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1746-UM008B-EN-P, SLC 500 RTD/Resistance Input Module User

1. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit Number 0 0 0 0 1 1 0 0 0 0 0 0 1 0 1 1 ChannelO Ambient 0 0 0 0 1 1 0 0 0 0 0 0 0 01 0 q Channel 1 Bath 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 1 Channel2 Steam 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 1 Channel3 Chilled H50 A A A A A Input Type Select Data Format Select Broken Input Select Temperature Units Select Filter Frequency Select Channel Enable Excitation Current Select Scaling Select Not Used 0000 100 Q Pt 385 0110 500 Q Pt 3916 0001 200 Q Pt 385 0111 1000 OPC 3916 1100 150 Q Potentiometer Bits inout Type Selected 0010 500 Q Pt 385 1000 10 Q Cu 426 1001 500 Q Potentiometer 0 3 puk yA 0011 1000 Q Pt 385 1001 120 QNi 618 2 1110 1000 QPotentiometer 0100 100 Q Pt 3916 1010 120 QNi 617 1111 3000 Potentiometer 0101 200 Q Pt 3916 1011 604 QNi Fe 518 Bits 4 Data Format Select 00 engineering units x 19 10 scaled for PID 0 to 16383 and 5 01 engineering units x10 4 11 proportional counts 32768 to 432767 s Broken Input Select 00 zero 01 upscale 10 downscale 11 invalid Bits 8 Temperature Units 0 degrees Celsius 1 degrees Fahrenheit Select Bits s filer Preguen Gog ds 01 50 Hz 10 60 Hz 11 250 Hz and 10 Select Bit 11 Channel Enable 0 channel disable
2. lglxi d 1 1 1 1 HE INIEQ O S E Radix Binary z Symbol Columns 16 7 N10 2 Properties Usage Help Interface to the PID The RTD module was designed to interface directly to the SLC 5 02 Instruction SLC 5 03 SLC 5 04 and SLC 5 05 PID instruction without the need for an intermediate scale operation Use RTD channel data as the process variable in the PID instruction Use this procedure to program this application 1 Select 100 Q Platinum RTD 0 003916 as the input type by setting bit O 0 bit 1 0 bit 2 1 and bit 3 0 in the configuration word 2 Select scaled for PID as the data type by setting bit 4 0 and bit 5 1 in the configuration word When using the module s scaled for PID data format with the SLC PID function verify that the PID instruction parameters Maximum Scaled Smax word 8 and Minimum Scaled Spin word 8 match the module s minimum and maximum scaled range in engineering units 200 850 C 328 1562 F for that channel This allows you to accurately enter the setpoint in engineering units C F Publication 1746 UMO008B EN P December 2006 94 Ladder Programming Examples Rung 2 0 First Pass Bit Initialize NR4 Channel 0 S 1 MOV 1 E MOVE 15 Source N10 0 Dest 0 3 0 Entering address N11 0 allocates elements N11 0 to N11 22 for required R Ch Control Blo
3. dB decibel A logarithmic measure of the ratio of two signal levels digital filter A low pass noise filter incorporated into the A D converter In addition the digital filter provides high rejection notches at frequencies that are integral multiples of the filter cut off frequency The notches are used for rejecting AC power line noise and higher frequency noise excitation current A user selectable current 0 5 mA and 2 0 mA that the module sends through the RTD or resistive device to produce an analog signal which the NR4 can process and convert to temperature or to ohms respectively effective resolution The amount of jitter data variation that typically occurs in the data word due to the influence of the internal electrical noise in the module filter frequency The user selectable first notch frequency for the A D converter s digital filter The digital filter provides AC power line noise rejection when the first notch is at 10 Hz or at the power line frequency full scale error gain error The difference in slope between the actual and ideal potentiometer or RTD transfer functions Glossary 137 full scale range FSR The difference between the maximum and minimum specified analog RTD or resistive input values gain drift The change in full scale transition voltage measured over the operating temperature range of the module input data scaling The data formats that you select to define the logi
4. Belden 9533 or equivalent Three wire greater than 30 48 m 100 ft or high humidity conditions Belden 83503 or equivalent Install and Wire the Module n For a three wire configuration the module can compensate for a maximum cable length associated with an overall cable impedance of 25 ohms IMPORTANT Details of cable specifications are shown on page 122 As shown in RTD Connections to Terminal Block on page 42 three configurations of RTDs can be connected to the RTD module namely e two wire RTD which is composed of two RTD lead wires RTD and Return e three wire RTD which is composed of a Sense and two RTD lead wires RTD and Return e four wire RTD which is composed of two Sense and two RTD lead wires RTD and Return The second sense wire of a four wire RTD is left open It does not matter which sense wire is left open IMPORTANT The RTD module requires three wires to compensate for lead resistance error It is recommended that you do not use two wire RTDs if long cable runs are required as it will reduce the accuracy of the system However if a two wire configuration is required reduce the effect of the lead wire resistance by using a lower gauge wire for the cable for example use 1 291 mm 16 AWG instead of 0 511 mm 24 AWG Also use cable that has a lower resistance per foot of wire The module s terminal block accepts two 2 5 mm 14 AWG gauge wires e To limit overall ca
5. Reproduction of the contents of this manual in whole or in part without written permission of Rockwell Automation Inc is prohibited Throughout this manual when necessary we use notes to make you aware of safety considerations Identifies information about practices or circumstances that can cause an explosion in a hazardous environment which may lead to personal injury or death property damage or economic loss IMPORTANT Identifies information that is critical for successful application and understanding of the product Identifies information about practices or circumstances that can lead to personal injury or death property damage or economic loss Attentions help you identify a hazard avoid a hazard and recognize the consequence ATTENTION SIA a vay Labels may be on or inside the equipment for example a drive or motor to alert people that dangerous voltage may be present PDT vai Labels may be on or inside the equipment for example a drive or motor to alert people that surfaces may be dangerous temperatures PPP Rockwell Automation Allen Bradley TechConnect ControlLogix RSLogix 500 and RSLinx are trademarks of Rockwell Automation Inc Trademarks not belonging to Rockwell Automation are property of their respective companies New Information Summary of Changes The information below summarizes the changes to this manual since the last revision The table below lists secti
6. LED indicators 17 channel status 17 20 module status 17 20 LSB 137 module accuracy 119 module ID code 51 how to enter 51 module operation 19 module to processor communication channel configuration word 21 channel data word 22 channel limit words 22 channel status word 22 multiplexer 137 multiplexing 19 noise filtering 54 normal mode rejection 137 0 open circuit 103 error condition 103 out of range error 103 bit description in status word 86 over range error fault bit 86 under range error 86 fault bit 86 output image 52 over range error 86 fault indicator bit 86 P PID input type 68 PID instruction 93 application example 93 programming 93 pinout diagram 40 potentiometer 122 137 2 wire pot interconnection 44 3 wire pot interconnection 45 accuracy 122 ohmic values 122 power requirements 34 repeatability 122 resolution 122 wiring diagram 44 45 wiring inputs 42 programming 87 configuration settings initial settings 88 making changes 88 PID instruction 93 verifying channel configuration changes 92 proportional counts data format 95 application example 95 programming 95 proportional counts input 68 remote configuration 138 removing the module 38 removing the terminal block 38 resistance device types 122 ohmic values 122 potentiometer 122 resolution 138 routing of wires 40 RTD accuracy 14 compatibility 16 definition 138 excitation current 13 temperature drift 16 temperature ranges 119 th
7. 1 Channel 0 Status Channel 0 Flag Channel 0 Enable I 3 4 B3 0 3 0 1 t L 11 1 11 Channel 0 Flag B3 U 1 IMPORTANT The RTD module responds to processor commands much more Publication 1746 UM008B EN P December 2006 frequently than it updates its own LED indicators Therefore it is normal to execute these two rungs and have the RTD module perform an autocalibration of channel 0 without the channel 0 LED indicator ever changing state Introduction Module Operation vs Channel Operation Chapter Module Diagnostics and Troubleshooting This chapter describes troubleshooting using the channel status LED indicators as well as the module status LED indicator A troubleshooting flowchart is shown on page 105 The flowchart explains the types of conditions that might cause an error to be reported and gives suggestions on how to resolve the problem Major topics include the following Module operation vs channel operation e Power up diagnostics Channel diagnostics e LED indicators e Troubleshooting flowchart e Replacement parts e Contacting Rockwell Automation The RTD module performs operations at two levels e Module level operations e Channel level operations Module level operations include functions such as power up configuration and communication with the SLC processor Channel level operations describe channel related functions such as data conversion and open circuit or short ci
8. On Off On Module is disabled while you cycle module power 2 Channel status LED indicator is ON if the respective channel is enabled and OFF if the channel is disabled Module to Processor Communication The RTD module communicates with the SLC processor through the backplane of the chassis The RTD module transfers data to and receives data from the processor by means of an image table The image table consists of eight input words and eight output words Data transmitted from the module to the processor is called the input image for example Channel Data Words and Channel Status Words Conversely data transmitted from the processor to the module is called the output image for example Channel Configuration Words and Scaling Limit Words Details about the input and output images are found in Module Addressing on page 52 and 53 Communication Flow Channel Data Words Channel Status Words RTD 5 1746 NR4 resistance Input SLC 500 ed Module Scaling Limit Words Processor Signals Channel Configuration Words Publication 1746 UMO008B EN P December 2006 22 Overview Publication 1746 UM008B EN P December 2006 Image Table Input Image Function Output Function Word Image Word 0 Channel 0 data 0 Channel 0 configuration 1 Channel 1 data 1 Channel 1 configuration 2 Channel 2 data 2 Channel 2 configuration 3 Channel 3 data 3 Channel
