistor output status ON or OFF When internal transistor outputs are not assigned to the control output bit O and bit 8 indicate the output status ON or OFF in the arithmetic operation result in proportion to time control output cycle CH1 17 M Initial jerome L S qq RB Control output flag Refer to the following Control output flag Bit Bit Control mode Transistor output Contents of control output Control type Channel switch selection function Bit8 BitO Otot O to 1 Notused used Transistor output status Em E operation result Not used i in proportion to time PID control 2to3 102 o Notused Metue
173. reaking alarm status Balance less bump less function Heater disconnection alarm function Loop breaking alarm dead zone Reference Section 6 2 Section 6 3 Section 6 4 Subsection 6 4 2 Section 6 5 Section 6 6 Subsection 6 6 3 Subsection 6 6 4 Section 6 7 Subsection 6 7 3 Section 6 8 Subsection 6 8 2 Section 6 9 Section 6 10 Subsection 6 10 2 Section 6 11 Subsection 6 11 2 Section 6 12 Subsection 6 12 2 33 A uononpoJu uoneogoeds INQ wasis OO uoneJn amp ijuo uonejejsu m 5 E suonoun J jo uononpoau wey N welbaug QO Aow nyng OO s jdwex4 Bunoouseqnou CO 6 Introduction of Functions FX3U ALC User s Manual 6 2 Control Mode Switch Function 6 2 Control Mode Switch Function 34 The control mode switch function sets the control type PID control two position control manual control cascade control or heating cooling control and used input output external or internal for each control group Make sure to set the control mode before performing control Up to 4 loops are available for each control type However only up to 2 loops are available for cascade control Control groups are classified into the group 1 CH1 and CH2 and group 2 CH3 and CH4 Control mode Control mode Control type Input Output Internal i PID control intemal Internal 1 Two position control 2 Manual control Cascade control
174. rm judgement time 0 to 7200 sec 480 RW v A 79 119 159 199 Loop breaking alarm dead zone 0 to input span 0 RW v 80 120 160 200 Micro voltage input scaling upper limit 20000 to 20000 10000 Reverse between upper limit 481 121 4161 4201 Micro voltage input scaling lower limit and lower limit is not allowed RWI v Span should be 20000 or less 82 122 162 202 External input range upper limit 32000 to 32000 10000 Reverse between upper limit 83 123 163 203 External input range lower limit and lower limit is not allowed v 84 124 164 204 External output range upper limit 32000 to 32000 10000 Reverse between upper limit 85 125 165 205 External output range lower limit and lower limit is not allowed EEGI Buum QI o aS C ja pn 86 126 166 206 Transistor Transistor output selection selection 007 7 28 gt a gt amp 87 127 167 207 ST startup tuning execution command a IEEE Stops startup dna R W S Performs Startup tuning 9 208 220 226 Inputrange 0000 Inputrange 0000 00047 RY 210 228 Alarm 2 alarm mode Alarm 2 alarm mode setting e e New 1 3 Pose qune o o 0 Air cooling type 232 ee lL cooling method setting 1 Water cooling type RWI y PID control i ii 2 Cooling gain linear type 233 Alarm dead band setting 0 to 100 0 0 to 10 0
175. rnal Dimensions and Part Names ccccccccceececeeeeeeeecae eee eeseeeeseeeseeeeseeesaeeesaeesaneesaeeeseeeeaes 15 to Terminal AV OUE ec 16 1T 4 Power and Status LEDS ii reta eic potus eges ces tasa in pecca tot idees es tad st Ines Gap vvad ue prs 16 2 Specification 17 2 1 General SpeciliCallOrS 5 9 2 9 5922 592992 592020 5906902 5025 000 800 092 800 00000880 000 209 990 8 009 2 0 50 0 0 992 8 0 08 uoce 18 2 2 Power oupply SDeclIcallofiS a boe oed et eet rai ree eee oat e aid rues iebiarteoPic bass 18 2 3 Perfomance SpDeCITICaltlOFiS 55 95 99 9 5 9 8 00 0 00 2109 120 050500500200 ISOO0UURc N E DuDE od 18 ZA Input Specification wateceiti terete LU T TERES 19 2 4 1 Temperature input SPeCIFICATIONS ccc ccccceeccccseeececeeceeceeceeseeeeeceeeeceeeeseaueesseeessaaeessaeessaeeesaaes 19 2 12 Measurement Precis O Misrin Bootes o eee eden pu ec bec ten uuu v aUe atico tes USula Ux uU Cet e accuse e bue eus 20 2 4 3 Current detector CT input specifications essseeessseeseeeseeeeenneeenne nennen 20 29 eU hugo rcrum 21 20 GIU SDS CIC AMON Seyret eee eae eo E 21 3 System Configuration 22 SXNECIRGIe VIE EE LS LOL 22 SAPPE ADC ad NO RUN MR E D EE NR 23 SRM Gen n SC ONE ZU DM d E EH RE c 23 4 Installation 24 ATDIN ral MOUIN mr TT ean eee meee ee E 25 Z2 Direct MOUNN Girsan creat hetenaettaseeat esci bo teat estet itemads a a Ea 26
176. rror e Ladder error If the operations of the PLC are abnormal perform PLC diagnosis and program check with the programming tool An I O error parallel link communication error or operation error may have occurred OFF No errors to stop the PLC have occurred 144 Appendix A Version Information FX3U 4LC User s Manual Appendix A 1 Version Information UOneuuolu UOISJ9A Appendix A Version Information Appendix A 1 Version Information Appendix A 1 1 Version check method The 4LC version is shown as S N on the label attached to the right side of the module as seen from the front Nameplate simple figure MITSUBISHI roopan MODEL FXsu ALC Right side S N MADE IN JAPAN L 1 4010 Version Appendix A 1 2 Version upgrade history The table below shows the version upgrade history for the 4LC Version Contents of version upgrade Ver 1 00 First product 145 Appendix A Version Information FX3U 4LC User s Manual Appendix A 1 Version Information MEMO 146 FX3U 4LC User s Manual Warranty Warranty Please confirm the following product warranty details before using this product Gratis Warranty Term and Gratis Warranty Range If any faults or defects hereinafter Failure found to be the responsibility of Mitsubishi occurs during use of the product within the gratis warranty term the product shall be repaired at no cost via the sales representative or Mitsub
