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1746-6.16, Thermocouple/mV Isolated Input Module User Manual

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1. Module Input Image Output Image Diagnostics and 8 words Troubleshooting E 5 E p 8 Word 0 Channel 0 Data Word E 4 u E 1 5 i rus ded Word1 Channel 1 Data Word b B f S E g Application 3 lt U Examples Word 2 Channel 2 Data Word t y H i i L 2 Word 3 Channel3 Data Word 0 3 5 0 5 ju Channel 0 Status Word lt 0 0 0 0 1 0 0 0 0 0 O O 0 Of 0 0 Channel 1 Status Word Bit 15 Address Bit 0 Channel 2 Status Word Word7 Channel 3 Status Word For this example during normal operation only bit 11 is set Publication 1746 6 16 January 1999 2 5 Chapter 2 Quick Start Channel Configuration Worksheet Select your bit configurations Write them at the bottom of the worksheet Use one worksheet for each channel Channel Configuration Word 0 e 0 through O e 3 Bit Descriptions Set these bits in the Channel Configuration Word Bit s Define To Select a IE SIN Description TC Type J jv 0 of oj o TC Type K oooiProet 1 1 TC TypeT olo 1 o SlotNumber TC Type E 0 0 1 1 Channel Number TC Type R 0 1 0 0 TC Type S 0 1 0 1 TC Type B 0 1 1 0 C Tyoe N 0 1 11 Configure t
2. 0 0 0 0 1 0 0 X 0 0 0 0 0 0 1 Of ChannelO Ambient 0 00 0 1 0 0 X 0 0 0 0 0 0 0 0 Channel 1 Bath 0 00 0 1 0 0 X 0 0 0 0 0 0 0 1 Channel2 Steam 0 0 0 0 1 0 0 X 0 0 0 0 0 0 0 0 Channel3 Chilled H20 0 0 0 0 1 0 0 X 0 0 0 0 1 1 1 1 Channel3 Cabinet 9 4 Publication 1746 6 16 January 1999 Chapter 9 Application Programming Examples Program Setup 1 Set up two configuration words for each channel in file N10 one for C and the other for F Include two configuration words for the CJC temperature in the cabinet containing the SLC controller Channel Configuration Word Addresses eF eC 0 N10 0 N10 4 N10 1 N10 5 2 N10 2 N10 6 3 N10 3 N10 7 gc N10 8 N10 9 2 Write ladder logic to send channel configurations to the module when the operator changes the C F or the ambient cabinet selector switch The OSR instruction one shot rising makes these configuration changes edge triggered i e the module is reconfigured once each time the operator changes a switch position 3 Write ladder logic to monitor the channel 0 status word to determine whether ambient or cabinet temperature is being displayed and energize the appropriate pilot light 4 Write ladder logic to convert thermocouple data words
3. r 9 9 Terminal CJC Sensors OS Block Release 3 Screws ESI Cae QAI e Module Installation Procedure 1 Align the circuit board of the thermocouple module with the card guides located at the top and bottom of the chassis Figure 3 1 Slide the module into the chassis until both top and bottom retaining clips are secured Apply firm even pressure on the module to attach it to its backplane connector Never force the module into the slot 3 Cover unused slots with the Card Slot Filler Catalog Number 1746 N2 To remove press the releases at the top and bottom of the module and slide the module out of the chassis slot 3 3 Chapter 3 Installation and Wiring Wiring the Module 3 4 Figure 3 1 Installing the Module into the I O Chassis Card Guides Top and Bottom Releases The module contains a green 18 position removable terminal block Terminal Block Spare Part Catalog Number 1746 RT32 CJCA CJ C Assembly gt CJCA y Do NOT use these connections See Figure 3 2 N CJC B CJ C Assembly gt CJC B Release Screw Ch Ch Ch Ch Ch Ch Ch Ch an an an an an an an an Release Screw nel 0 nel 0 nel 14 nel 1 nel 24 nel 2 nel 3 nel 3 Do not co
4. Type E Thermocouple 2 0 LT 1 700C 250 C 15 Resolution C 1 0 0 5 0 04 C 365 C 0 05 C 1000 C 0 300 150 0 150 300 450 600 750 900 1050 1200 Temperature C Type R Thermocouple 0 75 F 0 689C 0 C 0 60 Resolution CO 0 45 0 26 C 885 C 0 30 0 28 C 1750 C 0 15 0 jt ji I I 300 150 0 150 300 450 600 750 900 1050 1200 1350 1500 1650 1800 Temperaturd C A 6 Publication 1746 6 16 January 1999 Appendix A Specifications Type S Thermocouple 0 75 F 0 68 C 0 C 0 60 0 45 Resolution ec 0 319C 885 C 0 31 C 1750 C 0 30 0 15 0 1 i ji 1 1 1 1 1 1 1 1 1 1 300 150 0 150 300 450 600 750 900 1050 1200 1350 1500 1650 1800 Temperature C Type T Thermocouple 2 0 1 5 Resolution C 1 0 0 5 0 08 C 65 C 0 05 C 400 C 300 150 0 150 300 450 600 Temperature C Publication 1746 6 16 January 1999 A 7 Appendix A Specifications Type B Thermocouple 1 20 1 13 C 300 C 0 90 Resolution C 0 60 0 38 C 1060 C 0319 1 0 30 0 1 1 1 1 1 1 1 1 1 1 1 ji 1 1 1 300 150 0 150 300 450 600 750 900 1050 1200 1350 1500 1650 1800 1950 Temperature C Type N The
5. Input Image Output Image Programming words Examples Address Address 1 0 Chapter 8 1 0 Word0 ChannelODataWord lt ol ol ol ol ol ol ol ol ol ol ol ol ol ol ol ol Application 1 1 Word1 Channel 1 Data Word Bit15 Variable Thermocouple Input Data Bito Examples l 1 2 Word2 Channel2 Data Word In this example the module is located in slot 1 1 3 Word3 Channel 3 Data Word Channel 0 Status Word Channel 1 Status Word R Channel 2 Status Word 1 7 Word7 Channel 3 Status Word KA Apply Power and Download Your Program Reference Chapter 7 Apply power Download your program to the SLC and put the controller into Run mode In this Module example during a normal start up the module status LED and channel status 0 LED turn on Diagnostics and Troubleshooting INPUT ISOLATED 0 2 74 STATUS TT s Channel LEDs MODULE STATUS L 1 Module Status LED THERMOCOUPLE mV ES Troubleshooting Reference Monitor the status of input channel 0 to determine its configuration setting and operational status Chapter 5 This is useful for troubleshooting when the blinking channel LED indicates that an error has been Channel flagged If the Module Status LED is off or if the Channel 0 LED is off or blinking refer to chapter 7 Configuration Data and Status SLC 500 Controller Pd Data Files TER Chapter 7
6. Bit Defi To Select Set these bits in the Channel Configuration Word Description WS Reine oseect Ma 10 9 8 7 6 5 4 3 2 1 0 P TC Type J 0 0 0 0 TC Type K 0 0 0 1 TC Type T 0 0 1 0 TC Type E 0 0 1 1 TC Type R 0 1 0 0 TC Type S 0 1 0 1 TC Type B 0 11 1 0 Configure the channel for the input type connected to it Valid inputs are thermocouples and analog input signals of 03 Input TCTypeN 0 1 1 1 50mv and 100mV You can configure the channel to Type 50mV 1 0f 0 0 read the cold junction CJ C temperature When reading 100mV 1 olola aa C temperature the channel ignores the physical input TC Type C 1 0 1 0 TC Type D 1 0 1 1 Invalid 1 1 0 0 Invalid VAIAS 1 Invalid HAFT CJC Temp 1 1 1 1 i Select the channel data format from EE ul Engineering units EU x1 or x10 For EU x1 values are in 0 1 degrees or 0 01mV Data Engr Units x10 0 1 For EU x10 values are in whole 9C or F or 0 1mV 4 5 Format Scaled for PID value is the same for any input type Scaled for P ID 1 0 Proportional input signal range is scaled to 0 16 383 counts Proportional counts value is same for any input type Counts 11 Proportional input signal range is scaled to 32 767 counts aun For more information refer to next page Select module response to a detected open circuit from Zero 0 0 Zero to force the channel data word to zero Upscale to force the channel data word to full scale 67 Ta i
7. Important At this point the software does the following automatically allocates slot numbers consecutively for the configured set of I O racks For example slots 1 7 if you configured racks 1 and 2 at 4 slots each places an asterisk next to each slot number configured in steps 3 5 6 To designate the I O module for the subject slot in the I O rack cursor to the subject slot number and press MODIFY SLOT F5 The screen lists the types of I O modules 7 With PAGE and 1 keys cursor to the module type for the subject slot and press SELECT MODULE F2 The screen displays the module type in the row for the subject slot 8 To assign I O modules to remaining I O slots repeat steps 6 and 7 9 If the subject I O module is not listed step 6 cursor to the bottom of the list and select OTHER Then type the module ID code and press ENTER the ID code for 1746 INT4 is 3515 The screen inserts the module ID code in the row for the subject slot 10 After configuring your I O to exit press EXIT F8 SAVE amp EXIT F8 You get the prompt NEW ARCHIVE FILE CREATED SAVE TO FILE F9 You get the prompt NEW CONFIGURATION SAVED TO FILE ESC RETURN TO MAIN MENU F3 5 4 Publication 1746 6 16 January 1999 Chapter 5 Accessing Files to Configure 1 0 Return to an Existing File If you already created the program file for your application and want to add or edit ladder logic
8. Data Engr Units x10 0 1 For EU x10 values are in whole C or F or 0 1mV 4 5 Format Scaled for PID value is the same for any input type Scaled for PID 1 0 Proportional input signal range is scaled to 0 16 383 counts Proportional counts value is same for any input type Counts 1l1 Proportional input signal range is scaled to 32 767 counts For more information refer to chapter 6 Zero 0 0 Select module response to a detected open circuit from Zero to force the channel data word hja Upscale to force the channel data word to full scale T e Upscale UE Downscale to force channel data word to low scale Mod D 10 Important A bit selection or 1 1 is invalid oca SUNS Se For an open CJ C thermistor mV channels are not affected Important The module requires 500 msec or one module Invalid 11 update to flag the error while it ramps the channel input Units Degrees C 0 Select C F for thermal inputs Ignored for mV inputs 8 OF oC Important For EU x1 and F 0 1 F an over range error Degrees F 1 will occur above 3276 7 F cannot exceed 32767 counts 9 10 Unused Unused 0 0 These bits must be zero for a valid configuration Disable unused channels for faster response Channel Off 0 When set the module configures the channel and reads the ae channel input before setting bit 11 in the status word Chnl If you change the configuration word the status word must 11 Enabl reflect the change before new data is valid If you clear
9. F Allen Bradley Thermocouple mV solated Input User Module Manual Cat No 1746 INT4 Series B Important User Information Solid state equipment has operational characteristics differing from those of electromechanical equipment Safety Guidelines for the Application Installation and Maintenance of Solid State Controls Publication SGI 1 1 describes some important differences between solid state equipment and hard wired electromechanical devices Because of this difference and also because of the wide variety of uses for solid state equipment all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable In no event will the Allen Bradley Company be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment The examples and diagrams in this manual are included solely for illustrative purposes Because of the many variables and requirements associated with any particular installation the Allen Bradley Company cannot assume responsibility or liability for actual use based on the examples and diagrams No patent liability is assumed by Allen Bradley Company with respect to use of information circuits equipment or software described in this manual Reproduction of the contents of this manual in whole or in part without written permission of the Allen Bradley Company
10. Downscale to force channel data word to low scale 2 Important A bit selection or 1 1 is invalid Mode Downscale 1 0 For an open CJ C thermistor mV channels are not affected invalid i Important The module requires 500 msec or one module wg 04 update to flag the error while it ramps the channel input Units Degrees C 0 Select C F for thermal inputs Ignored for mV inputs 8 OF oC Important For EU x1 and F 0 1 F an over range error Degrees F 1 al will occur above 3276 7 F cannot exceed 32767 counts 9 10 Unused Unused 0 0 These bits must be zero for a valid configuration Disable unused channels for faster response Channel Off 0 When set the module configures the channel and reads the anne channel input before setting bit 11 in the status word Chnl If you change the configuration word the status word must 11 Enable reflect the change before new data is valid If you clear the configuration word the module clears channel and status Channel On 1 words Fora new configuration word channel data and status words remain cleared until the module sets this bit en LI 11 in the status word 12 15 Unused Unused 0000 These bits must be zero for a valid configuration Enter Your Bit Selections gt gt 0000 Selected Configuration Word 6 2 Publication 1746 6 16 January 1999 Chapter 6 Channel Configuration Data and Status Selecting the Correct Data Format U
11. 1 0 1 Reflects the type of channel input TC Type B 0 1 1 0 Input TC TypeN 0 1 1 1 O3 Type 50mV 1 0 ofo 100mV 1 0 0 1 TC Type C 1 0 1 0 TC Type D 1 0 1 1 Invalid 1 1 0 0 rhe module faults when it Invalid 1 1 0 1 detects an invalid configuration Invalid 1 1 1 0 CJ C Temp TNT P n Engr Units x1 0 0 T Data Engr Units x10 0 1 Reflects the type of data format Format Scaled for PID 1 0 Counts 1 1 Zero 0 0 Reflects module response to a detected Open Upscale 0 1 open input circuit for all input types 6 7 Input D 1 including CJ C thermistor Mode OWNS cag The module faults when it detects an Invalid 1 41 invalid configuration Units Degrees C 0 8 OF oC Reflects temperature units Degrees F 1 9 10 Unused Unused 0 Faults when it detects a non zero value Reflects enabled disabled channel status Chnl Channel Off 0 Status word of a disabled channel is zero 11 Enable Channel data and status words remain Channel On 1 cleared until the module sets this bit in response to a new configuration word Open 0 Condition not detected bc Input Diagnostics 1 Detected open input Under l 0 Condition not detected 13 Range Diagnostics 1 Detected under range input Over 0 Condition not detected B Range Diagnostics 1 Detected over range input Invalid 0 Condition not detected 1 Config Diagnostics 1 Detected invalid configuration Publication 1746 6 16 January 1999 6
12. 32767 2 Type B C and D thermocouples cannot be represented in engineering units x 1 F above 3276 7 F Software treats itas an over range error When millivolts are selected the temperature setting is ignored Analog input data is the same for either C or F selection Resolution of a Channel Data Word Data Format InputType Engineering Units x 10 Engineering Units x 1 Scaled for PID Proportional Counts Celsius Fahrenheit Celsius Fahrenheit Celsius Fahrenheit Celsius Fahrenheit C 1 C step 1 F step 0 1 C step 0 1 F step 0 1414 C step 0 2564 C step 0 0353 C step 0 0641 C step D 1 C step 1 F step 0 1 C step 0 19F step 0 1414 C step 0 2564 C step 0 0353 C step 0 0641 C step J 1 C step 1 F step 0 1 C step 0 1 F step 0 0592 C step 0 1066 F step 0 0148 C step 0 0266 F step K 1 C step 1 F step 0 1 C step 0 1 F step 0 1001 C step 0 1802 F step 0 0250 C step 0 0450 F step T 1 C step 1 F step 0 1 C step 0 1 F step 0 0409 C step 0 0736 F step 0 0102 C step 0 0184 F step E 1 C step 1 F step 0 1 C step 0 1 F step 0 0775 C step 0 1395 F step 0 0194 C step 0 0349 F step R 1 C step 1 F step 0 1 C step 0 1 F step 0 1079 C step 0 1942 F step 0 0270 C step 0 0486 F step S 1 C step 1 F step 0 1 C step 0 1 F step 0 1079 C step 0 1942 F
13. 4 3 2 es LI ILI T T eon 7 T T T TT 1 1 1 11 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 6 4 Publication 1746 6 16 January 1999 Format of a Channel Data Word Chapter 6 Channel Configuration Data and Status Data Format Input Type Engineering Units x 10 Engineering Units x 1 i Rd 2 T Fahrenheit 9 TUR i Fahrenheit Scaled for PID ied 0 to 2317 32 to 4201 0 to 23170 320 to 32767 0to16383 32768to 432767 D 0 to 2317 32 to 4201 0 to 23170 320 to 32767 0to 16383 32768 to 432767 J 210 to 760 346 to 1400 2100 to 7600 3460 to 14000 0 to 16383 32768 to 32767 K 270 to 1370 454 to 2498 2700 to 13700 4540 to 24980 0 to 16383 32768 to 32767 T 270 to 400 454 to 752 2700 to 4000 4540 to 7520 0 to 16383 32768 to 32767 E 270 to 1000 454 to 1832 2700 to 10000 4540 to 18320 0 to 16383 32768 to 32767 R 0 to 1768 32 to 3214 0 to 17680 320 to 32140 0 to 16383 32768 to 32767 S 0 to 1768 32 to 3214 0 to 17680 320 to 32140 0 to 16383 32768 to 32767 B 300 to 1820 572 to 3308 3000 to 18200 5720 to 32767 0 to 16383 32768 to 32767 N 0 to 1300 32 to 2372 0 to 13000 320 to 23720 0 to 16383 32768 to 32767 50 mV 50 to 509 50 to 509 500 to 5009 500 to 5009 0 to 16383 32768 to 32767 100 mV 1000 to 1000 1000 to 1000 10000 to 10000 10000 to 100007 0 to 16383 32768 to 32767 CJC Sensor 0 to 85 32 to 185 0 to 850 32 to 1850 0 to 16383 32768 to
14. 7 Chapter 6 Channel Configuration Data and Status 6 8 Detected Faults Indicated by Bits 12 15 When the module detects any of the conditions described for bits 12 15 it sets the corresponding bit blinks the status LED on the front panel for the channel having the fault The module is designed to detect the following fault conditions Open circuit Detection Bit 12 The module tests all enabled channels for an open circuit condition each time it scans its inputs Possible causes of an open circuit include broken thermocouple or CJC thermistor thermocouple or CJC thermistor wire cut or disconnected Out Of Range Detection Bit 13 for under range bit 14 for over range The module tests all enabled channels for an out of range condition each time it scans its inputs Possible causes of an out of range condition include the temperature is too hot or too cold for the thermocouple being used atype B C or D thermocouple may be registering a F value in EU x1 beyond the range allowed by the SLC processor beyond 32 767 for the data word e a CJC thermistor may be damaged or the temperature within the cabinet containing the module may be outside the CJC thermistor range limits Invalid Channel Configuration Bit 15 The module sets this fault bit when it detects the following invalid configurations e configuration bits 0 3 invalid inputtypez1100 0r1101 or1110 e configuration bits 6 7 invalid code for open
15. CT Configure the channel for the input type connected to it C Type N 0 1 1 1 Input Valid inputs are thermocouples and analog input signals 0 3 Type 50mV 1 0 0 0 of t50mV and 100mV You can configure the channel to 100mV 1 01 0117 read the cold junction CJ C temperature When reading the CJ C temperature the channel ignores the physical TC Type C 1 0 1 0 input signal TC Type D 1 0 1 1 Invalid 1 1 0 0 Invalid WAT 01 Invalid 1 1 1 0 CJ C Temp 1 1 1 1 i Select the channel data format from Engr PIE 1 Jk Engineering units EU x1 or x10 For EU x1 values are in 0 1 degrees or 0 01mV Data Engr Units x10 0 1 For EU x10 values are in whole C or F or 0 1mV 4 5 Format Scaled for PID value is the same for any input type Scaled for PID 1 0 Proportional input signal range is scaled to 0 16 383 counts Proportional counts value is same for any input type Counts 11 Proportional input signal range is scaled to 32 767 counts ZA For more information refer to chapter 6 Zero 0 0 Select module response to a detected open circuit from Zero to force the channel data word to zero Upscale to force the channel data word to full scale T Eae Upscale Jie Downscale to force channel data word to low scale irs D ilo Important A bit selection or 1 1 is invalid ode Ownscgie For an open CJ C thermistor mV channels are not affected Important The module requires 500 msec or one module Invalid 1 1 update to fl