9. 0 4 F 0 5 F 200 QPt RTD 3916 1 0 1 C 0 2 C 0 3 C 0 3 C 0 2 F 0 4 F 0 5 F 0 5 F 500 QPt RTD 3916 1 0 1 C 0 2 C 0 2 C 0 3 C 0 2 F 0 4 F 0 4 F 0 5 F 1000 QPt RTD 3916 0 1 C 30 2 C 30 2 C 0 3 C 0 2 F 0 4 F 0 4 F 0 5 F 10 OG Cu RTD 42612 30 2 C 0 3 C 0 3 C 0 4 C 0 4 F 0 5 F 0 5 F 0 7 F 120 QNi RTD 618113 30 1 C 30 1 C 30 1 C 0 2 C 0 2 F 0 2 F 0 2 F 0 4 F 120 QNi RTD 672 0 1 C 30 1 C 30 1 C 0 3 C 0 2 F 0 2 F 0 2 F 0 5 F 604 QNiFe RTD 518 30 1 C 30 1 C 30 1 C 0 2 C 0 2 F 0 2 F 0 2 F 0 4 F 150 QResistance Input 0 02 Q 0 04 Q 0 04 Q 0 08 Q 500 QResistance Input 0 1 Q 40 2 Q 40 2 Q 0 4 Q 1000 Q Resistance Input 0 2 Q 40 3 Q 20 3 Q 0 5 Q 3000 Q Resistance Input 0 2 Q 40 3 Q 40 3 Q 0 5 Q f The digits following the RTD type represent the temperature coefficient of resistance p which is defined as the resistance change per ohm per C For instance Platinum 385 refers to a platinum RTD with p 0 00385 ohms ohm xC or simply 0 00385 C 2 Actual value at 0 C 32 F is 9 042 Qper SAMA standard RC21 4 1966 Gl Actual value at 0 C 32 F is 100 Qper DIN standard Publication 1746 UMO008B EN P December 2006 56 Preliminary Operating Considerations Publicat
10. Channel 0 Configuration Word ol o ol ol ol of olol ol ol ol ol ol of ol o 0 1 1 Word 1 Channel 1 Configuration Word Bit 15 Bit 0 i 5 n to 0 1 2 Word2 Channel 2 Configura S Ward Scaling Select bits apply to proportional counts mode 0 1 3 Word3 Channel 3 Configuration Word Limit Scale W ords are only used if scaling select 010r 0 1 4 Word4 User set Lower Scale Limit Range 0 x 10 and data format 11 0 1 5 Word 5 User set Upper Scale Limit Range 0 mo 0 1 6 Word6 User set Lower Scale Limit Range 1 PA lt 0 17 Word 7 User set Upper Scale Limit Range 1 P a LR Ings E x 1 100Platinum R TD 385 L4 a Engineering Units x 1 0 1 step L Broken Input set data word to zero P d E Degrees Celsius C Pa 10Hz Filter Frequency LI LI L I LI LI LI LI L 1 I LI LI I Bit 15 Bit 0 0j 0 0j 0 1 0 0 0j 0j 0 0 0 0 O 0 0 i New Setting his bit 11 to enable channel Address 0 1 0 11 Se Publication 1746 UM008B EN P December 2006 30 Quick Start Guide Program the Configuration Follow these steps to complete the programming necessary to establish the new configuration word setting in the previous step 1 3 Create integer file N10 using the memory map function Integer file N10 should contain one element for each channel used For this example we only need one N10 0 Enter the configurat
11. Excitation Current Engineering Units x 1 Engineering Units x 10 Proportional Counts Scaled for PID Defaults 0 1 C 0 1 F 1 0 C 1 0 F 0 5 mA not allowed 2 0 mA 1000 2600 1480 5000 100 260 148 500 0 16 383 32 768 32 767 1 Actual value at 0 C 32 F is 9 042 Qper SAMA standard RC21 4 1966 The Data Format for 150 Q Resistance Input table the Data Format for 500 Q Resistance Input table and the Data Format for 3000 Q Resistance Input table show the resistance ranges provided by the 1746 NR4 Data Format for 150 Resistance Input Resistance Input Type Data Format Engineering Units x 1 Engineering Units x 10 0 1 A 1 0 Q Scaled for PID Proportional Counts Defaults 150 Q 0 15 000 0 1500 1 When ohms are selected the temperature units selection bit 8 is ignored Data Format for 500 Resistance Input Resistance Input Type 0 16 383 Data Format 32 768 32 767 Engineering Units x 1 Engineering Units x 10 Proportional Counts Scaled for PID Defaults 0 1 A 1 0 Q 500 Q 0 30 000 0 3000 0 16 383 32 768 32 767 1000 Q 0 19 000 0 1900 0 16 383 32 768 32 767 1 When ohms are selected the temperature units selection bit 8 is Data Format for 3000 O Resistance Input Excitation Current ignored Data Format Engineering Units x 1 Engineering Units x 10
12. Proportional Counts Scaled for PID Defaults 0 1 Q 1 0 Q1 0 5 mA 0 30 000 0 3000 0 16 383 32 68 32 767 2 0 mA 0 19 000 0 1900 0 16 383 32 68 32 767 1 When ohms are selected the temperature units selection bit 8 is ignored Publication 1746 UMO008B EN P December 2006 74 Channel Configuration Data and Status The Channel Data Word Resolution for RTDs table shows the data resolution provided by the 1746 NR4 for RTD input types using the various data formats Channel Data Word Resolution for RTDs Data Format Bits 4 and 5j RTD Input Type Engineering Units x 1 miii Units Scaled for PID diu b F C oF C F E F 100 Platinum 385 0 1 C step 0 1 F step 1 C step 1 F step 0 0641 C step 0 1154 F step 0 0160 C step 0 0288 F step 200 QPlatinum 385 0 1 C step 0 1 F step 1 C step 1 F step 0 0641 C step 0 1154 F step 0 0160 C step 0 0288 F step 500 QPlatinum 385 0 1 C step 0 1 F step 1 C step 1 F step 0 0641 C step 0 1154 F step 0 0160 C step 0 0288 F step 1000 Platinum 385 0 1 C step 0 1 F step 1 C step 1 F step 0 0641 C step 0 1154 F step 0 0160 C step 0 0288 F step 100 Platinum 3916 0 1 C step 0 1 F step 1 C step 1 F step 0 0507 C step 0 0912
13. removable terminal block The terminal pin out is shown in RTD Connections to Terminal Block on page 42 ATTENTION Terminal Block Shield T Disconnect power to the SLC before attempting to install remove or wire the removable terminal wiring block To avoid cracking the removable terminal block alternate the removal of the terminal block release screws Release Screw Max Torque SM 06 Nm 5 3 in bs EX Shield Channel ORTD O Channel 0 Sense lt x Channel 1 RTD Channel 0 Return le Channel 1 Sense Shield Re Channel 1 Return Channel 2 RTD NN Shield Channel 2 Return lt x Channel 3 Sense Channel 2 Sense l9 Shield Orma Channel 3 Return mn SM s SM 3 Channel 3 RTD I Shield Release Screw HEEL Max Torque 0 6 Nm 5 3 in bs NR4 Wiring Considerations Follow the guidelines below when planning your system wiring Since the operating principle of the RTD module is based on the measurement of resistance take special care in selecting your input cable For 2 wire or 3 wire configuration select a cable that has a consistent impedance throughout its entire length Cable Selection Configuration Recommended Cable Two wire Belden 9501 or equivalent Three wire less than 30 48 m 100 ft
14. 2 input word 6 of the RTD module located in slot 3 in the SLC chassis use address 3 6 Slot File Type Word 23 5 Element Delimiter Word Delimiter Publication 1746 UMO008B EN P December 2006 54 Preliminary Operating Considerations Chapter 5 Channel Configuration Data and Status gives you detailed bit information about the content of the data word and the status word The RTD module uses a digital filter that provides noise rejection for the input signals The digital filter is programmable allowing you to select from four filter frequencies for each channel The digital filter provides the highest noise rejection at the selected filter frequency Selecting a low value for example 10 H2 for the channel filter frequency provides greater noise rejection for a channel but also increases the channel update time Selecting a high value for the channel filter frequency provides lesser noise rejection but decreases the channel update time Channel Filter Frequency Selection The Notch Frequencies table shows the available filter frequencies as well as the associated minimum normal mode rejection NMR cut off frequency and step response for each filter frequency The figures on pages 56 and 57 show the input channel frequency response for each filter frequency selection Channel Step Response The channel filter frequency determines the channel s step response The step response is the time required for t
15. 3 C 0 010 C C 0 010 C C ickel Iron 518 0 5 F 40 5 F 0 018 F F 20 018 F F 1 The digits following the RTD type represent the temperature coefficient of resistance eJ which is defined as the resistance change per ohm per C For instance Platinum 385 refers to a platinum RTD with lt 0 00385 ohms ohm C or simply 0 00385 C To maximize the relatively smal 7 Actual value at 0 C 32 F is 9 042 Qper SAMA standard RC21 4 1966 3 Actual value at 0 C 32 F is 100 OQ per DIN standard Temperature drift specifications apply to a module that has not been calibrated The accuracy values assume that the module was calibrated within the specified temperature range of 0 60 C 32 140 F RTD signal only 2 mA excitation current is allowed When you are using 100 Q or 200 Q platinum RTDs with 0 5 mA excitation current refer to the following important note about module accuracy IMPORTANT Module accuracy using 100 Qor 200 Q platinum RTDs with 0 5 mA excitation current depends on the following criteria e Module accuracy is 0 6 C after you apply power to the module or perform an autocalibration at 25 C 77 F ambient with module operating temperature at 25 C 77 F Module accuracy is 0 6 C DT 0 034 C C after you apply power to the module or perform an autocalibration at 25 C 77 F ambient with the module operating temperature betwe
16. 60 C 140 F ambient with module operating temperature at 60 C 140 F Publication 1746 UMO008B EN P December 2006 16 Overview Resistance Device Compatibility The following table lists the resistance input types you can use with the RTD module and gives each type s associated specifications Resistance Input Specifications Input Type Resistance Range Resistance Range Accuracy Temperature Resolution Repeatability 0 5 mA excitation 2 0 mA excitation Drift 150A 0 150A 0 150 A 2 3 0 01A x 0 04 A 500A 0 500A 0 500 A x0 5A x0 014 A C 0 01A x0 2 A x 0 025 A F Resistance f 1000 A 0 1000 A 0 1000 A x1 0A x0 029 A C 0 01A x0 2A x 0 052 A F 3000 A 0 3000 A 0 1900 A X1 5A x 0 043 A C 0 01A x0 2 A x 0 077 A F f The accuracy values assume that the module was calibrated within the specified temperature range of 0 60 C 32 140 F 2 The accuracy for 150 Qis dependant on the excitation current x 0 2 Qat 0 5 mA x 0 15 Qat 2 0 mA The temperature drift for 150 Qis dependant on the excitation current x 0 006 C at 0 5 mA x 0 0040 at 2 0 mA Hardware Overview The RTD module fits into a single slot of an SLC 500 chassis e Modular system except the processor slot 0 e Fixed system expansion chassis 1746 A2 The module uses eight input words and eight output words If the RTD module resides in a remote configur
17. Channel Configuration Worksheet With Settings Established for Channel 0 The Device Configuration diagram indicates the temperature of a bath on an LED display The display requires binary coded decimal BCD data so the program must convert the temperature reading from the RTD module to BCD before sending it to the display This application displays the temperature in F Device Configuration 1746 0B16 1746 NR4 200 QPlatinum RTD Unit oooo Bath LED Display XS DC Sinking Inputs BCD Format Publication 1746 UMO008B EN P December 2006 108 Application Examples Channel Configuration Configure the RTD channel with the following setup e 200 Q Platinum RTD e F in whole degrees e Zero data word in the event of an open or short circuit e 10 Hz input filter e 2 0 mA excitation current Channel Configuration Worksheet With Settings Established for Channel 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 01 Bit Number 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 Channel 0 Channel 1 0 Channel 2 0 Channel 3 A A A A A L nput Type Select Data Format select Broken Input Select Temperature Units Select Filter Frequency Select Channel Enable Excitation Current Select Scaling Select Not Used Publicat
