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FX2N-2LC Temperature Control Block USER'S MANUAL

1. M8002 MOV K1000 DO MOV K1000 D1 M8000 TO KO K 12 DO K 1 TO KO K 21 D1 K 1 M15 TO KO K 13 K 30 K 1 Temperat ure control TO KO K22 K30 K 1 ready flag TO KO K14 K 30 K 1 TO KO K 23 K 30 K 1 TO KO K 32 K2 K 1 TO KO K 51 K2 K 1 B KO K 36 K 1 K 1 TO KO K 55 K 1 K 1 TO KO K 46 K 1 K 1 KO K 65 K 1 K 1 F KO K 47 K4000 TO KO K66 K4000 TO KO K 48 K 1000 TO KO K 67 K 1000 TOBB KO K 50 K100 K 1 TO KO K 69 K100 K 1 V Sets 100 0 C as the set value Writes the set values While the PLC is running the set values can be changed using DO and D1 Alarm 1 set value Upper limit deviation 30 C Alarm 2 set value Lower limit deviation 30 C Operation mode Monitor Temperature alarm Control initial value Control response parameter Medium Normal operation reverse operation Reverse operation initial value Setting limiter upper limit 400 0 C for both channels Setting limiter lower limit 100 0 C for both channels Loop breaking alarm dead zone 10 C 4 MITSUBISHI 8 4 FX2N 2LC Temperature Control Block Program Example 8
2. 7 25 7 2 36 BFM 77 Number of times of alarm 1 2 3 4 7 26 7 2 37 BFM 78 Number of times of heater disconnection alarm delay 7 26 7 2 38 BFM 79 Temperature rise completion range setting 7 27 7 2 39 BFM 80 Temperature rise completion soak 7 27 7 2 40 BFM 81 CT monitor method changeover 7 28 7 2 41 BFM 82 Set value range error address 7 28 7 2 42 BFM 83 Set value backup 7 29 8 Program Example su wa pei erased Cei 8 1 8 1 Program example ae 8 2 SUG cece NN E 9 1 MITSUBISHI vii FX2N 2LC Temperature Control Block Introduction 1 1 Introduction 2 Product Configuration 3 Specifications 4 Wiring 5 Introduction of Functions 6 Alarm 7 Buffer Memory BEM 8 Program Example 9 Diagnostic MITSUBISHI FX2N 2LC Temperature Control Block Introduction 1 MITSUBISHI FX2N 2LC Temperature Control Block Introduction 1 1 Introduction Cautions on design A Install a safety circuit outside the PLC or the temperature control block FX2n 2LC so that the entire system conservatively oper
3. M15 E TO KO K 70 K 1 K 1 Temperat ure control TO KO K 71 K 1 K 1 ready flag TO KO K72 K12 K 1 TO KO K73 K13 K 1 TO KO K 79 K3 K 1 TOM KO K 81 KO K 1 M8000 E FROM KO KAMO K1 FROM KO K4M20 K1 FROM K2 K4M40 K1 FROM KO K3 D3 K2 FROM KO K5 D5 K2 FROM K7 D7 K2 FROM KO K82 D82 K 1 Input type selection Type K 100 0 to 400 0 C for both channels Alarm mode setting Upper limit deviation alarm with re wait Alarm mode setting Lower limit deviation alarm with re wait Temperature rise completion range 3 C CT monitor method ON current OFF current initial value Flag 40 MO to M15 Event CH1 BFM 1 gt M20 to M35 Event CH2 BFM 2 M40 to M55 Temperature measured value PV BFM 3 CH1 D3 BFM 4 CH2 gt D4 Control output value MV BFM 5 gt D5 BFM 46 2 D6 Heater current measured value 7 CH1 gt D7 BFM 8 CH2 gt D8 Set value range error address BFM 82 082 MITSUBISHI 8 5 FX2N 2LC Temperature Control Block Program Example 8 X000 TO KO K9 KO K 1 Disables initialization X000 1 TO KO K9 K 1 K 1 Performs initialization X001 TO KO K 10 KO K 1 Disables error reset X001 TOT KO K
4. 7 12 7 2 22 BFM 39 and BFM 58 CH2 Output change ratio 7 13 7 2 23 BFM 40 CH1 and BFM 59 CH2 Sensor correction value setting PV bias 7 14 7 2 24 41 CH1 and BFM 60 CH2 Adjustment sensitivity dead zone setting 7 15 7 2 25 BFM 42 and BFM 61 CH2 Control output cycle setting 7 15 7 2 26 BFM 43 and BFM 62 CH2 Primary delay digital filter setting 7 16 7 2 27 BFM 44 and BFM 63 CH2 Setting change ratio limiter 7 17 7 2 28 BFM 45 and BFM 64 CH2 AT auto tuning 7 18 7 2 29 BFM 46 and BFM 65 CH2 Normal reverse operation selection 7 18 7 2 30 47 CH1 and BFM 66 CH2 Setting limiter upper limit BFM 48 and BFM 67 CH2 Setting limiter lower limit 7 19 7 2 31 BFM 49 and BFM 68 CH2 Loop breaking alarm judgement time 7 20 7 2 32 In BFM 50 set the loop breaking alarm dead zone of CH1 In BFM 69 set the loop breaking alarm dead zone of CH2 7 21 7 2 33 BFM 70 and BFM 71 CH2 Input type selection 7 22 7 2 34 BFM 72 to BFM 75 Alarm mode setting 7 23 7 2 35 BFM 76 Alarm 1 2 3 4 dead zone 5
5. 7 7 7 2 9 BFM 12 and BFM 21 CH2 Set value SV 7 8 MITSUBISHI vi FX2N 2LC Temperature Control Block Contents 7 2 10 BFM 13 to BFM 16 CH1 and BFM 22 to BEM 25 CH2 Alarm 1 2 3 4 Set Value acc cette Dicet dee pa Min 7 8 7 2 11 BFM 17 and BFM 26 CH2 Heater disconnection alarm set value 7 8 7 2 12 18 and BFM 27 CH2 Auto manual mode changeover 7 8 7 2 13 BFM 19 and BFM 28 CH2 Manual output set value 7 9 7 2 14 BFM 20 and BFM 29 CH2 Auto tuning execution command 7 9 7 2 15 BCM 30 Unit type 7 9 7 2 16 BFM 32 CH1 and BFM 51 CH2 7 2 17 BFM 33 CH1 and BFM 52 CH2 7 2 18 BFM 34 CH1 and BFM 53 CH2 7 2 19 BFM 35 CH1 and BFM 54 CH2 7 2 20 BFM 36 CH1 and BFM 55 CH2 7 2 21 BFM 37 CH1 and BFM 56 CH2 BFM 38 CH1 and BFM 57 CH2 Operation mode 7 9 Proportional band P 7 9 Integral time 7 10 Derivative time D 7 10 Control response parameter 7 11 Output limiter upper limit Output limiter lower limit
6. Bit No Assignment Description 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 Turns on when an error has been caused by noise or when fail compensation data error ure has occurred in FX2N 2LC If contents of error are not eliminated even after power is turned b3 A D converted value error Off once then on again contact Mitsubishi Electric System Ser vice b4 Alarm 1 Turns on when an alarm has occurred b5 Alarm 2 Turns on when an alarm has occurred b6 Alarm 3 Turns on when an alarm has occurred b7 Alarm 4 Turns on when an alarm has occurred b8 Loop breaking alarm Turns on when a loop breaking alarm has occurred b9 Bund Turns when heater disconnection alarm has occurred b10 Heater meltdown alarm Turns on when a heater meltdown alarm has occurred When an error above has occurred the contents described in the corresponding Description column may be causes Eliminate causes of errors then reset all errors using BFM 10 If causes of an error remain the corresponding bit turns on again MITSUBISHI 9 1 FX2N 2LC Temperature Control Block Diagnostic 9 Other causes of errors In addition to the flags and the events the following situation may be realized 1 The FX2n 2LC does not operate with the set values written by TO instructions
7. LHO ald Wid Q 9 19 C9 PC connection cable 4 10 C9 Screw mounting hole Status indicator LED DIN rail mounting groove DIN rail width 35 mm ald Wid 91 oL C9 DIN rail mounting hook 6 6 60 8 Connector for next step extension cable 4 MITSUBISHI 2 1 FX2N 2LC Temperature Control Block Product Configuration 2 2 3 Status indication Table 2 1 LED name Indication Description Lit green 5 V power is supplied from PC main unit POWER g 10 EUREN Extinguished 5 V power is not supplied from PC main unit DAY Lit red 24 V power is supplied from outside Extinguished 24 V power is not supplied from outside Lit red OUT1 output is ON OUT1 mE Extinguished OUT1 output is OFF Lit red OUT2 output is ON OUT2 Extinguished OUT2 output is OFF MITSUBISHI 2 2 FX2N 2LC Temperature Control Block Product Configuration 2 2 4 Installation method The FX2n 2LC can be installed on the right side of an FXan 2nc Series PLC basic unit FX2n 2nc Series extension unit or another extension block The FX2n 2LC can be attached with a DIN rail DIN46277 width 35 mm or directly attached to a panel surface with screws 4 Installation on DIN rail Align the upper side of the DIN rail mounting groove of the FX2N
8. MITSUBISHI 54 FX2N 2LC Temperature Control Block Introduction of Functions 5 Overshoot prevention function Generally in PID control when a deviation continues for a long time the PID arithmetic opera tion result exceeds the effective range from 0 to 100 of the operation quantity At this time even 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 FX2n 2LC 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 opera tion result exceeds the limit point upper lower limit of the output limiter so that the PID arith metic operation result always remains inside the effective range Accordingly when a deviation becomes small the correction operation is immediately performed lt When the RFB limiter function is not provided gt lt When the RFB limiter function is provided gt The excessive quantity above the output limiter upper limit is fed back to the integral value and the arithmetic operation result is held at the upper limit value Operation Operation quantity quantity Output limiter upper limit Output limite
9. 7 2 13 7 2 14 7 2 15 7 2 16 7 2 17 BFM 19 CH1 and BFM 28 CH2 Manual output set value In BFM 19 CH1 and BFM 28 CH2 set the output ON ratio in the manual mode The display range is from 5 0 to 105 0 The output ON OFF cycle period of time can be set within the range from 1 to 100 sec using BFM 42 CH1 and BFM 61 CH2 Write the percentage of the ON period of time BFM 20 CH1 and BFM 29 CH2 Auto tuning execution command In BFM 20 perform auto tuning of CH1 In BFM 29 perform auto tuning of CH2 When BFM 20 29 is set to KO auto tuning is stopped When BFM 20 29 is set to auto tuning is performed BCM 30 Unit type code BFM 80 stores the unit type code 2060 fixed value of the FX2n 2LC BFM 32 CH1 and BFM 51 CH2 Operation mode In BFM 32 select the operation mode of CH1 In BFM 51 select the operation mode of CH2 When BFM 32 51 is set to KO only monitor is performed At this time the control output remains OFF When BFM 32 51 is set to K1 monitor and temperature alarm are performed At this time the control output remains OFF When BFM 32 51 is set to K2 initial value all of monitor temperature alarm and control are performed Monitor Monitors the measured value BFM 3 4 Temperature alarm Monitors the event input error 00 and 1 of 1 and 2 and alarms 1 to 4 b4 to b7 of BFM 1 and BFM 2 Control Perfor
10. indicates the I O No assignment in the PC main unit Up to eight FX2n 2LC units can be connected to the FX2n Series PC Up to four FX2n 2LC units can be connected to the FX2Nc Series PC When connecting the FX2n 2LC unit to the FX2nc Series the interface FX2nc CNV IF is required When connecting the FX2N 2LC unit to the FX2n Series the interface FX2Nc CNV IF is not required For extension an extension cable FXoN 65EC 650 mm and the FX2nc CNV BC sold sepa rately are required Only one FXon 65EC can be used per system 4 MITSUBISHI 24 FX2N 2LC Temperature Control Block Specifications 3 1 Introduction 2 Product Configuration 3 Specifications 4 Wiring 5 Introduction of Functions 6 Alarm 7 Buffer Memory BEM 8 Program Example 9 Diagnostic MITSUBISHI FX2N 2LC Temperature Control Block Specifications 3 MITSUBISHI FX2N 2LC Temperature Control Block Specifications 3 3 Specifications 3 1 Environmental specifications Table 3 1 Specifications Withstand voltage ah for 1 minute between analog input terminal and grounding ter Other environmental specifications are equivalent to those for the PC main unit Refer to the 3 manual of the PC main unit 3 2 Power supply specifications Table 3 2 ltem Specifications 24 VDC 15 to 10 inpu
11. Securely connect cables such as extension cables and memory cassettes to specified connectors Imperfect contact may cause malfunction 4 MITSUBISHI 2 3 FX2N 2LC Temperature Control Block Product Configuration 2 2 5 Connection to PC Main Unit Connect the FX2n 2LC to the PC main unit with an extension cable FX2n 2LC units are treated as special blocks of the PLC and the special block No 0 to 7 is automatically assigned to each FX2n 2LC unit from the one nearest to the PLC basic unit These unit Nos are used in FROM TO instructions One FX2n 2LC unit occupies eight I O points the PC main unit For the details of I O assignment in the PC refer to the manual of the 2 2 Series PC FX2N 32MR FX2N 2LC FX2N 32MR X000 to X017 FX2N 4AD X020 to X037 FX2N 2LC ge eei e S 9 PU 4 g 89999999 POWER POWER 99999999 MITSUBISHI m 99992229 rower e row mw ow FXa 32MR 2838289 F 655232999 32834111 a T VUE UT qam 2 ae ES arre AEC BR 8915 5 99 59 5188 TIERE ART 1 zu om om o 000 to YO17 Special Special Y020 to Y037 Special block block block No 0 No 1 No 2