16. Define To Select Set these bits in the Channel Configuration Word Description 15 12 11 10 9 8 7 6 5 4 3 2 1 0 TC Type J 0 0 0 0 TC Type K oooiPoet TC Type T o 0 1 0 Slot Number ____ TC Type E 0 0 1 1 Channel Number TC Type R 011 010 TC Type S 0 1 0 1 TC Type B 0 1 1 0 TC Type N 0111 Configure the channel for the input type connected to it E Input Valid inputs are thermocouples and analog input signals 0 3 Type 50mV 1 0 0 0 of t50mV and 100mV You can configure the channel to 100mV 1 0 0 1 read the cold junction CJ C temperature When reading the CJ C temperature the channel ignores the physical TC Type C 1 0 1 0 input signal TC Type D 1 0 1 1 Invalid 1 1 0 0 Invalid 1 1 0 1 Invalid 1 11 0 CJC Temp 1 1 1 1 i Select the channel data format from SB d Engineering units EU x1 or x10 For EU x1 values are in 0 1 degrees or 0 01mV Data Engr Units x10 0 1 For EU x10 values are in whole C or F or 0 1mV 4 5 Format Scaled for PID value is the same for any input type Scaled for P ID 1 0 Proportional input signal range is scaled to 0 16 383 counts Proportional counts value is same for any input type Counts t Proportional input signal range is scaled to 32 767 counts NENNEN NN For more information refer to chapter 6 Zero 0 0 Select module response to a detected open circuit from Zero to force the channel data word to zero Upscale to force the channel data word to f
17. Downscale or zero Time to Detect Open Circuit 5 seconds typical Input Step Response 0 to 99 9 in 600 ms worst case See Input Resolution Graphs on following pages They show the smallest 20 nA typical Input Resolution measurable value based on combined hardware and software tolerances Display Resolution See Channel Data Word Resolution table on page 6 5 Overall Module Accuracy _ 25 C 77 F See Module Accuracy Table page A 3 Overall Module Accuracy 0 C to 60 C 32 F to 140 F See Module Accuracy Table page A 3 Overall Module Drift See Module Accuracy Table page A 3 Module Update Time Less than 500 ms Channel Turn Off Time Up to one module update time A 2 Publication 1746 6 16 January 1999 Appendix A Specifications Overall Accuracy We define overall accuracy to include variances in cold junction compensation calibration non linearity and resolution Input Type ae A Au Ener md E eu J 1 60 C 2 88 F 0 042 C C F F K 3 80 C 6 84 F 0 096 C C F F T 2 05 C 3 69 F 0 025 C C F F E 2 40 C 4 32 F 0 058 C C F F S 12 38 C 4 29 F 0 131 G C F F R 2 23 C 4 02 F 0 130 C C F F B 3 83 C 6 90 F 0 109 C C F F N 1 79 C 3 23 F 0 080 C C F F C 2 28 C 4 11 F 0 270 C C F F D 2 52 C 4 54 F 0 280 C C F F 50
18. January 1999 Appendix Thermocouple Descriptions The descriptions of thermocouples J K T E R and S were extracted from NBS Monograph 125 IPTS 68 issued March 1974 We also describe types C and D Iron vs Copper Nickel lt Constantan gt The J thermocouple is the least suitable for accurate thermometry because there are significant nonlinear deviations in the thermoelectric output from different manufacturers The total and specific types of impurities that occur in commercial iron change with time location of primary ores and methods of smelting Type J thermocouples are recommended by the ASTM 1970 for use in the temperature range from 0 to 760C in vacuum oxidizing reducing or inert atmospheres If used for extended times above 500C heavy gauge wires are recommended because the oxidation rate is rapid at elevated temperatures They should not be used in sulfurous atmospheres above 500C Because of potential rusting and embrittlement they are not recommended for subzero temperatures They should not be cycled above 760C even for a short time if accurate reading below 760C are desired at a later time The negative thermoelement a copper nickel alloy is subject to substantial composition changes under thermal neutron irradiation since copper is converted to nickel and zinc Commercial iron undergoes a magnetic transformation near 769C and an alpha gamma crystal transformation near 910C
19. Troubleshooting LED Indicators The module has five LEDs four channel status LEDs numbered to correspond with each channel one module status LED INPUT ISOLATED 0 2 CHANNEL J E LEDs for Channels 0 3 MODULE STATUS lt lt LED for Module Status THERMOCOUPLE mV LED Troubleshooting Tables Module status LED If Module Status LED is Then Take This Corrective Action On The module is OK No action required Off The module is turned off Cycle power If the condition persists call your local or it detected a module fault distributor or Allen Bradley customer service for assistance Module status and Channel status LEDs If Module And Channel Status LED is Status LED is Then Take This Corrective Action On The channel is enabled No action required Examine error bits in the status word if bit 12 2 1 the input has an open circuit if bit 13 2 1 the input value is under range if bit 14 2 1 the input value is over range if bit 15 2 1 the configuration is invalid The module detected open circuit condition On Blinking under range condition over range condition channel configuration error off The module is in power up or the channel is disabled No action required 8 2 Publication 1746 6 16 January 1999 Publication 1746 6 16 January 1999 Chapter 8 Module Diagnostics and Troubleshooting Chan
20. circuit mode 1 1 configuration bits 9 10 and 12 15 invalid non zero bit setting Publication 1746 6 16 January 1999 Processor Basics Publication 1746 6 16 January 1999 Chapter Ladder Programming Examples Earlier chapters explained how configuration words define channel operation This chapter shows examples of ladder logic that you write to load configurations into the output image file to be scanned to the module change the configuration of a channel verify that the change in configuration occurred process a channel input value with a PID instruction monitor channel status We start with some basic concepts of the SLC processor For the examples in this chapter we have assigned the module to slot 3 and have addressed ladder logic files in the SLC processor as follows configurations are stored in words 0 3 of integer file N10 configurations are scanned to the module from output image words 0 3 0 0 3 3 channel data words and channel status words are scanned from the module into input image words I 3 0 I 3 3 and 1 3 4 1 3 7 respectively During the program scan the SLC processor follows the ladder logic instructions that you create to perform such functions as copy or move configurations from integer file N10 to the output image file to be scanned to the module during the next I O scan verify a change in configuration by comparing the channel status word with the channel configuration
21. editions are marked with change bars as shown to the right of this paragraph to indicate the addition of new or revised information Publication 1746 6 16 January 1999 SOC 1 Summary of Changes SOC 2 Publication 1746 6 16 January 1999 Who Should Use this Manual Purpose and Contents of this Manual Publication 1746 6 16 January 1999 Preface Preface Read this preface to familiarize yourself with the manual This preface covers the following topics who should use this manual purpose and contents of this manual format conventions used in this manual terms and abbreviations Allen Bradley support Use this manual if you are responsible for the design installation programming or maintenance of an automation control system that uses Allen Bradley small logic controllers You should have a basic understanding of SLC 500 products You should understand electronic process control and be able to interpret the ladder logic instructions required to control your application If you do not contact your local Allen Bradley representative for training before using this product This manual is a learning and reference guide for the 1746 INT4 Thermocouple mV Isolated Input Module It contains the information you need to program install wire and troubleshoot the module Preface Format Conventions Contents of this Manual Chapter Title Content Descr
22. for the data word Your selection determines how the analog input from the A D converter will be expressed in the data word Enter your 2 digit binary code in bit field 4 5 3 Determine the desired change to the channel data word when the module detects an open input circuit Enter the 2 digit binary code in bit field 6 7 4 If the channel is configured for thermocouple inputs determine if you want channel data in degrees Fahrenheit or Celsius and set bit 8 accordingly Important If the channel is configured for a mV analog sensor zero bit 8 Enable the channel by setting bit 11 Default disables the channel Ensure that bits 9 10 and 12 15 are zero Repeat steps 1 6 for each channel used on A Un After entering your ladder logic to transfer data to the module switch the SLC controller to run mode to download channel configurations Using Channel Data Words Thermocouple or millivolt input data reside in I e 0 I e 3 of the SLC controller s input image file where e is the slot number assigned to the module The values depend on the input type and data format that you select When an input channel is disabled its data word is reset 0 SLC Coniroller s Input Image File Data Word e CLI T TI D omm T T T T 15 14 13 12 11 1 0 1 10 9 8 7 6 5 4 3 2 ex amana 13 12 11 7 0 15 14 10 9 8 1 6 5 4 3 2 amp e2 Hzomaomwe T 5 14 13 12 11 7 0 1 10 9 8 7 6 5
23. is inserted into slot 1 N S amp OON WS WAL We WH We WY A NS Wi N ANN TN AN iN ec D ON Top and Bottom Module Release s 2 2 Publication 1746 6 16 January 1999 Chapter 2 Quick Start Pe Connect a Thermocouple Reference Connect thermocouple wires to channel 0 on the module s terminal block Make sure both cold Chapter 3 junction compensation CJ C devices are securely attached Installation and Wiring Terminal Block CICA Device Important Ground the thermocouple s cable shield to the I O chassis with 3 8 braid wire Refer to Figure 3 2 Thermocouple Wire e Configure the Software to Accept the Module Reference Chapter 4 Preliminary Enter the module s ID and assigned slot slot 1 in this example into the system I O configuration Operating Considerations If using APS software select Other at the bottom of the list of modules and enter the module ID code 3515 at the prompt on the I O configuration display No manual entry of special I O configura tion SPIO CONFIG information is required as the module ID code automatically assigns the number of input and output words required by the module Additional information on using Advanced Programming Software APS to configure your system can be found in The Getting Started Guide for APS publication 9399 APSQS Example of Software Prompt Press ENTER to select I O Module Enter Module ID Code g
24. is prohibited Throughout this manual we use notes to make you aware of safety considerations ATTENTION Identifies information about practices or circumstances that can lead to personal injury or death property damage or economic loss Attentions help you e identify a hazard avoid the hazard recognize the consequences Important Identifies information that is especially important for successful application and understanding of the product SLC SLC 500 and SLC 5 02 are trademarks of Allen Bradley Company Inc Summary of Changes Summary of Changes This publication contains new and revised information not included in the previous version New Information The Thermocouple mV Isolated Input module cat no 1746 INT4 is now a series B module The series B module is identical to the series A module with the exception that the series B module is CE certified and has CSA hazardous location approval refer to Appendix A for complete ratings Compliance with European Union Directives This series B module complies with the directives outlined in Chapter 1 of this document CSA Hazardous Location Approval This series B module complies with CSA classifications as outlined under Specifications in Appendix A Revised Information This publication also contains information formally included in a document update publication 1746 6 16 DUI1 Change Bars The areas in this manual which are different from previous
25. permanent damage Handle the module as stated below Touch a grounded object to rid yourself of charge before handling the module Wear an approved wrist strap when handling the module Handle the module from the front away from the backplane connector Do not touch backplane connector pins Keep the module in its static shield bag when not in use Power Requirements The module receives its power through the SLC500 chassis backplane from the fixed or modular 5 V dc 24 V dc chassis power supply The maximum current drawn by the module is shown in the table below 5V dc Amps 24Vdc Amps 0 11 0 085 When using the module in a modular system add the values shown above to the requirements of all other modules in the SLC chassis to prevent overloading the chassis power supply When using the module in a fixed controller be sure not to exceed the power supply rating for the pair of modules in the 2 slot I O chassis Publication 1746 6 16 January 1999 3 1 Chapter 3 Installation and Wiring Fixed Controller Compatibility Table Module INT4 vdc 24V de AMPS AMPS IA4 yes 0 035 lA8 yes 0 050 x lA16 yes 0 085 IM4 yes 0 035 IM8 yes 0 050 IM16 yes 0 085 OA8 yes 0 185 OA16 yes 0 370 IB8 yes 0 050 IB16 yes 0 085 gt IV8 yes 0
26. rating 4 Observe the intersection If within the chart boundary the pair is OK 450 455 0 Module 5V dc 24V dc TAB 0 185 0 400 INT4 0 110 0 085 Total 0 295 0 085 350 30 7 295 5V dc Current mA 250 255 180 200 150 100 50 0 180 50 100 150 200 24V dc Current mA Important Some analog I O modules such as the FIO4I FIO4V NO4I and NO4V may require an additional 24V dc power supply For those modules as needed refer to the user manual Publication 1746 6 16 January 1999 Module Installation and Removal Publication 1746 6 16 January 1999 Chapter 3 Installation and Wiring When installing the module in a chassis it is not necessary to remove the terminal block from the module However if the terminal block is removed use the write on label located on the side of the terminal block to identify the module location and type SLOT _ RACK MODULE Terminal Block Removal ATTENTION Never install remove or wire modules with power applied to the chassis or devices wired to the module To remove the terminal block 1 Loosen the two terminal block release screws To avoid cracking the terminal block alternate between screws as you remove them Grasp the terminal block at the top and bottom and pull outward and down When removing or installing the terminal block be careful not to damage the CJC sensors
27. terminal block In this example we monitor the channel enable bit bit 11 and the open input bit bit 12 in channel status words 1 3 4 1 3 7 and use output image bits O 2 0 0 3 as alarm bits Important If a CJC thermistor is not installed or is damaged all four alarms are set and all four channel LEDs blink Program First Pass Bit Initialize NT4 1 COP COPY FILE 15 Source N10 0 Dest 0 3 0 Length 4 Channel 0 Channel 0 Channel 0 Status Open Alarm I 3 4 I 3 4 0 2 0 E 11 12 0 Channel 1 Channel 1 Channel 1 Status Open Alarm I 3 5 I 3 5 0 2 0 t dt E 11 12 1 Channel 2 Channel 2 Channel 2 Status Open Alarm I 3 6 I 3 6 0 2 0 t E 11 12 2 Channel 3 Channel 3 Channel 3 Status Open Alarm I 3 7 I 3 7 0 2 0 t lE 11 12 3 END Data Table 15 data 0 address 15 data 0 0000 1001 0001 0001 N10 3 0000 1001 0001 0001 0000 1001 0001 0001 0000 1001 0001 0001 Publication 1746 6 16 January 1999 Module and Channel Diagnostics Publication 1746 6 16 January 1999 Chapter Module Diagnostics and Troubleshooting This chapter describes troubleshooting with channel status and module status LEDs It explains the types of conditions that might cause the module to flag an error and suggests what corrective action you could take Topics include module and channel diagnostics LED indicators troubleshooting flowchart
28. the nable configuration word the module clears channel and status Channel On 1 words Fora new configuration word channel data and status words remain cleared until the module sets this bit 11 in the status word 12 15 Unused Unused 0000 These bits must be zero for a valid configuration Enter Your Bit Selections gt gt 0000 For the Channel Configuration Word Publication 1746 6 16 January 1999 B 1 Appendix B Channel Configuration Worksheets Select your bit configurations Write them down at the bottom of the worksheet Use one worksheet for each channel Channel Configuration Word 0 e 0 through O e 3 Bit Descriptions h its in the Ch l fi ion W Bit s Define To Select Set these bits in the Channel Configuration Word Description 15 12 11 10 9 8 7 6 5 4 3 2 1 0 TC Type J 0 0 0 0 TC Type K oooiPoet TC Type T o 0 1 0 Slot Number ____ TC Type E 0 0 1 1 Channel Number TC Type R 011 010 TC Type S 0 1 0 1 TC Type B 0 1 1 0 TC Type N 0111 Configure the channel for the input type connected to it E Input Valid inputs are thermocouples and analog input signals 0 3 Type 50mV 1 0 0 0 of t50mV and 100mV You can configure the channel to 100mV 1 0 0 1 read the cold junction CJ C temperature When reading the CJ C temperature the chan
29. to BCD and send them to the LED displays Publication 1746 6 16 January 1999 9 5 Application Programming Examples Program The first six rungs change channel configurations based on the position of the two selector switches Rung 2 0 If the degrees selector switch is switched to Fahrenheit configure all four channels to read in degrees Fahrenheit The default for channel 0 is to read the ambient temperature thermocouple Degrees Selector Switch Fahrenheit Configure Channels I 2 0 B3 COP 1 E OSR COPY FILE 0 0 Source N10 0 Dest 0 1 0 Length 4 Rung 2 1 If the ambient cabinet selector switch is switched to ambient and the degrees selector switch is switched to Fahrenheit configure channel 0 to read the ambient temperature thermocouple in degrees Fahrenheit Degrees Ambient Cabinet Selector Switch Selector Switch Fahrenheit Ambient Configure Channels 1 2 0 1 2 0 B3 MOV t 1E OSR MOVE 0 1 1 Source N10 0 Dest 0 1 0 Rung 2 2 If the ambient cabinet selector switch is switched to cabinet and the degrees selector switch is switched to Farenheit configure channel 0 to read the CJ C sensor in degrees Fahrenheit Degrees Ambient Cabinet Selector Switch Selector Switch Fahrenheit Ambient Configure Channels 1 2 0 I 2 0 B3 MOV t L oSR MOVE 0 1 2 Source N10 8 Dest 0 1 0 Rung 2 3 If the degrees selector switch is switched to Celsius conf