18. E dS 96 Invoke Autocalibration uoa sete O3 P pepe se Fre eg 97 Chapter 7 TI MEO CUCU OM os cet E set ne eS te od wi dois Pis Qe 99 Module Operation vs Channel Operation 99 Power Turn on Diagnostics sex ri v Goo PTE Ee 100 Channel Diagnostics sete ate qr eode Aen 100 LED Indicators avv vicies Sangh the RC ode eoi to Se d 100 Error COUES Nos aie Dales aku DEO Qu D NI N EDEA qued 102 Replacement Parts o eds wel o ena tion E eg ane er diee et 106 Contact Rockwell Automatioti J 23 epus orbes E 106 Chapter 8 Basie Example nasci aos gcc hoe Acad e redd e dt 107 Supplementary Example sa vor PIYESERTERC ES SS 111 Appendix A MOU ACGUTACY ao dra eT acest ce eee bte er ee Et 14 119 Appendix B dus te wd eode e eee ae t orte ti Pod Redes teg e pt aee ete 123 Appendix C Channel Configuration Procedure soupe EERCPEN S 125 Appendix D EEUU DEI ce Scot ah es Ae Ree wearers ead gee Se 131 Glossary Index Preface Use This Manual Read this preface to familiarize yourself with the rest of the manual This preface covers the following topics e Who should use this manual e Purpose of this manual e Terms and abbreviations e Conventions used in this manual e Allen Bradley support Who Should Use This Use this manual if you are responsible for designing installing M programming or troubleshooting control systems that use anua Allen Bradley small logic controllers You should have a basic understanding of SLC 500 prod
19. F 0 4 F f 1 120Q 80 260 C 80 260 C 0 1 C 0 2 C Nickel 672 112 500 F 112 500 F 0 2 F 0 4 F 1 604 Q 100 200 C 100 200 C 0 1 C 0 2 C Nickel Iron 518 148 392 F 148 392 F 0 2 F 20 4 F 1 The digits following the RTD type represent the temperature coefficient of resistance ed which is defined as the resistance change per ohm per C For instance Platinum 385 refers to a platinum RTD with 0 00385 ohms ohm C or simply 0 00385 C RTD Accuracy and Temperature Drift Specification 3 Actual value at 0 C 32 F is 100 Q per DIN standard 7 Actual value at 0 C 32 F is 9 042 Qper SAMA standard RC21 4 1966 The temperature range for the 1000 QRTD is dependant on the excitation current To maximize the relatively small RTD signal only 2 mA excitation current is allowed IMPORTANT configuring the module The exact signal range valid for each input type is dependent upon the excitation current magnitude that you select when For details on excitation current refer to page 119 Accuracy Accuracy Temperature Drift Temperature Drift RTD Type 0 5 mA Excitation 2 0 mA Excitation 0 5 mA Excitation 2 0 mA Excitation 100 Q 1 0 C 0 5 C 0 034 C C 0 014 C C 2 0 F 0 9 F 0 061 F F 0 025 F F 200 Q 1 0 C 0 5 C 0 034 C C 0 01
20. F step 0 0127 C step 0 0288 F step 200 Platinum 3916 0 1 C step 0 1 F step 1 C step 1 F step 0 0507 C step 0 0912 F step 0 0127 C step 0 0288 F step 500 Platinum 3916 0 1 C step 0 1 F step 1 C step 1 F step 0 0507 C step 0 0912 F step 0 0127 C step 0 0288 F step 1000 2Platinum 3916 0 1 C step 0 1 F step 1 C step 1 F step 0 0507 C step 0 0912 F step 0 0127 C step 0 0288 F step 10 QCopper 426 0 1 C step 0 1 F step 1 C step 1 F step 0 0220 C step 0 0396 F step 0 0051 C step 0 0099 F step 120 QNickel 6182 0 1 C step 0 1 F step 1 C step 1 F step 0 0220 C step 0 0396 F step 0 0051 C step 0 0099 F step 120 Q Nickel 672 0 1 C step 0 1 F step 1 C step 1 F step 0 0208 C step 0 0374 F step 0 0052 C step 0 0093 F step 604 Q Nickel Iron 518 0 1 C step 0 1 F step 1 C step 1 F step 0 0183 C step 0 0330 F step 0 0046 C step 0 0082 F step When ohms are selected the temperature units selection bit 8 is ignored Analog input data is the same for either C or F selection 7 Actual value at 0 C 32 F is 100 per DIN standard The Channel Data Word Resolution for 150 Resistance Input table and the Channel Data Word Resolution for 500 Q 1000 Q and 3000 Q Resistance Inputs table shows the data resolution provided by the 1746 NR
21. Input Sj gy 0 Qand Syigy 3000 Q Solution Proportional Counts Equivalent 65536 x 1809 Q 0 Q 3000 002 32768 6750 Publication 1746 UMO008B EN P December 2006 72 Channel Configuration Data and Status The Data Formats for RTD Temperature Ranges for 0 5 and 2 0 mA Excitation Current table shows the temperature ranges of several 1746 NR4 RTDs The table applies to both 0 5 and 2 0 mA excitation currents The temperature ranges of the remaining RTD units vary with excitation current for example 1000 Q Platinum 385 table Data Format for 1000 Q Platinum RTD 385 1000 Q Platinum 3916 table Data Format for 1000 Q Platinum RTD 3916 and 10 Q Copper 426 table Data Format for 10 Q Copper 426 RTD Data Formats for RTD Temperature Ranges for 0 5 and 2 0 mA Excitation Current Data Format RTD Input Type Engineering Units x 1 Engineering Units x 10 SU opin Pilbara 0 1 C 0 1 F 1 0 C 1 0 F 100 Q Platinum 385 2000 8500 3280 15 620 200 850 328 1562 0 16 383 32 768 32 767 200 Q Platinum 385 2000 8500 3280 15 620 200 850 328 1562 0 16 383 32 768 32 767 500 Platinum 385 2000 8500 3280 15 620 200 850 328 1562 0 16 383 32 768 32 767 100 Q Platinum 3916 2000 6300 3280 11 660 200 630 328 1166 0 16 383 32 768 32 767 200 Platinum 3916 2000 630
22. PARA you periodically perform an autocalibration cycle e whenever an event occurs that greatly changes the internal temperature of the control cabinet such as opening or closing its door e at a convenient time when the system is not making product such as during a shift change An auto calibration programming example is provided in chapter 6 Single point Calibration Single point calibration is an optional procedure that can be used to improve the accuracy of the RTD module and cable combination to greater than 0 2 C 32 4 F Gwhen the RTD is operating at 50 C 122 F of the calibration temperature The offset determined by the single point calibration can be used to compensate for inaccuracies in the RTD module and cable combination After single point calibration is performed additional calibrations only need to be performed if the cable is disturbed or degraded RTD replacement should not affect the accuracy of the procedure However periodic auto calibrations should be performed Follow the steps below to perform a single point calibration 1 Cycle power to the SLC 500 chassis 2 Select a calibration temperature that is near the control point 10 C 50 P 3 Determine the exact resistance 0 01 ohm equivalent to the calibration temperature by using a published temperature vs resistance chart 4 Replace the RTD with the fixed precision resistor It is recommended that you use a 2 ppm te
23. Selector Switch I 1 0 Initial Programming Follow this example to enter data into the channel configuration word O e 0 through O e 3 when the channel is disabled bit 11 0 Refer to the Channel Configuration Word O e 0 through O e 3 Bit Definitions table for specific configuration details EXAMPLE As shown in the Configuration Word Setup diagram configure four channels of a RTD module residing in slot 3 of a 1746 chassis Configure each channel with the same parameters Publication 1746 UM008B EN P December 2006 Ladder Programming Examples 89 Configuration Word Setup 9 8 7 6 5 4 3 2 1 o Bit Number Bit Setting 15 14 13 12 11 10 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 A A A A A A A A Configures Channel For 200 CO Platinum RTD 385 Eng Units x 10 1 F step Broken Input Zero Data Word Degrees Fahrenheit F 10 Hz Filter Frequency Channel Enabled 2 0 mA Excitation Current Default Scaling Not Used This example transfers configuration data and sets the channel enable bits of all four channels with a single file copy instruction The file copy instruction copies four data words from an integer file you create in the SLC controller s memory to the RTD module s channel configuration words Copy File Data Flow ADDRESS SOURCE DATA FILE ADDRESS DESTINATIO
24. When used For two wire RTDs For three wire RTDs For three wire RTDs and potentiometer and potentiometers and potentiometers Short runs less than Long runs greater 100 feet and normal than 100 feet or high humidity levels humidity levels Conductors Two 0 205 mm 24 Three 0 205 mm Three 0 205 mm 24 AWG tinned copper 24 AWG tinned AWG tinned copper 7x 32 copper 7x 32 7x 32 Shield Beldfoil aluminum Beldfoil aluminum Beldfoil aluminum poyester shield with poyester shield with poyester shield with copper drain wire copper drain wire tinned braid shield Insulation PVC S R PVC Teflon Jacket Chrome PVC Chrome PVC Red Teflon Agency approvals NEC Type CM NEC Type CM NEC ART 800 Type CMP Temperature rating 80 C 176 F 80 C 176 F 200 C 392 F Publication 1746 UM008B EN P December 2006 Appendix B RTD Standards The following table shows various international and local RTD standards that apply to the 1746 NR4 RTD Type 41 EIC pIN p100 SAMA JIS old JIS new Minco 100 Platinum 0 00385 X X X 200 O Platinum 0 00385 X X X 500 O Platinum 0 00385 X X X 1000 Platinum 0 00385 X X X 100 Platinum 0 03916 X X 200 O Platinum 0 03916 X X 500 Platinum 0 03916 X X 1000 Platinum 0 03916 X X 10 Q Copper 0 00426 X 120 QNickel 0 00672 X 120 O Nickel 0 00672 X 604 Q Nickel Iron 0 00518 X 1 cis
25. by the processor during the subsequent scan Output Response The SLC processor may change the RTD module output data configuration as it appears in the processor output image However this data is not transferred to the RTD module when the slot is disabled The outputs are held in their last state When the slot is re enabled the data in the processor image is transferred to the RTD module Channel Configuration Chapter 5 Channel Configuration Data and Status This chapter examines the channel configuration word and the channel status word bit by bit It explains how the module uses configuration data and generates status during operation It gives you information about how to e configure a channel e examine channel input data e check a channel s status The channel configuration word is a part of the RTD module s output image Output words 0 3 correspond to channels 0 3 on the module Setting the condition of bits 0 15 in these words via your ladder logic program causes the channel to operate as you choose for example RTD type or reading in C Output words 4 7 are used to further define the channel configuration to let you choose a scaling format other than the module default when using the proportional counts data format You can use words 4 and 5 to define one user set range and words 6 and 7 to define a second range A bit by bit examination of the configuration word is provided in the Channel Config
26. configuration words 4 and 5 for scaling bits 13 and 14 The program for the following example is described on page 95 in Chapter 6 EXAMPLE You desire to control the line speed of a conveyor A 1000 Q potentiometer is used to sense the conveyor line speed The line speed varies between 3 ft minute 0 Q and 50 ft minute 1000 As shown in User set Scaling Using Proportional Counts Data Format on page 80 you select a 1000 Q potentiometer as the input type If you choose engineering units as the data format the module data word is a value between 0 1000 Q However if you choose the proportional counts data format and utilizes the user set scaling feature the number 3 can be entered in O e 4 and the number 50 in O e 5 In this situation the RTD module returns a number between 3 50 in its data word This action saves you time in ladder programming Publication 1746 UMO008B EN P December 2006 80 Channel Configuration Data and Status User set Scaling Using Proportional Counts Data Format Selected Proportional Counts Data Format im Tw SelectedConfiguratioWords 4 amp 5 for Scaling RC Selected 10002 Pot a NN eee Saas CH3 Configuration Wd O e 3 0 0 1 01 0 0 oof 0 1 1 1 1 1 0 15 0 Lowerscalelimtsetfn Ore4 0 0 0 0 00 0 0 0 0 0 0 00 1 1 Range 0 15 0 Upper scale limit set f amp ro gt 0 e 5 0 0 0 0 0