177. ry starts or stops control Write KO to stop control and select the monitor mode Write K1 to start the operation selected by the operation mode setting buffer memory The setting of this buffer memory is effective for all channels For details on the operation mode refer to Subsection 8 2 21 MEN EE RN value 0 Stops control e When the PLC main unit is changed over from RUN to STOP outputs of the 4LC are held In order to stop outputs of the 4L C make sure to use BFM 29 29 Caution e When the operation mode setting buffer memory is set to 0 Not used the measured value PV becomes 0 8 2 10 BFM 30 FX Series model code 82 The model code of the 4LC is stored Initial 30 The model code of the 4LC is K2090 K2090 EE WE Description Backup CH1 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 11 BFM 32 to 35 External output value Heating external output value monitor z When the control mode using external outputs is selected by the control mode switch function these buffer S memories store the control output processed within the output limit and scaled into the external output range For details on the control mode switch refer to Subsection 8 2 62 Description al Backup 2 Display range Caution When internal output is selected by a control mode change a control output value MV is stored For details on the control
178. s period 79 UOnOnpoJjU uoneogoeds INQ wasis QJ uoneinByuoy uonejejsu x Buum Ol o suonoun jo uononpoau 7 c 3 uei CO Kiowayy yng So duJex4 Bunoouseqnou CO 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 4 BFM 9 to 12 Control output value MV monitor Heating control output value MV monitor 8 2 5 In standard PID control these buffer memories store the control output value MV after PID arithmetic operation or control output value MV in MANUAL mode In heating cooling PID control these buffer memories store the heating control output MV after heating cooling PID arithmetic operation Description Initial eile Display range e PID control 10 11 12 Output limiter lower limit to Output limiter upper limit e Heating cooling PID control 50 to Heating upper output limiter 5 0 past lower limit Caution These buffer memories handle numeric values containing decimal places and store the actual value multiplied by 10 These buffer memories store the 5 0 past the lower limit of the span when control is stopped BFM 13 to 16 Cooling control output value MV monitor 80 In heating cooling PID control these buffer memories store the cooling control output value MV after heating cooling PID arithmetic operation Backup CH1 Description Initial veins Display range 50 to Cooling uppe
179. s possible to provide the dead band and overlap area at the point at which heating control and cooling control switch each other Select control mode 4 to 7 for performing heating cooling PID control For details on the overlap dead band refer to Subsection 6 6 3 For details on the control mode switch refer to Section 6 2 Operation Control output value MV Heating Cooling proportional proportional band band 100 Heating output value Cooling output value o Measured 0 value PV Set value SV Associated buffer memory BFM No Description Reference H9 10 11 12 Control output value MV monitor Heating control output value MV monitor 13 Cooling control output value MV monitor Subsection 8 2 5 58 138 178 Proportional band P Heating proportional band P Subsection 8 2 22 59 139 179 Cooling proportional band P Subsection 8 2 23 60 100 140 180 Integral time I Subsection 8 2 24 61 101 141 181 Derivative time D Subsection 8 2 25 62 102 142 182 Control response parameter Subsection 8 2 26 63 103 143 183 Overlap Dead band Subsection 8 2 27 64 104 144 184 Heating upper output limiter setting Subsection 8 2 28 66 106 146 186 Cooling upper output limiter setting Subsection 8 2 30 70 110 150 190 Heating control output period setting Subsection 8 2 34 71 111 151 191 Cooling control output p
180. s set values Buum Ol uogeyessu IE bem X000 7 o Q M100 M14 Initialization 3 Monitor Alarm Control completed initial value wey N Control response parameter 1 Medium Normal operation reverse operation 1 Reverse operation initial value Kowa seyng OO Loop breaking alarm dead zone 10 0 C Transistor output selection 0 initial value 1 o c c D 62 3 o o p E Q To next page To next page 133 FX3U 4LC User s Manual 9 Program Examples 9 2 Example of a Program for PID Control From previous page From previous page M100 M14 Alarm mode setting 1 CH1 K209 Upper limit deviation alarm with re wait Initialization completed Alarm mode settin g 1 CH2 flag D Upper limit deviation alarm with re wait Alarm mode setting 2 CH1 TO E KO K210 K13 K1 Lower limit deviation alarm with re wait a 7 Alarm mode setting 2 CH2 K216 Lower limit deviation alarm with re wait Alarm 1 set value Upper limit deviation 30 0 C vee Alarm 2 set value Lower limit deviation 30 0 C Temperature rise completion range 3 C CT monitor method ON current OFF current initial value CT ratio setting M8000 on SO To next page 134 Flag BFM 0 gt MO to M15 Event CH1 BFM 1 M20 to M35 Event CH2 BFM 2 M40 to M55 Measured value BFM 5 CH1 D5 BFM 6 CH2 gt D6 Control output value BFM 9 CH1 gt D9 BFM 10 CH2 D10 Hea
181. screw holes or wiring make sure that cutting and wiring debris do not enter the ventilation slits Failure to do so may cause fire equipment failures or malfunctions Be sure to remove the dust proof sheet from the PLC s ventilation port when installation work is completed Failure to do so may cause fire equipment failures or malfunctions Connect extension cables securely to their designated connectors Loose connections may cause malfunctions Turn off the power to the PLC before attaching or detaching the following devices Failure to do so may cause device failures or malfunctions Peripheral devices display modules expansion boards and special adapters O extension units blocks FX Series terminal block and the special function units blocks Battery and memory cassette The 4LC unit can be connected to the right side of the main unit extension unit or extension block To connect to an FX3uc PLC or FX2NC PLC extension block the FX2NC CNV IF or FX3uc 1PS 5V is necessary For details refer to the respective PLC manual Refer to the FX3G Hardware Edition Refer to the FX3u Hardware Edition Refer to the FX3uc Hardware Edition The 4LC may be installed in a control cabinet with a 35mm wide DIN46277 DIN rail mounting or M4 screw direct mounting Cautions in examining installing method When the system is laid out in two stages do not mount 4LC at the top of the second stage or FX2N CNV BC cannot be installed d