30. 0 indicates the following restrictions on the use of S and R type thermocouples at high temperatures They should not be used in reducing atmospheres nor in those containing metallic vapor such as lead or zinc nonmetallic vapors such as arsenic phosphorous or sulfur or easily reduced oxides unless suitable protected with nonmetallic protecting tubes They should never be inserted directly into a metallic primary tube The positive thermoelement platinum 10 rhodium 13 rhodium for R is unstable in a thermal neutron flux because the rhodium converts to palladium The negative thermoelement pure platinum is relatively stable to neutron transmutation However fast neutron bombardment will cause physical damage which will change the thermoelectric voltage unless it is annealed out The thermoelectric voltages of platinum based thermocouples are sensitive to their heat treatments In particular quenching from high temperatures should be avoided ASTM Standard E230 72 in the Annual Book of ASTM Standards 1972 specifies that the standard limits of error for Type S and R commercial thermocouples be 1 4C between 0 and 538C and 1 4 percent between 538 and 1482C Limits of error are not specified for Type S or R thermocouples below 0C The recommended upper temperature limit for continuous use of protected thermocouples 1482C applies to AWG 24 0 5mm wire Publication 1746 6 16 January 1999 C 5 A
31. 050 IV16 yes 0 085 IG16 yes 0 140 OV8 yes 0 135 0V16 yes 0 270 OB8 yes 0 135 0G16 yes 0 180 ow4 yes 0 045 0 045 ows yes 0 085 0 090 OW16 0 170 0 180 104 yes 0 030 0 025 108 yes 0 060 0 045 1012 yes 0 090 0 070 NI4 yes 0 025 0 085 NIO4I 0 055 0 145 NIO4V 0 055 0 115 DCM 0 360 HS yes 0 300 OB16 yes 0 280 IN16 yes 0 085 INT4 yes 0 110 0 085 BAS yes 0 150 0 040 0B32 0 452 0V32 0 452 1V32 yes 0 106 IB32 yes 0 106 0X8 yes 0 085 0 090 NO4I 0 055 0 195 NO4V 0 055 0 145 ITB16 yes 0 085 ITV16 yes 0 085 KE yes 0 150 0 040 KEn 0 150 0 145 OBP16 yes 0 250 NT4 yes 0 060 0 040 FIO4I 0 055 0 150 FIO4V 0 055 0 120 Considerations for a Modular System Place your module in any slot of an SLC500 modular or modular expansion chassis except for the left most slot slot 0 reserved for the SLC processor or adapter modules Considerations for a Fixed Controller The power supply in the 2 slot SLC 500 fixed I O chassis 1746 A2 can support only specific combinations of modules Refer to the table at the left or to the Chart Method below to determine whether the power supply can support the pair of modules Chart Method Use the chart to determine a valid pair of modules as follows 1 For both modules add the current rating at 5V dc and again at 24V dc 2 On the chart draw a horizontal line for the total 5V dc current rating 3 On the chart draw a vertical line for the total 24V dc current
32. 42 B h B B B upscale snab 246 Sj 8 3 9 3 3 zero 2 b s B B B B B 4 error condition 6 B 8 p out of range error 6 8 8 3 output image 4 output response to slot disabling 4 5 P physical specifications A roo CEE Al PID instruction 7 5 power requirements 3 power up sequence 1 4 programming 7 alarms 7 6 application examples 9 ilis ad settings making changes 7 8 PID instructior 7 m channel configuration changes proportional counts input 244 e b 8 1 e e b e 3 R remote configuration D removable terminal block 1 8 removing the module 3 B resolution 4 4 D p Publication 1746 6 16 January 1999 Publication 1746 6 16 January 1999 S sampling time D scalp for PIL E FE scaling input data D self locking tabs 1 B slot disabling 4 5 specifications A electrical A environmental A p input A 2 physical Index I 3 start up instructions 2 Status word 644 6 6 D See also input image step response D system operation 1 4 T temperature units couple IG DL pe B thermocouple 246 6 2 B EE E terminal wiring 3 cold junction compensation 3 b OA Rockwell Automation Allen Bradley a Rockwell Automation Business has been helping its customers improve productivity and quality for more than 90 years We design manufacture and support a broad Allen Bradley range of automation p
33. 6 16 January 1999 Terms and Abbreviations Publication 1746 6 16 January 1999 Appendix Terms and Abbreviations The following terms and abbreviations are used throughout this manual For definitions of terms not listed here refer to Allen Bradley s Industrial Automation Glossary Publication AG 7 1 A D Refers to the analog to digital converter within the module The converter produces a digital value whose magnitude is proportional to the instantaneous magnitude of an analog input signal attenuation The reduction in the magnitude of a signal as it passes through a system The opposite of gain channel Refers to one of four small signal analog input interfaces to the module s terminal block Each channel is configured for connection to a thermocouple or DC millivolt mV input device and has its own configuration and status words chassis A hardware assembly that houses devices such as I O modules adapter modules processor modules and power supplies CJC Cold Junction Compensation The means by which the module compensates for the offset voltage error introduced by the temperature at the junction between the thermocouple lead wire and the input terminal block the cold junction common mode rejection ratio The ratio of a device s differential voltage gain to common mode voltage gain Expressed in dB CMRR is a comparative measure of a device s ability to reject interference caused by a
34. 746 6 16 January 1999 Chapter 4 Preliminary Operating Considerations Response to Slot Disabling y writing to the status file in your modular SLC processor you can disable any chassis slot Refer to your SLC programming manual for the slot disable enable procedure ATTENTION Always understand the implications of disabling the module before using the slot disable feature Input Response When the slot for this module is disabled the module continues to update its inputs However the SLC processor does not read from a module whose slot is disabled Therefore inputs appearing in the processor image table remain in their last state and the module s updated inputs are not read When the processor re enables the module slot the current state of module inputs are read by the controller during the subsequent scan Output Response When the slot for this module is disabled configuration words in the SLC processor s output image table are held in their last state and not transferred to the module When the slot is re enabled output image table words are transferred to the module during the subsequent scan Publication 1746 6 16 January 1999 4 7 Chapter 4 Preliminary Operating Considerations Notes 4 8 Publication 1746 6 16 January 1999 Create a New File Publication 1746 6 16 January 1999 Chapter Accessing Files to Configure I O This chapter shows how to apply Advanced Programming Softwa
35. Both of these transformation especially the latter seriously affect the thermoelectric properties of iron and therefore the Type J thermocouples If Type J thermocouples are taken to high temperatures especially above 900C they will lose accuracy of their calibration when they are recycled to lower temperatures ASTM Standard E230 72 in the Annual Book of ASTM Standards 1972 specifies that the standard limits of error for Type J commercial thermocouples be 2 2C between 0 and 277C and 3 4 percent between 277 and 760C Limits of error are not specified for Type J thermocouples below OC or above 760C Type J thermocouples can also be supplied to meet special limits of error which are equal to one half the limits given above The recommended upper temperature limit for protected thermocouples 760C applies to AWG 8 3 3mm wire For smaller wires the recommended upper temperature decreases to 593C for AWG 14 1 6mm and 371C for AWG 24 or 28 0 5 or 0 3mm itshould be noted that the Constantan element of Type J thermoelements is NOT interchangeable with the Constantan element of Types T or N due to the different ration of copper and nickel in each C 1 Appendix C Thermocouple Descriptions K Type Thermocouple C 2 Nickel Chromium vs Nickel Aluminum This type is more resistant to oxidation at elevated temperatures than the Types E J or T thermocouples and consequently it finds wide application at tempera
36. C Backplane Power Consumption 0 6W maximum 0 55W 5 VDC 2W 24 VDC Number of Channels 4 backplane and channel to channel isolated I O Chassis Location Any I O module slot except slot 0 A D Conversion Method Sigma Delta Modulation nput Filtering Analog filter with low pass digital filter Normal Mode Rejection between input and input Greater than 50 dB at50 Hz Greater than 60 dB at 60 Hz Common Mode Rejection between inputs and chassis ground Greater than 120 dB at 50 60 Hz with 1K ohm imbalance Channel Bandwidth 3db 8 Hz Calibration once yearly if required Isolation 1000 V transient or 150 VAC continuous channel to channel or channel to backplane LED Indicators 5 green status indicators one for each of 4 channels and one for module status Module ID Code 3515 Recommended Cable for thermocouple inputs for mV inputs Shielded twisted pair thermocouple extension wire Alpha 5121 or equivalent Maximum Wire Size Two 14 AWG wires per terminal Maximum Cable Impedance 150 ohms maximum loop impedance for 1LSB error Terminal Strip Removable Allen Bradley spare part Catalog Number 1746 RT32 Referto the thermocouple manufacturer for the correct extension wire A 1 Appendix A Specifications Environmental Specifications Operating Temperature 0 C
37. E A equipment Association of Boston MA A complete listing of current Allen Bradley documentation including ordering instructions Also indicates whether the Allen Bradley Publication Index SD499 documents are available on CD ROM or in multi languages A glossary of industrial automation terms and abbreviations Allen Bradley Industrial Automation Glossary AG 7 1 P 3 Publication 1746 6 16 January 1999 Preface Allen Bradley Support Services P 4 Allen Bradley offers support services worldwide with over 75 Sales Support offices 512 authorized Distributors and 260 authorized Systems Integrators located throughout the United States alone plus Allen Bradley representatives in every major country in the world Local Product Support Contact your local Allen Bradley representative for sales and order support product technical training warranty support support service agreements Technical Product Assistance If you need to contact Allen Bradley for technical assistance please review the information in the Module Diagnostics and Troubleshooting chapter first Then call your local Allen Bradley representative Publication 1746 6 16 January 1999 Module Overview Quick Start Installation and Wiring Preliminary Operating Considerations Publication 1746 6 16 January 1999 Table of Contents Chapter 1 General Description INDUUR ANCES 3 c ces esr eed a a a a aan
38. For example a 12 bit value has 4 096 possible counts It can therefore be used to measure part in 4096 sampling time The time for an A D converter to sample an input channel status word Contains status information about the channel s current configuration and operational state You can use this information in your ladder program to determine whether the channel data word is valid step response time This is the time required for the module to process an input signal to reach 99 9 of its expected final value given a large step change in the input signal update time The time for the module to sample and convert a channel input signal and make the resulting value available to the SLC processor Publication 1746 6 16 January 1999 Appendix CSA Hazardous Location Approval CSA Hazardous Location Approval CSA certifies products for general use as well as for use in hazardous locations Actual CSA certification is indicated by the product label as shown below and not by statements in any user documentation Example of the CSA certification product label CL DIV 2 GP A B C D Q TEMP To comply with CSA certification for use in hazardous locations the following information becomes a part of the product literature for CS A certified Allen Bradley industrial control products e This equipmentis suitable for use in Class Division 2 Groups A B C D or non hazardous locations only e The p
39. LC processor s input image table are reserved for the module Input image words 0 3 data words hold the the temperature values of thermocouple analog inputs for channels 0 3 The data is valid only when the channel is enabled no errors are detected and not during calibration Input words 4 7 status words contain the status of channels 0 3 Status bits for a particular channel reflect the configuration settings that you entered into the configuration output image word for that channel To receive valid status the channel must be enabled and the module must have stored a valid configuration word for that channel During calibration these words return calibration status Each input image word has a unique address based on the slot number assigned to the module Example Address To obtain the status of channel 2 input word 6 of the module located in slot 4 in the SLC chassis use address I 4 6 File X Word 1 4 6 Element Word Delimiter Delimiter Chapter 6 Channel Configuration Data and Status gives you detailed bit information about the content of the data word and the status word Input Channel Characteristics Each channel has an 8 Hz digital filter for input noise rejection a multiplexer for processing cold junction compensation CJC values and an analog to digital A D converter to provide digital values for SLC processing Channel Cut off Frequency Update Time and Step Response The channel cut off freque
40. V analog sensors Input Ranges The following tables define thermocouple types and associated temperature ranges and the millivolt analog input signal ranges that each of the module s input channel will support To determine the practical temperature range of your thermocouple refer to the specifications in appendix A Thermocouple Temperature Ranges Type C Temperature Range F Temperature Range C 0C to 23170C 320F to 42010F D 00C to 2317 C 320F to 42010F J 210 C to 760 C 346 F to 14009F K 270 C to 1370 C 454 F to 2498 F T 270 C to 400 C 454 F to 7529F B 300 C to 1820 C 572 F to 3308 F E 270 C to 1000 C 454 F to 1832 F R 0 C to 1768 C 32 F to 3214 F S 0 C to 1768 C 32 F to 3214 F N 0 C to 1300 C 32 F to 2372 F CJC Sensor 0 C to 85 C 32 F to 185 F Millivolt Input Ranges 50 to 50 mV 100 to 100 mV Each input channel is individually configurable for a specific input device and provides open circuit over range and under range detection and indication 1 2 Publication 1746 6 16 January 1999 Chapter 1 Module Overview Hardware Features The module fits into any single slot for I O modules in either an SLC 500 modular system or an SLC 500 fixed system expansion chassis 1746 A2 It is a Class 1 module uses 8 input words and 8 output words Requires use of Block Transfer in a remote configuration The module
41. a Hardware Features ar 0 af a rrr WR n al ar Diagnostic LEDS 23 aaa a a a a een ke wesw System Overview ax 0 eas System Operation asanaaanan Module Operation 0000 0 Module Addressing sasanaa Compatibility with Thermocouple and Millivolt Devices and Cables Block Diagram of Isolated Channel Input Circuits Chapter 2 Required Tools and Equipment 00 00 IR 2 Chapter 3 Electrostatic Damage Power Requirements o a uaaa aa Considerations for a Fixed Controller Module Installation and Removal Terminal Block Removal nas Module Installation Procedure Wiring wie Mod le is iis up RR ES RUD cR Cop o3 Cold J unction Compensation CJC Wiring Considerations s ssi Shade bated tae ROO GC op ina Preparing and Wiring the Cables Installing the Ferrite Collar Chapter 4 Module DC o0 ia ia Module Addressing on iczhud soe an cee Y ER Spe Rs Output Image Configuration Words Input Image Data Words and Status Words Input Channel Characteristics Channel Cut off Frequency Update Time and Step Response Effective Resolution of a Channel and Input Device Respo
42. ag the error while it ramps the channel input Units Degrees C 0 Select C F for thermal inputs Ignored for mV inputs 8 OF oC Important For EU x1 and F 0 1 F an over range error Degrees F 1 will occur above 3276 7 F cannot exceed 32767 counts 9 10 Unused Unused 0 0 These bits must be zero for a valid configuration Disable unused channels for faster response Channel of 0 When set the module configures the channel and reads the ane channel input before setting bit 11 in the status word Chnl If you change the configuration word the status word must 11 E hi reflect the change before new data is valid If you clear the nable configuration word the module clears channel and status Channel On 1 words Fora new configuration word channel data and status words remain cleared until the module sets this bit 11 in the status word 12 15 Unused Unused 0000 These bits must be zero for a valid configuration Enter Your Bit Selections gt gt 0000 For the Channel Configuration Word Publication 1746 6 16 January 1999 B 3 Appendix B Channel Configuration Worksheets Select your bit configurations Write them down at the bottom of the worksheet Use one worksheet for each channel Channel Configuration Word 0 e 0 through O e 3 Bit Descriptions h its in the Ch l fi ion W Bit s
43. any of the following invalid configurations e configuration bits 0 3 invalid inputtypez1100 0r1101 or1110 configuration bits 6 7 invalid code for open circuit mode 1 configuration bits 9 10 and 12 15 invalid non zero bit setting Module Status LED Green The module status LED indicates when the module detects a non recoverable fault at power up or during operation For this type of fault the module nolonger communicates with the SLC processor disables all channels clears all data and status words A module failure is non recoverable and requires the assistance of your local distributor or Allen Bradley Support Services see Preface 8 3 Chapter 8 Module Diagnostics and Troubleshooting Troubleshooting Flowchart Check LEDs on module Module Module Channel Channel Channel Status LED off Status LED on Status LED s Status LED Status LED blinking off on Module fault Normal module Channel is Channel enabled condition operation Fault not enabled and working condition properly Check to see End Are Enable channel if that module is faulted channel s desired by setting seated properly configured for mV or channel config in chassis thermocouple word bit lle 1 Cycle