12. Measured value p d Alarm set value gt Temperature p set value SV Input sampling m 3 times Pp 5 times Alarm status Non alarm status Alarm status 7 2 37 BFM 78 Number of times of heater disconnection alarm delay In BFM 78 set the number of heater disconnection alarm delays This setting is applied to both CH1 and CH2 If the abnormal status consecutively occurs in the heater current measured value sampling cycle 1 sec by the preset number of times an alarm is issued The allowable set range is from 3 to 255 times MITSUBISHI 7 26 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 38 BFM 79 Temperature rise completion range setting In BFM 79 set the temperature rise completion range This setting is applied to both CH1 and CH2 Set the temperature range in which the temperature rise completion range is judged based on the temperature set value The actual temperature rise completion range is judged within the range above and below the temperature set value so the range width is twice Set value SV gt Temperature rise completion range _ Temperature rise completion 7 2 39 BFM 80 Temperature rise completion soak time In BFM 80 set the temperature rise completion soak time This setting is applied to both CH1 and CH2 The temperature rise completion soak time i
13. nina 5 1 5 1 1 Easy PID control with two degrees of 5 1 5 1 2 Overshoot prevention function nnne 5 2 9 2 TNOSDOSIUOFPLOGOTHEO reset Leda 5 3 5 9 Auto tuning fUhcllonzs eee EE Ie e Ra ntu erm ID MR IEEE 5 4 584 AT auto tuning een nn 5 4 5 3 2 AT DIAS re E 5 5 5 4 Auto manual uu uu tre a eerta er aee oben one ken dass 5 6 5 4 1 Auto mode and manual mode 5 6 5 4 2 Balance less bump less 5 7 5 5 Heater disconnection detection 5 8 5 6 Loop breaking alarm function LBA 5 9 E e AE PE AO u UR 6 1 7 Buffer Memory BEM a an 7 1 yu EE Viu uA ee ee 7 1 7 2 Details of buffer memories ener 7 4 rene ineat 7 4 7 2 2 BFM 1 and BFM 2 CH2 Event 7 5 7 2 3 BFM 3 and BFM 4 CH2 Measured value PV 7 7 7 2 4 BFM 5 and BFM 6 CH2 Control output value MV 7 7 7 2 5 BFM 7 and BFM 8 CH2 Heater current measured value 7 7 7 2 6 BFM 9 Default setting command 7 7 7 2 7 BFM 10 Error reset 7 7 7 2 8 BFM 11 Control start stop
14. 300 0 to 300 0 F 300 to 900 F 300 to 1100 F When B is used 0 to 399 C 0 to 799 F is outside the precision compensation range When PLII is used 0 to 32 F is outside the precision compensation range When WRe5 to WRe26 are used 0 to 32 F is outside the precision compensation range MITSUBISHI 3 4 FX2N 2LC Temperature Control Block Specifications 3 3 6 Output specifications Table 3 6 Item Description Number of output points 2 points Output method NPN open collector transistor output Rated load voltage 5 to 24 VDC Maximum load voltage 30 VDC or less Maximum load current 100 mA Leak current in OFF status 0 1 mA or less Maximum voltage drop in ON status 2 5 maximum 1 0 typical at 100 mA Control output cycle 30 seconds Variable within range from 1 to 100 seconds MITSUBISHI 3 5 FX2N 2LC Temperature Control Block Specifications 3 MITSUBISHI 3 6 FX2N 2LC Temperature Control Block Wiring 4 1 Introduction 2 Product Configuration 3 Specifications 4 Wiring 5 Introduction of Functions x 6 Alarm 7 Buffer Memory 8 Program Example 9 Diagnostic MITSUBISHI FX2N 2LC Temperature Control Block Wiring 4 MITSUBISHI FX2N 2LC Temperature Control Block Wiring 4 4 Wiring
15. Cautions on Wiring Make sure to shut down the power supplies of all phases on the outside before starting installation or wiring If the power supplies are not shut down you may get electrical shock or the unit may be damaged As to loads which are dangerous when turning on at the same time make sure to inter lock them outside the PLC and the FX2n 2LC in addition to interlocking of them in a pro gram in the PLC Correctly connect the power cable of the FX2n 2LC and the PLC as described in this manual If the AC power supply is connected to a DC I O terminal DC power terminal the PLC may be burnt Never perform external wiring to unused terminals Le in the FX2n 2LC and the PLC Such wiring may damage the units Perform Class 3 grounding with an electric wire of 2 mm or more to the grounding termi nal in the FX2n 2LC and the PLC However never perform common grounding with a strong power system 4 MITSUBISHI 4 1 FX2N 2LC Temperature Control Block Wiring 4 4 1 Wiring When a temperature sensor is a thermocouple TC AC power supply DC24V FX2N 2LC s 24 24 e OUT1 n COM OUT2 CT CT SSR CT PTA FG S Shielded cable PTB TC CT CT oT AM 7 Heater FG Shielded cable
16. Check whether or not the FX2n 2LC is correctly connected to the PLC Check the connector positions and the connection status Check whether or not the unit No and the BFM Nos are correctly specified in FROM TO instructions 2 The POWER LED is not lit Check whether or not the FX2n 2LC is correctly connected to the PLC Check the connector positions and the connection status Check whether or not the used capacity of the service power supply of the PLC main unit exceeds the allowable range MITSUBISHI 9 2 Under circumstances will Mitsubishi Electric liable or responsible for any consequential damage that may arise as a result of the installation use and or programming of the products associated with this manual All examples and diagrams shown in this manual are intended as an aid to understanding the text not to guarantee operation Mitsubishi Electric will accept no responsibility for actual use of the product based on these illustrative examples Owing to the very great variety of possible applications users must satisfy themselves as to the suitability of each specific application USER S MANUAL FX2n 2LC Temperature Control Block 4 MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE MITSUBISHI DENKI BLDG MARUNOUCHI TOKYO 100 8310 TELEX J24532 CABLE MELCO TOKYO HIMEJI WORKS 840 CHIYODA CHO HIMEJI JAPAN Effective Jan 2000 JY992D85801A Specification are subject 001 to chan
17. Molten relay inside instrument etc 2 Abnormality in input circuit No change in the measured value PV even after input has changed 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 MITSUBISHI 7 20 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 32 In BFM 50 set the loop breaking alarm dead zone of CH1 In BFM 69 set the loop breaking alarm dead zone of CH2 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 func tion is disabled non alarm status region can be set For example 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 While the measured value PV is located within the non alarm region alarm is not issued even if the alarm condition is satisfied The allowable set range is form 0 0 or 0 to the input range span C or F When BFM 50 69 is set to 0 the loop breaking alarm dead zone function is disabled LBD operation gap Non alarm status region J LBD
18. The AT auto tuning function automatically measures calculates and sets optimal PID con stants in accordance with the set temperature When the AT execution command CH1 BFM 20 CH2 BFM 29 is set to 1 auto tuning is performed Auto tuning can start from an arbitrary status at any time immediately after the power is turned on while the temperature is rising or while control is stable When auto tuning starts two position control is performed using the set value SV By two position control the output is forcedly hunted and its amplitude and oscillation cycle are mea sured PID constants are calculated based on the measured values and stored in each parameter When auto tuning normally finishes control continues with new calculated PID constants While auto tuning is performed b14 of the event CH1 BFM 1 CH2 BFM 2 is set to 1 For auto tuning the AT bias can be set In order to calculate proper PID constants by auto tuning set the upper limit of the output lim iter to 100 the lower limit of the output limiter to 0 and the output change ratio limiter func tion to OFF 1 Auto tuning can be performed when the following conditions are satisfied The control start stop status shall be set to control start The operation mode shall be set to the control mode 2 The auto manual mode shall be set to auto The input value PV shall be normal The upper limit and the lower limit of the output limiter sh
19. an alarm Lower limit deviation value Input 13 is issued However when power is turned on and alarm with re wait width when set value is changed measured value is ignored When absolute deviation Measured value PV ei T Set value SV is more than alarm set value an Upper lower limit deviation es Input 14 I alarm is issued However when power is turned value alarm with re wait width on and when set value is changed measured value is ignored Input range Numeric value from the lower limit to the upper limit of input value Input width Width from the lower limit to the upper limit of input value Input width Upper limit value Lower limit value Input width Both a positive and negative numeric values can be set Input width Only a positive numeric value can be set MITSUBISHI 7 24 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 35 BFM 76 Alarm 1 2 3 4 dead zone setting In BFM 76 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 The allowable set range is the input range from 0 0 to 10 0 Upper limit input value alarm a
20. PIE TC Thermocouple PTB TC P When a temperature sensor is a resistance thermometer bulb RTD Resistance FX2N 2LC thermometer Shielded cable bulb Fe PIBITO 1 am 1 Connect the terminal the FX2n 2LC to the terminal in the PLC to which Class 3 grounding is performed When using a thermocouple use specified compensating lead wires When using a resistance thermometer bulb use the three wire type and perform wiring with lead wires having small resistance and no difference in the resistance among the three wires Terminal tightening torque 0 5 to 0 8 N m 4 MITSUBISHI 4 2 FX2N 2LC Temperature Control Block Introduction of Functions 5 1 Introduction x 2 Product Configuration x 3 Specifications x 4 Wiring x 5 Introduction of Functions x 5 6 Alarm x 7 Buffer Memory x 8 Program Example x 9 Diagnostic x MITSUBISHI FX2N 2LC Temperature Control Block Introduction of Functions 5 MITSUBISHI FX2N 2LC Temperature Control Block Introduction of Functions 5 5 Introduction of Functions This section introduces the functions of the FX2n 2LC For setting of each function refer to the description on buffer memories BFM later 5 1 PID
21. actual input value is added corrected by the sensor correction value then stored as the measured value BFM 3 BFM 4 Use this correction value to correct the dispersion among sensors and the difference in the measured value PV from those by other instruments The allowable set range is 50 00 Example Condition To correct 2 C in the range span of 400 C At this time the sensor correction value is as follows Sensor correction value 2 C 400 x 100 0 5 The display value is as follows Display value Measured value PV Sensor correction value Measured value PV Correction value 2 C Display Temperature vale set value SV Actual measured value Time 4 MITSUBISHI 7 14 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 24 7 2 25 BFM 41 CH1 and BFM 60 CH2 Adjustment sensitivity dead zone setting In BFM 41 set the adjustment sensitivity dead zone of CH1 In BFM 60 set the adjust ment sensitivity dead zone of CH2 By setting the adjustment sensitivity repetitious turning on off of the output around the temper ature set value SV can be prevented while two position control is performed The value set to BFM 41 60 is equally given to the upper portion and the lower portion of the temperature set value BFM 12 21 For example if the adjustment sensitivity value is set to 10 5 above the temperature set value and 5 below the temperature
22. control 5 1 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 proportional band 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 FX2N 2LC 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 Setting of PID constants and selection of the response to setting can be performed using buffer memories 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 Response to disturbance Set value Set value SV P x SV LER When PID constants are so set that the response to disturbance becomes good Response to changes in set value Response to disturbance Set value Set value SV SV Easy PID control with two degrees of freedom Response to changes in set value Response to disturbance n Medium Set value Set value SV SV