182. section 8 2 54 Caution Set this buffer memory before performing auto tuning because the setting affects arithmetic operation results of PID constants acquired by auto tuning 6 Introduction of Functions FX3U ALC User s Manual 6 7 Cascade control 6 7 Cascade control 6 7 1 Cascade control Cascade control combines master channel control and slave channel control into one control loop Cascade control is suitable for situations where there is a large time delay between the temperature near a heat source and the temperature of the object to be controlled The master channel performs PID arithmetic operation using the measured value PV of the control target or an external input value as the input converts the control output into the cascade signal using the cascade bias and cascade gain and then corrects the set value SV of the slave channel The slave channel performs PID control using the set value SV converted into the cascade signal Up to 2 control loops are available in the 4L C Set the control mode to 0 to 3 for performing cascade control The combination of available master channel and slave channel is determined for each control loop as shown below Control loop Master channel Slave channel Control output 1 Channel 1 Channel 2 OUT2 2 Channel 3 Channel 4 OUT4 For details on the control mode switch refer to Section 6 2 Cascade control block diagram reference This diagram shows an example
183. sponding to the connected PLC l uonejesu fe _ Refer to FX3G Hardware Edition gt Refer to FX3U Hardware Edition Refer to FX3uc Hardware Edition 5 g Other FX3G FX3U PLC extension FX3U 4LC units blocks Shows the reference The mark indicates a reference destination and reference manual suorpunJ jo uojonponuy C wey N Other FX3uc PLC extension FX3U 4LC units blocks FX2NC CNV IF An FX2NC CNV IF or FX3uc 1PS 5V is necessary to connect the 4LC with the FX3uc PLC The number of I O points occupied by the 4LC is eight Make sure that the total number of I O points occupied l O points of the main unit extension unit s extension block s and the number of points occupied by special function blocks does not exceed the maximum number of I O points of the PLC For information on the maximum number of I O points of the PLC refer to the respective product manual Refer to FX3sc Hardware Edition Refer to FX3u Hardware Edition l Refer to FX3uc Hardware Edition wesbog QO amp ouew eyng OO s jdwexg upoousegnu CO l 22 The above is different from the actual page as it is provided for explanation only 13 1 Introduction FX3U ALC User s Manual 1 1 Outline 1 Introduction 1 1 Outline The temperature control block FX3U 4LC hereinafter called 4LC equipped with 4 channel input thermocouples resistanc
184. t data error C1 52 6 Introduction of Functions FX3U ALC User s Manual 6 8 Auto Tuning Function 6 8 3 AT auto tuning bias 3 Set the auto tuning bias so that the measured value PV does not exceed the set value SV during auto S tuning The auto tuning function performs two position control using the set value SV hunts the measured value PV then calculates and sets each PID constant However for some control targets overshoot caused by 2 hunting is not desirable When the AT bias is set the set value SV AT point with which auto tuning is D performed can be changed 8 Example of operation When the AT bias is set to 9 Measured value PV Set value SV wasis GO AT bias uoneinByuoy AT point AT starts AT finishes Time uonejejsu x Associated buffer memory BFM No Em 5 escription eference om 1 Event b14 AT auto tuning being performed Subsection 8 2 2 E Caution When the set value SV added by the AT bias AT point value exceeds the setting limiter range the 4LC performs auto tuning using the setting limiter value e Ifthe setting change ratio limiter is set to any value other than 0 when auto tuning is started the set value SV changes in accordance with the setting of the setting change ratio limiter until the AT point When the set value reaches the AT point b14 Auto tuning being performed of the event buffer memory turns ON and auto tuning
185. t failures or malfunctions For repair contact your local Mitsubishi Electric distributor Turn off the power to the PLC before attaching or detaching the following devices Failure to do so may cause device failures or malfunctions Peripheral devices display modules expansion boards and special adapters O extension units blocks FX Series terminal block and the special function units blocks Battery and memory cassette 125 A uononpoJu uoneogoeds INQ wasis OO uoneJn6ijuo uonejejsu x Buum Ol o suojoun J jo uononpoau wey N Kowa seyng OO 1 o c c D 62 3 o o p E Q 9 Program Examples FX3U ALC User s Manual 9 1 Reading Writing Buffer Memory 9 1 Reading Writing Buffer Memory 9 1 1 Assigned unit number 1 Assigned unit number The unit number for the 4LC is automatically assigned No 0 to No 7 starting from the special function unit block closest to the PLC main unit e Inthe FX3G FX3u FX3uc D DSS series Unit No O Unit No 1 Unit No 2 FX3G FXau FX3uc D DSS Input output S ri Specie Input output Special function function function Main unit extension block block block extension block block n the FX3uc 32MT LT FX3uc 32MT LT 2 series builtin GC LIBKILT Unit No 1 Unit No 2 Unit No 3 FX3UC 32MT LT Special Special Special FX3uc 32MT LT 2 Input output function function InPuUoutput function MUn extension block Bock SISSE
186. t using transistor outputs built into the 4L C The transistor output built into the 4LC is controllable when transistor output selections 1 and 2 are chosen Additionally the outputs can also be used as alarm outputs For details on the external input value refer to Subsection 8 2 8 For details on the external output value refer to Subsection 8 2 11 or 8 2 12 For details on the transistor output selection refer to Subsection 8 2 50 Caution It is not possible to change the setting while control is being performed If the setting is changed while control is being performed the contents of setting are changed when control is stopped 8 Buffer Memory FX3U 4LC User s Manual 8 2 Buffer Memory Details 1 8 2 63 BFM 242 243 SV tracking selection The SV tracking selection function makes the slave channel set value SV track the set value value stored in S the set value monitor buffer memory just before changeover to cascade OFF when the cascade control function is changed from ON to OFF Write KO to disable the tracking function 2 Write K1 to enable the tracking function D Control group 1 GR1 The setting is applied to CH1 and CH2 S Control group 2 GR2 The setting is applied to CH3 and CH4 8 For details on the cascade control refer to Section 6 7 S For details on the set value monitor refer to Subsection 8 2 13 For details on the set value SV refer to Subsection 8 2 15 Initial