44. art Use this chapter as an abbreviated procedure for getting the module into operation or as an overview if you need the additional steps described in subsequent chapters This chapter assumes that you understand e SLC 500 products electronic process control ladder logic instructions Because this chapter is a start up guide it does not contain detailed explanations It does however refer to other chapters or to other SLC publications for more information If you are unsure of terms used or concepts presented in this chapter always read the referenced chapters before trying to apply the information This chapter will tell you what equipment you need explain how to install and wire the module show you how to set up one channel for thermocouple input examine the state of the LEDs at normal startup examine the channel status word Have the following tools and equipment ready medium blade screwdriver medium cross head screwdriver thermocouple or millivolt sensor thermocouple extension wire if needed the module I O chassis SLC processor and power supply programming equipment Programming examples in this manual demonstrate the use of Allen Bradley s Advanced Programming Software for personal computers Chapter 2 Quick Start Procedures E kl Unpack the Module Reference Important Follow these precautions to prevent damaging the module from electrostatic discharge e Before handling the module rid
45. asy terminal identification Cable Tie Slots Secure input wiring at the module Self Locking Tabs Secure module in chassis slot Publication 1746 6 16 January 1999 1 3 Chapter 1 Module Overview Diagnostic LEDs The module contains diagnostic LEDs that help you identify the source of problems that may occur during power up or during normal operation Power up and channel diagnostics are explained in chapter 8 Module Diagnostics and Troubleshooting System Overview The module communicates with the SLC 500 processor and receives 5 Vdc and 24Vdc power from the system power supply through the parallel back plane interface No external power supply is required You may install as many thermocouple modules in the system as the power supply can support SLC Processor Thermocouple Modules Each module channel can receive input signals from a thermocouple or a mV analog input device You configure each channel to accept either one When configured for thermocouple input types the module converts analog input voltages into cold junction compensated and linearized digital temperature readings The module uses the National Bureau of Standards NBS Monograph 125 and 161 based on IPTS 68 for thermocouple linearization When configured for millivolt analog inputs the module converts analog values directly into digital counts The module assumes that the mV in
46. cates the following status bits 0 10 reflect the channel configuration bit 11 indicates whether the channel is enabled or disabled configuration bits 12 15 indicate detected faults should they occur We present status words as they appear in the input image table at I e 4 I e 7 Module Input Image Status Words wa chgcrampstougwoo 13 12 1 0 15 14 10 9 8 1 6 4 3 2 1 ws LIT BT T T TTT 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 15 Ma I I I I 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 15 l e 6 LT II e T T T TT 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 e 7 1 detected open input condition reflect the configuration word 1 detected under range input value 1 detected over range input value 1 detected invalid channel configuration 6 6 Publication 1746 6 16 January 1999 Chapter 6 Channel Configuration Data and Status Channel Status Word Channels 0 3 I e 4 through I e 7 Bit Definitions Bit s Reflect Configured With this bit code Reflects Configuration Bits 0 11 and Indicate for 15 14 13 12 11 10 8 7 6 5 4 3 2 1 Indicates Detected Faults in Bits 12 15 TC Type J 010 0 TC Type K 0 0 0 1 TC Type T 0 0 1 0 TC Type E 0 0 1 1 TC Type R 0 1 0 0 TC Type S 0
47. contains a removable terminal block providing connections for four thermocouple and or analog input devices There are two cold junction compensation CJC sensors that compensate for the cold junction at ambient temperature rather than at freezing 0 C There are no output channels on the module You configure the module with software rather than with jumpers or switches Side Label Channel Status MR LEDs Green Al INPUT Lo A ISOLATED ML Door Label T STATUS EIFI E Module Status MODULE STATUS Iu i 5 LED Green 1 THERMOCOUPLE mV 8 i z i 4 ia CHLO i ger Removable 9 PIE Terminal Block o Do Not G Connect cu14 ea e Not med c Do Not 1 Connect Chiza rad CJC Sensors 6 Fi POH Do Not A o CJCB zi 1S Remod CHL3 CJC B Cable Tie Slots De Remove Do Wat Connect T Do not connect 7 to this terminal Self Locking Tabs Hardware Features Hardware Function Channel Status LED Indicators Display operating and fault status of channels 0 1 2 and3 Module Status LED Displays operating and fault status of the module Side Label Nameplate Provides module information Removable Terminal Block Provides electrical connection to input devices Door Label Permits e
48. e Inc Place ferrite PO Box 1 Commercial Rd collar here Wallkill NY 12589 914 895 2055 Notes ferrite collar after folding and latching 3 8 Publication 1746 6 16 January 1999 Module ID Code Publication 1746 6 16 January 1999 Chapter Preliminary Operating Considerations This chapter explains how the module and the SLC processor communicate through the processor s I O image tables It also describes the module s input filter characteristics Topics discussed include module ID code module addressing input channel characteristics response to slot disabling The module ID code is a unique number assigned to each type of 1746 I O module The ID defines for the processor the type of I O module and the number of words used in the processor s I O image table With APS software use the system I O configuration display to manually enter the module ID when assigning the slot number during configuration Do this by selecting other from the list of modules on the system I O configuration display and enter 3515 the ID code for the 1746 INT4 module No special I O configuration SPIO CONFIG is required The module ID automatically assigns the correct number of input and output words If you are using a different programming software package refer to the documentation that came with your software 44 Chapter 4 Preliminary Operating Considerations Module Addressing The follow
49. e temperature is inside the control cabinet as read by the CJC thermistor Then restore the original channel configuration We use N10 4 to store the new configuration word Consider input I 1 0 0 as a pushbutton switch for changing configurations The one shot instruction OSR enables the Copy instruction once no matter how long the operator presses the pushbutton switch Program Set up all four channels 8 1 COP E COPY FILE 15 Source N10 0 Dest 0 3 0 Length 4 Set channel 2 to CJ C MOV I 1 0 B3 MOVE Tu OSR Source N10 4 0 0 Dest 0 3 2 Set channel 2 back to type K I 1 0 B3 MOV 1 t OSR MOVE 0 1 Source N10 2 Dest 0 3 2 JEND Data Table 15 data 0 address 15 data 0 0000 1001 0001 0001 N10 3 0000 1001 0001 0001 0000 1001 0001 0001 N10 4 0000 1001 0001 1111 0000 1001 0001 0001 Important While the module changes the channel configuration it does not monitor inputs to any channel For the delay in reading inputs refer to Channel Update Time in chapter 4 7 3 Chapter 7 Ladder Programming Examples Verify Changes toa When changing a channel configuration there is always a delay until the Channel Configuration ladder logic reads the new data word based on the new configuration Therefore it is important to verify that a the module successfully stored the new channel configuration word The following example explains how to verify a change to a channel c
50. en 59 and 93C and 3 4 percent between 93 and 371C Type T thermocouples can also be supplied to meet special limits of error which are equal to one half the standard limits of error given above plus a limit of error of 1 percent is specified between 184 and 59C The recommended upper temperature limit for protected Type T thermocouples 371C applies to AWG 14 1 6mm wire For smaller wires it decreases to 260C for AWG 20 0 8mm and 240C for AWG 24 or 28 0 5 or 0 3mm tshould be noted that the Constantan element of Type J thermoelements is NOT interchangeable with the Constantan element of Types T or N due to the different ration of copper and nickel in each C 3 Appendix C Thermocouple Descriptions E Type Thermocouple C4 Nickel Chromium vs Copper Nickel Constantan Type E thermocouples are recommended by the ASTM Manual 1970 for use in the temperature range from 250 to 871C in oxidizing or inert atmospheres The negative thermoelement is subject to deterioration above about 871C but the thermocouple may be used up to 1000C for short periods The ASTM Manual 1970 indicates the following restrictions at high temperatures They should not be used in sulfurous reducing or alternately reducing and oxidizing atmospheres unless suitable protected with protecting tubes They should not be used in vacuum at high temperatures for extended times because the Chromium in the positive thermoe
51. ercial thermocouples be 2 2C between 0 and 277C and 3 4 percent between 277 and 1260C Limits of error are not specified for the Type K thermocouples below OC Type K thermocouples can also be supplied to meet special limits of error which are equal to one half the standard limits of error given above The recommended upper temperature limit for protected Type K thermocouples 1260C applies for AWG 8 3 3mm wire For smaller wires it decreases to 1093C for AWG 14 1 6mm 982C for AWG 20 0 8mm and 871C for AWG 24 or 28 0 5 or 0 3mm Publication 1746 6 16 January 1999 T Type Thermocouple Publication 1746 6 16 January 1999 Appendix C Thermocouple Descriptions Copper vs Copper Nickel lt Constantan gt The homogeneity of most Type TP and TN or EN thermoelements is reasonably good However the Seebeck coefficient of Type T thermocouples is moderately small at subzero temperatures about 5 6uV K at 20K being roughly two thirds that of Type E thermocouples This together with the high thermal conductivity of Type TP thermoelements is the major reason why Type T thermocouples are less suitable for use in the subzero range than Type E thermocouples Type T thermocouples are recommended by the ASTM 1970 for use in the temperature range 184 to 371C in vacuum or in oxidizing reducing or inert atmospheres The recommended upper temperature limit for continuous service of protected Type T thermocoupl
52. es is set at 371C for AWG 14 1 6mm thermoelements since Type TP thermoelements oxidize rapidly above this temperature However the thermoelectric properties of Type TP thermoelements are apparently not grossly affected by oxidation since Roeser and Dahl 1938 observed negligible changes in the thermoelectric voltage of Nos 12 18 and 22 AWG Type TP thermoelements after heating for 30 hours in air at 500C At this temperature the Type TN thermoelements have good resistance to oxidation and exhibit only small changes in thermal emf with long exposure in air as shown by the studies of Dahl 1941 Operation of Type T thermocouples in hydrogen atmospheres at temperatures above about 370C is not recommended since severe embrittlement of the Type TP thermoelements may occur Type T thermoelements are not well suited for use in nuclear environments since both thermoelements are subject to significant changes in composition under thermal neutron irradiation The copper in the thermoelement is converted to nickel and zinc Because of the high thermal conductivity of Type TP thermoelements special care should be exercised in the use of the thermocouples to insure that both the measuring and reference junctions assume the desired temperatures ASTM Standard E230 72 in the Annual Book of ASTM Standards 1972 specifies that the standard limits of error for Type T commercial thermocouples be 2 percent between 101 and 59C 0 8C betwe
53. he channel for the input type connected to it 0 3 Input yp Valid inputs are thermocouples and analog input signals Type 50mV 1 0 0 0 of 50mV and 100mV You can configure the channel to 100mV 1 0 0 1 read the cold junction CJ C temperature When reading the CJ C temperature the channel ignores the physical TC Type C 1 0 1 0f input signal TC Type D 1 0 1 Invalid YYY A Invalid 1140 Invalid HAFA CJC Temp 11 1 i Select the channel data format from SA Engineering units EU x1 or x10 l For EU x1 values are in 0 1 degrees or 0 01mV Data Engr Units x10 For EU x10 values are in whole C or F or 0 1mV 4 5 Format Scaled for PID value is the same for any input type Scaled for P ID Proportional input signal range is scaled to 0 16 383 counts Proportional counts value is same for any input type Counts Proportional input signal range is scaled to 32 767 counts For more information refer to next page Zero Select module response to a detected open circuit from Zero to force the channel data word to zero Upscale to force the channel data word to full scale 2 at i Downscale to force channel data word to low scale uon Downscal Important A bit selection or 1 1 is invalid oce acae For an open CJC thermistor mV channels are not affected Important The module requires 500 msec or one module Invalid update to flag the error while it ramps the channel input Units Degrees C Select C F for thermal inputs Ignored for mV inpu
54. ibes module hardware features and 1 Ov rview operation 2 Quick Start Serves as a Quick Start Guide for this module Provides installation information and wiring 3 Installation and Wiring guidelines A Describes the module ID code I O image words 4 ee used by the module input channel characteristics and response to slot disabling 5 Accessing Files Describes how to use the software to create a new to Configure 1 0 file and configure I O for system hardware Describes configuration and status words used by 6 Channel Configuration the module Explains how the module uses Data and Status configuration data and generates status during operation Gives ladder logic examples for configuring and Ladder P rogramming operating the module that include verifying changes Examples in configuration using the PID instruction monitoring status bits and enabling autocalibration 8 Module Diagnostics and Explains how to interpret LEDs and correct Troubleshooting problems that may occur while using the module 9 Application Programming Describes how to write ladder logic to achieve Examples desired results for two example applications Appendices Title Content lo u Provides physical electrical environmental and A Haile S pecincatons functional specifications for the module B Channel Configuration Provides a worksheet to help you configure each Worksheets channel for operation T Gives you information about thermocouples and S Thermocouple Descri
55. igure all four channels to read in degrees Celsius The default for channel 0 is to read the ambient temperature thermocouple Degrees Selector S witch Celsius Configure Channels I 2 0 B3 COP 1 1 OSR COPY FILE 0 3 Source N10 4 Dest 0 1 0 Length 4 Publication 1746 6 16 January 1999 Chapter 9 Application Programming Examples Rung 2 4 If the ambient cabinet selector switch is switched to ambient and the degrees selector switch is switched to Celsius configure channel 0 to read the ambient temperature thermocouple in degrees Celsius Degrees Ambient C abinet Selector Switch Selector Switch Celsius Ambient Configure Channels I 2 0 I 2 0 B3 MOV t 1I oSR MOVE 0 T 4 Source N10 4 Dest 0 1 0 Rung 2 5 If the ambient cabinet selector switch is switched to cabinet and the degrees selector switch is switched to Celsius configure channel 0 to read the CJ C sensor in degrees Celsius Degrees Ambient Cabinet Selector Switch Selector Switch Celsius Cabinet Configure Channels 1 2 0 1 2 0 B3 Mov I OSRH MOVE 0 1 5 Source N10 9 Dest 0 1 0 Rung 2 6 If channel 0 is configured to read the ambient thermocouple energize the ambient pilot light on the panel Ambient Light MEO 0 7 0 MASKED EQUAL C Source I 1 4 0 Mask FEFF Compare N10 4 Rung 2 7 If channel 0 is con f igured to read the CJ C sensor energi
56. in drift The change in full scale transition voltage measured over the operating temperature range of the module input data scaling Depends on the data format that you select for the channel data word You can select from scaled for PID or Engineering Units for millivolt thermocouple or CJC inputs which are automatically scaled You may also select proportional counts which you must compute to fit your application s temperature or voltage resolution local system A control system with I O chassis within several feet of the processor and using1746 C7 or 1746 C9 ribbon cable for communication LSB Least Significant Bit The bit that represents the smallest value within a string of bits Refers to a data increment defined as the full scale range divided by the resolution multiplexer An switching system that allows several input signals to share a common A D converter normal mode rejection differential mode rejection A logarithmic measure in dB of a device s ability to reject electrical noise between differential inputs but not between an input and ground or ground reference remote system A control system where the chassis can be located several thousand feet from the processor chassis Chassis communication is via the 1747 SN Scanner and 1747 ASB Remote I O Adapter resolution The smallest detectable change in a measurement typically expressed in engineering units e g 0 15C or as a number of bits
57. ing memory map shows you how the SLC processor s output and input image tables are defined for the module Bit15 Bit0 Ad HE Output Image Calibration Word Words 4 6 amp 7 Output Image not defined 8 Words a Input Image Eus i Bit15 Bit 0 returns calibration status during calibration Thermocouple SLC 5 0X Module Data Files Image Table Ad Word 0 Word 1 Word 2 Word 3 Word 4 Word 5 Word 6 Word 7 Class 1 Output Image Configuration Words Eight words of the SLC processor s output image table are reserved for the module Output image words 0 3 are used to configure the module s input channels 0 3 Each output image word configures a single channel and can be referred to as a configuration word Word 5 is used for calibration Each word has a unique address based on the slot number assigned to the module The remaining three words are not used Example Address If you want to configure channel 2 on the module located in slot 4 in the SLC chassis your address would be 0 4 2 Slot File Type p d YA Element Word Delimiter Delimiter Chapter 6 Channel Configuration Data and Status gives you detailed bit information about the data content of the configuration word 4 2 Publication 1746 6 16 January 1999 Chapter 4 Preliminary Operating Considerations Input Image Data Words and Status Words Eight words of the S