27. currently enabled Execute a dynamic configuration change to channel 2 of the RTD module located in slot 3 of a 1746 chassis Change from monitoring the temperature in F to monitoring in C Programming Procedure Rung 2 0 Rung 2 1 Rung 2 2 Rung 2 3 1 Create a new element in integer file N10 using the memory map function Integer file N10 already contains four elements N10 0 through N10 3 You add a fifth element N10 4 2 Enter the same configuration data as in the previous example using the data monitor function except for bit 8 Bit 8 is now set for a logic 0 C Set up all four channels S 1 COF E COPY FILE 15 Source N10 0 Dest 0 3 0 Length 4 Set channel 2 to display in C I 1 0 B3 xd 1 MOVE t OSR Source N10 4 0 0 Dest 0232 Set channel 2 back to display in F I 1 0 B3 MOV 1 EI OSR oie 0 1 Source N10 2 Dest 0 3 2 Kr HE N10 0 0 Radix Binary m Symbol Eolumns 16 Desc N10 z Properties Usage Help Publication 1746 UMO008B EN P December 2006 92 Ladder Programming Examples Verify Channel Configuration Changes When executing a dynamic channel configuration change there is always a delay from the time the ladder program makes the change to the time the RTD module gives you a data word using that new configuration information Therefore it is very importan
28. in the correct rack slot 1 0 Configuration Racks 1 174644 4 Slot Rack 2 vo Rack Not Installed 3 vo Rack Not Installed 1747 L553B C 5 05 CPU 64K Mem 05501 Series C 1745 NH4 Adv Config Help Read IO Config 1746 NI8 174Bsc NI8u 1746 NI161 1746 NI18l 1746 NI16V 1746 NI16V 1746 NIO4I 1746 NIO4V 1746 NO4 1746 NO4 1746 NO8l 1746 NDO8l 1746 NOSY 1746 NOSY Analog 4 Ch RTD AMCI 153x Hide All Cards Current Cards Available Filter Jal 10 m Analog 8 Channel Input Class 3 Analog 8 Ch Universal Analog 16 Ch Current Input Class 1 Analog 16 Ch Current Input Class 3 Analog 16 Ch Voltage Input Class 1 Analog 16 Ch Voltage Input Class 3 Analog 2 Ch In 2 Ch Current Qut Analog 2 Ch In 2 Ch Voltage Out Analog 4 Ch Current Output Analog 4 Ch Voltage Output Analog 8 Ch Current Output Class 1 Analog 8 Ch Current Output Class 3 Analog 8 Ch Voltage Output Class 1 Analog 8 Ch Voltage Output Class 3 Analog 4 Ch RTD Resistance Input Analog 8 Ch RTD Class 1 Analog 8 Ch RTD Class 3 Analog 4 Ch Thermocouple Input Analog 8 Ch Thermocouple Input 8 Dutput TRIAC 100 240 VAC 16 Output TRIAC 100 240 VAC Publication 1746 UMO008B EN P December 2006 132 1 0 Configuration 3 Click Adv Config to access more configuration options Advanced I 0 Configuration Slot 1 1745 NR4 Analog 4 Ch RTD AMCI 153x C
29. information in Chapter 5 as needed to complete the procedures in this appendix Or you may prefer to use the summary worksheet on page 128 Proceed as follows Procedure 1 Determine the input device type RTD type or resistance input for a channel and enter its respective 4 digit binary code in bit field 0 3 of the channel configuration word RTD Sensors Setting Resistance Bits 0 3 Platinum Platinum Copper eS DET 8 Nickel Iron Input Setting 0 00385 0 003916 0 00426 lt 0 00672 0 00518 Select 1009 0000 10092 0100 4949 1000 120 Q 1001 604 1011 150 Q 1100 Input Type 200 0001 200 Q 0101 120 1010 500 Q 1101 g 500 0010 500Q 0110 3 E 1000 Q 1110 1000 2 0011 1000 Q 0111 3000 Q 1111 1 Actual value at 0 C 32 F is 9 042 Q per SAMA standard RC21 4 1966 2 Actual value at 0 C 32 F is 100 per DIN standard Publication 1746 UMO008B EN P December 2006 126 Configuration Worksheet for RTD Resistance Module 2 Select a data format for the data word value Your selection determines how the analog input value registered by the analog sensor will be expressed in the data word Enter your 2 digit binary code in bit field 4 and 5 of the channel configuration word IMPORTANT Complete step 8 if you select proportional counts data format Select 00 engineering units x1 0 1 step 0
30. location of the module as slot 1 Input Image Detail SLC 500 Controller a Data Files i Input Image 8 words Output Image Address Address 1 0 1 0 Word0 ChannelO Data Word 4 3 0 0 0 0 0 0 0 0 0 0 0 0 0 010 0 1 1 Word 1 Channel 1 Data Word Bit15 Variable RTD resistance Input Data BitO 1 2 Word2 Channel 2 Data Word 1 3 Word3 Channel 3 Data Word Channel 0 Status Word e e Channel 1 Status Word e e Channel 2 Status Word 1 7 Word7 Channel 3 Status Word Test Your RTD Program 1 Apply power The module status LED indicator and channel 0 status LED indicator turn on 2 Download your program to the SLC processor 3 Make sure the controller is in Run mode For more information see chapter 7 Module Diagnostics and Troubleshooting LED Indicator Status INPUT CHANNEL 0 2 Channel LEDs STATUS 1 3 MODULE STATUS lt Module Status LED RTD resistance Publication 1746 UMO008B EN P December 2006 32 Quick Start Guide Publication 1746 UM008B EN P December 2006 Program Functional Check Optional Monitor the status of input channel 0 to determine its configuration setting and operational status This is useful for troubleshooting when the blinking channel LED indicator indicates that an error has occurred If the M
31. of insulation away to expose the end of the wire 3 At one end of the cable twist the drain wire and foil shield together bend them away from the cable and apply shrink wrap Then earth ground at the shield terminal 4 At the other end of the cable cut the drain wire and foil shield back to the cable and apply shrink wrap 5 Connect the signal wires and cable shield to the NR4 terminal block and the input 6 Repeat steps 1 through 5 for each channel on the NR4 module Cable Examples Two conductor Shielded Cable Ss Signal Wire Signal Wire Drain Wire Signal Wire Signal Wire Foil Shield Three conductor Shielded Cable Signal Wire SK Signal Wire Signal Wire Signal Wire Drain Wire Foil Shield Signal Wire signal Wire Publication 1746 UM008B EN P December 2006 Install and Wire the Module 4 Calibration The accuracy of a system that uses the RTD module is determined by e the accuracy of the RTD e resistance mismatch of the cable wires that connect the RTD to the module e the accuracy of the RTD module For optimal performance at the customer site the RTD module is calibrated at the factory prior to shipment In addition a self calibration feature called autocalibration further ensures that the module performs to specification over the life of the product Factory Calibration The four pin calibration connector on the RTD module circuit board is used for factory setup only
32. shown in the table above to the requirements of all other modules in the SLC chassis to prevent overloading the chassis power supply When you are using a fixed system controller refer to the Important note about module compatibility in a two slot expansion chassis on page 35 Install and Wire the Module 35 Module Location in Chassis This section contains information on module location in modular and fixed chassis Modular Chassis Considerations Place your RTD module in any slot of an SLC 500 modular chassis except slot 0 or a modular expansion chassis Slot 0 is reserved for the modular processor or adapter modules Fixed Expansion Chassis Considerations The 2 slot SLC 500 fixed 1 0 expansion chassis 1746 A2 supports only specific combinations of modules If you are using the RTD module in a 2 slot expansion chassis with another SLC I O or communication module refer to the Fixed Controller Compatibility Table to determine whether the combination can be supported When using the Fixed Controller Compatibility Table be aware that there are certain conditions that affect the compatibility characteristics of the BASIC module BAS and the DH 485 RS 232C module KE When you use the BAS module or the KE module to supply power to a 1747 AIC Link Coupler the link coupler draws its power through the module The higher current drawn by the AIC at 24V dc is calculated and recorded in the table for the modules identified as BASn
33. two RTD modules If combining an RTD module with a different module refer to the module compatibility table found in chapter 3 e For modular style systems calculate the total load on the system power supply using the procedure described in the SLC 500 Modular Style User Manual publication 1747 UM011 For more information refer to chapter 3 Install and Wire and Appendix A Specifications Quick Start Guide 25 Insert the Module ATTENTION Never install remove or wire modules with power applied to the chassis or devices wired to the module For more information refer to chapter 3 Install and Wire Make sure system power is off then insert the RTD module into your 1746 chassis In this example procedure local slot 1 is selected Module Insertion into Chassis O Sw WW Zo WO WH EID LA Pe N Top and Bottom Module Release s Wire the Module Connect RTD module or potentiometer wire leads to channel 0 of the RTD module See RTD Connections to Terminal Block on page 26 Two wire Potentiometer Connections to Terminal Block on page 27 or Three wire Potentiometer Connections to Terminal Block on page 28 For more information refer to chapter 3 Install and Wire Publication 1746 UMO008B EN P December 2006 26 Quick Start Guide RTD Connections to Terminal Block For details on wiring an RTD unit to the module see chapter 3 Two Wire RTD Interconnection Cable Shield f Shield Add
34. types except 150 Q For the 150 Qresistance input type the values are in 0 01 2 step Program Listing Values are 1 step or 102 step for all resistance input types except 150 Q For the 150 Qresistance input type the values are in 0 1 2 step Because a seven segment LED indicator display is used to display temperature the temperature data must be converted to BCD The 16 bit data word representing the temperature value is converted into BCD values by the program shown in the Program to Convert F to BCD Publication 1746 UMO008B EN P December 2006 110 Application Examples Program to Convert F to BCD Rung 2 0 Initialize Channel 0 First Pass Bit of RTD Module S 1 MOV MOVE 15 Source N10 0 Dest 0 3 0 Rung 2 1 Convert the channel 0 data word degrees F to BCD values and write this to the LED display If channel 0 is ever disabled a zero is written to the display TOD TO BCD Source I 3 0 Dest N7 0 mvm MASKED MOVE Source N7 0 Mask OFFF Dest 0 2 0 The use of the masked move instruction with the OFFF mask allows you to 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 N10 0 0 Radix Binary 2 Symbol Columns 16 1 Desc o po H Properties Usage Help Publication 1746 UM008B EN P December 2006 Application E