187. ted and becomes saturated at the output limiter upper limit or output limiter lower limit Before starting startup tuning confirm that the difference between the measured value PV and the set value SV is twice or more the proportional band The AT execution command buffer memory is set to 0 Stops AT The AT ST abnormal end flag is 0 OFF Conditions for aborting ST startup tuning If any of the following conditions are satisfied while startup tuning is being performed startup tuning is forcibly aborted and the AT ST abnormal end flag turns ON Input value error upper limit or lower limit occurs The control start stop changeover function is changed to 0 Stops control The AUTO MANUAL mode changeover function is changed to 1 MANUAL mode The operation mode is changed to any setting other than 3 Monitor Alarm Control The sensor correction value is changed The primary delay digital filter setting is changed The value stored in the output limiter upper limit buffer memory or the value stored in the output limiter lower limit buffer memory is changed The proportional band setting is changed to 0 0 two position control A calculated PID constant acquired by startup tuning exceeds the setting range Proportional band 0 1 to 1000 0 Integral time 1 to 3600 Derivative time 0 to 3600 The ST execution command buffer memory is set to 0 Stops ST AT ST abnormal end flag does not turn
188. temperature control block 09R625 10 FX3U ALC User s Manual Generic Names and Abbreviations Used in the Manual Generic Names and Abbreviations Used in the Manual Generic name or abbreviation Description PLC FX3G series Generic name for FX3G Series PLC Generic name for FX3G Series PLC main unit FX3U series Generic name for FX3u Series PLC Generic name for FX3U Series PLC main unit FX3UC series Generic name for FX3uc Series PLC FX3uc PLC or main unit Generic name for FX3UC Series PLC main unit Expansion board Generic name for expansion board The number of connectable units however depends on the type of main unit To check the number of connectable units refer to the User s Manual Hardware Edition of the main unit to be used for your system Expansion board Special adapter Generic name for high speed input output special adapter communication special adapter analog special adapter and CF card special adapter Special adapter The number of connectable units however depends on the type of main unit To check the number of connectable units refer to the User s Manual Hardware Edition of the main unit to be used for your system Extension equipment Generic name for input output powered extension unit and input output extension block The number of connectable units however depends on the type of main unit To check the number of connectable units refer to the User s Manual Hardware Edition of th
189. tence tue dS LOT UOS d eae ELO 68 20 RANGE QIAN eere RE eines nina POE SDA UU CE irem a roses a 69 T 2 f Alarm WalboDelallobia sd iunii e cust F dur OLLI DUE ID OL caer nid ufu cue 69 1220 7 armEreswalt oDelr altlO i cissi dp io a usui dubios a a a ausu oodd aaeain 70 7 3 Alarm Dead Zone Setting cccccscccccsssceccssceccessecceeucecsegeeececeueeesseueessageeessaeeessageeessseeessssegeeesas 71 7 4 Number of Times of Alarm Delay eeessssesesseeeee nennen nennen nnnm nnne nnne nnn enn nna nnns 72 FX3U 4LC User s Manual 8 Buffer Memory 73 ed Bummer Memory isl uan irae eoa bdechdet on eed ibdecides ideato Ns oat idolo ao s Loose doaio dcs iode 73 0 2 Butter Memory DetallS 2 2 9 5999992 99949 85 5923 222 3028509099500 306 0 8 00 9 400 95209920 0900280 s mOBS AU UE Saget 77 22 MA es F lt OLFA 1o ME ne en cP ge ed ete eer ee er re ee eee ere eee 77 O22 BENI AOA BVOLID ou e E ca Ola pac aaah aed Jemlraae aaah a ss tulsssde Tum nde ias 78 8 2 3 BFM 5 to 8 Measured value PV sese 79 8 2 4 BFM 9 to 12 Control output value MV monitor Heating control output value MV monitor sssseeesesseseseeeeee nee 80 8 2 5 BFM 13 to 16 Cooling control output value MV monitor seeeeesseeeeeeeeeen 80 9 2 6 BEMZT7 16 20 Control output Tag sie sesto os Ret E eee tovto tes eda ee an 81 8 2 7 BFM 21 to 24 Heater current measured value
190. ter current measured value BFM 21 CH1 gt D21 BFM 22 CH2 gt D22 Set value range error address BFM 252 D252 To next page 9 Program Examples FX3U ALC User s Manual 9 2 Example of a Program for PID Control 3 From previous page From previous page Initializes all data S X001 When X001 is set to ON all data is initialized Performs initialization ici When initialization is not 2 necessary this line can be T omitted amp X002 2 K1 S Disables error reset wje PDE C Oana o 2 When X002 is set to ON all errors indicated by the flag X002 BFMZO are reset Performs error reset Starts stops control When X003 turns OFF control stops X003 Stops control starts In order to turn OFF the control output this line is required and X003 cannot be omitted KO K29 K1 K1 The control output cannot be Starts control set to OFF by changeover from RUN to STOP of the PLC wasis OO uoneJn6iuo uonejejsu x M100 M14 main unit Initialization mode is used completed When changeover of the mode is necessary write K1 to flag BFM 54 and BFM 94 in changeover condition When X004 X005 is set to ON M34 iR auto tuning is performed erotic continues even if X004 X005 is being performed CH1 set to OFF after that Buum Ol o M54 When the flag M34 M54 turns E vea e e e AH ee i Auto tuning is performed it is judged that auto 88 being performed CH2 tuning
191. th re wait However when control is started and when set value is changed the measured value is ignored 14 Caution It is not possible to change the setting while control is being performed If the setting is changed while control is being performed the contents of setting are reflected when control is stopped 8 2 54 BFM 232 Cooling method setting 112 To these buffer memories set the cooing method for performing heating cooling PID control Select the cooling method among air cooling type water cooling type and cooling gain linear type in accordance with the cooling unit Because the cooling characteristics are considerably different between the air cooling method and the water cooling method PID constants suitable to the cooling unit can be obtained by setting the cooling method before starting auto tuning The selected cooling method is applied to all channels For details on the cooling method refer to Subsection 6 6 4 Initial Description value kj range PID control 0 Not used Heating cooling PID control 0 Air cooling type 1 Water cooling type 2 Cooling gain linear type 1 GR1 and GR2 can be written only while heating cooling PID control is being performed Caution Set the cooling method before performing auto tuning because the setting affects arithmetic operation results of PID constants acquired by auto tuning 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Mem