23. in the control loop The allowable set range is from 0 to 7 200 sec When BFM 49 68 is set to 0 the loop breaking alarm function is disabled Abnormality judgment criteria Table 7 5 Heating control reverse operation When output is less than 0 or output limiter lower limit When measured value PV does not decrease at least by loop breaking change criteria 2 C within loop breaking set time an alarm is issued When output is more than 100 or output limiter upper limit When measured value PV does not increase at least by loop breaking change criteria 2 C within loop breaking set time an alarm is issued Table 7 6 Cooling control normal operation When output is less than 0 or output limiter lower limit When measured value PV does not decrease at least by loop breaking change criteria 2 C within loop breaking set time an alarm is issued When output is more than 100 or output limiter upper limit When measured value PV does not increase at least by loop breaking change criteria 2 C within loop breaking set time an alarm is issued Abnormality targets 1 Abnormality in control target Heater disconnection lack of power supply wiring mistake etc 2 3 4 5 Abnormality in sensor Sensor disconnection short circuit etc Abnormality in operating machine Molten relay wiring mistake etc Abnormality in output circuit
24. operation for PID control and output control You do not have to create sequence programs for PID operation 3 Disconnection of heaters can be detected by current detection CT 4 The proportional band the integral time and the derivative time can be easily set by auto tuning 5 Channels are isolated against each other 4 MITSUBISHI 1 2 FX2N 2LC Temperature Control Block Product Configuration 2 1 Introduction x 2 Product Configuration x 3 Specifications x 4 Wiring x 5 Introduction of Functions x 6 Alarm x 7 Buffer Memory x 8 Program Example x 9 Diagnostic x MITSUBISHI FX2N 2LC Temperature Control Block Product Configuration 2 MITSUBISHI FX2N 2LC Temperature Control Block Product Configuration 2 2 Product Configuration 2 1 Outside dimension Connector for next step 4 extension cable Extension T V RA cable 5 w DIN rail z width ll o 35 mm o P mounting N groove E Mounting Keygen s QUO 2 22 hole 2 045 87 DIN rail Status indicator LED Unit mm Mass kg Outer color Munsell 0 08GY 7 64 0 81 2 2 Name of each part Terminal block e G9 WOO ZLNOLLNG vz amp FXan 2LC 19 C9 04 19 C9
25. that obtained by the proportional operation is called the derivative time As the derivative time is longer the derivative effect is larger The allowable set range is from 0 to 3 600 sec When BFM 35 54 is set to 0 the derivative function is disabled MITSUBISHI 7 10 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 20 BFM 36 and BFM 55 CH2 Control response parameter In BFM 436 set the control response parameter of CH1 In BFM 55 set the control response parameter of CH2 The control response parameter selects the response to changes in the temperature set value SV in PID control among three steps slow medium and fast When BFM 36 55 is set to the response becomes slow speed When BFM 36 55 is set to the response becomes medium speed When BFM 36 55 is set to K2 the response becomes fast speed The figure below shows the operation at each setting Measured value PV Medium Temperature set value SV 2 Changed Temperature set y value SV 1 Temperature set value SV change point In order to increase the response speed of the control target to changes in the temperature set value SV select fast In this case however a little overshoot cannot be avoided Overshoot is not desirable in some control targets In order to prevent overshoot select slow MITSUBISHI 7 11 FX2N 2LC Temperature Control Block Buff
26. to 1600 F 12 0 to 3200 F 36 50 0 to 150 0 107 C 13 0 to 1700 C 37 200 0 to 500 0 101 C 14 0 to 3200 F 38 300 0 300 0 10 1 15 200 0 to 200 0 10 1 39 300 900 F 16 E 0 to 1000 C 40 50 0 to 150 0 10 1 17 to 1800 F 41 200 0 600 0 10 1 18 200 0 200 0 10 1 42 da 300 0 to 300 0 10 1 F 19 200 0 to 400 0 10 1 43 300 1100 F 20 0 0 to 400 0 107 C 21 1 300 0 to 400 0 10 1 F 22 300 0 to 700 0 10 1 F 23 0 0 to 700 0 10 1 2 For B inputs 0 to 399 C 0 to 799 F is outside the precision compensation range 3 For PLII inputs 0 to 32 F is outside the precision compensation range 4 For WRed to WRe26 inputs 0 to 32 F is outside the precision compensation range MITSUBISHI 7 22 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 34 72 to BFM 75 Alarm mode setting The FX2N 2LC is equipped with 14 types of alarms Among them up to 4 types can be used in accordance with the application Write the alarm No used in Alarm 1 to BFM 72 Write the alarm No used in Alarm 2 to BFM 73 Write the alarm No used in Alarm 3 to BFM 74 Write the alarm No used in Alarm 4 to BFM 75 The alarm modes set here are applied to both channels However the set value of each alarm can be set for each channel and the alarm result can be obtained for each channel also CH1 set val
27. value The control output cycle output limiter output change ratio limiter loop breaking alarm judge ment time alarm dead zone heater disconnection alarm sensor correction value adjustment sensitivity dead zone primary delay digital filter setting change ratio limiter auto tuning bias setting limiter and the temperature rise completion soak time are not set The initial values are used Device assignment Inputs X000 Performs initialization when the power is turned on from off X001 Resets errors when the power is turned on from off X002 Control start ON stop OFF X003 Performs auto tuning when the power is turned on from off X004 Performs auto tuning when the power is turned on from off CH2 X005 Writes the EEPROM when the power is turned on from off Auxiliary relays MO to M15 Flags M20 to M35 Events CH1 M40 to M55 Events CH2 MITSUBISHI 8 2 FX2N 2LC Temperature Control Block Program Example 8 Data registers DO D2 D3 D4 D5 D6 D7 D8 D1 Set values Not used Temperature measured value PV of CH1 Temperature measured value PV of CH2 Control output value MV of CH1 Control output value MV of CH2 Heater current measured value of CH1 Heater current measured value of CH2 D82 Set value range error address MITSUBISHI 8 3 FX2N 2LC Temperature Control Block Program Example 8 PLC program
28. 1 When the set value backup command turns on the FX2n 2LC turns on the set value backup flag 2 When backup of the set values is completed the set value backup flag turns off When this flag turns off turn off the set value backup command 3 If the set value backup command turns off while the set values are being backed up the set 7 value backup error turns on In such a case normally back up the set values again If the power is turned off and on while a backup error is present each data is reset to the ini tial value 4 While a set value range error BFM 0 b1 is present the set values are not backed up MITSUBISHI 7 29 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 4 MITSUBISHI 7 30 FX2N 2LC Temperature Control Block Program Example 8 1 Introduction 2 Product Configuration 3 Specifications 4 Wiring 5 Introduction of Functions x 6 Alarm 7 Buffer Memory 8 Program Example 9 Diagnostic MITSUBISHI FX2N 2LC Temperature Control Block Program Example 8 MITSUBISHI FX2N 2LC Temperature Control Block Program Example 8 8 Program Example N Cautions on Startup Never touch any terminal while the power is supplied If you touch a terminal while the power is supplied you may get electrical shock or the unit may malfunction Turn off the power before cleaning the unit or tighte
29. 10 K 1 K 1 Performs error reset X002 H TO KO K 11 KO K 1 Stops control X002 TOT KO K 11 K 1 K 1 Starts control M15 TOI KO K 18 KO K 1 Temperat ure control ready flag TO KO K 27 KO K 1 M34 TOT KO K 20 KO K 1 Auto tuning is being performed CH1 M54 TON KO K 29 KO K 1 Auto tuning is being performed CH2 X003 8 KO K 20 K 1 K 1 Performs auto tuning CH1 X004 tf TOM KO K 29 K 1 K 1 Performs auto tuning 2 END Initializes all data When X000 is set to ON all data is initialized When initialization is not necessary this line can be omitted Error reset command When X001 is set to ON all errors indicated by the flag BFM 0 are reset Starts stops control When X002 turns off control stops When X002 turns on control starts In order to turn off the control 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 basic unit In this example only the auto mode is used When changeover of the mode is necessary write K1 to BFM 18 and BFM 27 in accordance with the changeover condition Performs auto tuning When X003 X004 is set to ON auto tuning is performed Once auto tuning has started it continues even if X003 X004 is set to OFF after that When the flag M24 M44 turns off while auto tuning is performed it is judged that auto tuning is completed Then KO is written to BFM 20 29
30. 2LC with a DIN rail DIN46277 width 35 mm and push the FX2N 2LC on the DIN rail 9 When removing the FX2n 2LC pull out downward the DIN rail mounting hook 9 then remove the FX2N 2LC When attaching to DIN rail When removing from DIN rail os Je Direct installation on panel surface Screw tighten the FX2n 2LC with screws to a panel surface using two upper and lower mounting holes provided on the left side of the FX2n 2LC Assure the interval of 1 to 2 mm between a unit or block installed on the left side of the FX2n 2LC Cautions on installation Use the unit in the environment for the general specifications described in the manual Never use the unit in a place with dusts soot conductive dusts corrosive gas or flamma ble gas place exposed to high temperature dew condensation or rain and wind or place exposed to vibration or impact If the unit is used in such a place electrical shock fire malfunction damages in the unit or deterioration of the unit may be caused Never drop cutting chips or electric wire chips into the ventilation window of the FX2N 2LC while drilling screw holes or wiring cables Such chips may cause fire failure or malfunction After finishing installation remove a dust preventing sheet adhered on the ventilation window of the PC and the FX2N 2LC If the sheet remains attached fire failure or malfunction may be caused
31. 8 Applicable current range 0 0 to 100 0 A CTL 6 P H Applicable current range 0 0 to 30 0 A Manufacturer U R D Co Ltd s MITSUBISHI 5 8 FX2N 2LC Temperature Control Block Introduction of Functions 5 5 6 Loop breaking alarm function LBA 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 CH1 BFM 1 b8 CH2 BFM 2 b8 when judging that there is an abnor mality in the control loop Abnormality judgment criteria Table 5 1 Heating control reverse operation When measured value PV does not decrease at least by loop breaking change criteria 2 within loop breaking set time an alarm is issued When output is less than 0 or output limiter lower limit When output is more than 100 When measured value PV does not increase at least by loop break or output limiter upper limit oa criteria 2 C within loop breaking set time an alarm is Table 5 2 Cooling control normal operation 5 When measured value PV does not decrease at leas by loop break When output is less than 0 or I an n ing change criteria 2 C within loop breaking set time an alarm is output limiter lower limit i susd When outputis more tha
32. ADVANCED AND EVER gt PYANCINGMATTSUBISHI ELECTRIC 4 MITSUBISHI 7 PROGRAMMABLE CONTROLLERS m FX2N 2LC Temperature Control Block Foreword This manual contains text diagrams and explanations which will guide the reader in the cor rect installation and operation of the communication facilities of FX series Before attempting to install or use the communication facilities of FX series this manual should be read and understood If in doubt at any stage of the installation of the communication facilities of FX series always consult a professional electrical engineer who is qualified and trained to the local and national standards which apply to the installation site If in doubt about the operation or use of the communication facilities of FX series please consult the nearest Mitsubisi Electric distributor This manual is subject to change without notice s MITSUBISHI FX2N 2LC Tempereture Control Block FX2n 2LC Temperature Control Block USER S MANUAL Manual number JY992D8580 1 Manual revision Date January 2000 MITSUBISHI FX2N 2LC Tempereture Control Block MITSUBISHI FX2N 2LC Tempereture Control Block FAX BACK Mitsubishi has a world wide reputation for its efforts in continually developing and pushing back the frontiers of industrial automation What is sometimes overlooked by the user is the care and attention to detail that is taken with the d