58. ire from sensor end of the cable Signal Wires At the module end of the cable extract the drain wire but remove the foil shield Drain Wire signal Wires 1 Ateach end of the cable strip some casing to expose individual wires 2 Trim signal wires to 5 inch lengths beyond the cable casing Strip about 3 16 inch 4 76 mm of insulation to expose the ends of the wires 3 At the module end of the cables Figure 3 2 extract the drain wire and signal wires remove the foil shield bundle the input cables with a cable strap 4 Connect drain wires together and solder them to a 3 8 wire braid 12 long Keep drain wires as short as possible 5 Connect the 3 8 wire braid to the nearest chassis mounting bolt 3 6 Publication 1746 6 16 January 1999 Ungrounded End at Source Device Wires Y Remove drain wire and 3 9 foil shield at casing Cables Keep the length of unshielded wires as short as possible Publication 1746 6 16 January 1999 Chapter 3 Installation and Wiring 6 Connect the signal wires of each channel to the terminal block Important Only after verifying that your connections are correct for each channel trim the lengths to keep them short Avoid cutting leads 00 short At the source end of cables from mV devices Figure 3 2 remove the drain wire and foil shield apply shrink wrap as an option connect to mV devices keeping the leads short Im
59. is Type of Device We Recommend This Cable or equivalent Thermocouple Type J EIL Corp J 20 5 502 Thermocouple Type K EIL Corp K20 5 510 Thermocouple Type T EIL Corp T20 5 502 other Thermocouple types consult with EIL Corp or other manufacturers Alpha Suprashield XTRA GUARD 1 mV devices 5121 lpr 5122 2pr 5131 3pr 5141 Apr Block Diagram of Isolated A Terminal Block Module Circui Channel Input Circuits 0 Terminal Block Module Circu PM a 1 ote CJ CA Sensor hod i i Open Circuit Channel 0 L a Detection Analog to 8 Hz Digital Value UOA Multiole Digital Digital gt Channel amp EE d P9X Convert i CICS S gt onvertor Filter CJC Sensor l l Signal wire braid G i i WO Chassis ta 6 Analog to Ground O 8 Digital Digi gt Digital Value Oi gt Convertor Filter Channel 1 Ed M 10 i SS r Analog to 8Hz ON Bur Digital Digital gt Digital Value Onm gt Convertor Filter Channel 2 TEE NEU 14 i ur ter 09 8Hz Digital Value m ere Digital Digital gt Channel3 amp Convertor Filter CJC Sensor i i Signal Lig CJ CB Sensor 1 D D f 18 i Nu 2 J 1 0 Chassis Ground 1 6 Publication 1746 6 16 January 1999 Required Tools and Equipment Publication 1746 6 16 January 1999 Chapter Quick St
60. isable unused channels for faster response Channel Off 0 When set the module configures the channel and reads the anne channel input before setting bit 11 in the status word Chnl If you change the configuration word the status word must 11 Enabl reflect the change before new data is valid If you clear the nable configuration word the module clears channel and status words Fora new configuration word channel data an Channel On 1 ds F configurati d channel data and status words remain cleared until the module sets this bit 11 in the status word 12 15 Unused Unused 0000 These bits must be zero for a valid configuration Enter Your Bit Selections gt gt 0000 For the Channel Configuration Word B 2 Publication 1746 6 16 January 1999 Appendix B Channel Configuration Worksheets Select your bit configurations Write them down at the bottom of the worksheet Use one worksheet for each channel Channel Configuration Word 0 e 0 through O e 3 Bit Descriptions Set these bits in the Channel Configuration Word Lu Bit s Define To Select EE Description 15 12 11 10 9 8 7 6 5 4 3 2 1 TC Type J 0 0 0 TC Type K ojoro i Projet TC Type T olo 1 o SlotNumber TC Type E o o 1 1 Channel Number __ TC Type R 0 1 0 0 TC Type S 0 1 0 1 TC Type B 0 1 1 0
61. it on the label found on the side of the processor Then in the upper pop up window cursor to the correct operating system and press ENTER Now you are ready to configure the I O of your SLC system You do this by telling the software what hardware your system is using 5 2 Publication 1746 6 16 January 1999 Chapter 5 Accessing Files to Configure 1 0 Configure 1 0 To configure your I O start with the processor selection screen shown in step 3 on previous page 1 Press CONFIGR I O F5 You see the following I O configuration screen 2 What you do next depends on what you want to do If you want to and your SLC System use the APS Read Config feature is installed and wired READ CONFIG 1 Follow prompts to configure for SLC 5 03 and later processors F1 for SLC system hardware 2 Then return to step 10 manually configure the software e is a fixed hardware system MoprFy Racks Go to step 3 next e uses an SLC 5 01 or 5 02 or F4 e is NOT installed or wired 3 To configure the first I O rack press RACK 1 F1 Observe this pop up window 4 Cursor to the description of the I O rack you are using and press ENTER The screen displays the rack description for rack 1 top of screen and removes the pop up window 5 If using more I O racks repeat steps 3 and 4 for rack 2 followed by rack 3 Publication 1746 6 16 January 1999 5 3 Chapter 5 Accessing Files to Configure 1 0
62. lement vaporizes out of solution and alters the calibration They should also not be used in atmospheres that promote green rot corrosion those with low but not negligible oxygen content The negative thermoelement a copper nickel alloy is subject to composition changes under thermal neutron irradiation since the copper is converted to nickel and zinc ASTM Standard E230 72 in the Annual Book of ASTM Standards 1972 specifies that the standard limits of error for the Type E commercial thermocouples be 1 7C between 0 and 316C and 1 2 percent between 316 and 871C Limits of error are not specified for Type E thermocouples below OC Type E thermocouples can also be supplied to meet special limits of error which are less than the standard limits of error given above 1 25C between 0 and 316C and 3 8 percent between 316 and 871C applies to AWG 8 3 3mm wire For smaller wires the recommended upper temperature decreases to 649C for AWG 14 1 6mm 538C for AWG 20 0 8mm and 427C for AWG 24 or 28 0 5 or 0 3mm itshould be noted that the Constantan element of Type thermoelements is NOT interchangeable with the Constantan element of Types T or N due to the different ration of copper and nickel in each Publication 1746 6 16 January 1999 Appendix C Thermocouple Descriptions S and R Type Thermocouples S Platinum 10 Rhodium vs Platinum R Platinum 13 Rhodium vs Platinum The ASTM manual STP 470 197
63. m the transfer of the configuration word from step 6 to the module Ladder 1 Usingthe memory map function create integer file N10 Integer file N10 should contain one Programming element for each channel used Forthis example we used N10 0 Examples 2 Enter configuration parameters for channel 0 from step 6 into N 10 0 In this example all the bits of N10 0 are zero except for the channel enable bit N10 0 11 Chapter 8 3 Program a ladder logic instruction to copy the contents of N10 0 to output word 0 1 0 Application Examples Data Table Display of Integer File N10 0 address 15 data 0 address 15 data 0 N10 0 0000 1000 0000 0000 Ladder Logic to Transfer N10 0 to the Module hoa ii COP On power up the first pass bit 5 1 15 JE COPY FILE is set for one scan enabling the COPY 15 Source N10 0 instruction to transfer the configuration word to the processor s output image Dest 0 1 0 table From there itis transferred to the Length 1 module in the processor s I O scan Publication 1746 6 16 January 1999 Chapter 2 Quick Start R Write Ladder Logic to Process Input Data Reference Chapter 5 Channel Configuration Data and Status SLC 500 Controller Chapter 6 Data Files hcm Ladder Write ladder logic to process the thermocouple input data for your application For information on programming refer to the APS User Manual publication 9399 AP SUM
64. mV 50 uV 50 uV 0 5 uV C 50 ppm C 100 mV 50 uV 50 UV 30 5 uV C 50 ppm C Assumes the module terminal block temperature is stable Publication 1746 6 16 January 1999 A 3 Appendix A Specifications Thermocouple Resolution Type C Thermocouple 0 4 0 32 C 2000 C 0 3 Resolution 0 26 C C 0 20 C 1000 C 0 2 0 1 0 0 250 500 750 1000 1250 1500 1750 2000 2250 Temperature C Type D Thermocouple 0 4 0 34 C 0 C 0 3 0 27 C 2000 Resolution C C 11009 0 2 0 1 0 250 500 750 1000 1250 1500 1750 2000 2250 Temperature C A 4 Publication 1746 6 16 January 1999 Appendix A Specifications Type J Thermocouple 25 20 0 18 C 200 C 15 Resolution C 10 F 0 06 C 275 C 0 05 C 750 C 05 0 L L 300 150 0 150 300 450 600 750 900 Temperature C Type K Thermocouple 4 0 3 40 250 C 3 0 Resolution C 2 0 1 0 0 08 C 550 C 10 C 1350 C 0 1 300 150 0 150 300 450 600 750 900 1050 1200 1350 1500 Temperature C Publication 1746 6 16 January 1999 A 5 Appendix A Specifications
65. ncy is defined as the point on the frequency response curve where frequency components of the input signal are passed with 3 dB of attenuation by the input filter All frequency components above cut off frequency are increasingly attenuated as show in the graph next page Cut off frequency is also defined as the Normal Mode Rejection NMR in dB of attenuation at 50 Hz European or at 60 Hz American We define module update time as the time required for the module to sample and convert channel input signals multiplex them with the CJC reference value and make the resulting values available to the SLC processor It is typically 200 ms for multiplexing and 200 ms for sampling and converting Publication 1746 6 16 January 1999 4 3 Chapter 4 Preliminary Operating Considerations When sampling occurs after the signal reaches 99 9 of final value the update time defines the minimum time 400 ms for processing an input signal 4 4 Publication 1746 6 16 January 1999 Chapter 4 Preliminary Operating Considerations hen sampling occurs just before the signal reaches 99 9 of final value we define step response worst case as the sum of the times required for the analog input signal to change from 0 to 99 9 of its expected final value see graph It includes the times required for e input filter 180 ms e CJC multiplexer 200 ms A D converter 200 ms This defines the maximum time required for processing an inp
66. ne that the data transfer was made without error the data can be used in your ladder program Module Operation The module s input circuitry consists of four differential analog inputs each with its own analog to digital A D convertor The A D convertors read the analog input signals and convert them to digital counts The input circuitry also continuously samples the CJC sensors and compensates for temperature changes at the cold junction terminal block The figure on the following page shows a block diagram for the analog input circuitry Module Addressing The module requires eight words each in the SLC processor s input and output image tables Addresses for the module in slot e are as follows Le 0 3 thermocouple mV data for channels 0 3 respectively I e 4 7 status data for channels 0 3 respectively O e 0 3 configuration data for channels 0 3 respectively O e 4 7 reserved for future use Do not use Compatibility with Thermocouple and Millivolt Devices and Cables The module is compatible with the following NBS MN 125 and 161 standard types of thermocouples B C D E J K N R S and T and extension wire Refer to appendices A and C for details The module is also compatible with a variety of mV devices with an output of 50 or 100 mV 1 5 Chapter 1 Module Overview To minimize interference from radiated electrical noise we recommend twisted pair and highly shielded cables such as the following For Th
67. nel ignores the physical TC Type C 1 0 1 0 input signal TC Type D 1 0 1 1 Invalid 1 1 0 0 Invalid 1 1 0 1 Invalid 1 11 0 CJC Temp 1 1 1 1 i Select the channel data format from SB d Engineering units EU x1 or x10 For EU x1 values are in 0 1 degrees or 0 01mV Data Engr Units x10 0 1 For EU x10 values are in whole C or F or 0 1mV 4 5 Format Scaled for PID value is the same for any input type Scaled for P ID 1 0 Proportional input signal range is scaled to 0 16 383 counts Proportional counts value is same for any input type Counts t Proportional input signal range is scaled to 32 767 counts NENNEN NN For more information refer to chapter 6 Zero 0 0 Select module response to a detected open circuit from Zero to force the channel data word to zero Upscale to force the channel data word to full scale PP Em Upscale s Downscale to force channel data word to low scale Nos D 10 Important A bit selection or 1 1 is invalid ode ownscate For an open CJ C thermistor mV channels are not affected 7 Important The module reguires 500 msec or one module Invalid 11 update to flag the error while it ramps the channel input Units Degrees C 0 Select C F for thermal inputs Ignored for mV inputs 8 OF oC Important For EU x1 and F 0 1 F an over range error Degrees F 1 will occur above 3276 7 F cannot exceed 32767 counts 9 10 Unused Unused 0 0 These bits must be zero for a valid configuration D
68. nel status LEDs Green The channel status LED operates with status bits in the channel status word to indicate the following faults detected by the module invalid channel configuration anopen circuit input e out of range errors When the module detects any of the following fault conditions it causes the channel status LED to blink and sets the corresponding fault bit in the channel status word Channel fault bits bits 12 15 and channel status LEDs are self clearing when fault conditions are corrected Open circuit Detection Bit 12 The module tests all enabled channels for an open circuit condition each time it scans its inputs Possible causes of an open circuit include broken thermocouple or CJC thermistor thermocouple or CJC thermistor wire cut or disconnected Out Of Range Detection Bit 13 for under range bit 14 for over range The module tests all enabled channels for an out of range condition each time it scans its inputs Possible causes of an out of range condition include the temperature is too hot or too cold for the thermocouple being used atype B thermocouple may be registering a F value in EU x1 beyond the range allowed by the SLC processor beyond 32 767 for the data word e a CJC thermistor may be damaged or the temperature within the cabinet containing the module may be outside the CJC thermistor range limits Invalid Channel Configuration Bit 15 The module sets this fault bit when it detects
69. nnect to this terminal ATTENTION Disconnect power to the SLC before attempting to install remove or wire the terminal block Publication 1746 6 16 January 1999 Publication 1746 6 16 January 1999 Chapter 3 Installation and Wiring Cold Junction Compensation CJC ATTENTION Do not remove or loosen the cold junction compensating thermistors located on the terminal block Both thermistors are critical to ensure accurate thermocouple input readings at each channel The module will not operate in the thermocouple mode if a thermistor is removed In case of accidental removal of one or both thermistors replace them by connecting them across the CJC terminals located at the top and or bottom left side of the terminal block Always connect the red lug to the terminal to CJC A or CJC B Thermistor CE G9 Always attach red lug to the CJ C terminal id C9 G9 Bottom of Terminal Block Wiring Considerations Thermocouple inputs are highly susceptible to electrical noise due to the small signal amplitudes microvolt C Most applications require that the processor and I O chassis be installed in an industrial enclosure to reduce the effects of electrical interference Consider the following conditions when selecting a slot location for the module Position the module away from other modules that connect to sources of electrical noise such a
70. nse to SlotDisabling Input Response sy okies enw ake dr wards Rr Was Output Response wa RR ri X acc nana ka naa ii Table of Contents Accessing Files to Configure 1 0 Channel Configuration Data and Status Ladder Programming Examples Module Diagnostics and Troubleshooting Chapter 5 Create a New File anre regie neag o ear a a Return to an Existing File Chapter 6 Channel Configuration Selecting the Correct Data Format Channel Configuration Procedure Using Using Detected Faults Indicated by Bits 12 15 Chapter 7 Processor BASICS sii 2i444 udu esexekzeted ee wae eR as Load Channel Configurations for Transfer to the Module dise cs AE araea a a EA Change a Channel Configuration Verify Process a Channel Input with the PID Instruction Monitor Channel Status Bits Chapter 8 Module and Channel Diagnostics Module Diagnostics atPower up 00 00 eee eee ee ENN chs wee hema p wa ewe A EE eee LEDUINGICGUS d ctuseidecsadumdudmedes dun Vp bs Vae Channel status LEDs Green Open circuit Detection Bit12 Out Of R ange Detection Bit 13 for unde
71. of one minute CSA logo is a registered trademark of the Canadian Standards Association PLC is a registered trademark of Allen Bradley Company Inc Publication 1746 6 16 January 1999 GE d utilisation dans des emplacements dangereux par la A La CSA certifie les produits d utilisation g n rale aussi bien que ceux qui s utilisent dans des emplacements dangereux La certification CSA en vigueur est indiqu e par l tiquette du produit et non par des affirmations dans la documentation l usage des utilisateurs CL DIV 2 Exemple d tiquette de certification d un produit par la CSA GP A B C D TEMP um P our satisfaire la certification de la CSA dans des endroits dangereux les informations suivantes font partie int grante de la documentation des produits industriels de contr le Allen Bradley certifi s par la CS A e Cet quipement convient l utilisation dans des emplacements de Classe Division 2 Groupes A B C D ou ne convient qu a l utilisation dans des endroits non dangereux e Les produits portant le marquage appropri de la CSA c est dire Classe Division 2 Groupes A B C D sont certifi s l utilisation pour d autres quipements o la convenance de combinaison application ou utilisation est d termin e parla CSA ou le bureau local d inspection qualifi Important Par suite de la nature modulaire du syst me de contr le PLC le produit ayant le taux le plus lev de temp