192. the setting of the SV tracking selection buffer memory Control group 1 GR1 The setting is applied to CH1 and CH2 Control group 2 GR2 The setting is applied to CH3 and CH4 For details on the cascade control refer to Section 6 7 For details on the SV tracking selection refer to Subsection 8 2 64 Initial e s range PID control 0 Cascade OFF 1 Cascade ON Heating cooling PID control 0 Not used 1 These buffer memories can be written only while standard PID control is being performed CH1 Caution e Cascade control is disabled when heating cooling PID control is selected Auto tuning and startup tuning are disabled while cascade control is being performed 8 2 65 BFM 246 247 Cascade gain 120 To these buffer memories set the gain used during cascade control when the control output MV from the master channel is added to the cascade bias converted into the full scale of the slave channel input range and then converted into the cascade signal Control group 1 GR1 The setting is applied to CH1 and CH2 Control group 2 GR2 The setting is applied to CH3 and CH4 For details on the cascade control refer to Section 6 7 For details on the cascade bias refer to Subsection 8 2 66 Description nal value micas Setting range e PID control 10000 to 10000 10 000 to 10 000 times 1000 2 R W 1 Heating cooling PID control 0 Not used 1 These buffer
193. to 100 0A ce AUTO mode 134 174 AUTO MANUAL mode changeover MANUAL mode o wis 50 to 1050 135 175 MANUAL output set value 5 0 to 105 0 Rw e 0 Stops Auto turning 136 176 AT auto tuning execution command 1 Performs Auto turning po Rw 137 177 Operation mode 0 Not used 1 Monitor 2 Monitor Alarm B xp 3 Monitor Alarm Control PID control Proportional band P 30 LEES e 0 to 10000 0 0 to 1000 0 of 98 138 178 Heating cooling Heating proportional band P Span EN a e PID control Sp PID PID control Notused used 99 139 179 Lic NIE a to 10000 0 1 to 1000 EM INL PID control Cooling proportional band R W ae 102 142 182 Control response parameter 103 104 105 106 107 108 143 144 145 146 147 148 0 Slow 1 Medium RIW vy 2 Fast 183 a 100 to 100 PID control ula Dead Dand 10 0 to 10 0 of span nw Output limiter lower limit 1 PID control Output limiter upper limit to 1050 to 105 0 1000 Heating cooli Heati tput limit ESL eating cooling eating output limiter upper 4 to 1050 0 0 to 105 0 4000 PID control limit 50 to PID control Output limiter lower limit ae limiter upper limit 1 R W 185 5 0 to Heating cooling PID PID control Notused used 186 lc c ERR output limiter a T 0 to 1050 0 0 to 105 0 1000
194. to 2mm 1 to 2mm 0 04 to 0 08 0 04 to 0 08 9K H id i Oth er d roses les FX3u ALC extension equipment shows the M4 screw 5 Wiring FX3U ALC User s Manual h ENEN 1 i O e mg a e 9 Wiring WIRING PRECAUTIONS co DANGER g Make sure to cut off all phases of the power supply externally before attempting wiring work 3 2 Failure to do so may cause electric shock WIRING PRECAUTIONS N CAUTION Connect the AC power supply to the dedicated terminals specified in this manual If an AC power supply is connected to a DC input output terminal or DC power supply terminal the PLC will burn out Do not wire vacant terminals externally Doing so may damage the product Use class D grounding grounding resistance of 100 or less with a wire of 2mm or thicker on the grounding terminal of the PLC However do not connect the ground terminal at the same point as a heavy electrical system When drilling screw holes or wiring make sure cutting or wire debris does not enter the ventilation slits Failure to do so may cause fire equipment failures or malfunctions Make sure to observe the following precautions in order to prevent malfunctions under the influence of noise Do not bundle the power line or twisted shielded cable together with or lay it close to the main circuit high voltage line or load line Otherwise noise disturbance and or surge induction are li
195. to any value other than O the alarm waiting operation is disabled when the set value SV is changed uoneJn6ijuo 7 2 1 Upper limit input value alarm uonejejsu x When the measured value PV is more than the alarm set value an alarm is issued Measured value PV Measured value PV Buum Ol Alarm set value Time o Non alarm status A C Aarm staus _ Alarm status El otc gt a n oO 9 7 2 2 Lower limit input value alarm When the measured value PV is less than the alarm set value an alarm is issued Measured value PV xc Measured value PV Alarm set value UJ c T Time Non alarm status 3 Aarm status NN Alarm status mm E Oo v o 3 o Bunoouseqnou CO 67 7 Alarm 7 2 Alarm Functions FX3U 4LC User s Manual 7 2 3 Upper limit deviation alarm When the deviation Measured value PV Set value SV is more than the alarm set value an alarm is issued When the deviation is positive When the deviation is negative Measured value PV Measured value PV 4 Measured value PV Measured value PV Alarm set value Set value SV Deviation Deviation Set value SV Alarm set value Time Time Non alarm status Alarm status 7 2 4 Lower limit deviation alarm When the deviation Measured value PV Set value SV is less than the alarm set value an alarm is issued When the dev
196. to the buffer memory BFM 25 in the unit No 1 amp Write sj command FNC 12 EE ees Des H Transfer source L Buffer memory No e Unit No c Writing the current value of data registers to the buffer memory S In the program below the current value of data register D10 is written to the buffer memory BFM 25 in the unit No 1 Write command ENC 12 Transfer source e o pam Buffer memory No Unit No 2 FROM TO instructions conventional method Read and write the contents of the buffer memory using the FROM TO instructions a Reading and transferring numeric values to data registers FROM instruction In the program below the contents of the buffer memory BFM 5 in the unit No 1 are read and transferred to data registers DO wasis QJ uoneinByuoy uonejejsu x Read command FNC 78 Unit No a of transfer points Buffer memory No Transfer destination b Writing numeric values to the buffer memory TO instruction Buum QI o uz In the program below K32 000 is written to the buffer memory BFM 25 in the unit No 1 2 8 Write e Q command FNC 79 Unit No LS NUSbEE of transfer points Buffer memory No Transfer source c Writing the current value of data registers to the buffer memory TO instruction In the program below the current value of data register D10 is written to the buffer memory BFM 25 in the unit No 1 wey N Write command ENC 79 Unit No e 0 La Num