33. By this writing auto tuning can be performed again If auto tuning does not have to be performed again upper two lines can be omitted M34 and M54 turn on and off in accordance with the event status Ina practical program if the setting has been determined by initialization or backup to the EEPROM it is not required to write such setting again MITSUBISHI 8 6 FX2N 2LC Temperature Control Block Program Example 8 n this example the status of the flags BFM 0 and the events BFM 1 and BFM 2 can be monitored using auxiliary relays M In order to output such status to the outside use each auxiliary relay as a contact and drive outputs Y MO cyo Error present is output An error is present M28 Y1 CH1 loop disconnection alarm is output CH1 loop is disconnected M48 Y2 CH2 loop disconnection alarm is output CH2 loop is disconnected MITSUBISHI 87 FX2N 2LC Temperature Control Block Program Example 8 MITSUBISHI 8 8 FX2N 2LC Temperature Control Block Troubleshooting 9 1 Introduction 2 Product Configuration 3 Specifications 4 Wiring 5 Introduction of Functions 6 Alarm 7 Buffer Memory BEM 8 Program Example 9 Diagnostic MITSUBISHI FX2N 2LC Temperature Control Block Troubleshooting 9 MITSUBISHI FX2N 2LC Temperature Control Bl
34. FM 5 stores the control output value output ON ratio of CH1 BFM 6 stores the control output value output ON ratio of CH2 The display range is from 5 0 to 105 0926 BFM 7 CH1 and BFM 8 CH2 Heater current measured value BFM 7 stores the heater current measured value of CH1 input from CT BFM 8 stores the heater current measured value of CH2 input from CT The display range is from 0 0 to 4105 0 A BFM 9 Default setting command In BFM 9 initialize the set values When BFM 9 is set to KO initial value the default setting command is disabled When BFM 9 is set to addresses 10 to 81 are set to the initial values When BFM 9 is set to K2 addresses 10 to 69 are set to the initial values However the initial value of the setting limiter upper lower limit is the input range upper lower limit It takes 500 ms maximum to perform initialization While initialization is being performed FROM TO instructions are not accepted BFM 10 Error reset command In BFM 10 reset errors When BFM 10 is set to all errors occurred in BFM 0 are reset If the causes of an error are not eliminated the corresponding error bit turns on again BFM 11 Control start stop changeover When BFM 11 is set to KO initial value control stops When BFM 11 is set to K1 control starts When the PLC basic unit is changed over from RUN to STOP outputs of the FX2n 2LC are held In order to stop outputs o
35. N 2LC Tempereture Control Block Guidelines for the Safety of the User and Protection of the Temperature control block FX2n 2LC This manual provides information for the use of the Temperature control block FX2n 2LC The manual has been written to be used by trained and competent personnel The definition of such a person or persons is as follows a 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 regards to auto mated equipment b Any commissioning or service engineer must be of a competent nature trained and qual ified to the local and national standards required to fulfill that job These engineers should also be trained in the use and maintenance of the completed product This includes being completely familiar with all associated documentation for the said 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 manner in compliance to established safety practices The operators should also be familiar with documentation which is connected with the actual operation of the completed equipment Note No
36. Only read is enabled R W Both read and write are enabled w Setting data can be backed up by EEPROM in accordance with the setting of BFM 83 d Write is enabled when the manual mode transition completion flag is ON As to a numeric value containing a decimal point and numbers after that set it as a value multiplied by 10 Example 100 0 actual value 1000 set value If a value is written by mistake to a buffer memory used only for read the written value is ignored And 500 ms later the buffer memory is overwritten with a correct value If a 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 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 4 MITSUBISHI 73 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 Details of buffer memories 7 2 1 BFM 0 Flag Table 7 2 Bit No Description Operation Turns on when an error among b1 to b10 below has Error present occurred b1 Set value range error Turns on when data outside set range is written b2 24 VDC power supply error on when driving power supply 24 VDC is not sup Turns on when an error has been caused by noise or when a failure has occurred in FX2N 2LC b3 Set value backup err
37. all not be set to a same value The proportional band shall not be set to 0 two position operation 4 MITSUBISHI 54 FX2N 2LC Temperature Control Block Introduction of Functions 5 2 When either of the following conditions are given during auto tuning the operation is aborted When the input value PV becomes abnormal caused by disconnection etc When the set value SV is changed When control is stopped when the operation mode is changed or when the auto manual mode is set to manual When the AT bias setting is changed When the PV bias setting is changed When the digital filter setting is changed When the output limiter setting is changed When the power is interrupted When the AT execution command CH1 BFM 20 CH2 BFM 29 is set to 0 AT stop Measured value PV Example When AT is performed while the temperature is rising Temperature set value SV AT starts AT finishes 5 3 2 AT bias Set the AT bias to perform auto tuning in which the measured value PV should not exceed the temperature set value SV The auto tuning function performs two position control using the temperature set value SV hunts the measured value PV then calculates and sets each PID constant However for some control targets overshoot caused by hunting is not desirable Set the AT bias for such a case When the AT bias is set the set value SV AT point with which auto tuning is p
38. ates even if an abnormality occurs in the external power supply or a failure occurs in the PLC or the FX2n 2LC If a safety circuit is installed inside the PLC malfunction and erroneous output may cause accidents 1 Make sure to construct an emergency stop circuit protection circuit or interlock circuit to prevent damages of a machine etc outside the PLC or the FX2n 2LC 2 If the PLC or the FX2n 2LC detects an abnormality such as a watch dog timer error or input value error by the self diagnosis function or when an abnormality occurs in the I O control area etc which cannot be detected by the CPU in the PLC output control may be disabled Design external circuits and structure so that the entire system conservatively operates in such cases 3 If a failure occurs in a relay transistor TRIAC etc in an output unit of the FX2n 2LC or the PLC outputs may keep ON or OFF For output signals which may lead to severe accidents design external circuits and struc ture so that the entire system conservatively operates Cautions on installation A Use the unit in the environment for the general specifications described in the manual Never use the unit in a place with dusts soot conductive dusts corrosive gas or flamma ble gas place exposed to high temperature dew condensation or rain and wind or place exposed to vibration or impact If the unit is used in such a place electrical shock fire malfunction damages in the unit or d
39. e alternately displayed When BFM 81 is set to K1 only the ON current is displayed Even in the OFF time the ON current remains displayed When control is stopped the OFF current is displayed without regard to the setting of BFM 81 BFM 82 Set value range error address When an out of range error occurs in the set value written to each BFM BFM 82 indicates the BFM No in which the error occurs While no error occurs BFM 82 stores 0 When an error occurs BFM 82 stores the BFM No in which the error occurs Check the set range set a proper value for the corresponding BFM then reset the error BFM 10 MITSUBISHI 7 28 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 42 BFM 83 Set value backup command 483 writes the values set to BFM 12 to BFM 29 and BFM 32 to BFM 81 to the EEPROM built in the FX2n 2LC When the power is turned on the FX2n 2LC transfers the data stored in the EEPROM to the buffer memories and use the data as the set values for temperature control When the set val ues are backed up written to the EEPROM once BFM 12 to BFM 29 and BFM 32 to BFM 81 do not have to be set at the next time and later As a result as soon as control starts BFM 11 temperature control is enabled At the time of shipment the EEPROM stores the initial values Set value backup command Set values are being backed up Set value backup error Description on operation
40. e b13 of the event CH1 BFM 1 CH2 BFM 2 is 1 that is when the manual mode is selected Even in the manual mode the temperature alarm function is effective MITSUBISHI 5 6 FX2N 2LC Temperature Control Block Introduction of Functions 5 5 4 2 Balance less bump less function The balance less bump less function prevents overload caused by drastic change in the con trol output value MV when the mode is changed over from auto to manual or from manual to auto Operation performed when the mode is changed over from auto to manual The control output value in the auto mode continues to be effective Operation performed when the mode is changed over from manual to auto The control output value is changed over to a value automatically calculated based on the temperature set value SV Operation output quantity Time The mode is changed over from auto to manual However the operation output quantity follows the operation output quantity in the auto mode The operation output quantity is manually changed 9 The mode is changed over from manual to auto The operation output quantity becomes a value automatically calculated based on the temperature set value SV MITSUBISHI 57 FX2N 2LC Temperature Control Block Introduction of Functions 5 5 5 Heater disconnection detection function The heater disconnection detection function detects the current flowing in the load using a
41. e from set value SV 10 C to set value SV 10 C Measured value PV Measured value PV Alarm set value Temperature set value SV gt Deviation Deviation Alarm set value gt Time Non alarm status Alarm status Alarm status MITSUBISHI 64 FX2N 2LC Temperature Control Block Alarm 6 Alarm wait operation The wait operation ignores the alarm status of the measured value PV occurred when the power is turned on and disables the alarm function until the measured value PV goes out of the alarm status once When control starts the wait operation is performed also lt When the wait operation is performed gt lt When the wait operation is not performed gt Measured value PV Vel Measured value Measured value PV Measured value PV ye PV Temperature Temperature set value SV P rete set value Sv gt Devia tion Alarm set tion value Alarm set value gt gt Alarm status Wait operation region Non alarm status Alarm status Alarm re wait operation The alarm re wait operation ignores the alarm status of the measured value PV occurred when the power is turned on and disables the alarm function until the measured value PV goes out of the alarm status once When the temperature set value SV is changed the mea
42. emperature Control Block Alarm 6 1 Introduction x 2 Product Configuration x 3 Specifications x 4 Wiring x 5 Introduction of Functions x 6 Alarm x 7 Buffer Memory BFM x 8 Program Example x 9 Diagnostic x MITSUBISHI FX2N 2LC Temperature Control Block Alarm 6 MITSUBISHI FX2N 2LC Temperature Control Block Alarm 6 6 Alarm The FX2N 2LC is equipped with 14 types of alarms Among them up to 4 types can be used in accordance with the application The alarm types to be used can be selected using buffer memories The result of each alarm is written to BFM 1 and BFM 2 and can be read in the PLC main unit When the measured value PV is near the alarm set value of an used alarm type the alarm status and the non alarm status may be repeated by fluctuation in inputs In order to cope with such a case the alarm dead zone can be set to prevent repeating of the alarm status and the non alarm status The dead zone of alarms 1 to 4 can be set using BFM 76 Table 6 1 Alarm EE Set No Alarm type Description range 0 Alarm function OFF Alarm function is disabled Eos RE When measured value PV is more than alarm set Input 1 Upper limit input value alarm rae value an alarm is issued range SHE When measured value PV is less than alarm set Input 2 Lower limit input value alarm NO value an alar