35. will set bit 11 and either enable or disable the channel The Excitation Current changes bit 12 and chooses 1 mA or 0 5 mA of excitation current If Raw Proportional is selected under data format the options for scaling and user ranges may become available Click OK to apply the changes after all channel parameters have been chosen The following screen appears and gives you the opportunity to chose where in the ladder logic to place the configuration rung Configuration Rung and Data E xj Integer Data File Number E Integer Data Element o Cancel Rung to be inserted XIC 2 1 15 COP N9 0 800 1 0 8 At Program File Number E Top v Publication 1746 UM008B EN P December 2006 134 0 Configuration 6 Click OK RSLogix 500 software automatically places a rung in the ladder logic that you defined The data file is also automatically changed to match the channel parameters entered Publication 1746 UM008B EN P December 2006 Glossary The following terms and abbreviations are specific to this product For a complete listing of Allen Bradley terminology refer to the Allen Bradley Industrial Automation Glossary Publication Number AG 7 1 A D Refers to the analog to digital converter inherent to the RTD Resistance input 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 magnitu
36. 0 3280 11 660 200 630 328 1166 0 16 383 32 768 32 767 500 Q Platinum 3916 2000 6300 3280 11 660 200 630 328 1166 0 16 383 32 768 32 767 120 Q Nickel 672 800 2600 1120 5000 80 260 112 500 0 16 383 32 768 32 767 120 Q Nickel 618 1000 2600 1480 5000 100 260 148 500 0 16 383 32 768 32 767 604 Q Nickel Iron 518 1000 2000 1480 3920 100 200 148 392 0 16 383 32 768 32 767 Data Format for 1000 Platinum RTD 385 Data Format Excitation Current Engineering Units x 1 Engineering Units x 10 Proportional 01 C 0 1 F 10 C psp Seed forPID Counts Defaults 0 5 mA 2000 8500 3280 15620 200 850 328 1562 0 16 383 32 768 32 767 2 0 mA 2000 2400 3280 4640 200 240 328 464 0 16 383 32 768 32 767 Data Format for 1000 Q Platinum RTD 3916 Data Format Excitation Current Engineering Units x 1 Engineering Units x 10 Scaled for PID Proportional Counts Defaults 0 1 C 0 1 F 1 0 C 1 0 F 0 5mA 2000 6300 3280 11 660 200 630 328 1186 0 16 383 32 68 32 767 2 0 mA 2000 2300 3280 44 600 200 230 328 446 0 16 383 32 768 32 767 Publication 1746 UM008B EN P December 2006 Channel Configuration Data and Status 73 Data Format for 10 Q Copper 426 RTD Data Format
37. 0 0 0 0 0 1 1 0 0 1 0 15 0 0 e 6 Defines lower scale limit for range 1 15 0 0 e 7 Defines upper scale limit for range 1 15 0 Configuration Words For User set Scaling Words 4 7 In the Limit Scale Words example it shows the address of the user set limit scale words used to define the lower value and the upper value of the user set scale words You can use these words when e bits 13 and 14 scaling select of the channel configuration word are 01 Limit Scale 0 and proportional counts mode is selected e bits 13 and 14 scaling select of the channel configuration word are 10 Limit Scale 1 and proportional counts mode is selected These scaling words are global for the module They are not exclusive to a particular channel Be sure the scaling limit range is used on only compatible channels Use range 0 or range 1 to apply the appropriate lower limit word and the upper limit word to any single channel or channels which are configured for user set scaling for proportional counts Any time a range is selected and an invalid combination of scaling limits is in that range a configuration error occurs For example if both scaling limits are 0 or if the lower range value is greater than or equal to the upper range value a configuration error occurs Limit Scale Words 0 e 4 Defines lower scale limit for range 0 Range 0 15 0 0 e 5 Defines upper scale lim
38. 025 F F 1000 Q 0 6 C 0 5 C 0 017 C C 0 014 C C 1 1 F 0 9 F 0 031 F F 0 025 F F 100 Q 1 0 C 0 4 C 0 034 C C 0 011 C 2 0 F 0 7 F 0 061 F F 0 020 F F 200 Q 1 0 C 0 4 C 0 034 C C 0 011 C C 2 0 F 0 7 F 0 061 F F 0 020 F F Platinum 3916 9 500 Q 0 5 C 0 4 0 014 C C 0 014 C 0 9 F 0 7 F 0 025 F F 0 025 F F 1000 Q 0 5 C 0 4 C 0 014 C C 0 014 C C 0 9 F 0 7 F 0 025 F F 0 025 F F 3 4 10 Q 5 0 6 C 5 0 017 C C Copper 426 Not allowed 11 F Not allowed 20 031 F F 36 120 Q 0 2 C 0 2 C 0 008 C 0 008 C C NieeliGns 0 4 F 0 4 F 20 014 F F 0 014 F F i 3 120 Q 0 2 C 0 2 C 0 008 C 0 008 C C Na e 0 4 F 0 4 F 40 014 F F 40 014 F F 3 604 Q 0 3 C 0 3 C 0 010 C 0 010 C C DUROS 0 5 F 505 F 40 018 F F 0 018 F F 2 3 4 5 6 Temperature drift specifications apply to a module that has not been calibrated The digits following the RTD unit type represent the temperature coefficient o Platinum 385 refers to a platinum RTD with 0 00385 Q Q C or simply 0 00385 C Actual value at 0 C 32 F is 9 042 Q per SAMA standard RC21 4 1966 Actual value at 0 C 32 F is 100 Qper DIN standard Public
39. 1 Q step and Data 0 01 Q step 150Q only Format 01 engineering units x10 1 step 1 Q step 150 Q only Bits 4 and 5 10 scaled for PID 0 to 16383 11 proportional counts 32768 to 32767 Refer to select scaling bits 13 and 14 3 Determine the desired state for the channel data word if an open or short circuit RTD only condition is detected for that channel Enter the 2 digit binary code in bit field 6 and 7 of the channel configuration word Bits 6 and 7 00 zero O01 upscale 10 downscale 11 invalid 5 If the channel is configured for RTD inputs determine if you want the channel data word to read in degrees Fahrenheit 1 or degrees Celsius 0 and enter a one or a zero in bit 8 of the configuration word Select Bits 8 Temperat 0 degrees Celsius 1 degrees Fahrenheit ure Units Publication 1746 UM008B EN P December 2006 Configuration Worksheet for RTD Resistance Module 127 6 Determine the desired input filter frequency for the channel and enter the 2 digit binary code in bit field 9 and 10 of the channel configuration word A smaller filter frequency increases the channel update time but also increases the noise rejection A larger filter frequency decreases the noise rejection but also decreases the channel update time Bits 9 Select Filter 00 10Hz 01250Hz 10 2 60 Hz 112250 Hz and 10 Frequency 7 If the channel will be used in your system it must be enabled b
40. 3 configuration 4 Channel 4 data 4 User set Lower limit scale 0 5 Channel 5 data 5 User set Upper limit scale 0 6 Channel 6 data 6 User set Lower limit scale 1 7 Channel 7 data 7 User set Upper limit scale 1 The Channel Configuration Words output image contain user defined configuration information for the specified input channel This information is used by the module to configure and operate each channel The Channel Status Words input image contain status information about the channel s current configuration and operational state The input data values of the analog input channel are contained in the Channel Data Word input image which is valid only when the channel is enabled and there are no channel errors for example broken sensor or overrange You set the Scaling Limit Words output image to provide a definable scaling range for the temperature resistance data when using the proportional counts data type Required Tools and Equipment Chapter 2 Quick Start Guide This chapter helps you get started using the RTD module The procedures included here assume that you have a basic understanding of SLC 500 products You must e understand electronic process control e be able to interpret the ladder logic instructions for generating the electronic signals that control your application Because this is a start up guide this chapter does not contain detailed explanations about the procedures listed It doe
41. 3 corresponds to the highest temperature value for that RTD or the highest resistance value Cohms For example if a 100 Q Platinum RTD a 0 003916 is selected then the relationship of temperature and module counts is shown in the following table Relationship Between Temperature and Counts Temperature Counts 200 C 328 F 0 630 C 1166 F 16383 Channel Configuration Data and Status 69 The Linear Relationship Between Temperature and PID Counts graph shows the linear relationship between output counts and temperature when one uses scaled for PID data format Linear Relationship Between Temperature and PID Counts Counts Proportional Counts Data Format If the user selects proportional counts data format the data word for that channel is a number between 32 768 and 32 767 This provides the greatest resolution of all scaling options The value 32 768 corresponds to the lowest temperature value of the RTD type or the lowest resistance value ohms The value 32 767 corresponds to the highest temperature value for that RTD or the highest resistance value ohms For example if a 100 Q Platinum RTD 3916 is selected then the relationship of temperature and module counts is shown in the following table Relationship Between Temperature and Counts Temperature Couns 200 C 328 F 32 768 630 C 1166 F 32 767 The Linear Relationship Between Temperature and
42. 4 C C 2 0 F 0 9 F 0 061 F F 0 025 F F Plati 385 enega ags 500 Q 40 6 C 10 5 C 40 017 C C 40 014 C C 1 1 F 0 9 F 0 031 F F 0 025 F F 1000 Q 0 6 C 0 5 C 0 017 C C 0 014 C C 1 1 F 0 9 F 0 031 F F 0 025 F F 100 Q 1 0 C 0 4 C 0 034 C C 0 011 C C 2 0 F 0 7 F 0 061 F F 0 020 F F 200 Q 1 0 C 0 4 C 0 034 C C 0 011 C C 22 0 F 0 7 F 0 061 F F 0 020 F F Plati 3916 LIU ME TS 405 C 104 9C 40 014 C C 40 011 C C 0 9 F 0 7 F 0 025 F F 0 020 F F 1000 Q 0 5 C 0 4 C 0 014 C C 0 011 C C 0 9 F 0 7 F 0 025 F F 0 020 F F Publication 1746 UM008B EN P December 2006 Specifications 121 RTD Accuracy and Temperature Drift Specification RTD Tyne Accuracy Accuracy Temperature Drift Temperature Drift YP 0 5 mA Excitation 2 0 mA Excitation 0 5 mA Excitation 2 0 mA Excitation 10Q 5 0 6 C Not allowed 0 017 C C Copper 26 OT 41 1 F 0 031 F F Nickel gigi 1202 10 2 C 0 2 C 0 008 C C 0 008 C C ickel 618 20 4 F 20 4 F 0 014 F F 0 014 F F 1 1 120 Q 0 2 C 0 2 C 0 008 C C 0 008 C C Nickel 672 0 4 F 40 4 F 20 014 F F 20 014 F F Nickel 51811 604 Q 0 3 C 0
43. 4 for resistance input types using the various data formats Channel Data Word Resolution for 150 O Resistance Input Resistance Input Type Data Format Bits 4 and 5 Engineering Units x 1 Engineering Units x 10 Scaled for PID Proportional Counts Defaults Ohms Ohms Ohms Ohms 150 Q 0 01 2 step 0 1 2 step 0 0092 Q step 0 0023 2 step Publication 1746 UMO008B EN P December 2006 Channel Configuration Data and Status 75 Channel Data Word Resolution for 500 1000 O and 3000 Resistance Inputs Data Format Bits 4 and 5 iion Input Engineering Units x 1 Engineering Units x 10 Scaled for PID Sont neti Ohms Ohms Ohms Ohms 500 Q 0 1 Q step 0 1 2 step 0 0305 Q step 0 0076 Q step 1000 Q 0 1 2 step 0 1 2 step 0 0610 Q step 0 0153 Q step 3000 Q 0 1 2 step 0 1 2 step 0 1831 Q step 0 0458 Q step Broken Input Selection Bits 6 and 7 The Bit Descriptions for Broken Input Selection table shows the descriptions for bits 6 and 7 The broken input bit field lets you define the state of the channel data word when an open circuit or short circuit condition is detected for that channel An open circuit condition occurs when the RTD or potentiometer or its extension wire is physically separated or opened This can happen if the wire is cut or disconnected from the terminal block The short circuit condition applies only to RTD input t