197. tops control 29 Control start stop changeover x6 tate conirol o RW 30 FX Series model code K2090 2090 ESES ii Notused LC LLL Bunoouseqnou CO 73 8 Buffer Memory FX3U 4LC User s Manual 8 1 Buffer Memory List 74 32 36 40 44 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 BFM No i Description set range E Remarks PID PID control External External output value monitor value monitor External output value monitor External output range tome 33 34 35 hcl Heating external output value limit to External output range PID control monitor upper limit 39 Heating cooling PID control Poems nep 0 3 37 38 41 42 43 Set value monitor Setting limiter lower limit to Setting limiter upper limit External output range lower Cooling external output value limit to External input range monitor bc upper limit 47 Control mode monitor mode monitor Refer to Subsection 8 2 14 to Subsection 8 2 14 88 128 168 Set value SV Eie INSERIRE Wate ower IMAN IG RWIiy lA Setting limiter upper limit 129 169 Alarm 1 set value A 130 170 Alarm 2 set value Allowable set range varies A depending on alarm mode and R W 132 172 Alarm 4 set value A 0 to 1000 133 173 Heater disconnection alarm set value 0 0
198. tput in proportion to the change in speed of the measured value PV to prevent an increase in the deviation difference between the set value SV and the measured value PV Because derivative operation responds to the rate at which the measured value PV changes the response to disturbances noise in measured value caused by external factors is improved The derivative time refers to the time in which the control output given by proportional operation is obtained only by derivative operation while the deviation increases and decreases at a constant ratio As the derivative time increases the derivative effect increases s Initial were 0 emm e ml on a ae Setigraroe e oa 8 RW Caution Backup CH1 When O is entered the derivative time D setting is invalid 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 26 BFM 62 BFM 102 BFM 142 BFM 182 Control response parameter z To these buffer memories set the control response parameter S Select the response to changes in the set value SV in PID control among three steps slow medium and fast Write KO to specify Slow 2 Write K1 to specify Medium D Write K2 to specify Fast 8 Backup 9 Description Initial vale 0 Slow 102 142 182 1 Medium 2 Fast Explanation of operation 62 wasis QJ uoneJn6ijuo Measured value PV K2 Fast K1 Medium uonejejsu x Set
199. two position control The cascade ON OFF set to 0 Cascade OFF The AT ST abnormal end flag is O OFF Conditions for aborting AT auto tuning If any of the following conditions are satisfied while auto tuning is being performed auto tuning is forcibly aborted and the AT ST abnormal end flag turns ON Input value error upper limit or lower limit occurs The set value SV is changed The control start stop changeover function is changed to 0 Stops control The AUTO MANUAL mode changeover function is changed to 1 MANUAL mode The operation mode is changed to any setting other than 3 Monitor Alarm Control The AT bias is changed The sensor correction value is changed The primary delay digital filter setting is changed The value stored in the output limiter upper limit heating output limiter upper limit buffer memory the value stored in the cooling output limiter upper limit buffer memory or the value stored in the output limiter lower limit buffer memory is changed The proportional band setting is changed to 0 0 two position control A calculated PID constant acquired by auto tuning exceeds the setting range Proportional band heating proportional band and cooling proportional band 0 1 to 1000 0 Integral time 1 to 3600 Derivative time 0 to 3600 The AT execution command buffer memory is set to 0 Stops AT AT ST abnormal end flag does not turn ON Power failure occurs AT
200. ty liability Regardless of the gratis warranty term Mitsubishi shall not be liable for compensation of damages caused by any cause found not to be the responsibility of Mitsubishi loss in opportunity lost profits incurred to the user or third person by Failures of Mitsubishi products special damages and secondary damages whether foreseeable or not compensation for accidents and compensation for damages to products other than Mitsubishi products replacement by the user maintenance of on site equipment start up test run and other tasks Changes in product specifications The specifications given in the catalogs manuals or technical documents are subject to change without prior notice Product application 1 In using the Mitsubishi MELSEC programmable logic controller the usage conditions shall be that the application will not lead to a major accident even if any problem or fault should occur in the programmable logic controller device and that backup and fail safe functions are systematically provided outside of the device for any problem or fault 2 The Mitsubishi programmable logic controller has been designed and manufactured for applications in general industries etc Thus applications in which the public could be affected such as in nuclear power plants and other power plants operated by respective power companies and applications in which a special quality assurance system is required such as for Railway companies o