43. er formed can be changed Measured value PV Example When the AT bias is set to Temperature set value SV AT bias AT point AT starts AT finishes MITSUBISHI 5 5 FX2N 2LC Temperature Control Block Introduction of Functions 5 5 4 5 4 1 Auto manual Auto mode and manual mode The mode can be changed over between auto and manual In the auto mode the control output value MV is set to the output quantity automatically calculated in accordance with the temperature set value SV In the manual mode the control output value MV is set to the output quantity set arbitrarily and manually In the manual mode b13 manual mode transition completion of the event CH1 BFM 1 CH2 BFM 2 becomes 1 to notify the manual mode 0 5 second is required to change over the mode During changeover the balance less bump less function is actuated Auto mode In the auto mode the measured value PV is compared with the temperature set value SV and the control output MV is given by PID arithmetic operation This mode is selected when the FX2n 2LC is shipped In the auto mode the manual output value is always set to the output value MV Manual mode In the manual mode the output MV value is fixed to a certain value By changing the manual output setting BFM 19 BFM 28 the output value can be fixed to an arbitrary value The manual output value can be changed whil
44. er Memory BFM 7 7 2 24 37 and BFM 56 CH2 Output limiter upper limit BFM 38 CH1 and BFM 57 CH2 Output limiter lower limit In BFM 37 and BFM 56 set the output limiter upper limit of CH1 and CH2 respectively In BFM 38 and BFM 57 set the output limiter lower limit of CH1 and CH2 respectively Use these BFMs when setting the upper limit and the lower limit for the setting of the control output value MV BFM 5 BFM 6 The allowable set range of the upper limit is from the output limiter lower limit to 105 The allowable set range of the lower limit is from 5 0 to the output limiter upper limit Output limiter upper limit m Output limiter lower limit p While the output limiter is effective proper PID constants may not be obtained during auto tuning It is recommended not to use the output limiter when auto tuning is used While two position control is used the output limiter is not effective MITSUBISHI 7 12 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 22 BFM 39 CH1 and BFM 58 CH2 Output change ratio limiter In BFM 439 set the output change ratio limiter of CH1 In BFM 58 set the output change ratio limiter of CH2 The output change ratio limiter function limits the variation of the control output value MV per unit time 1 sec The output is limited in accordance with the preset output change ratio The allowable set ran
45. erature is entered that is outside the input range the set range error flag BFM 0 b1 turns on If an input range value upper lower is entered that is not allowable the set range error flag BFM 0 b1 turns on The same flag is used for both types of errors When changing the input range values make sure that the upper and lower limit values are inside the allowable input range The allowable set range for the lower limit is the higher of two values the default value 100 C or the lower limit for the sensor used values shown on page 7 22 The allowable set range for the upper limit is the lower of two values the default setting of 1300 C or the upper limit for the sensor used values shown on page 7 22 The initial value is the default input range 100 to 1 300 C MITSUBISHI 719 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 31 BFM 49 CH1 and BFM 68 CH2 Loop breaking alarm judgement time In BFM 49 set the loop breaking alarm judgement time of CH1 In BFM 68 set the loop breaking alarm judgement time of CH2 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 CH1 BFM 1 b8 CH2 BFM 2 b8 when judging that there is an abnor mality
46. eterioration of the unit may be caused Never drop cutting chips or electric wire chips into the ventilation window of the FX2N 2LC while drilling screw holes or wiring cables Such chips may cause fire failure or malfunction After finishing installation remove a dust preventing sheet adhered on the ventilation window of the PC and the FX2n 2LC If the sheet remains attached fire failure or malfunction may be caused Securely connect cables such as extension cables and memory cassettes to specified connectors Imperfect contact may cause malfunction Caution on disposal IN When disposing of the unit treat it as industrial waste MITSUBISHI 1 1 FX2N 2LC Temperature Control Block Introduction 1 1 1 Outline of product The temperature control block FX2n 2LC hereafter referred to as temperature control block or FX2n 2LC equipped with two temperature input points and two transistor open collector output points is a special block to read temperature signals from thermocouples and platinum resistance thermometer bulbs and perform PID output control Connect the FX2N 2LC to the FX2N 2NC Series PC 1 As input sensors two thermocouples two platinum resistance thermometer bulbs or one thermocouple and one platinum resistance thermometer bulb are available 2 Data can be written and read using FROM TO instructions when the FX2n 2LC is connected to the FX2N 2Nc Series PC The FX2N 2LC performs arithmetic
47. f the FX2n 2LC make sure to use BFM 11 MITSUBISHI 77 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 9 7 2 10 7 2 11 7 2 12 BFM 12 CH1 and BFM 21 CH2 Set value SV BFM 12 stores the set value of CH1 BFM 21 stores the set value of CH2 The unit is C 0 1 C F or 0 1 F in accordance with the setting of the input type selection BFM 70 BFM 71 The allowable set range is the selected input range When the setting limiter CH1 BFM 47 and BFM 48 CH2 BFM 66 and BFM 67 is set the allowable set range corresponds to the setting limiter BFM 13 to BFM 16 CH1 and BFM 22 to BFM 25 CH2 Alarm 1 2 3 4 set value In BFM 13 to BFM 16 and BFM 22 to BFM 25 write the set value of each alarm selected by the alarm 1 2 3 4 mode setting BFM 72 to BFM 75 In the alarm 1 2 3 4 mode setting four among 14 alarm types can be arbitrarily selected 13 to BFM 16 CH1 and BFM 22 to BFM 25 CH2 are assigned to the alarm 1 mode the alarm 2 mode the alarm 3 mode and the alarm 4 mode respectively in the ascend ing order of BFM No for each channel The unit and the allowable range of the set value written to BFM 13 to BFM 16 CH1 and BFM 22 to BFM 25 CH2 vary depending on the selected alarm mode In accordance with the setting of the alarm mode setting BFM 72 to BFM 75 write a proper set value BFM 17 CH1 and BFM 26 CH2 Heater disconnection alarm set val
48. for such a case When the AT bias is set the set value SV AT point with which auto tuning is performed can be changed Measured value PV Example When the AT bias is set to Temperature set value SV AT bias AT point AT starts AT finishes BFM 46 CH1 and BFM 65 CH2 Normal reverse operation selection In BFM 46 select the normal or reverse operation of CH1 In BFM 65 select the normal or reverse operation of CH2 When BFM 46 65 is set to KO normal operation is selected When BFM 46 65 is set to K1 initial value reverse operation is selected Table 7 4 Normal operation 0 When actual temperature is higher than set value To control cooling Reverse operation 1 When actual temperature is lower than set value To control heating The initial value is reverse operation to control heating MITSUBISHI 7 18 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 30 47 and BFM 66 CH2 Setting the upper limit BFM 48 CH1 and BFM 67 CH2 Setting the lower limit In 47 and BFM 66 enter the upper range limit of CH1 and CH2 respectively In 48 and BFM 67 enter the lower range limit of CH1 and CH2 respectively Use these BFMs to set the upper and lower limits for the temperature set value SV BFM 12 BFM 21 The default range is 100 to 1300 C If the Set Value SV temp
49. ge is from 0 to 100 When BFM 39 58 is set to 0 0 the output change ratio limiter function is disabled When the output change ratio limiter is not used Output limiter upper limit Operation output value gt MV Output drastically changes Operation output value MV Output limiter lower limit Set how many percentages the operation output is to be changed in a second Drastic changes in output caused by power ON change of the set value disturbance etc When the power is turned on outside the proportional band or when the set value is consider ably changed the output does not drastically change but is performed in accordance with the preset inclination When the output change ratio limiter is set to a small value that is when the inclination is small the control response becomes slow and the effect of differential is eliminated While two position control is performed the output change ratio limiter is disabled While the output change ratio limiter is effective proper PID constants may not be obtained during auto tuning It is recommended not to use the output change ratio limiter when auto tuning is used MITSUBISHI 743 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 23 BFM 40 CH1 and BFM 59 CH2 Sensor correction value setting PV bias In BFM 40 set the sensor correction value of CH1 In BFM 59 set the sensor correction value of CH2 The
50. ge without notice
51. he text not to guarantee operation Mitsubishi Electric will accept no responsibility for actual use of the product based on these illustrative examples Owing to the very great variety in possible application of this equipment you must satisfy yourself as to its suitability for your specific application 4 MITSUBISHI vi FX2N 2LC Temperature Control Block Contents UP lg ec cd 1 1 1 1 Outhrie of pIOGUCE saure est pe pode cues met ee 1 2 2 PIOdUGECOBIQUEStIOD aso neut trabe estos salue ence etta ed 2 1 2 1 Outside dimension ae TO DELE 2 1 2 2 Name of each part s eet ERU ERE Reg ba Pa UM ue ur ai ce EE 2 1 2 97 ALON rapti pte eS ta peti a EA aaa tuae pita tud 2 2 2 4 Installation method e tete en un gan nen 2 3 2 5 Connection to PC Main oe een ed 2 4 3 SDOCIICatIORSu a um cR 3 1 3 1 Environmental specifications er 3 1 3 2 Power supply specifications nett 3 1 3 3 Performance specifications oo Cte fede 3 2 3 4 Input specifications is sans 3 3 35 2 101 span anae a apana euna ckiker 3 4 3 6 O tput specifications sssini a a eee eae 3 5 este tee cn er Me Tea EEE aaa i naha a 4 1 4 1 Wirges 4 2 5 Introduction of PUNGCUGINS 5 1 5 1 PID control
52. hen input is D wnscala short circuited Number of input points 2 points Current det ctor CTL 12 S36 8 or CTL 6 P H manufactured by U R D Co Ltd Heater When CTL o to 100 0 A current 12 is used CT input measured When CTL OO A value 6isused 0 z Larger one between 5 of input value and 2 A Measurement precision DR excluding precision of current detector Sampling period 1 second MITSUBISHI 3 3 FX2N 2LC Temperature Control Block Specifications 3 3 5 Input range Table 3 5 Sensor type K J R 5 200 016 200 0 50 290 919 200 0 0 100 0 400 0 100 0 400 00 eee 100 to 1300 100 010 800 0 C 010 1700 C 0 to 1700 C 3 100 to 1200 0 to 3200 F 0 to 3200 F 100 to 800 F 1000 2400 19019 1680 100 to 2100 F Sensor type E T B N 200 0 to 200 0 C 200 0 to 400 0 C ee Oto 400 0 C 0 to 1800 C 0 to 1300 C putrang Oto 1200 x 300 01o 400 0 F 0103000 0 to 2300 F 300 0 to 700 0 F 0 0 to 700 0 F Sensor type PL Il WRe5 26 U L usa 0 to 1200 C 0102300 C 200 010 600 0 C 0 0 to 900 0 C 0 to 2300 F 0103000 F 300 0 to 700 0 F 0101600 F Sensor type K J 50 0 to 150 0 50 0 to 150 0 C Inoutrange 200 0 to 500 0 C 200 0 to 600 0 putang 300 0 to 300 0 F