72. of the status file A rung of ladder logic copies calibration codes into the output image table for transfer to the module and another rung copies calibration status from the module input image table into the data table You perform calibration with the SLC processor in run mode For more information on addressing calibration words refer to chapter 4 Calibration Logic Before starting the procedure enter the following calibration rungs into processor memory Copy Calibration Codes to the Module COP COPY FILE Source N7 10 Dest 0 6 0 Length 8 Copy Calibration Status into the Data Table COP COPY FILE Source 1 6 0 Dest N7 0 Length 8 Appendix D Channel Calibration Calibration Codes and Status Use the following format for entering calibration code words and reading calibration status bits You will enter calibration values in Hex You can read channel status OK bits at different steps in the calibration procedure one bit for each channel you are calibrating Use Word 5 Output Image Configuration Word for Entering Calibration Codes 15 12 1 08 07 04 03 00 Code LLLELLLELELELLLEL Word 5 Calibration l 1 Codes in Hex pr Words 4 and 5 i Status a A Reading s Status Channel Status Word 4 During Calibration OK status bits 1 x for channels 3 2 1 0 high end calbraton OK status bits 1 RS forchannels 3 2 1 0 end scab Status Channel Sta
73. onfiguration Example Change the channel configuration word and verify the change by comparing the resulting status word with the configuration word for equality We do this by adding rung 2 3 to the rungs in the previous example Program Rung 2 0 Set up all four channels S 1 COR lt COPY FILE 15 Source N10 0 Dest 0 3 0 Length 4 Rung 2 1 Set channel 2 to CJ C MOV I 1 0 B3 MOVE 1 a i Source N10 4 Dest O 3 2 Rung 2 2 Set channel 2 back to type K I 1 0 B3 MOV 1 E OSR MOVE 0 i Source N10 2 Dest 0 3 2 Check that the configuration written to channel 2 is Rung2 3 being echoed back in channel 2 s status word Data valid EQU B3 EQUAL 6 Source A I 3 6 3 Source B 0 3 2 Rung 2 4 END Data Table address 15 data 0 address 15 data 0 N10 0 0000 1001 0001 0001 N10 3 0000 1001 0001 0001 N10 1 0000 1001 0001 0001 N10 4 0000 1001 0001 1111 N10 2 0000 1001 0001 0001 7 4 Publication 1746 6 16 January 1999 Chapter 7 Ladder Programming Examples Process a Channel Input The module was designed to input a channel directly to a PID instruction of with the PID Instruction an SLC 5 02 or later processor without the need of an intermediate scale operation Example Use channel data as the process variable for the PID instruction 1 Select scaled for PID as the data type in the channel configuration word 2 Specify channel data word as the p
74. ons It has been designed and tested to meet the following directives EMC Directive This product is tested to meet Council Directive 89 336 EEC Electromagnetic Compatibility EMC and the following standards in whole or in part documented in a technical construction file EN 50081 2EMC Generic Emission Standard Part 2 Industrial Environment EN 50082 2EMC Generic Immunity Standard Part 2 Industrial Environment This product is intended for use in an industrial environment Low Voltage Directive 1 This product is tested to meet Council Directive 73 23 EEC Low Voltage by applying the safety requirements of EN 61131 2 Programmable Controllers Part 2 Equipment Requirements and Tests For specific information required by EN 61131 2 see the appropriate sections in this publication as well as the following Allen Bradley publications Industrial Automation Wiring and Grounding Guidelines for noise immunity publication 1770 4 1 Automation Systems Catalog publication B111 This equipment is classified as open equipment and must be mounted in an enclosure during operation to provide safety protection Chapter 1 Module Overview General Description The module stores digitally converted thermocouple and or millivolt mV analog data in its image table for retrieval by all fixed and modular SLC 500 processors The module supports connections from any combination of up to four thermocouple and or m
75. ot used After module installation you must configure each channel to establish the way the channel operates e g thermocouple type temperature units etc You configure the channel by setting bits in the configuration word using your programmer We present bit descriptions next For information on addressing using your software and programming refer to chapters 4 5 and 7 respectively SLC Output Image Configuration Words se 111 1 T mim T T T T T 15 14 13 12 11 4 3 2 1 0 oer L 10 9 8 1 6 CT DET TI I ILI 4 3 2 1 0 10 9 8 6 5 10 8 5 14 13 12 ll 7 1 o2 LITT I I I s T I III 5 14 13 12 ll 7 1 0 1 9 6 5 4 3 2 wr CEL PO co f p opo 4 3 2 1 0 Not Used Publication 1746 6 16 January 1999 13 12 1 10 9 8 I 6 5 e slot number of the module The configuration word default settings are all zero Next we describe how you set configuration bits of a channel configuration word to set up the following channel parameters type of thermocouple or mV input data format such as engineering units counts or scaled for PID how the channel should respond to a detected open input circuit temperature units in C or F whether the channel is enabled or disabled Chapter 6 Channel Configuration Data and Status Channel Configuration Word 0 e 0 through O e 3 Bit Descriptions
76. pe ste feiern acd SHEER Chilled Thermocouple Cabinet Bath i AC oF Thermocouple g Type K Type i Steam Thermocouple Ambient Y me Sa Steam Pipe eee Selector Switches 1 2 1 and I 2 0 Oe E Publication 1746 6 16 January 1999 9 3 Chapter 9 Application Programming Examples Channel Configuration All channels are configured for display temperature to tenths of a degree zero data word in the event of an open circuit Configuration setup for ambient thermocouple channel 0 type T thermocouple Configuration setup for bath thermocouple e channel 1 type J thermocouple Configuration setup for steam thermocouple channel 2 type K thermocouple Configuration setup for chilled HzO thermocouple channel 3 type J thermocouple Configuration setup for cabinet temperature channel 0 CJC temperature 0100 0101 ypeR 1011 TypeD ypeS 1111 CJC temp Configuration Word 15 14 13 12 11 10 9 8 71 6 5 4 3 2 1 0 Not Used Channel Not Used Temp Response to Data Type Enable Units Open Circuit Format of Input 0110 TypeB 0 Disable 0 C 00 2zeo 00 EUxl 0000 Type 0111 TypeN 1 Enable 1 01 FS 0 1 EU x10 0001 TypeK 1000 0 100 mV 10 LS 10 ScaledPID 0010 TypeT 1001 100 1 1 Prop Counts 0011 TypeE 1010 TypeC Configuration Words for this Example
77. pendix F CSA Hazardous Location Approval F 2 Publication 1746 6 16 January 1999 Publication 1746 6 16 January 1999 Index A D AD D data I abbreviations D resolution 6 addressing 4 data word format scaling ranges by input configuration word 4 2 type 6 addressing example 4 dB D data word 4 decibel D addressing example 4 8 eee status wordl 4 8 default setting of configuration word 6 addressing example 4 definition of terms D alarms 7 5 diagnostics 8 application examples 9 differential mode rejection D attenuation D See also normal mode rejection digital filter D disabling a channdl 21d 6 2 B B B pedo bit allocation 6 door labe 1 b in iis ee word 244 642 B b B 8 in status word 6 E effective resolution D P C electrical noise 315 3 cable tie slots 1 electrical specifications A channel D electrostatic damage 3 channel configuration error 6 8 irs n ka input 2 4 614 B L B channel filter frequency 4 i s ap effects on noise filtering 4 environmental specifications A effects on update time 4 B equipment required for installation 2 chassis D errors 8 E detecting channel related errors 8 b c c 3 5 o 1 configuration errof 6 B 8 B cMRR D open circuit 6 B 8 B cold junction compensatior 345 D over range error 6 8 8 common mode rejection ratio D under range error 6 8 de
78. ple Type J EN _ w SLC 5 02 oooo Bath we LED Display DC sinking inputs BCD format Channel Configuration Configure the thermocouple channel with the following setup type J thermocouple bits 3 0 e F displayed in whole degrees with EU x10 bits 8 5 4 zero the data word in the event of an open circuit bits 7 6 Publication 1746 6 16 January 1999 9 1 Chapter 9 Application Programming Examples Configuration Word 15 14 13 12 11 10 9 8 1 6 5 4 3 2 10 Not Used Channel Not Used Temp Responseto Data Type Enable Units Open Circuit Format of Input 0 Disable 0 9C 00 zero 00 EUx1 0000 Type 0110 TypeB 1 Enable 1 9 01 FS 0 1 EU x10 0001 TypeK 0111 TypeN 10 LS 1 0 ScaledPID 0010 TypeT 1000 0 100 mV 1 1 Prop Counts 0011 TypeE 1001 2 X100 Example Configuration Word with These Parameters i A e n ae E channel enabled F zero for open circuit EU x10 Type thermocouple pe type 0 0 0 0 1 0 0 1 00 0 1 0 0 0 0 Program Rung 2 0 First Pass Bit Initialize Channel 0 S 1 MOV A t MOVE 15 Source N10 0 Dest 0 3 0 Rung 2 1 Convertthe channel 0 data word degrees F to BCD and write this to the LED display TOD TO BCD Sou
79. portant If noise persists try grounding the opposite end of the cable instead Ground one end only Figure 3 2 Cable Preparation and Connections to Minimize Electrical Noise Interference Grounded End at I O Chassis Terminal Block Signal Keep the length Wires of unshielded wires as short as possible S2 NY lt Connect I O chassis bolt to earth ground y 5s S gt 5 SS 252 Cables e 9 9 9 9 9 9 9 9 9 C eoe SS rates CL 28 gt lt Limit braid length to 12 or less Solder braid to lug attached to bottom row of I O chassis bolts CSS 3 7 Chapter 3 Installation and Wiring Installing the Ferrite Collar For immunity to electrical noise with this CE marked module insert a ferrite collar Fair Rite Inc part number 0443164151 around the input cables immediately beneath the module in the I O chassis Do this as follows 1 Bundle the cables at the module end 2 Fold the collar so that it encircles the cables 3 Press the plastic housing until the collar snaps together 4 Check that the collar is fully latched 5 If the collar slides on the cables use a cable tie to secure it module in I O chassis ood ood ferrite collar before folding bundle of cables lt in open collar ferrite collar part number 0443164151 Fair Rit
80. portional Counts to Equivalent Engineering Units in F Equation Engr Units Equivalent Sj ow Suicu Stow X Proportional Counts value displayed 32768 65536 Assume type E input type proportional counts channel data 221567 counts From Channel Data Word Format table Si ow 454 F and Spigy 1832 F Solution Engr Units Equivalent 454 F 1832 F 454 F x 21567 32768 65536 1441 3 F Convert from Engineering Units in F to Equivalent Proportional Counts Equation Proportional Counts Equivalent 65536 x Engineering Units desired Stow Suigu Stow 1 32768 Assume type E input type proportional counts desired channel temp 1000 F From Channel Data Word Format table Sj ow 454 F and Spigy 1832 F Solution Proportional Counts Equivalent 65536 x 10009F 454 F 1832 F 454 F 32768 8916 counts Publication 1746 6 16 January 1999 6 3 Chapter 6 Channel Configuration Data and Status Channel Configuration Use this procedure once for each channel to set configuration bits that Procedure determine channel operation Use the table of bit descriptions and the blank configuration worksheet in Appendix B Copy it as needed to write down configuration selections of all your channels 1 Determine the input device type thermocouple or mV for a channel and enter its respective 4 digit binary code in bit field 0 3 2 Select the data format
81. power input igi thermocouple End Is more than one LED blinking Yes Check channel status word CJ C fault bits 12 15 has occurred Configuration error Check Bit15 configuration word bits 0 3 Check that wiring is secure set 1 p _forvalidinputtype m at both CJ C assemblies and configuration as well as bits that the temperature within 6 and 7 for valid the enclosure is in the range Configuration setting limits of the CJ C sensor Rety Refer to page 1 1 Retry Over range condition Bit 14 exists The input signal is gt set 1 gt greater than the high scale m Yes limit for the channel or the CJC connections Correct and Retry Is problem Is problem corrected F corrected Is problem corrected Under range condition Bit13 exists The input signal is No m set 1 less than the low scale limit for the channel or the CJC connections Correct and Retry Contact your Contact your An open circuit condition is Contact your Ra local distributor Bit 12 present Check channel and local distributor Fa or gt set 1 CJC wiring for open or loose gt or Allen Bradley Allen Bradley connections Retry Allen Bradley 8 4 Publication 1746 6 16 January 1999 Chapter 8 Module Diagnostics and Troubleshooting Replacement Parts The module has the following
82. ppendix C Thermocouple Descriptions C and D Type Thermocouples C Tungsten 5 Rhenium vs Tungsten 26 Rhenium D Tungsten 3 Rhenium vs Tungsten 25 Rhenium Types C and D thermocouples are recommended for use in the temperature range from 0 to 2320 C in non oxidizing inert atmospheres They are not practical for use below 750 F Beware of embrittlement Code Color code Max Useful Temp Range EMF Over Useful Range Std Limits of Error C jacket wht red trace TC grade 32 4208 F 0 23209C 0 37 066 mV 4 5 4500C t wht red Ext grade 32 1600 F 0 870 C 1 0 to 2320 C D jacket wht yel trace TC grade 32 4208 F 0 2320 C 0 39 506 mV 4 5 4500C t wht red Ext grade 32 500 F 0 260 C 1 0 to 2320 C C 6 Publication 1746 6 16 January 1999 About the Procedure Publication 1746 6 16 January 1999 Appendix Channel Calibration This appendix shows you how to calibrate the module s input channels The purpose of the procedure is to store a pair of calibration values in EEPROM for each channel to set channel accuracy at 0 05 of full range regardless of channel circuit tolerances The module is designed so you can calibrate its input channels individually or in groups The thermocouple mV operation of all channels is suspended during calibration With your programming terminal you will enter calibration codes in word 5 of the configuration file and read status in words 4 and 5
83. ptions Thermocouple Descriptions J Type Thermocouple 0 cee cee eee n K Type Thermocouple 00 ccc eee eee eee T Type Thermocouple E Type Thermocouple one pde suus be EP ERRR PR ERRDW ER S and R Type Thermocouples C and D Type Thermocouples Channel Calibration Appendix D Aboutthe Procedure 1s a ai Eoi ERE E DRE LARES D socio MR D Calibration Codes and Status ID Calibration Procedure 020 ii xem reo eer ees D Terms and Abbreviations Appendix E Terms and Abbreviations ii aa CSA Hazardous Location Appendix F Approval CSA Hazardous Location Approval Publication 1746 6 16 January 1999 iv Table of Contents Publication 1746 6 16 January 1999 Compliance with European Union Directives Publication 1746 6 16 January 1999 Chapter Module Overview This chapter describes the thermocouple millivolt isolated input module and explains how the SLC controller reads thermocouple or millivolt analog input data from the module Included is information about compliance with European Union Directives general description and hardware features anoverview of system and module operation block diagram of channel input circuits If this product has the CE mark it is approved for installation within the European Union and EEA regi
84. ptions the environments in which they perform best fie a Gives you the procedure to calibrate input D Channel Calibration channel E List of Terms and Gives you the terms and abbreviations used in this Abbreviations manual Gives you the definition of the CSA hazardous F CSA Hazardous Information classification The following conventions are used throughout this manual Used in this Manual Bulleted lists such as this one provide information not procedural steps e Numbered lists provide sequential steps or hierarchical information e Textin this font indicates words or phrases you should type e Key names appear in bold capital letters within brackets for example ENTER P 2 Publication 1746 6 16 January 1999 Preface Related Documentation The following documents contain information that may be helpful to you as you use Allen Bradley SLC products To obtain a copy of any of those listed contact your local Allen Bradley office or distributor Document For Read this Document Number An overview of the SLC 500 family of products SLC 500 System Overview 1747 2 30 A description on how to install and use your ModularSLC 500 Installation amp Operation Manual for Modular 141 62 programmable controller Hardware Style P rogrammable Controllers A description on how to install and use your Fixed SLC 500 Installation amp Operation Manual for Fixed Hardware 1747 NI001 programmable controller S
85. put signal is linear System Operation At power up the module checks its internal circuits memory and basic functions During this time the module status LED remains off If the module finds no faults it turns on its module status LED Channel Data Word Channel Status Word Thermocouple Thermocouple or mV Input Analog Signals Module SLC 500 Processor Channel Configuration Word joo 1 4 Publication 1746 6 16 January 1999 Publication 1746 6 16 January 1999 Chapter 1 Module Overview After completing power up checks the module waits for valid channel configuration data from your SLC ladder logic program channel status LEDs are off After channel configuration data is transferred and channel enable bits are set for one or more channels the module turns on its channel status LEDs Then it continuously converts the thermocouple or millivolt input to a value within the range you selected for the channel Each time the module reads an input channel the module tests that data for a fault i e open circuit over range or under range condition If it detects such a condition the module sets a unique bit in the channel status word and causes the channel status LED to blink The SLC processor reads the converted thermocouple or millivolt data from the module at the end of the program scan or when commanded by the ladder program After the processor and module determi
86. r range bit 14 for over range ccc cece cee eens Invalid Channel Configuration Bit15 Module Status LED Green Troubleshooting Flowchart s READ haan Contacting Allen Bradley 2 0 Channel Data Words ccc cece eee eee ene Channel Status Words Changes to a Channel Configuration Publication 1746 6 16 January 1999 Table of Contents iii Application Programming Chapter 9 Examples Basic Example to display a temperature Channel Configuration Supplementary Example select display in C or F Channel Configuration Program SE UP se a a OUR ona A GORGE meee PL GTAM ka rat a wake bee E aa ERR Module Specifications Appendix A Electrical Specifications Physical Specifications Environmental Specifications Input Specifications Overall ACCUIACY iuuese kn e xa wx R9 n Ee Thermocouple Resolution TYPE TOO rt axes uus nn A Type K Thermocouple 23 a a a wees Type E Thermocouple saaaaas Channel Configuration Appendix B Worksheets Channel Configuration Worksheets Thermocouple Appendix C Descri