44. 50 0 145 OBP16 0 250 OVP16 e 0 250 NT4 e 0 060 0 040 NR4 0 050 0 050 HSTP1 e 0 200 1 A dot indicates a valid combination 2 No symbol indicates an invalid combination BA triangle indicates an external power supply is required General Considerations Most applications require installation in an industrial enclosure to reduce the effects of electrical interference RTD inputs are susceptible to electrical noises due to the small amplitudes of their signal Group your modules to minimize adverse effects from radiated electrical noise and heat Consider the following conditions when selecting a slot for the RTD module Position the module in a slot e away from power lines load lines and other sources of electrical noise such as hard contact switches relays and AC motor drives e away from modules which generate significant radiated heat such as the 32 point I O modules Publication 1746 UMO008B EN P December 2006 38 Install and Wire the Module Module Installation and Removal Publication 1746 UM008B EN P December 2006 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 Write on Label SLOT RACK MODULE Remove the Terminal Block Never install remove or wire m
45. 57 50 Hz Filter Notch Frequency 3 dB 100 Amplitude in dB 120 140 160 180 200 0 50 100 150 200 250 300g 13 1 Hz Frequency Frequency Response 60 Hz Filter Notch Frequency Amplitude in dB 100 120 140 160 180 200 0 60 120 180 240 300 Hz Frequency 15 72 Hz Frequency Response 250 Hz Filter Notch Frequency 100 Amplitude in dB 120 140 160 180 200 0 250 500 750 1000 1250 1500 uz Frequency 65 5 Hz Frequency Response Publication 1746 UMO008B EN P December 2006 58 Preliminary Operating Considerations Scanning Process and Channel Timing Publication 1746 UM008B EN P December 2006 This section shows how to determine the channel update time and channel autocalibration time In addition the scanning process is briefly described The RTD module channel update time is defined as the time required for the module to sample and convert scan the input signal of an enabled input channel and make the resulting data value available to the SLC processor for update Channel Autocalibration Upon entry into the channel enabled state the corresponding channel is calibrated and configured according to the channel configuration word information Channel calibration takes precedence over channel scanning and is a function of the selected notch filter Channel Calibration Time Filter Frequency Channel Calibrati
46. Auto calibration When a channel becomes enabled the module configures the channel and performs an auto calibration on the channel The channel is selected the excitation current is turned off and the three input lines for the channel are connected to analog common The module s A D converters are configured for the proper gain and filter frequency that is appropriate for your RTD configuration Auto calibration performs an A D conversion on the zero voltage analog common and the full scale voltage A D reference voltage on the following signals e Lead wire signal e RTD resistance signal e Excitation current signal IMPORTANT Channel calibration time is shown in the Channel Calibration Time table These conversions generate offset zero reference and full scale span reference coefficients that are saved and used by the module to perform future A D conversions on this channel Publication 1746 UMO008B EN P December 2006 48 Install and Wire the Module Publication 1746 UM008B EN P December 2006 You can command your module to perform an auto calibration cycle by disabling a channel waiting for the channel status bit to change state 1 to 0 and then re enabling that channel Several scan cycles are required to perform an auto calibration refer to page 4 11 It is important to remember that during auto calibration the module is not converting input data To maintain system accuracy it is recommended that TIP MAD y
47. BAS networked or KEn KE networked Make sure to refer to these modules if your application uses the BAS or KE module in this way Publication 1746 UMO008B EN P December 2006 36 Install and Wire the Module Publication 1746 UM008B EN P December 2006 Fixed Controller Compatibility Table Modules NR4 5V dc Amps 24V dc Amps A4 e 0 035 A8 e 0 050 IA16 0 085 IM4 e 0 035 IM8 e 0 050 IM16 0 085 0A8 e 0 185 OA16 e 0 370 OAP12 e 0 370 IB8 0 050 IB16 0 085 IV8 0 050 IV16 0 085 IG16 e 0 140 IH16 e 0 085 0V8 e 0 135 0V16 0 270 OB8 0 135 OBP8 e 0 135 OG16 e 0 180 ow4 e 0 045 0 045 OW8 e 0 085 0 090 OW16 2 0 170 0 180 104 e 0 030 0 025 108 e 0 060 0 045 1012 e 0 090 0 070 NIA 0 025 0 085 NI8 e 0 200 0 100 NIOAI e 0 055 0 145 NIO4V e 0 055 0 115 FIO4I e 0 055 0 150 FI04V 0 055 0 120 DCM e 0 360 HS e 0 300 OB16 e 0 280 OB16E e 0 135 IN16 0 085 BASn e 0 150 0 125 BAS 0 150 0 040 0B32 0 452 0V32 0 452 IV32 0 106 IB32 0 106 Fixed Controller Compatibility Table Install and Wire the Module 37 Modules NR4 5V dc Amps 24V dc Amps 0X8 e 0 085 0 090 NO4I AS 0 055 0 195 NO4V 0 055 0 145 ITB16 e 0 085 ITV16 e 0 085 IC16 e 0 085 KE 0 150 0 40 KEn e 0 1
48. C 32 F is 100 2 per DIN standard 3 Actual value at 0 C 32 F is 9 042 Q per SAMA standard RC21 4 1966 1 The temperature range for the 1000 Q2RTD is dependant on the excitation current To maximize the relatively small RTD unit signal only 2 mA excitation current is allowed 2 The digits following the RTD type represent the temperature coefficient of resistance ed which is defined as the resistance change per ohm per C For instance Platinum 385 refers to a platinum RTD with 0 00385 Q Q C or simply 0 00385 C Publication 1746 UMO008B EN P December 2006 14 Overview IMPORTANT configuring the module The exact signal range valid for each input type is dependent upon the excitation current magnitude that you select when For details on excitation current refer to page 119 This table shows the accuracy and temperature drift Accuracy and Temperature Drift Specifications RTD Unit Type Accuracy Accuracy Temperature Drift Temperature Drift 0 5 mA excitation 0 2 mA excitation 0 5 mA excitation 0 2 mA excitation 100 Q 0 1 C 0 5 C 0 034 C C 0 014 C C 2 0 F 0 9 F 0 061 F F 0 025 F F 200 Q 0 1 C 0 5 C 0 034 C C 0 014 C C i3 2 0 F 0 9 F 0 061 F F 0 025 F F Plati 385 ate 500 Q 06 C 10 5 C 40 017 C C 40 014 C C 1 1 F 0 9 F 0 031 F F 0
49. However if your product is not functioning it may need to be returned United States Contact your distributor You must provide a Customer Support case number see phone number above to obtain one to your distributor in order to complete the return process Outside United Please contact your local Rockwell Automation representative for States return procedure Power Control and Information Solutions Headquarters Americas Rockwell Automation 1201 South Second Street Milwaukee WI 53204 2496 USA Tel 1 414 382 2000 Fax 1 414 382 4444 Europe Middle East Africa Rockwell Automation Vorstlaan Boulevard du Souverain 36 1170 Brussels Belgium Tel 32 2 663 0600 Fax 32 2 663 0640 Asia Pacific Rockwell Automation Level 14 Core F Cyberport 3 100 Cyberport Road Hong Kong Tel 852 2887 4788 Fax 852 2508 1846 Publication 1746 UMO008B EN P December 2006 Supersedes Publication 1746 6 7 June 1998 Copyright 2006 Rockwell Automation Inc All rights reserved Printed in the U S A
50. N DATA FILE N10 0 Channel Configuration Word 0 320 3 0 N10 1 Channel Configuration Word 1 0 3 1 N10 2 Channel Configuration Word 2 0 3 2 N10 3 Channel Configuration Word 3 0 3 3 Publication 1746 UMO008B EN P December 2006 90 Ladder Programming Examples Publication 1746 UM008B EN P December 2006 Programming Procedure 1 Create integer file N10 in your programming software Integer file N10 should contain four elements N10 0 through N10 3 Enter the configuration parameters for all four RTD channels into a source integer data file N10 Refer to the Configuration Word Setup for the bit values See page 128 for a channel configuration worksheet 1 1 1 1 fae II N10 0 0 Radix Binary z Symbol Columns fie zl Dee oY uo H Properties Usage Help Program this rung to use the copy file instruction COP to copy the contents of integer file N10 to the four consecutive output words of the RTD module beginning with O 3 0 All elements are copied from the specified source file to the destination during the first scan after applying power to the module First Pass Bit Initialize RTD module S 1 SUE 1E COPY FILE 15 Source N10 0 Dest 0 3 0 Length 4 Ladder Programming Examples 91 Dynamic Programming The programming example explains how to change data in the channel configuration word when the channel is
51. Proportional Counts graph shows the linear relationship between output counts and temperature when one uses proportional counts data format Publication 1746 UMO008B EN P December 2006 70 Channel Configuration Data and Status Linear Relationship Between Temperature and Proportional Counts Courts 32 767 32 768 Publication 1746 UMO008B EN P December 2006 Channel Configuration Data and Status 71 Scaling Examples The following examples are using the default scaling ranges Scaled for PID to Engineering Units Equation Engr Units Equivalent Si gw Suigu Stow x Scaled for PID value displayed 16383 Assume that the input type is an RTD Platinum 200 a 0 00385 C range 200 C 850 C scaled for PID display type Channel data 3421 Want to calculate C equivalent From Channel Data Word Format Table Data Formats for RTD Temperature Ranges for 0 5 and 2 0 mA Excitation Current through Table Data Format for 500 Q Resistance Input Sj gw 200 C and Spigy 850 C Solution Engr Units Equivalent 200 C 850 C 200 C x 3421 16383 19 25 C Engineering Units to Scaled for PID Equation Scaled for PID Equivalent 16383 x Engineering Units desired Stow Suigh Stow Assume that the input type is an RTD Platinum 200 a 0 00385 C range 200 C 850 C scaled for PID display type Desired channel temp 344 C Want to calculate
52. RT25G Replacement Terminal Cover 1746 R13 series G 1746 NR4 User Manual 1746 6 7 Contact Rockwell If you need to contact Rockwell Automation for assistance please Automation have the following information available when you call e A clear statement of the problem including a description of what the system is actually doing Note and record the LED indicator states also note input and output image words for the RTD module e A list of things you have already tried to remedy the problem e Processor type 1746 NR series letter and firmware FRN number See label on left side of processor e Hardware types in the system including I O modules and chassis e Fault code if the SLC processor is faulted Publication 1746 UMO008B EN P December 2006 Basic Example SLC 5 04 Controller Chapter 8 Application Examples This chapter provides two application examples to help you use the RTD input module They are defined as a e basic example e supplementary example The basic example builds on the configuration word programming provided in chapter 6 to set up one channel for operation This setup is then used in a typical application to display temperature The supplementary example demonstrates how to perform a dynamic configuration of all four channels The example sets up an application that allows you to manually select whether the displayed RTD input data for any channel is expressed in C or F Use the