201. ual measured value Time Caution Handling numbers containing decimal places The set value should be the actual value multiplied by 100 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 33 BFM 69 BFM 109 BFM 149 BFM 189 Adjustment sensitivity dead zone setting To these buffer memories enter the adjustment sensitivity dead zone to prevent chattering of the control output MV around the set value SV during two position control The value entered to these buffer memories is divided into two and distributed upward and downward around the set value SV For details on the set value SV refer to Subsection 8 2 15 Initial Description value Setting range 1 to 100 0 1 to 10 0 of span 1 Input span for internal temperature input Scaling span for internal micro voltage input External input span for external input 69 Example of operation When the input range span is 400 C and the adjustment sensitivity dead zone is set to 10 400 C x 10 0 96 100 40 C When the set value is 200 C the range from 180 to 220 C is handled as the dead zone 20 C The adjustment sensitivity dead zone is set to 40 C oc 40 C is divided into two and distributed upward and downward SSeS eicit around the set value SV Set value SV 200 C 180 C ON Control output MV OFF Time Caution e Handling numbers containing decimal
202. ue backup error ui q flag BFM 0 b3 OFF Explanation of operation Buum QI 1 When K1 is written to BFMZ254 Set value backup command the Set value being backed up flag turns ON When backup of the set values is completed the Set value being backed up flag turns OFF After that write O for setting to OFF to BFM 254 Set value backup command 2 If BFMZ254 Set value backup command is set to OFF while the Set value being backed up flag is ON o the Set value backup error flag turns ON In this case perform the operation described in 3 53 3 If BFM 254 Set value backup command is set to OFF while the Set value backup error flag is ON the 88 Set value being backed up flag turns ON When backup of the set values is completed the Set value o being backed up flag turns OFF After that write O for setting to OFF to BFM 254 Set value backup command For details on the flag refer to Subsection 8 2 1 7 c 3 Point When the power is turned ON the 4LC transfers the contents of the EEPROM to the buffer memories for using them as the set values for control Accordingly if the set values are written once to the EEPROM it is unnecessary from the next power ON to write the set values to the buffer memory The 4LC can start control immediately when the control start stop changeover buffer is set to 1 Starts control For details on the control start stop changeover refer to Subsection 8 2 9
203. ured value PV does not increase at least by loop breaking change output limiter upper limit criteria within loop breaking alarm judgement time an alarm is issued PID control normal operation When output is less than 0 or When measured value PV does not decrease at leas by loop breaking change output limiter lower limit criteria within loop breaking alarm judgement time an alarm is issued When output is more than 100 or When measured value PV does not increase at least by loop breaking change output limiter upper limit criteria within loop breaking alarm judgement time an alarm is issued 2 The variation range for loop breaking alarm judgment is fixed as follows and cannot be changed 2 0 C for internal temperature input 0 296 of the scaling span for internal micro voltage input 0 2 of the external input span for external input Caution The loop breaking alarm function judges abnormalities in the control loop but cannot detect positions in which abnormalities occur Check each part of the control system in turn e When the AT auto tuning function is completed the loop breaking alarm judgement time is automatically set to the integral time result multiplied by 2 e Set the time in which the measured increments changes by 2 0 C or 0 2 of the span or longer as the loop breaking alarm judgment time If the loop breaking alarm judgement time is too short or is not suitable to control targets the loop breaking alarm
204. utput OFF is displayed without regard to the setting of this buffer memory while control is stopped wasis QJ uoneJn6ijuo CH1 Caution uonejejsu x 8 2 61 BFM 239 CT ratio setting Buum Ol To this buffer memory set the number of secondary turns in the used current detector CT The setting is applied to all channels Description Initial s 239 Setting range 1 to 9999 Backup CH1 o 15 1 Make sure that the set value satisfies the following expression S si Sg Maximum value of postulated effective current x 1 1 g m Cc cH 2 x 3 77 0 715 9 CT ratio setting Reference examples of current detector CT 7 c 3 CT type CT ratio set value CTL 6 P H 800 CTL 12 S36 8 800 CTL 12 S56 10 1000 Manufactured by U R D Co Ltd w T z Caution 2 m The current value is not displayed correctly if the number of secondary turns in the used current detector CT and CT ratio setting are different 9 ux I 3 Bunoouseqnou CO 117 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 62 BFM 240 241 Control mode switch 118 To these buffer memories set the control type standard PID control two position control manual control cascade control or heating cooling control and used inputs outputs external or internal for each control group Control groups are classified into group 1 CH1
205. utput value MV x cascade gain cascade bias x slave channel of input span Control group 1 GR1 The setting is applied to CH1 and CH2 Control group 2 GR2 The setting is applied to CH3 and CH4 For details on the cascade control refer to Section 6 7 For details on the cascade gain refer to Subsection 8 2 65 o uz m m cet For details on the cascade bias refer to Subsection 8 2 66 ag 25 Dia ae Initial o GR1 8251 Display range 32000 to 432000 L9 R Caution 7 c 3 These buffer memories store 0 while cascade control is OFF uei CO Kiowayy yng So duJex4 Bunoouseqnou CO 121 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 68 BFM 252 Set value range error address When a value written to each buffer memory is outside the setting range the set value range error flag b1 turns ON and this buffer memory BFM 252 stores the buffer memory number where the error has occurred The setting is applied to all channels Check the setting range of the memory number where the error has occurred set a normal value and then execute the error reset command For details on the flag refer to Subsection 8 2 1 For details on the error reset command refer to Subsection 8 2 69 NENNEN el value 0 Normal 1 to 255 Setting error address This buffer memory stores 0 when no error has occurred CH1 252 Caution