87. rature d termine le taux d ensemble du code de temp rature du syst me de contr le d un PLC dans un emplacement de Classe Division 2 Le taux du code de temp rature est indiqu sur l tiquette du produit Taux du code de temp rature CL DIV 2 Q GP A B C D SP TEMP Les avertissements suivants s appliquent aux produits ayant la certification CSA pour leur utilisation dans des emplacements dangereux Le taux du code de temp rature est indiqu ici AVERTISSEMENT Risque d explosion e La substitution de composants peut rendre ce mat riel inacceptable pour lesemplacements de Classe I Division 2 e Couperle courant ou s assurer quel emplacement est d sign non dangereux avant de remplacer lescomposants e Avant de d brancher l quipement couper le courant ou s assurer que l emplacement est d sign non dangereux e Avant de d brancher les connecteurs couper le courant ou s assurer que l emplacement est reconnu non dangereux Attacher tous connecteurs fournis par l utilisateur et reli s aux circuits externes d un appareil Allen Bradley aide de vis loquets coulissants connecteurs filet s ou autres moyens permettant aux connexions de r sister une force de s paration de 15 newtons 3 4 Ib 1 5 kg appliqu e pendant au moins une minute Le sigle CSA est la marque d pos e de l Association des Standards pour le Canada PLC est une marque d pos e de Allen Bradley Company Inc Ap
88. rce 1 3 0 Dest N7 0 MVM MASKED MOVE Source N7 0 Mask OFFF Dest 0 2 0 Note The use of the masked move instruction with the OFFF mask lets you use outputs 12 13 14 and 15 for other output devices in your system The 7 segment display uses outputs 0 11 Rung 2 2 END Data Table address 15 data 0 address 15 data 0 N10 0 0000 1001 0001 0000 9 2 Publication 1746 6 16 January 1999 Chapter 9 Application Programming Examples Supplementary Example Application Setup select display in C or F This example shows how to display the temperature of several different thermocouples at display panel A selector switch 1 2 0 lets the operator choose between displaying temperatures in C or F A second selector switch 1 2 1 lets the operator switch a display between the ambient temperature near the bath and the temperature inside the control cabinet containing the SLC controller Each display is a 4 digit 7 segment LED display with the last digit representing tenths of a degree The displays have DC sinking inputs and use a BCD data format 1746 INT4 1746 1B8 5 1746 0816 SLC 5 02 A Ambient Temperature Thermocouple Type T O Display Panel Piu Chilled H20 Pipe Cabinet JA Ambient Bath Steam Chilled Hy Ty
89. re APS to Create a new file Configure I O e Return to an existing file For additional information on applying APS refer to the User Manual for Advanced Programming Software publication 9399 APSUM If you are using a different programming software package refer to the documentation that came with your software We assume that you have already loaded APS into your computer 1 Boot your software and access this Main Menu screen 2 To create a new program file offline press OFFLINE PRG DOC F3 You see the following PROGRAM DIRECTORY FOR PROCESSORS screen 3 Press these two keys in succession CHANGE FILE F4 followed by CREATE FILE F6 You see the following processor selection screen 4 Type the name of the file you want to create and press ENTER The screen inserts the file name in the lower pop up window 5 Identify the type of processor you are using in the upper pop up window Use the cursor keys to highlight the processor and press ENTER The screen displays processor ID information in the lower pop up window 6 What you do next depends on the processor you select SLC 5 03 orlater processor the screen displays Go to step 7 and press ENTER another pop up window SLC 5 010r5 02 processor n a Go to the section Configure I O on next page 5 1 E off PROC FUNC LF Chapter 5 Accessing Files to Configure 1 0 7 Identify the processor s operating system Read
90. replaceable parts Part Part Number Replacement Terminal Block 1746 RT32 Replacement Terminal C over 1746 R13 Series B 1746 INT4 User Manual 1746 6 16 Contacting Allen Bradley If you need to contact Allen Bradley for assistance please have the following information available when you call aclear statement of the problem including a description of what the system is doing LED status and bit status of I O image words channel configuration and status for the module Publication 1746 6 16 January 1999 fault code if the SLC processor is faulted processor type and firmware FRN number from label on processor a list of things you have already tried to remedy the problem hardware types in the system including I O modules and chassis 8 5 Chapter 8 Module Diagnostics and Troubleshooting Notes 8 6 Publication 1746 6 16 January 1999 Chapter Application Programming Examples This chapter provides two application examples to help you use the module basic example supplementary example The basic example lets you display a temperature The supplementary example lets you manually select the display of temperature in C or F Basic Example Application Setup to display a temperature This example lets you display the temperature of a bath F on an LED display device The display device requires BCD data so the program must convert the temperature reading to BCD 1746 0B16 1746 INT4 Thermocou
91. replacement parts contacting Allen Bradley The module operates at two levels module level channellevel Module level operation includes functions such as power up configuration and communication with the SLC processor ON indicates the module is OK OFF indicates a fault Channel level operation includes functions such as data conversion and open circuit detection ON indicates the channel is OK Blinking indicates a fault The module performs internal diagnostics at both levels and immediately indicates detected error conditions with either of its status LEDs When a status LED is continuously ON the status is OK Module Diagnostics at Power up At module power up the module performs a series of internal diagnostic tests If the module detects a failure its module status LED remains off Channel Diagnostics When a channel is enabled the module checks for a valid configuration Then on each scan of its inputs the module checks for out of range and open circuit fault conditions of its inputs including the CJC thermistor When the module detects a failure of any channel diagnostic test it causes the channel status LED to blink and sets the corresponding channel fault bit bits 12 15 of the channel status word Channel fault bits and LEDs are self clearing when fault conditions are corrected Important If you clear the channel enable bit channel status bits are reset 8 1 Chapter 8 Module Diagnostics and
92. return to it from the main menu screen as follows 1 Publication 1746 6 16 January 1999 To return to a program file offline press OFFLINE PRG DOC F3 You see the PROGRAM DIRECTORY FOR PROCESSORS screen Get the list of existing program files by pressing CHANGE FILE F4 You see a pop up window with the list of existing program files Cursor to the file you want to open and press OFFLINE PRG DOC F1 The screen displays the name of the subject file in the header and removes the pop up window To open the file so you can write or edit your ladder logic press MONITOR FILE F8 The screen displays the ladder logic of the subject program file To edit the logic use function keys and follow the prompts as needed When finished programming press EXIT F3 If you want to save your work press SAVE F2 Then follow the prompts and use function keys as needed to save the file 5 5 Chapter 5 Accessing Files to Configure 1 0 Notes 5 6 Publication 1746 6 16 January 1999 Channel Configuration Chapter Channel Configuration Data and Status This chapter examines channel configuration and status words and explains how you use them It gives you information about how to configure a channel e check a channel s status Channel configuration words appear in the SLC controller s output image table as shown below Words 0 3 correspond to module channels 0 3 Words 4 7 are n
93. rmocouple 0 170 0 150 139 0 C 0 125 Resolution 11009C CC Q100 0 075 r 0 050 0 025 0 300 150 0 150 300 450 600 0 750 900 1050 1200 1350 1500 Temperature C A 8 Publication 1746 6 16 January 1999 Appendix Channel Configuration Worksheets Select your bit configurations Write them down at the bottom of the worksheet Use one worksheet for each channel Set these bits in the Channel Configuration Word Bit s Define To Select as ala Description TC Type J 0 0 0 TC Type K 0 0 0 Project ee ee TC Type T olo 1 0 Slot Number ____ TC Type E ojo 1 1 Channel Number __ TC Type R 0 1 0 0 TC Type S 0 1 0 1 TC Type B 0 1 1 0 TC Type N 01 11 Configure the channel for the input type connected to it 0 3 Input yp Valid inputs are thermocouples and analog input signals Type 50mV 1 0 0 0 of 50mV and 100mV You can configure the channel to 100mV 1 0 ol 1 read the cold junction CJ C temperature When reading the CJ C temperature the channel ignores the physical TC Type C 1 0 1 0 input signal TC Type D 1 0 1 1 Invalid 1 1 0 0 Invalid WAY OVI Invalid 1 1 11 0 CJ C Temp l Ll Ia j m Select the channel data format from SERE ER Engineering units EU x1 or x10 For EU x1 values are in 0 1 degrees or 0 01mV
94. rocess variable for the PID instruction In this example the value 2081 is the numeric equivalent of configuration word N10 0 for channel 0 It is configured for a type K thermocouple scaled for PID zero the signal for an open input C and channel enabled Program Rung 2 0 First Pass Bit Initialize Channel 0 S 1 MOV 1 E MOVE 15 Source N10 0 2081 Dest 0 3 0 0 Rung 2 1 Channel 0 Status I 3 4 PID PID m Control Block N11 0 Process Variable I 3 0 Control Variable N11 23 Control Block Length 23 Rung 2 2 SCL SCALE Source N11 23 Rate 10000 Offset Dest Rate and Offset values depend on your application The Destination will typically be an analog output channel For specific examples of the SCL instruction refer to the APS User Manual or Analog I O Modules User Manual Rung 2 3 JEND Data Table address 15 data 0 address 15 data 0 N10 0 0000 1000 0010 0001 numerical equivalent 2081 Publication 1746 6 16 January 1999 7 5 Chapter 7 Ladder Programming Examples Monitor Channel Status Bits address N10 0 N10 1 N10 2 Rung 2 0 Rung 2 1 Rung 2 2 Rung 2 3 Rung 2 4 Rung 2 5 This example shows how you could monitor the open circuit error bit of each channel and set an alarm bit if the module detects an open input An open circuit error can occur if a thermocouple or CJC thermistor wire breaks or becomes disconnected from the
95. roducts having the appropriate CSA markings that is Class Division 2 Groups A B C D are certified for use in other equipment where the suitability of combination that is application or use is determined by the CSA or the local inspection office having jurisdiction Important Due to the modular nature of a PLC control system the product with the highest temperature rating determines the overall temperature code rating of a PLC control system in a Class Division 2 location The temperature code rating is marked on the product label as shown Temperature code rating CLI DIV 2 GP A B C D TEMP The following warnings apply to products having CSA certification for use in hazardous locations Look for temperature code rating here ATTENTION Explosion hazard e Substitution of components may impair suitability for Class Division 2 Do notreplace components unless power has been switched off orthe area is known to be non hazardous Do notdisconnect equipment unless power has been switched off or the area is known to be non hazardous e Do not disconnect connectors unless power has been switched off or the area is known to be non hazardous Secure any user supplied connectors that mate to external circuits on an Allen Bradley product using screws sliding latches threaded connectors or other means such that any connection can withstand a 15 Newton 3 4 Ib separating force applied for a minimum
96. roducts worldwide They include logic processors power and motion control devices operator interfaces sensors and a variety of software Rockwell is one of the world s leading technology companies Worldwide representation 7 7 Argentina e Australia e Austria e Bahrain e Belgium e Brazil e Bulgaria e Canada e Chile e China PRC e Colombia e Costa Rica e Croatia e Cyprus e Czech Republic e Denmark e Ecuador e Egypt e El Salvador e Finland e France e Germany e Greece e Guatemala e Honduras e Hong Kong e Hungary e Iceland e India e Indonesia e Ireland e Israel e Italy eJ amaica eJ apan eJ ordan e Korea e Kuwait e Lebanon e Malaysia e Mexico e Netherlands e New Zealand e Norway e Pakistan e Peru e Philippines e Poland e Portugal e Puerto Rico e Qatar e Romania e Russia CIS e Saudi Arabia e Singapore e Slovakia e Slovenia e South Africa Republic e Spain e Sweden e Switzerland e Taiwan e Thailand e Turkey e United Arab Emirates e United Kingdom e United States e Uruguay e Venezuela e Yugoslavia Allen Bradley Headquarters 1201 South Second Street Milwaukee WI 53204 USA Tel 1 414 382 2000 Fax 1 414 382 4444 Publication 1746 6 16 J anuary 1999 PN955132 48 Supercedes Publication 1746 6 16 December 1997 Copyright 1999 Allen Bradley Company Inc Printed in USA
97. s relays and AC motor drives generate significant heat such as 32 point I O modules 3 5 Chapter 3 Installation and Wiring Follow these guidelines to wire your input signal cables To limit the pickup of electrical noise keep thermocouple and millivolt signal wires as far from power and load lines as possible Forhigh immunity to electrical noise use Alpha 5121 shielded twisted pair or equivalent wire for millivolt sensors or use shielded twisted pair thermocouple extension lead wire specified by the thermocouple manufacturer Using the incorrect type of thermocouple extension wire or not following the correct polarity may cause invalid readings Ground the shield drain wire at only one end of the cable The preferred location is at the I O chassis ground Figure 3 2 Refer to IEEE Std 518 Section 6 4 2 7 or contact your sensor manufacturer for additional details keep all unshielded wires as short as possible e Tighten screw terminals with care Excessive tightening can strip a screw The open circuit detector generates approximately 20 nano amperes into the thermocouple cable A total lead resistance of 25 ohms 12 5 one way will produce 0 5 UV of error Follow system grounding and wiring guidelines found in your SLC 500 Installation and Operation Manual Preparing and Wiring the Cables To prepare and connect cable leads and drain wires follow these steps Remove foil shield and drain w
98. sing Scaled for PID and Proportional Counts To provide the highest display resolution select Scaled for PID or Proportional Counts To use either one you may have to convert channel data to from Engineering Units manually or logically The following examples show you how to do this You must obtain the minimum Sz ow and maximum SyyGyH values of the temperature or millivolt range for the channel s input type and use them in your computations We present these values in the section Using Channel Data Words page 6 5 in the table Format for Channel Data Word Scaling Examples Converting Between Units Convert from Scaled for PID to Equivalent Engineering Units in C Equation Engr Units Equivalent Si ow Suigu Stow x Scaled for PID value displayed 16384 Assume type input type scaled for P ID channel data 3421 From Channel Data Word Format table Si oy 210 C and Syigy 7609C Solution Engr Units Equivalent 210 C 760 C 210 C x 3421 16384 7 46 C Convert from Engineering Units in C to Equivalent Scaled for PID Count Equation Scaled for PID Equivalent 16384 x Engineering Units desired Stow Suigu Stow Assume type J input type scaled for P ID desired channel temp 344 C From Channel Data Word Format table Si oy 210 C and Syigy 760 C Solution Scaled for PID Equivalent 16384 x 344 C 210 C 760 C 210 C 29357 Convert from Pro
99. step 0 0270 C step 0 0486 F step B 1 C step 1 F step 0 1 C step 0 1 F step 0 0928 C step 0 1670 F step 0 0232 C step 0 0417 F step N 1 C step 1 F step 0 1 C step 0 1 F step 0 0793 C step 0 1428 F step 0 0198 C step 0 0357 F step X50 mV 0 1mV step 0 1mV step 0 01mV step 0 01mV step 6 104 uV step 6 104 uV step 3 40 uV step 3 40 uV step 100 mV 0 1mV step 0 1mV step 0 01mV step 0 01mV step 13 6 uV step 13 6 uV step 3 40 uV step 3 40 uV step CJC Sensor 1 C step 1 F step 0 1 C step 0 1 F step 0 0052 C step 0 0093 F step 0 0013 C step 0 0023 F step When millivolts are selected the temperature setting is ignored Analog input data is the same for either C or F selection Publication 1746 6 16 January 1999 6 5 Chapter 6 Channel Configuration Data and Status Using Channel Status Words Channel status words are stored in the SLC controller s input image file at addresses I e 4 I e 7 where e is the slot number assigned to the module Status words 4 7 correspond to and reflect the configuration of channels 0 3 O e 0 O e 3 Whenever a channel is disabled O e x 11 0 its corresponding status word is zero This condition tells you that input data contained in the channel data word is invalid and should be ignored Important The status word from a disabled channel is always zero The status word of an enabled channel indi
100. t 3515 offline SLC 5 03 File EXAMPLE SELECT MODULE F2 Publication 1746 6 16 January 1999 2 3 Chapter 2 Quick Start L6 Set Up Channel 0 Reference Chapter 4 Determine the operating parameters for channel 0 This example shows the channel 0 configuration Preliminary word defined with all defaults 0 except for the channel enable bit 1121 Module assumed in slot 1 Operating For details on channel configuration refer to the configuration worksheet on page 2 6 Considerations Chapter 5 SLC e Had Tels g Channel t 3 amp Configuration Output Image wi pg Data and Status Input Image 8 words E 5 E uL g Address gt 9 gt je 1 a 0 1 0 Word 0 Channel 0 Configuration Word 0 ol 0 ol ol ol ol ol ol ol ol ol ol ol ol 0 0 1 1 Word1 Channel 1 Configuration Word Use Default Settings For 0 1 2 Word 2 Channel 2 Configuration Word Type J Thermocouple 0 1 3 Word 3 Channel 3 Configuration Word r a Engineering Units x 1 1 9 Data Word 0 If Open Circuit Calibration Word 5 Bit 15 1 Degrees Celsius Bi i Words 4 6 amp 7 Lol of ol of if oj of ol of ol of of ol ol of ol 0 1 7 Word 7 reserved 7 Example Settings for Channel 0 Set this bit 11 to enable channel Address 0 1 0 11 WA Program the Transfer of the Configuration Word Reference Chapter 6 Progra