53. Scaled for PID equivalent From Channel Data Word Format Table Data Formats for RTD Temperature Ranges for 0 5 and 2 0 mA Excitation Current through Table Data Format for 500 Q Resistance Input Sj gw 200 C and Spigy 850 C Solution Scaled for PID Equivalent 16383 x 344 C 200 C 850 C 200 C 8488 Proportional Counts to Engineering Units Equation Engr Units Equivalent Si gw Syigh Stow x Proportional Counts value displayed 32768 65536 Assume that input type is a potentiometer 1000 Q range 0 to 1000 QJ proportional counts display type Channel data 21567 Want to calculate ohms equivalent From Channel Data Word Format Table Data Formats for RTD Temperature Ranges for 0 5 and 2 0 mA Excitation Current through Table Data Format for 500 Q Resistance Input Sow 0 Qand Spigy 1000 Q Solution Engr Units Equivalent 0 Q 1000 2 0 Q x 21567 32768 65536 829 Q Engineering Units to Proportional Counts Equation Proportional Counts Equivalent 65536 x Engineering Units desired Stow Suigu Stow l 32768 Assume that input type is a potentiometer 3000 Q range 0 to 3000 Q proportional counts display type Desired channel resistance value 1809 Q Want to calculate Proportional Counts equivalent From Channel Data Word Format Table Data Formats for RTD Temperature Ranges for 0 5 and 2 0 mA Excitation Current through Table Data Format for 500 Q Resistance
54. Status LED green Displays module operating and fault status 3 Removable Terminal Block Provides physical connection to input devices 4 Cable Tie Slots Secure wiring from module 5 Door Label Provides terminal identification 6 Side Label Nameplate Provides module information 7 Self locking Tabs Secure module in chassis slot General Diagnostic Features The RTD module contains diagnostic features that can be used to help you identify the source of problems that may occur while you turn on the power or during normal channel operation The power and channel diagnostics are explained in Chapter 7 Module Diagnostics and Troubleshooting Publication 1746 UMO008B EN P December 2006 18 Overview System Overview Publication 1746 UM008B EN P December 2006 The RTD module communicates to the SLC 500 processor through the parallel backplane interface and receives 5V dc and 24V dc power from the SLC 500 power supply through the backplane No external power supply is required You may install as many RTD modules in your system as the power supply can support RTD Module Configuration RTD Modules SLC Processor oooo Each individual channel on the RTD module can receive input signals from two three or four wire RTD sensors or from resistance input devices You configure each channel to accept either input When configured for RTD input types t
55. able Shield Potentiometer RTD Belden 9501 Shielded Cable Potentiometer wiper arm can be connected to either the RTD or return terminal depending on whether the user wants increasing or decreasing resistance Co RTD Potentiometer Return I en o Belden 9501 Shielded Cable Publication 1746 UM008B EN P December 2006 28 Quick Start Guide Shield Chl 0 RTD Chl 0 Sense Chl 0 Return Shield Chl 0 RTD Chl 0 Sense Chl 0 Return Three wire Potentiometer Connections to Terminal Block For details on wiring an RTD to the module see chapter 3 Cable Shield Run RTD unit and sense wires from module to potentiometer terminal and tie them to one point Potentiometer Return Belden 83503 or Belden 9533 Shielded Cable Potentiometer wiper arm can be connected to either the RTD or return terminal depending on whether you want increasing or decreasing resistance Cable Shield Run RTD and sense wires from module to potentiometer terminal and tie them to one point Potentiometer Belden 83503 or Belden 9533 Shielded Cable Configure Your 1 0 Configure your system I O configuration for the particular slot where the RTD module resi
56. ancel Help Maximum Input Words 9 Maximum Output Words Scanned Input Words Scanned Output Words Interrupt Service Routine ISR M Length M1 Length Configure Edit G Data WU G File Lenath Click Configure to access the channel configuration options 1746 NR4 Analog 4 Ch RTD AMCI 153x Channel 1 Channel 2 Channel 3 Channel 4 Channel Enabled Temperature Units ec Filter Frequency Broken Input fi OHz Y Zero Y Data Format Excitation Current Engineering Units fi D m UserRangeO Low Scaling p fault 0 User Range 0 High fo User Range 1 Low fo User Range 1 High Cancel Apply Help Publication 1746 UM008B EN P December 2006 1 0 Configuration 133 Each tab is labeled with the corresponding channel that it will configure The pull down menus let you chose the various parameters for the channel Each menu effects the corresponding bits for the configuration data file Input Type changes bits 0 3 and chooses the type of RTD Resistance input Data Format changes bits 4 5 and selects between engineering units and scaled for PID Broken Input changes bits 6 7 and chooses how to handle an open circuit condition Temperature Units changes bit 8 and selects Fahrenheit or Celsius Filter Frequency changes bits 9 10 and sets the cutoff frequency of the channel filter Clicking the Channel Enable box
57. annel configuration The following sections give you procedures to configure the channels Configure Each Channel 1 Determine the input device type RTD type or resistance input for a channel and enter its respective four digit binary code in bit field 0 3 Input Type Selection of the channel configuration word 2 Select a data format for the data word value Your selection determines how the analog input value from the A D converter is expressed in the data word 3 Enter your two digit binary code in bit field 4 5 Data Format Selection of the channel configuration word Depending upon how you configure these bit settings you may have to select a user set scaling range User set Scaling Using Proportional Counts Data Format on page 80 gives an example on how to do this 4 Determine the desired state for the channel data word if a broken input condition is detected for that channel open circuit or short circuit 5 Enter the two digit binary code in bit field 6 and 7 Broken Input Selection of the channel configuration word 6 10 11 12 Channel Configuration Data and Status 65 If the channel is configured for RTD inputs and engineering units data format determine if you want the channel data word to read in C or F and enter a one or a zero in bit 8 Temperature Units of the configuration word If the channel is configured for a resistance input this field is ignored Determine
58. ation 1746 UMO008B EN P December 2006 To maximize the relatively small RTD unit signal only 2 mA excitation current is allowed 7 The accuracy values assume that the module was calibrated within the specified temperature range of 0 60 C 32 140 F resistance od which is defined as the resistance change per ohm per C For instance Overview 15 When you are using 100 Q or 200 Q platinum RTD units with 0 5 mA excitation current refer to the following important information about module accuracy IMPORTANT Module accuracy using 100 Qor 200 Q platinum RTD units with 0 5 mA excitation current depends on the following criteria e Module accuracy is 0 6 C 33 08 F after you apply power to the module or perform an autocalibration at 25 C 77 F ambient with module operating temperature at 25 C 77 F Module accuracy is 0 6 C AT x 0 034 C C or 33 08 F AT x 32 06 F F after you apply power to the module or perform an autocalibration at 25 C 77 F ambient with the module operating temperature between 0 60 C 32 140 F Where AT is the temperature difference between the actual operating temperature of the module and 25 C 77 F and 0 034 C C 32 06 F F is the temperature drift shown in the table above for 100 Qor 200 2 platinum RTD units Module accuracy is 1 0 C 33 80 F after you apply power to the module or perform an autocalibration at
59. ation with a SLC 500 Remote 1 0 Adapter Module 1747 ASB use block transfer for configuration and data retrieval Block transfer requires a 1747 SN Remote 1 0 Scanner series B or PLC processor The module contains a removable terminal block item 3 providing connection for any mix of four RTD sensors or resistance input devices There are no output channels on the module Module configuration is done via the user program There are no DIP switches Publication 1746 UMO008B EN P December 2006 Overview 17 RTD Module Hardware 6 1 INPUT i CHANNEL moa 5 ker e e STATUS iB L3 Az as MODULE STATUS Ez Z So 2 ee RTD resistance A HIRES SHIELD 2 E 98 eS Vm TE 3 7 ag l ene TREE po FER RETN oa 4 ET SHIELD 1 SHIELD odo G9 CHL 2 S23 i WD os a35 e CHL2 RTD 25 SENSE out a Z G CHL 2 SENSE B a zz e RETAN lcu 3 B5 4 RETRN O SHIELD a z ae z X JUN Ol 8 z 7 Hardware Features Feature Description 1 Channel Status LED Indicators Display operating and fault status of green channels 0 1 2 and 3 2 Module
60. bits 13 and 14 of status word Bit 15 is not cleared until the you make the correct change to the channel configuration The channel LED indicator stops blinking and resumes steady illumination when the fault conditions are corrected IMPORTANT If you clear 0 a channel enable bit 11 all channel status information including error information is reset 0 The RTD module has five LED indicators Four of these are channel status LED indicators numbered to correspond to each of the RTD resistance input channels and one is a module status LED indicator LED Indicator Display INPUT CHANNEL 0 12 Channel LED Indicators STATUS 1 3 MODULE STATUS lt Module Status LED Indicator RTD resistance Module Diagnostics and Troubleshooting 101 The LED Indicator Status Description table explains the function of the channel status LED indicators while the module status LED indicator is turned on LED Indicator Status Description If Module And Channel Indicated Condition Corrective Action Status LED Status LED Indicator is Indicator is On On Channel enabled No action required Flashing Broken Input Condition To determine the exact open circuit for RTD or error check the error bits resistance input and 13 15 in the input image short circuit for RTD Check the channel inputs only configuration word for m valid data Make sure that Out of range Condition the
61. ble change in a measurement typically expressed in engineering units for example 0 1 C or as a number of bits For example a 12 bit system has 4 096 possible output states It can therefore measure 1 part in 4096 RTD Resistance Temperature Detector A temperature sensing element with 2 3 or 4 lead wires It uses the basic characteristic that electrical resistance of metals increases with temperature When a small current is applied to the RTD it creates a voltage that varies with temperature This voltage is processed and converted by the RTD module into a temperature value sampling time The time required by the 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 A D input signal to reach 100 of its expected final value given a large step change in the input signal update time The time required for the module to sample and convert the input signals of all enabled input channels and make the resulting data values available to the SLC processor A A D 135 addressing 52 configuration word 52 addressing example 52 data word 53 status words 53 addressing example 53 alarms 96 application examples 107 attenuation 135 autocalibration 97 how to invoke 97 when to us