53. is ignored When measured value PV is less than alarm set Lower limit input value alarm Input 8 value an alarm is issued However when power is with wait E range turned on measured value is ignored When deviation Measured value PV Set 9 Upper limit deviation value value SV is more than alarm set value an alarm Input alarm with wait is issued However when power is turned on width measured value is ignored When deviation 2 Measured value PV Set 10 Lower limit deviation value value SV is less than alarm set value an alarm Input alarm with wait is issued However when power is turned on width measured value ignored MITSUBISHI 7 23 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 Table 7 8 Alarm n Set No Alarm type Description range When absolute deviation Measured value PV 41 Upper lower limit deviation Set value SV is more than alarm set value an Input value alarm with wait alarm is issued However when power is turned width on measured value is ignored When deviation Measured value PV Set value SV is more than alarm set value an alarm imi iati 12 upper devianon value is issued However when power is turned on and input alarm with re wait width when set value is changed measured value is ignored When deviation 2 Measured value PV Set ES es value SV is less than alarm set value
54. it p ten b14 AT ela par Remains ON while auto tuning is being performed formed Temperature rise completed Turns on after soak time BFM 80 is finished within tem b15 status perature rise completion range BFM 79 MITSUBISHI 7 5 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 Operation of b15 temperature rise completed status Example 1 When the soak time is set to 0 Set value SV gt Temperature rise completion range Temperature rise completed Example 2 When the soak time is set to any positive value Set value SV gt Temperature rise completion range Temperature rise completed This bit notifies that the measured value BFM 3 BFM 4 reaches near the set value BFM 12 BFM 21 When the measured value reaches the temperature rise completion range BFM 79 and the soak time BFM 80 is finished b15 of the event BFM 1 BFM 2 turns on MITSUBISHI 7 6 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 3 7 2 4 7 2 5 7 2 6 7 2 7 7 2 8 BFM 3 CH1 and BFM 4 CH2 Measured value PV BFM 8 stores the measured value of CH1 BFM 4 stores the measured value of CH2 The unit is C 0 1 C F or 0 1 F in accordance with the setting of the input type selection BFM 70 BFM 71 BFM 5 CH1 and BFM 6 CH2 Control output value MV B
55. l operation 4 tion 1 Reverse operation 47 66 Setting limiter upper limit Hite den Se range upper limit 48 67 Setting limiter lower limit Input Fang Owe imito Seting limiter upper limit Loop breaking alarm judgement Io redd sen 49 68 OOP 9 When 0 is set alarm function is 480 time disabled 50 69 Loop breaking alarm dead zone 0 0 or 0 to input span C F 0 0 70 71 Input type selection 0 to 43 2 72 Alarm 1 mode setting 0 73 Alarm 2 mode setting 0 0 to 14 74 Alarm 3 mode setting 0 75 Alarm 4 mode setting 0 76 Alarm 1 2 3 4 dead zone setting 10 0 to 10 0 span 1 0 77 Number of times of alarm 1 2 3 4 0 to 255 times 0 delay 78 Number of times of heater dis 3 to 255 times 3 connection alarm delay 79 Temperature rise completion 1 to 10 10 range setting 480 Temperature rise completion 0 to 3600 sec 0 soak time s MITSUBISHI 72 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 Table 7 1 BFM No ER Initial Name Description set range Remarks CH2 value 0 Monitors both ON current and 81 CT monitor method changeover OFF current 0 R W 1 Monitors only ON current 0 Normal 82 Set value range error address 1 or another numeric value Set 0 R ting error address 0 Normal 83 Set value backup command 1 Starts to write EEPROM 0 R
56. l operation changes the operation quantity in proportion to the area enclosed by the deviation size and the period of time in which deviation is generated In the proportional operation even while the operation quantity is stable deviation which is the difference between the set value SV and the measured value PV may be caused by natural radiation etc The integral operation eliminates such a deviation At this time the period of time required to obtain only by the integral operation the operation quantity equivalent to that obtained by the proportional operation is called the integral time As the integral time is shorter the integral efficiency is better The allowable set range is from 0 to 3 600 sec BFM 35 CH1 and BFM 54 CH2 Derivative time D In 35 set the derivative time of CH1 In BFM 54 set the derivative time of CH2 The derivative operation changes the operation quantity in proportion to the measured value change speed so that increase of deviation which is the difference between the set value SV and the measured value PV can be prevented from happening Because the derivative operation responds to the measured value change ratio the response to disturbances turbulence in the measured value caused by external factors is improved When the deviation increases or decreases at a constant ratio the period of time required to obtain only by the derivative operation the operation quantity equivalent to
57. lue ignored When absolute deviation Measured value PV 41 Upper lower limit deviation Set value SV is more than alarm set value an Input value alarm with wait alarm is issued However when power is turned width on measured value is ignored 4 MITSUBISHI 6 1 FX2N 2LC Temperature Control Block Alarm 6 Table 6 1 Alarm PT OK Set No Alarm type Description range When deviation 2 Measured value PV Set re value SV is more than alarm set value an alarm Upper limit deviation value Ms Input 12 is issued However when power is turned alarm with re wait width when set value is changed measured value is ignored When deviation 2 Measured value PV Set T EN value SV is less than alarm set value an alarm Lower limit deviation value Input 13 is issued However when power is turned on alarm with re wait width when set value is changed measured value is ignored When absolute deviation Measured value PV TE u Set value SV is more than alarm set value an Upper lower limit deviation ER Input 14 alarm is issued However when power is turned value alarm with re wait width on and when set value is changed measured value is ignored Input range Numeric value from the lower limit to the upper limit of input value Input width Width from the lower limit to the upper limit of i
58. m is issued range When deviation 2 Measured value PV Set 3 Upper limit deviation alarm value SV is more than alarm set value an alarm ih is issued When deviation Measured value PV Set tingut 4 Lower limit deviation alarm value SV is less than alarm set value an alarm ich is issued When absolute deviation Measured value PV iinput 5 Upper lower limit deviation Set value SV is more than alarm set value ah alarm is issued When absolute deviation Measured value PV 6 Range alarm Set value SV is less than alarm set value an mon alarm is issued pum When measured value PV is more than alarm set Upper limit input value alarm ee Input 7 value an alarm is issued However when power is with wait es range turned on measured value is ignored When measured value PV is less than alarm set Lower limit input value alarm as Input 8 value an alarm is issued However when power is with wait ER range turned on measured value is ignored When deviation Measured value PV Set 9 Upper limit deviation value value SV is more than alarm set value an alarm Input alarm with wait is issued However when power is turned on width measured value is ignored When deviation Measured value PV Set 10 Lower limit deviation value value SV is less than alarm set value an alarm Input alarm with wait is issued However when power is turned on width measured va
59. main unit through buffer memories hereafter referred to as BFM Each BFM consists of 16 bits Use FROM TO instructions in the 16 bit format 7 1 Buffer memory list Table 7 1 BFM No Initial Name Description set range Remarks CH1 CH2 value 0 Flag Error flag ready flag etc 0 iH 42 Event Alarm status temperature rise 0 completed status etc 3 4 Measured value PV 5 of input range C F 0 0 R 5 6 Control output value 5 0 to 105 0 5 0 7 8 Heater current measured value 0 0 to 105 0 A 0 0 0 Performs nothing 9 Initialization command 1 Initializes all data 0 2 Initializes BFM 10 to BFM 69 10 Error reset command 0 Perarms 0 1 Resets errors 0 Stops control 11 Control start stop changeover 1 Starts control 0 12 21 Set value SV Within set range limiter 0 0 13 22 Alarm 1 set value Unit C or F 0 0 14 23 Alarm 2 set value Allowable set range varies 0 0 RW 15 24 Alarm 3 set value depending on alarm mode set 0 0 16 25 Alarm 4 set value ung 0 0 0 0to 100 0 A 17 26 Heaierdisconnegionalarmi sel When 0 0 is set alarm function 0 0 value Soot is disabled 18 27 Auto manual mode changeover 0 AUTO 1 MAN 0 19 28 Manual output set value 5 0 to 105 0 96 1 0 0 20 29 Auto tuning execution command M Stops auto tuming 0 1 Performs auto tuning 30 Unit type code 2060 R 31 Prohibited 0 Monitor 32 51 Ope
60. ms temperature control PID control and gives the control output The setting of KO to K2 above is effective only when control starts BFM 11 While control is stopped only monitor is performed without regard to the setting described above BFM 33 CH1 and BFM 52 CH2 Proportional band P In BFM 33 set the proportional band of CH1 In BFM 52 set the proportional band of CH2 The proportional band is required to give the control output in proportion to the deviation which is the difference between the set value SV and the measured value PV As the proportional band value is larger changes in the control output value MV in response to changes in the input is smaller On the contrary as the proportional band value is smaller changes in the control output value MV in response to changes in the input is larger Gener ally the proportional band is the inverse number of the proportional gain However the proportional band value is too large overshoot becomes large and it takes con siderable time until the output is stabilized at the set value The allowable set range is from 0 0 to 1 000 0 When BFM 33 52 is set to 0 0 two position control is performed MITSUBISHI 79 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 18 7 2 19 BFM 34 CH1 and BFM 53 CH2 Integral time 1 In BFM 34 set the integral time of CH1 In BFM 53 set the integral time of CH2 The integra
61. n 100 When measured value PV does not increase at least by loop break or output limiter upper limit ae criteria 2 C within loop breaking set time an alarm is Abnormality targets 1 Abnormality in control target Heater disconnection lack of power supply wiring mistake etc 2 3 4 5 Abnormality in sensor Sensor disconnection short circuit etc Abnormality in operating machine Molten relay wiring mistake etc Abnormality in output circuit Molten relay inside instrument etc 2 ese wet s Abnormality in input circuit No change in the measured value PV even after input has changed Note When the auto tuning function is used the LBA set time is automatically set to the inte gral time result multiplied by 2 The LBA set time does not change even if the integral value changes While auto tuning is performed the loop breaking alarm function is disabled If the LBA set 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 LBA set time in accordance with the situation 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 MITSUBISHI 5 9 FX2N 2LC Temperature Control Block Introduction of Functions 5 MITSUBISHI 5 10 FX2N 2LC T
62. nd upper limit deviation alarm Measured value PV Measured value PV Alarm set value gt Dead zone Non alarm status Alarm status Alarm status Lower limit input value alarm and lower limit deviation alarm Measured value PV Measured value PV Dead zone Alarm set value gt Non alarm status Alarm status Alarm status Upper lower limit deviation alarm Measured value PV Measured value PV Alarm set gt value Temperature set value SV Alarm set value gt Alarm status Non alarm status Alarm status MITSUBISHI 7 25 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 36 BFM 77 Number of times of alarm 1 2 3 4 delay In BFM 77 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 num ber of alarm delays an alarm is issued The allowable set range is from 0 to 255 times input sampling cycle 500 ms Example When the number of alarm delays is set to 5 times Measured value PV