206. value SV 2 PR Changed KO Slow Buum Ol Set value SV 1 Time ES 6 Set value SV change point ae 38 e Set value Description 0 Slow Set this value to restrain the overshoot 7 1 Medium The overshoot is smaller than 2 Fast z 2 Fast Set this value to reduce the rising time that is to start operation early 3 Note that some overshoot cannot be avoided welbag CO Kiowayy yng sojdwex Bunoouseqnou CO 91 8 Buffer Memory FX3U ALC User s Manual 8 2 Buffer Memory Details 8 2 27 BFM 63 BFM 103 BFM 143 BFM 183 Overlap Dead band To these buffer memories set the range of the overlap area or dead band for heating cooling PID control Enter a value in the range from 100 to 1 negative value to set the overlap area Enter a value in the range from 1 to 100 positive value to set the dead band Set 0 not to use the overlap area or dead band For details on the overlap dead band refer to Subsection 6 6 3 CH1 CH3 Setting range PID control 63 103 143 183 0 Not used e Heating cooling PID control 100 to 100 10 0 to 10 0 of span 1 Input span for internal temperature input Scaling span for internal micro voltage input External input span for external input 2 These buffer memories can be written only while heating cooling PID control is being performed Explanation of operation Overlap The proportional band o
207. xample if the loop breaking alarm dead zone is set to 10 C 10 C above the set value SV and 10 C below the set value SV are treated as the non alarm status region width of 20 C in total Example of operation LBD operation gap LBD operation gap n Pa Non alarm status region gt e Loop breaking ON alarm function 4 Alarm status region e B Alarm status region Loop breaking OFF N alarm function N Temperature fall Temperature rise Set value SV LBD set value 1 While the temperature is rising Alarm status region While the temperature is decreasing Non alarm status region 2 While the temperature is rising Non alarm status region While the temperature is decreasing Alarm status region 3 Loop breaking alarm dead zone operation gap 0 8 C for internal temperature input 0 8 of the scaling span for internal micro voltage input 0 8 of the external input span for external input Associated buffer memory 65 105 145 185 Output limiter lower limit Subsection 8 2 29 Caution e While the measured value PV is located within the non alarm region alarm is not issued even if the alarm condition is satisfied n heating cooling PID control the loop breaking alarm dead zone is invalid 7 Alarm FX3U 4LC User s Manual 7 1 Alarm List h T Alarm j The 4LC is equipped with 14 types of alarms Four types of alarms alarm 1 to
208. xecution flag turns OFF Because the ST execution command buffer memory does not become 0 2 automatically write 0 manually However it is not necessary to set the ST execution command buffer memory to 0 if startup tuning should be started when the set value SV is changed Associated buffer memory BFM No Description Reference Flag b4 to b7 AT ST abnormal end flag Subsection 8 2 1 1 2 3 g4 Event Subsection 8 2 2 b11 ST startup tuning being performed NE 61 101 141 181 Derivative time D Subsection 8 2 25 65 105 145 185 Output limiter lower limit Subsection 8 2 29 Caution wasis GO uoneinByuoy uonejejsu x 5 E e Startup tuning is enabled only in PID control Make sure to turn ON the heater at the same time or before starting startup tuning if startup tuning should be started at the start of control Before starting startup tuning confirm that the difference between the measured value PV and the set value SV is twice or more the proportional band e f control is started while both the AT execution command buffer memory and ST execution command buffer memory are set to 1 auto tuning is performed e Ifthe AT execution command buffer memory is set to 1 while startup tuning is being performed startup tuning is aborted and auto tuning is started e f startup tuning is performed while the output change ratio limiter is set to any value other than
209. xiliary relays M20 to M35 is written to the buffer amp memory BFM 518 in the unit No O z g Write command FNC 12 k4M20 uoiG518 Transfer source 0 wasis QJ uoneinByuoy Buffer memory No File 06 Unit No d Writing the bit information stored in data registers to the buffer memory In the program below the ON OFF status of each bit of a data register D201 is written to the buffer memory BFM 518 in the unit No 0 Each bit of the data register D201 should be set to ON or OFF in advance by bit specification of word devices uonejejsu x Buum Ol o Write cz command FNC 12 23g D201 UoGs518 T o oO 2 e Transfer source 0 Buffer memory No HEO Unit No wey N 2 FROM TO instructions conventional method Read the contents of the buffer memory using the FROM TO instructions a Reading and transferring the bit information to auxiliary relays In the program below the contents of the buffer memory BFM 0 in the unit No 1 are read and transferred to auxiliary relays M40 to M55 Read command ENC 78 Unit No e La Number of transfer points Buffer memory No Transfer destination UJ c s D 3 o lt M40 x d La m 23 p 3 o M41 z M55 2 Oo p D r 8 a 129 9 Program Examples FX3U 4LC User s Manual 9 1 Reading Writing Buffer Memory b Reading and transferring the bit information to data registers In the program below the cont
210. xternal output of the state of the loop disconnection alarm b8 of CH2 Setting value CH1 is stored Setting value CH2 is stored Measured value CH1 is stored Measured value CH2 is stored Control output value CH1 is stored Control output value CH2 is stored Heater current measured value CH1 is stored Heater current measured value CH2 is stored The value of a set value range error address is stored 9 Program Examples FX3U 4LC User s Manual 9 2 Example of a Program for PID Control 1 9 2 4 Sequence program 3 The sequence program for the example program with the FX3U ALC as unit No 0 is shown below Change S unit No O to match the actual system configuration to be used The FROM TO instructions are used for read write of buffer memory For details on the unit No refer to Subsection 9 1 1 2 For details on the how to read write from to buffer memory refer to Subsection 9 1 2 D For details on the system configuration refer to Subsection 9 2 1 m For details on the conditions of operation refer to Subsection 9 2 2 8 For details on the device assignments refer to Subsection 9 2 3 S M8002 ce Initial pulse 100 0 C set to DO and D1 asa set value M8000 ce Le Lo a RUN monito X000 M15 x Temperature Input type selection control ready Type K 100 0 to 400 0 C Control mode switch Initialization command TO D KO K255 K2 K1 2 SET M100 uoneJn6ijuo wasis OO Write

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