101. tecting module related errors 8 B common mode voltage D conditions tested at power up 8 p configuration word 442 6 D over range error 6 B 8 factory default setting 6 examples 9 configuring a channel 6 basic application example 9 current draw 3 how to address configuration word 4 tof f how to address data word 4 B aah aa ll how to address status word 4 how to use PID instruction using alarms to indicate status 7 YA channel configuration changes 7 4 extension wire 1 Index F FSR D p full scale error D full scale range D G gain ariff D gain error D See also full scale error getting started 2 procedure 2 tools required 2 H hazardous environment classification A heat considerations 3 5 ID code 4 input channel multiplexing 1 5 input data scaling D input image See status word and data word input response to slot disabling 4 input specifications A installation 3 1 3 equipment required 2 getting started 2 L LEDs 1 b channel status indicators 1 B module status indicator 1 state tables 8 local configuration D LSe 2 p c p 8 1 8 2 e M5 MD module ID code 4 how to enter 4 module operation 1 5 multiplexing 1 multiplexor D N noise filtering 4 B normal mode rejection D P 0 open circuit 6 B 8 B defining conditional state of channel data downscale enable 214 6
102. the module returns status OK bits set one bit for each channel F Hex for all four channels Otherwise the module returns channel status bits set to zero 6 Apply 90 000 mV to the pairs of input terminals all in parallel for the channels you are calibrating Make your leads as short as possible 7 With your programming terminal enter calibration code 1004 Hex into the data table address for configuration word 5 8 Observe bits 4 7 in status word 4 If all the channels you are calibrating see 90 000 mV the module returns status OK bits set one bit for each channel F Hex for all four channels Otherwise the module returns channel status bits set to zero 9 Remove the 90 000 mV calibration voltage 10 With your programming terminal enter calibration code 1008 Hex into the data table address for configuration word 5 11 Observe bits 0 3 in status word 5 After the module burns the calibration values into its EEPROM it returns status OK bits set one bit for each channel F Hex for all four channels If the module could not complete the calibration of one or more channels it returns a zeroed status bit for that channel non F Hex returned 12 To end the calibration procedure enter calibration code 0000 Hex into the data table address for configuration word 5 with your programming terminal During thermocouple mV operation word 5 must be zero D 3 Appendix D Channel Calibration Notes D 4 Publication 1746
103. to 60 C 32 F to 140 F Storage Temperature 40 C to 85 C 40 F to 185 F Relative Humidity 5 to 95 without condensation Agency Certification CSA certified when product is marked e CSA Class Division 2 Groups A B C D certified Hazardous Locations UL listed e CE marked for all applicable directives Input Specifications Thermocouple Type C 0 C to 2317 C 32 F to 4201 F Thermocouple Type D 0 C to 2317 C 32 F to 4201 F Thermocouple Type 210 C to 760 C 346 F to 1400 F Thermocouple Type K 270 C to 1370 C 454 F to 2498 F Thermocouple Type T 270 C to 400 C 454 F to 752 F Thermocouple Type E 270 C to 1000 C 454 F to 1832 F Type of Input Selectable Thermocouple Type R 0 C to 1768 C 32 F to 3214 F Thermocouple Type S 0 C to 1768 C 32 F to 3214 F Thermocouple Type B 300 C to 1820 C 572 F to 3308 F Thermocouple Type N 14 AWG 0 C to 1300 C 32 F to 2372 F Millivolt 50 mV dc to 50 mV dc Millivolt 100 mV dc to 100 mV dc Thermocouple Linearization IPTS 68 standard NBS MN 125 NBS MN 161 Cold J unction Compensation Accuracy 1 5 C 0 C to 70 C 32 F to 158 F Input Impedance Greater than 10MQ Temperature Scale Selectable C or F and 0 1 C or 0 1 F DC Millivolt Scale Selectable 0 1 mV or 0 01 mV Open Circuit Detection Leakage Current Open Circuit Detection Selectable Upscale
104. to the module with a single File Copy i i Procedure 1 Using the memory map function create integer file N10 with four elements N10 0 through N10 3 2 Using the APS software data monitor function enter configuration parameters for all four thermocouple channels into integer file N10 address 15 data 0 address 15 data 0 N10 0 0000 1001 0001 0001 N10 1 0000 1001 0001 0001 N10 2 0000 1001 0001 0001 N10 3 0000 1001 0001 0001 Press a key or enter value N10 3 0 21 offline no forces binary data decimal addr File EXMPL CHANGE SPECIFY NEXT PREV RADIX ADDRESS FILE FILE F1 F5 F7 F8 3 Program a rung of ladder logic to copy the integer file N10 into output image file O 3 0 O 3 3 First Pass Bit Initialize NT4 S 1 COP lE COPY FILE 15 Source N10 0 Dest 0 3 0 Length 4 On power up bit 1 15 is set for the first program scan It enables the Copy instruction to load configurations into the output image file for transfer to the module in the next I O scan 7 2 Publication 1746 6 16 January 1999 Change a Channel Configuration address N10 0 N10 1 N10 2 Publication 1746 6 16 January 1999 Rung 2 0 Rung 2 1 Rung 2 2 Rung 2 3 Chapter 7 Ladder Programming Examples The following example explains how to change the channel configuration word when the channel is currently enabled Example Change the channel configuration word to read th
105. ts 8 OF oC Important For EU x1 and F 0 1 F an over range error Degrees F will occur above 3276 7 F cannot exceed 32767 counts 9 10 Unused These bits must be zero for a valid configuration Disable unused channels for faster response Channel Off 0 When set the module configures the channel and reads the anne channel input before setting bit 11 in the status word Chnl If you change the configuration word the status word must 11 Enabl reflect the change before new data is valid If you clear the nable configuration word the module clears channel and status Channel On 1 words Fora new configuration word channel data and status words remain cleared until the module sets this bit 11 in the status word 12 15 Unused Unused 0000 These bits must be zero for a valid configuration Enter Your Bit Selections gt gt 0000 For the Channel Configuration Word 2 6 Publication 1746 6 16 January 1999 Chapter Installation and Wiring This chapter tells you how to avoid electrostatic damage determine the module s chassis power requirement install the module wire signal cables to the the module s terminal block install the ferrite collar Electrostatic Damage Electrostatic discharge can damage semiconductor devices inside this module if you touch backplane connector pins Guard against electrostatic damage by observing the following precautions ATTENTION Electrostatic discharge can degrade performance or cause
106. tures above 500C Type K thermocouples may be used at liquid hydrogen temperatures However their Seebeck coefficient about 4uV K at 20K is only about one half of that of E thermocouples Furthermore the thermoelectric homogeneity of KN thermoelements is generally not quite as good as that of EN thermoelements Both the KP and the KN thermoelements do have a relatively low thermal conductivity and good resistance to corrosion in moist atmospheres at low temperatures Type K thermocouples are recommended by the ASTM 1970 for continuous use at temperatures within the range 250 to 1260C in oxidizing or inert atmospheres Both the KP and the KN thermoelements are subject to oxidation when used in air above about 850C but even so Type K thermocouples may be used at temperatures up to about 1350C for short periods with only small changes in calibration They should not be used in sulfurous reducing or alternately reducing and oxidizing atmospheres unless suitably protected with protecting tubes They should not be used in vacuum at high temperatures for extended times because the Chromium in the positive thermoelement vaporizes out of solution and alters the calibration They should also no be used in atmospheres that promote green rot corrosion those with low but not negligible oxygen content ASTM Standard E230 72 in the Annual Book of ASTM Standards 1972 specifies that the standard limits of error for Type K comm
107. tus Calibration OK status bits 1 OK for channels 3 2 1 0 at completion callar Channel status words 6 and 7 display CALA during calibration Reads F Hex if all four channels are OK D 2 Publication 1746 6 16 January 1999 Publication 1746 6 16 January 1999 Appendix D Channel Calibration Calibration Procedure To perform this calibration procedure you will need a precision dc voltmeter and precision power supply that can display and maintain a calibration voltage to 1 1000 of a millivolt at 0 000 mV and 90 000 mV Prepare for calibration by removing the thermocouple leads from the input terminals of the channels that you want to calibrate Switch the SLC processor to run mode so it can execute the calibration ladder logic For convenience we suggest that you calibrate all four channels at the same time 1 With your programming terminal enter calibration code 1001 Hex into the data table address for configuration word 5 2 Observe status words 0 3 6 and 7 The module returns the code CAL4 Hex in status words 6 and 7 It also clears channel data words 0 3 3 Short circuit the pairs of input terminals for the channels you want to calibrate Make the jumper as short as possible 4 With your programming terminal enter calibration code 1002 Hex into the data table address for configuration word 5 5 Observe bits 0 3 in status word 4 If all the channels you are calibrating see zero voltage
108. tyle P rogrammable Controllers A procedural manual for technical personnel who use APS to Allen Bradley Advanced Programming Software 9399 APSUM develop control applications APS User Manual A reference manual that contains status file data instruction Allen Bradley Advanced Programming Software 1741 615 set and troubleshooting information about AP S APS Reference Manual An introduction to APS for first time users containing basic concepts but focusing on simple tasks and exercises and Getting Started Guide for APS 9399 APSQS allowing the reader to begin programming in the shortest time possible A training and quick reference guide to APS SLC 500 Software Programmer s Quick Reference Guide available on PASSPORT at a list price of 50 00 ABT 1747 TSG001 A procedural and reference manual for technical personnel who use an HHT to develop control applications Allen Bradley Hand Held Terminal User Manual 1747 NP 002 An introduction to HHT for first time users containing basic concepts but focusing on simple tasks and exercises and allowing the reader to begin programming in the shortest time Gening ered Oude TOMMA nan possible A resource manual and user s guide containing information i about the analog modules used in your SLC 500 system SLC 500 Analog I O Modules User Manual 1746 NM003 Published by the An article on wire sizes and types for grounding electrical National Electrical Code R
109. ull scale PP Em Upscale s Downscale to force channel data word to low scale Nos D 10 Important A bit selection or 1 1 is invalid ode ownscate For an open CJ C thermistor mV channels are not affected 7 Important The module reguires 500 msec or one module Invalid 11 update to flag the error while it ramps the channel input Units Degrees C 0 Select C F for thermal inputs Ignored for mV inputs 8 OF oC Important For EU x1 and F 0 1 F an over range error Degrees F 1 will occur above 3276 7 F cannot exceed 32767 counts 9 10 Unused Unused 0 0 These bits must be zero for a valid configuration Disable unused channels for faster response Channel Off 0 When set the module configures the channel and reads the anne channel input before setting bit 11 in the status word Chnl If you change the configuration word the status word must 11 Enabl reflect the change before new data is valid If you clear the nable configuration word the module clears channel and status words Fora new configuration word channel data an Channel On 1 ds F configurati d channel data and status words remain cleared until the module sets this bit 11 in the status word 12 15 Unused Unused 0000 These bits must be zero for a valid configuration Enter Your Bit Selections gt gt 0000 For the Channel Configuration Word B 4 Publication 1746 6 16 January 1999 J Type Thermocouple Publication 1746 6 16
110. ut signal Frequency Response of the 8 Hz Filter Step Response worst case for Filter Multiplexer and A D Converter 3 gg 00 db i ES iE 90 25db 80 0 1 YA Multiplex CJC Values A D Conversion Atten 50db hof T 200 ms i 200 ms uation Final 50 i Value 40 75db 30 2096 i 1096 i i 100db 1 5 10 50 100 0 60 120 180 240 300 360 420 480 540 600 Time ms Frequency Hz The following table summarizes the input channel characteristics Corner Frequency 50 60 Hz NMR Filter Time Update Time Step Response worst 8 Hz 50 60 dB 180 ms 400 ms 600 ms Effective Resolution of a Channel and Input Device The effective resolution of an input channel depends upon the type of input device connected to it For thermocouples we define resolution as the smallest increment of temperature that can be sampled after A D conversion It varies with temperature and with the type of thermocouple We present a Publication 1746 6 16 January 1999 4 5 Chapter 4 Preliminary Operating Considerations resolution graph for each type of thermocouple in Appendix A Module Specifications Millivolt devices are generally considered linear and the effective resolution is that of the channel itself Type of Device Resolution 0 05 C 0 75 C 300 C depending on the thermocouple millivolt sensor 3 4uV bit thermocouple 4 6 Publication 1
111. voltage common to its input terminals relative to ground CMRR 20 Logio V1 V2 common mode voltage A voltage signal induced in conductors with respect to ground 0 potential configuration word Contains the channel configuration information needed by the module to configure and operate each channel The module is designed for software rather than hardware configuration cut off frequency The frequency at which the input signal is attenuated 3dB by the digital input filter Frequency components of the input signal below the cut off frequency are passed with under 3dB of attenuation dB decibel A logarithmic measure of the ratio of two signal levels data word A 16 bit integer that represents the value of the analog input channel The channel data word is valid only when the channel is enabled and there are no channel errors When the channel is disabled the channel data word is cleared 0 digital filter A low pass filter of the A D converter The digital filter provides high frequency noise rejection E 1 Appendix E Terms and Abbreviations E 2 effective resolution The number of bits in the channel data word used to represent useful information full scale error gain error The difference in slope between the actual and ideal analog thermocouple transfer functions full scale range FSR The difference between the maximum and minimum specified analog thermocouple input values ga
112. word for equality examine channel status bits to see if the module flagged a fault condition autocalibrate a channel by cycling the channel enable bit on and off During the I O scan the SLC processor scans configuration words from its output image file to the module and scans data and status words from the module to its input image file The SLC processor scans its I O following each program scan Chapter 7 Ladder Programming Examples We repeat the configuration word because it is used often in the examples Configuration Word 15 14 13 12 11 10 9 8 1 6 5 4 3 2 1 0 Not Used Channel Not Used Temp Responseto Data Type Enable Units Open Circuit Format of Input 0 Disable 0 9C 00 zero 00 EUxl 0000 Type 0110 TypeB 1 Enable le 0 1 FS 0 1 EU x10 0001 TypeK 0111 TypeN 10 LS 10 ScaledPID 0010 TypeT 1000 50mV 1 1 PropCounts 0011 TypeE 1001 100 mV Example Configuration Word with These Parameters i i i ae a i i i Type 5 channel enabled C zero for open circuit EU x10 Type K thermocouple Type sue 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 Load Channel C onfigurations This example shows you how to set configuration bits and transfer configuration r transrer e Module ata of all four channels to the module with a single File Copy instruction for Transfer to the Modul data of all four channels
113. yourself of electric charge by touching a grounded object e Avoid touching connector terminations and circuit components e When not in use keep the module in its electrostatic shielded bag Unpack the module making sure that the contents include e module Catalog Number 1746 INT4 e removable terminal block factory installed on module with CJ C sensors attached e this user manual publication number 1746 6 16 If the contents are incomplete call your local Allen Bradley representative for assistance Lg Review Power Requirements Reference Chapter 3 Review the power requirements of the modules drawing power from the chassis power supply Installation and e The fixed 2 slot chassis supports 2 1746 INT4 modules If combining an INT4 module with Wiring a different type of module refer to Considerations for a Fixed Controller in chapter 3 Appendix A e Fora modular system compute the total load on the system power supply using the Shucifcations procedure described in the SLC Installation amp Operation Manual for Modular Controllers publication 1747 6 2 or the SLC 500 Family System Overview publication 1747 2 30 Install the Module Reference Chapter 3 ATTENTION Never install remove or wire Installation and A modules with power applied to the chassis or Wiring devices wired to the module Make sure system power is off then insert the the module into the 1 0 chassis In this example procedure the module
114. ze the cabinet pilot light on the panel Publication 1746 6 16 January 1999 Cabinet Light MEO 0 7 0 MASKED EQUAL C Source I 1 4 1 Mask FEFF Compare N10 9 9 7 Chapter 9 Application Programming Examples Rung 2 8 Convert data words to BCD format and send them to the LED displays Write Ambient or Cabinet Temperature to the Display TOD TO BCD Source I 1 0 Dest 0 3 0 Rung 2 9 Write Bath Temperature to tthe Display TOD TO BCD Source I 1 1 Dest 0 4 0 Rung 2 10 Write Steam Temperature to the Display TOD TO BCD Source I 1 2 Dest 0 5 0 Rung 2 11 Write Chilled Temperature to the Display TOD TO BCD Source I 1 3 Dest 0 6 0 Rung 2 12 END Data Table address 15 data 0 address 15 data 0 N10 0 0000 1101 0000 0010 N10 5 0000 1100 0000 0000 N10 1 0000 1101 0000 0000 N10 6 0000 1100 0000 0001 N10 2 0000 1101 0000 0001 N10 7 0000 1100 0000 0000 N10 3 0000 1101 0000 0000 N10 8 0000 1101 0000 1111 N10 4 0000 1100 0000 0010 N10 9 0000 1100 0000 1111 Publication 1746 6 16 January 1999 Electrical Specifications Physical Specifications Publication 1746 6 16 January 1999 Appendix Module Specifications This appendix lists the specifications for the 1746 INT4 Thermocouple mV Isolated Input Module Backplane Current Consumption 110 mA at5 VDC 85 mA at 24 VD

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