63. ning the terminals If you clean the unit or tighten the terminals while the power is supplied you may get electrical shock Thoroughly read the manual sufficiently assure safety then perform temperature control An operation mistake may cause damages in the machine or accidents Never disassemble or modify the unit Disassembly or modification may cause failure malfunction or fire For repair contact Mitsubishi Electric System Service Turn off the power before connecting or disconnecting a connection cable such as exten sion cable If you connect or disconnect a connection cable while the power is supplied failure or malfunction may be caused MITSUBISHI 8 1 FX2N 2LC Temperature Control Block Program Example 8 8 1 Program example This paragraph introduces an example of program to operate the FX2n 2LC Condition Input range PID values Alarm Alarm dead zone Control response Operation mode Control output cycle Normal reverse operation Loop breaking alarm judgement time Temperature rise completion range CT monitor method Model K 100 0 to 400 0 C Set by auto tuning Upper limit deviation alarm with re wait and lower limit deviation alarm with re wait 1 initial value Medium Monitor Temperature alarm Control initial value 30 sec initial value Reverse operation initial value 480 sec initial value 3 C ON current OFF current initial
64. nput value Input width Upper limit value Lower limit value Input width Both a positive and negative numeric values can be set Input width Only a positive numeric value can be set MITSUBISHI 6 2 FX2N 2LC Temperature Control Block Alarm 6 Upper limit input value alarm When the measured value PV is more than the alarm set value an alarm is issued Measured value PV Measured value PV Alarm set value gt Non alarm status Alarm status Alarm status Lower limit input value alarm When the measured value PV is less than the alarm set value an alarm is issued Measured value PV Measured value PV Alarm set value gt 2 Alarm status Non alarm status Alarm status Upper limit deviation alarm When the deviation Measured value PV Set value SV is more than the alarm set value an alarm is issued lt When the deviation is positive gt lt When the deviation is negative gt Measured value Measured value PV yas PV Measured value PV Alarm set Temperature value Devia set value SV tion Alarm set gt Temperature gt set value SV value Time Alarm status Alarm status Non alarm Alarm status status MITSUBISHI 6 3 FX2N 2LC Temperature Con
65. ock Buffer Memory BFM 7 7 2 2 BFM 1 CH1 and BFM 2 CH2 Event BFM 1 corresponds to CH1 BFM 2 corresponds to CH2 Assignment is equivalent between BFM 1 and BFM 2 Table 7 3 Bit No Assignment Description 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 com Turns on when an error has been caused by noise or when pensation data error a failure has occurred in FX2N 2LC If contents of error are not eliminated even after power is b3 A D converted value error turned off once then on again contact Mitsubishi Electric System Service b4 Alarm 1 Turns on when an alarm has occurred b5 Alarm 2 Turns on when an alarm has occurred b6 Alarm 3 Turns on when an alarm has occurred b7 Alarm 4 Turns on when an alarm has occurred 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 meltdown alarm Turns on when a heater meltdown alarm has occurred b11 Not used Decimal point position b12 0 Unit 1 C F 1 Unit 0 Turns on when input range is set to 0 1 C F 1 C F in Turns on when transition to manual mode is completed Manual mode transition com b13 leted Only while b13 is ON manual output set value can be wr
66. ock Diagnostic 9 9 Diagnostic By reading the flags BFM 0 and the events BFM 1 and BFM 2 using FROM instructions you can confirm errors such as lack of the driving power supply 24 V heater disconnection and loop breaking which can be recognized by the FX2n 2LC Table 9 1 Flags BFM 0 indicating errors Bit No Description Operation Error present Turns on when an error among b1 to b10 below has occurred b1 Set value range error Turns on when data outside set range is written b2 24 VDC power supply error Turns on when driving power supply 24 VDC is not supplied b3 Set value backup error Turns on when an error has been caused by noise or when a fail ure has occurred in FX2N 2LC If contents of error are not eliminated even after power is turned off once then on again contact Mitsubishi Electric System Ser vice b8 Sum check error for adjustment data error b9 Cold contact temperature compensation data error b10 A D converted value error Turns on when an error has been caused by noise or when a fail ure has occurred in FX2N 2LC If contents of error are not eliminated even after power is turned off once then on again contact Mitsubishi Electric System Ser vice Events BFM 1 and BFM 2 indicating errors Table 9 2 Events BFM 1 and BFM 2 indicating errors
67. ocumentation However to continue this pro cess of improvement the comments of the Mitsubishi users are always welcomed This page has been designed for you the reader to fill in your comments and fax them back to us We look forward to hearing from you Fax numbers YOUN Name a erh Mitsubishi Electric 111 America 01 847 478 2253 Your company Australia 02 63870727 a Germany 0 21 02 4 86 1 12 YO r locato N ee South Africa 027 11444 0223 arai a alte United Kingdom 01707 278 695 Please tick the box of your choice What condition did the manual arrive in LlUnusable Will you be using a folder to store the manual L Yes LINo What do you think to the manual presentation L Tidy L1Un friendly Are the explanations understandable OYes LINot too bad lUnusable Which explanation was most difficult to Are there any diagrams which are not clear LINo IESO WNICHE ae IM ETE What do you think to the manual layout _LINot too bad LlUn helpful If there one thing you would like to see improved what is it Thank you for taking the time to fill out this questionnaire We hope you found both the product and this manual easy to use MITSUBISHI i FX2N 2LC Tempereture Control Block MITSUBISHI FX2
68. operation Alarm status region Alarm status region Low Temperature set value SV LBD set value High 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 LBD operation gap 0 01 FS MITSUBISHI 7 21 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 33 70 CH1 and BFM 71 CH2 Input type selection In BFM 70 select the input type of CH1 In BFM 71 select the input type of CH2 The initial value is 2 Table 7 7 Rae pane Input range Unit Be d posu Input range Unit 0 200 0 to 200 0 10 1 24 5 to 1800 C 1 100 0 to 400 0 10 1 25 0 3000 F 2 K 100 to 1300 C 26 N 0 to 1300 C 3 100 to 800 F 27 0 to 2300 F 4 100 to 2400 F 28 Stan 0 to 1200 C 5 200 0 to 200 0 10 1 29 0 to 2300 F 6 100 0 to 400 0 10 1 30 0 to 2300 C WRe5 26 7 J 100 0 to 800 0 10 1 31 3000 F 8 100 to 1200 C 32 U 200 0 to 600 0 10 1 C 9 100 to 1600 F 33 300 0 to 700 0 10 1 F 10 100 to 2100 F 34 0 0to900 0 10 1 11 B 0 to 1700 C 35 0
69. or If contents of error are not eliminated even after power is turned off once then on again contact Mitsubishi Electric System Service b4 Not used b5 Not used b6 Not used b7 Not used bg Sum check error for adjustment Turns on when an error has been caused by noise or when data error a failure has occurred in FX2N 2LC b9 Cold contact temperature com contents of error are not eliminated even after power is pensation data error turned off once then on again contact Mitsubishi Electric b10 converted value error System Service b11 Not used b12 Controlling flag Turns on when FX2N 2LC is performing control Remains ON while set values are being backed up b13 Setvalue being backed up Refer to 7 2 42 b14 Initialization completion flag Turns on when initialization is completed b15 Temperature control ready flag Turns on when FX2N 2LC becomes ready for operation Operation of b15 Temperature control ready flag Temperature control ready flag Power is turned on It takes 500 ms maximum Initialization of temperature control CPU is completed Description on operation 1 When the power is turned on and initialization of the temperature control CPU is com pleted the temperature control ready flag turns on 2 While the temperature control ready flag is ON the FX2N 2LC accepts TO instructions 74 4 MITSUBISHI FX2N 2LC Temperature Control Bl
70. r upper limit Output limiter lower limit Output limiter lower limit Temperature Temperature Target value Target value gt Large overshoot MITSUBISHI 5 2 FX2N 2LC Temperature Control Block Introduction of Functions 5 5 2 Two position control When the proportional band P value is set to 0 0 the FX2n 2LC performs two position con trol In two position control the control output MV is set to ON when the measured value PV is larger than the temperature set value SV or OFF when the measured value PV is smaller than the temperature set value SV When the adjustment sensitivity dead zone is set repetitious turning ON OFF of the output around the temperature 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 drastic repetitious turning ON OFF may be caused by small oscilla tions of measured values a duo Su i Adjustment sensitivity dead zone The adjustment sensitivity is equally given to the upper portion and the lower portion of the temperature set value SV Operation output value MV MITSUBISHI 5 3 FX2N 2LC Temperature Control Block Introduction of Functions 5 5 3 5 3 1 Auto tuning function AT auto tuning
71. ration mode I Monitor Temperature alarm 5 2 Monitor Temperature alarm Control 0 0 to 1 000 0 span RW x 33 52 Proportional band When 0 0 is set two position 3 0 control is performed 34 53 Integral time 1 to 3 600 sec 240 35 54 Derivative time 0 to 3 600 sec 60 s MITSUBISHI 7 1 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 Table 7 1 BFM No m Initial Name Description set range Remarks CH1 2 value 36 55 Control response parameter 0 Slow 1 Medium 2 Fast 0 37 56 Output limiter upper limit a hter iawer hmat 1071030 100 0 38 57 Output limiter lower limit 5 0 to output limiter upper limit 0 0 0 0 to 100 0 sec 39 58 Output change ratio limiter When 0 0 is set function is dis 0 0 abled Sensor correction value setting 40 59 PV bias 50 00 span 0 00 pat dead 0 0 to 10 0 span 1 0 zone setting 42 61 Control output cycle setting 1 to 100 sec 30 0 to 100 sec 43 62 Primary delay digital filter setting When 0 is set function is dis 0 abled 0 0 to 100 0 min 44 63 Setting change ratio limiter When 0 0 is set function is dis 0 0 abled 45 64 AT auto tuning bias Input span C F 0 0 46 65 Normal reverse operation selec 0 Norma
72. rent 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 can be measured using buffer memories BFM 7 BFM 8 Connection example Power supply Temperature control block Control output Operating P machine SSR FX2N 2LC Current detector d Current detector input Heater Measured Sensor value PV a Control target Alarm operation The heater disconnection detection function issues an alarm in the following cases 1 When the heater current does not flow Caused by heater disconnection error in operating machine etc When the reference heater current 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 5 sec or less heater disconnection alarm is not issued 2 When the heater current does not turn off Caused by molten relay etc When the reference heater current 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 5 sec or less heater disconnection alarm is not issued Current detector CTL 12 S36
73. s the period of time after the measured value reaches the temperature rise completion range until the temperature rise completion flag turns on In order to cope with a case in which the measured value has reached the temperature rise completion range but is not stable yet by setting the soak time the wait time can be set for judgement on temperature rise completion Example 1 When the soak time is set to 0 Set value SV gt Temperature rise completion range _ Temperature rise completion Example 2 When the soak time is set to any positive value Set value SV gt Temperature rise completion range _ Temperature rise completion MITSUBISHI 7 27 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 40 BFM 81 CT monitor method changeover 7 2 41 In BFM 81 change over the CT monitor method This setting is applied to both CH1 and CH2 The current is detected by sampling performed every second While the temperature is controlled the control output repeatedly turns on and off ingly the current in the ON time ON current and the current in the OFF time OFF current are alternately displayed If the output cycle is short the displayed value is not stable and is difficult to read To cope with this the display monitor method can be selected When BFM 481 is set to KO initial value the ON current and the OFF current ar
74. set value are treated as the dead zone width of 10 in total The allowable set range is from 0 0 to 10 0 Example Condition When BFM 41 60 is set to 10 0 in the range span of 400 C 400 C x 10 0 100 40 When the temperature set value is 200 C the range from 180 to 220 C is treated as the dead zone Temperature i itiyi set value SV Adjustment sensitivity dead zone The adjustment sensitivity setting is given to both the upper portion and the lower portion of the temperature set value SV Control output value MV When the adjustment sensitivity dead zone is set to a large value vertical fluctuation becomes large When the adjustment sensitivity is too small small oscillations of the measured value cause chattering BFM 42 CH1 and BFM 61 CH2 Control output cycle setting In BFM 42 set the control output cycle of CH1 In BFM 61 set the control output cycle of CH2 Set the period of time in which the output turns on and off The value set here multiplied by the control output value is treated as the ON time The value set here multiplied by 100 Control output value is treated as the OFF time The allowable set range is from 1 to 100 sec ON OFF Control output Control output cycle 4 MITSUBISHI 7 15 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 26 BFM 43 CH1 and BFM 62 CH2 Primary delay digital filter se
75. sured 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 Measured value PV Temperature set gt value SV Deviation Alarm set value gt Set value is changed Temperature set value SV1 Alarm set value Deviation Time gt Wait operation region Wait operation region Non alarm status Alarm status Alarm status MITSUBISHI 6 5 FX2N 2LC Temperature Control Block Alarm 6 MITSUBISHI 6 6 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 1 Introduction x 2 Product Configuration x 3 Specifications x 4 Wiring x 5 Introduction of Functions x 6 Alarm x 7 Buffer Memory BEM x 8 Program Example x 9 Diagnostic x MITSUBISHI FX2N 2LC Temperature Control Block Buffer Memory BFM 7 MITSUBISHI FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 Buffer Memory Each setting and alarm in the FX2n 2LC is written from or read to the PLC
76. t from driving power supply terminal Driving power supply Beds SUPERI SONNE 5 VDC supplied from inside of PC main unit Current consumption 24 VDC 55 mA and 5 VDC 70 mA Analog input area and PC are insulated by photocoupler Power supply and analog input are insulated by DC DC converter Channels are not insulated each other Insulation method nn 8 points in total including input points and output points MITSUBISHI 3 1 FX2N 2LC Temperature Control Block Specifications 3 3 3 Performance specifications Table 3 3 Item Description Control method Two position control PID control with auto tuning function PI control Control operation period 500 ms Set temperature range Equivalent to input range Refer to 7 2 33 Alarm is detected in accordance with setting of buffer memory Variable within range from 0 0 to 100 0 A 0 Measured value monitor 1 Measured value monitor Temperature alarm 2 Measured value monitor Temperature alarm Control Selected by buffer memory Heater disconnection detection Operation mode Adjustment data and input value are checked by watch dog timer When abnormality is detected transistor output turns off Memory Built in EEPROM Number of times of overwrite 100 000 times Self diagnosis function POWER Lit green 5 V power is supplied from PC main unit Exting
77. t range is from 0 1 to 100 0 When BFM 44 63 is set to 0 the setting change ratio limiter function is disabled and the set value immediately changes Example When the temperature set value 1 SV1 is changed to the temperature set value 2 SV2 When the set value is changed to a larger value A Set by how many percentages of the span the set value is to increase in a minute The set value is changed When the power is turned on the PV changes to the SV step by step if the change ratio limiter function is used When the setting change ratio limiter function is used When the alarm function is used the alarm wait function is not performed while the PV is changing to the SV step by step MITSUBISHI 747 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 28 7 2 29 BFM 45 CH1 and BFM 64 CH2 AT auto tuning bias In BFM 45 set the AT auto tuning bias of CH1 In BFM 64 set the AT auto tuning bias of CH2 The allowable set range is input range span C F Set the AT bias for control targets in which the measured value PV should not exceed the temperature set value SV while auto tuning is performed The auto tuning function performs two position control using the temperature set value SV hunts the measured value PV then calculates and sets each PID constant However for some control targets overshoot caused by hunting is not desirable Set the AT bias
78. te the term completed equipment refers to a third party constructed device which contains or uses the product associated with this manual Notes on the Symbols Used in this Manual At various times through out this manual certain symbols will be used to highlight points of information which are intended to ensure the users personal safety and protect the integrity of equipment Whenever any of the following symbols are encountered its associated note must be read and understood Each of the symbols used will now be listed with a brief description of its meaning Hardware Warnings 1 Indicates that the identified danger WILL cause physical and property damage 2 Indicates that the identified danger could POSSIBLY cause physical and property damage 3 Indicates a point of further interest or further explanation ODD o s z gt Q o 4 Indicates special care must be taken when using this element of software 5 Indicates a special point which the user of the associate software element should be aware of 6 Indicates a point of interest or further explanation Qoo 4 MITSUBISHI v FX2N 2LC Tempereture Control Block Under no circumstances will Mitsubishi Electric be liable responsible for any consequential damage that may arise as a result of the installation or use of this equipment All examples and diagrams shown in this manual are intended only as an aid to understand ing t
79. trol Block Alarm 6 Lower limit deviation alarm When the deviation Measured value PV Set value SV is less than the alarm set value an alarm is issued lt When the deviation is positive gt lt When the deviation is negative gt value Measured value Measured value PV PV Measured value PV Alarm set E Temperature value Devia set value SV Temperature tion Alarm set value gt set value SV Time Alarm status Alarm status Non alarm status Upper lower limit deviation alarm 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 Temperature set value SV gt Deviation Alarm set value Deviation gt Time Non alarm status Alarm status Alarm status Range alarm When the absolute deviation Measured value 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 rang
80. tting In BFM 443 set the primary delay digital filter of CH1 In BFM 62 set the primary delay digi tal filter of CH2 The FX2N 2LC is equipped with the software input filter so that fluctuation of the measured value PV caused by noise can be reduced The time constant of this input filter can be set in accordance with the characteristics of the control target and the noise level If the time constant is too small the input filter cannot give required effect If the time constant is too large the input responsibility is deteriorated The allowable set range is from 0 to 100 sec When BFM 43 62 is set to 0 the filter func tion is disabled While the filter function is disabled data is acquired in the sampling cycle 500 ms Input of actual measured value PV Pulse input caused by noise Y Input of measured value PV processed by the primary delay digital filter Input amplitude dass Amplitude processed by E the filter x MITSUBISHI 7 16 FX2N 2LC Temperature Control Block Buffer Memory BFM 7 7 2 27 BFM 44 and BFM 63 CH2 Setting change ratio limiter In BFM 44 set the setting change ratio limiter of CH1 In BFM 63 set the setting change ratio limiter of CH2 The setting change ratio limiter function changes step by step the difference in the temperature set value when the temperature set value is changed Set the variation 96 per minute The allowable se
81. ue In BFM 17 set a value to recognize heater disconnection in CH1 In BFM 26 set a value to recognize heater disconnection in CH2 When the heater current measured value of each channel input from CT is smaller than the value set to BFM 17 CH1 or BFM 26 CH2 the heater disconnection alarm CH1 BFM 1 b9 CH2 BFM 2 b9 turns on The display range is from 0 0 to 100 0 A When BFM 17 26 is set to 0 0 the heater disconnection alarm function is disabled BFM 18 CH1 and BFM 27 CH2 Auto manual mode changeover In BFM 18 change over the mode of CH1 In BFM 27 change over the mode of CH2 When BFM 18 27 is set to KO initial value the auto mode is selected When BFM 18 27 is set to K1 the manual mode is selected Auto mode The measured value PV is compared with the temperature set value SV PID arithmetic operation is performed then the control output MV is given In the auto mode the manual output set value CH1 BFM 19 CH2 BFM 28 is always equivalent to the control output value Manual mode The control output MV value is fixed to the manual output set value CH1 BFM 19 CH2 BFM 28 The manual output set value can be changed while b13 of the event CH1 BFM 1 CH2 BFM 2 is ON even if operation is performed in the manual mode The temperature alarm function is effective even in the manual mode MITSUBISHI 78 FX2N 2LC Temperature Control Block Buffer Memory BFM 7
82. ue BFM 13 to BFM 16 CH2 set value BFM 22 to BFM 25 CH1 alarm result BFM 1 b4 to b8 CH2 alarm result BFM 2 b4 to b8 Or a same alarm type can be set to two or more BFM Nos The initial value is alarm function OFF For the details refer to Section 6 Table 7 8 Alarm nm Set No Alarm type Description range 0 Alarm function OFF Alarm function is disabled en When measured value PV is more than alarm set Input 1 Upper limit input value alarm ne value an alarm is issued range TM When measured value PV is less than alarm set Input 2 Lower limit input value alarm S value an alarm is issued range When deviation 2 Measured value PV Set input 3 Upper limit deviation alarm value SV is more than alarm set value an alarm AGIR is issued When deviation Measured value PV Set 4 Lower limit deviation alarm value SV is less than alarm set value an alarm SU is issued When absolute deviation Measured value PV siibut 5 Upper lower limit deviation Set value SV is more than alarm set value ad alarm is issued When absolute deviation Measured value PV input 6 Range alarm Set value SV is less than alarm set value an WR alarm is issued Pert When measured value PV is more than alarm set Upper limit input value alarm i Input 7 value an alarm is issued However when power is with wait E range turned on measured value
83. uished 5 V power is not supplied from PC main unit Lit red 24 V power is supplied from outside Status Extinguished 24 V power is not supplied from outside indication m Lit red OUT output is ON Extinguished OUT1 output is OFF Lit red OUT output is ON OUT2 Extinguished OUT2 output is OFF MITSUBISHI 3 2 FX2N 2LC Temperature Control Block Specifications 3 3 4 Input specifications Table 3 4 Item Description Number of input points 2 points bos K J R S E T B PLII WRe5 26 U L Input type Resistance thermome 00 JPt100 ter bulb t 0 7 of range span 1 digit 0 3 96 of range span 1 digit when ambient temperature is Measurement precision p However 0 to 399 C 0 to 799 F in B inputs as well as 0 to 32 F in PLII and WRe5 26 inputs are outside precision guar antee range Cold contact tempera igen san ae aor However within 2 0 C while input value is 100 to 150 C oe p within 3 0 C while input value is 150 to 200 C inpu p Basol tion 0 1 0 1 F or 1 C 1 F Varies depending on input range of used sensors Sampling period 500 mS Effect of external resis an Approx 0 35 uV Q Input impedance 1 M Q or more Sensor current Approx 0 3 mA Allowable input lead wire 10 Qorless resistance Operation when input is disconnected Upscale Operation w

FX2N-2LC Temperature Control Block USER'S MANUAL

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