62. ble impedance keep input cables as short as possible Locate your I O chassis as near the RTD sensors as your application will permit e Ground the shield drain wire at one end only The preferred location is at the RTD module Refer to IEEE Std 518 Section 6 4 2 7 or contact your sensor manufacturer for additional details e Each input channel has a shield connection screw terminal that provides a connection to chassis ground All shields are internally connected so any shield terminal can be used with channels 0 3 e Route RTD resistance input wiring away from any high voltage I O wiring power lines and load lines Publication 1746 UMO008B EN P December 2006 42 Install and Wire the Module e Tighten terminal screws using a flat or cross head screwdriver Each screw should be turned tight enough to immobilize the wire s end Excessive tightening can strip the terminal screw The torque applied to each screw should not exceed 0 565 Nm 5 in lb for each terminal e Follow system grounding and wiring guidelines found in your SLC 500 Installation and Operation Manual publication 1747 UM011 RTD Connections to Terminal Block Two wire RTD Interconnection Cable Sh
63. cal increments of the channel data word These may be scaled for PID or Engineering Units for RTD or potentiometer inputs which are automatically scaled They may also be proportional counts which you must calculate to fit your application s temperature or resistance resolution local configuration A control system where all the chassis are located within several feet of the processor and chassis to chassis communication is via a 1746 C7 or 1746 C9 ribbon cable LSB Least Significant Bit Refers to a data increment defined as the full scale range divided by the resolution The LSB represents the smallest value within a string of bits multiplexer A 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 noise signals between or among circuit signal conductors but not between equipment grounding conductor or signal reference structure and the signal conductors potentiometer Pot A variable resistor that can be connected to the RTD module Publication 1746 UMO008B EN P December 2006 138 Glossary Publication 1746 UM008B EN P December 2006 remote configuration 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 detecta
64. ccurs the channel data word is set to its maximum value e under range The RTD temperature is less than the minimum allowed default or user set temperature When this occurs the channel data word is set to its minimum value IMPORTANT There is no under range error for a direct resistance input default scaling This bit is cleared 0 when the e channel is disabled e channel operation is normal the out of range condition clears e broken input error bit bit 13 is set 1 Configuration Error Bit 15 This bit is set 1 whenever an enabled and configured channel detects that the channel configuration word is not valid A configuration word is not valid for any of the these reasons e Input type is a 10 Q Copper RTD and the excitation current is set for 0 5 mA which is not allowed e Scaling select bits 13 and 14 are set to 11 which is invalid e Broken Input select bits 6 and 7 are set to 11 which is invalid e Scaling select bits 13 and 14 are set to 01 or 10 and scaling limit words 0 e Data format bits are set to 11 the scaling select bits are set to 01 or 10 and the lower limit user set scale word is greater than or equal to the upper limit user set scale word All other status bits reflect the settings from the configuration word even those settings that may be in error However bit 15 is cleared if the channel is disabled or if channel operation is normal Device Configuration Chapter 6 Ladde
65. ck file length of 23 words The Process Variable is address ung 2 1 annel 3 0 which stores the value of input data word 0 channel 0 Output of Status the PID instruction is stored at address N11 23 Control Variable gon d address PID PID 11 Control Block N11 0 Process Variable I 3 0 Control Variable N11 23 Control Block Length 23 The Rate and Offset parameters should be set per your application The Dest is typically an analog output Rung 2 2 channel Refer to the SLC Instruction Set Reference Manual or Analog 1 0 Modules User Manual for specific examples of the SCL instruction SCL SCALE Source N11 23 Rate 10000 Offset Dest Rung 2 3 JEND F3 Data File N10 bin MOD CONFIG _ 0 x Publication 1746 UM008B EN P December 2006 Offset 15 14 13 12 1l 10 9 gt N10 0 0 Radix Binary bd Symbol Columns 16 Desc wo Properties Usage Help Ladder Programming Examples 95 Use the Proportional Counts Data Format with User set Scaling Six elements are copied from the Rung 2 0 specified source address N10 0 to the l specified output 0 30 0 Each element is a 16 bit integer as shown in the data table at the bottom of the page The Source of this instruction is the data word from the RTD module which is anumber between 3 50 The Dest in this application is an analog output channel controlling the speed of the conveyor motor drive The Rate and Offset paramete
66. d 1 channel enabled paia eee gea ima 1 0 5 mA Select Bit 13 Sedna Selett 00 module defined scaling 01 2 config words 4 and5 10 config words 11 Not used config and 14 g default for scaling 6 amp 7 for scaling error Bits 15 Not Used 0 always make this setting Actual value at 0 C 32 F is 9 042 Qper SAMA standard RC21 4 1966 2 Actual value at 0 C 32 F is 100 Qper DIN standard B Values are 0 1 step or 0 102 step for all resistance input types except 150 Q For the 150 Qresistance input type the values are in 0 01 Q step V Values are 1 step or 1Q2 step for all resistance input types except 150 Q For the 150 Qresistance input type the values are in 0 1 Q2 step Publication 1746 UMO008B EN P December 2006 114 q Application Examples Publication 1746 UMO008B EN P December 2006 Program Setup and Operation Summary 1 Set up two configuration words in memory for each channel one for C and the other for F Channel Configuration Word Allocation F c 0 N10 0 N10 4 1 N10 1 N10 5 2 N10 2 N10 6 3 N10 3 N10 7 2 When the position of the degrees selector switch changes write the appropriate channel configuration to the RTD module Note that the use of the OSR instruction one shot rising makes these configuration changes edge triggered that is the RTD unit is reconfigured only when the selector switch changes position C oF Degrees Selec
67. d repeatability See RTD and resistance device compatibility tables on page 13 Display resolution See Channel Data Word Resolution table on page 74 Module update time See chapter 4 Update Time page 58 Channel turn on time Requires up to one module update time plus one of the following e 250 Hz Filter 388 ms e 60 Hz Filter 1 300 ms e 50 Hz Filter 1 540 ms e 10 Hz Filter 7 300 ms Publication 1746 UM008B EN P December 2006 Specifications 119 Input Specifications Channel turn off time Requires up to one module update time Reconfiguration time Requires up to one module update time plus one of the following e 250 Hz Filter 124 ms e 60 Hz Filter 504 ms e 50 Hz Filter 604 ms e 10 Hz Filter 3 004 ms RTD excitation current Two current values are user selectable e 0 5 mA Recommended for use with higher resistance ranges for both RTDs and direct resistance inputs 1000 Q RTDs and 3000 Qresistance input Refer to RTD manufacturer for recommendations Cannot use for 10 Q Copper RTD e 20 mA Must use for 10 Q Copper RTD Recommended to use for all other RTD and direct resistance inputs except 1000 RTDs and 3000 Q resistance input ranges are limited Refer to RTD manufacturer for recommendations Module Accuracy RTD Temperature Ranges Resolution and Repeatability Temp Range Temp Range p x RTD Type 0 5 mA Excitation 2 0
68. de of a signal as it passes through a system channel Refers to one of four small signal analog input interfaces available on the module s terminal block Each channel is configured for connection to an RTD or potentiometer input device and has its own diagnostic status word chassis A hardware assembly that houses devices such as I O modules adapter modules processor modules and power supplies common mode rejection ratio The ratio of a device s differential voltage gain to common mode voltage gain expressed in dB CMRR 20 Logio wi 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 Information is written to the configuration word through the logic supplied in your ladder program Publication 1746 UMO008B EN P December 2006 136 Glossary Publication 1746 UM008B EN P December 2006 cut off frequency The frequency at which the input signal is attenuated 3 dB by the digital filter Frequency components of the input signal below the cut off frequency are passed with under 3 dB of attenuation 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
69. des slot 1 in this example Select the 1746 NR4 module from the list of modules or if it is not listed in your software version select Other and enter the RTD module ID code 3513 at the prompt on the I O configuration display For more information refer to chapter 4 Preliminary Operating Considerations Publication 1746 UM008B EN P December 2006 Quick Start Guide 29 Configure the Module Determine the operating parameters for channel 0 In this example the figure shows the channel 0 configuration word defined with all defaults 0 except for channel enable bit 11 The addressing reflects the location of the module as slot 1 For details on how to configure the module for your application refer to chapter 4 and chapter 5 A configuration worksheet is included on page 132 to assist you in channel configuration For more information refer to chapter 5 Channel Configuration Data and Status Output Image Detail Channel Disabled e 2 0mA Excitation Current Module Defined Scaling If proportional counts data format is used then output words 4 7 can be used to define a user set scaling range for each channel S S oO Pd SLC 500 Controller p va 3 2 s S Data Files e Elo Es Be las E mem 2 e Sal Ss lels z B utput Image e e les alal 2 E D Input Image 8 words 5 E z E 5 t Address o 0 1 0 Word 0
70. dule ID code for the RTD module 1746 NR4 is 3513 No special I O configuration information is required The module ID code automatically assigns the correct number of input and output words Publication 1746 UMO008B EN P December 2006 52 Preliminary Operating Considerations Module Addressing The memory map displays how the output and input image tables are defined for the RTD module Bit 15 Bit 0 Address Were 8 Words User set Upper Scale Limit Range 1 Word7 0 e 7 RTD Module SLC 5 0X Image Table Data Files Address bos Chamel o Data Word Input Image 8 Words Channel 0 Data Word Word0 Le 0 Channel 1 Data Word Word1 ke1 Class 1 Input Image Channel 2 Data Word Word2 Le2 Channel 3 Data Word Word3 I e 3 Channel 0 Status Word Word4 Le4 Channel 1 Status Word Word5 e 5 Channel 2 Status Word Word6 Le 6 Channel 3 Status Word Word7 Le Bit 15 BitO Output Image Configuration Words The 8 word RTD module output image defined as the output from the CPU to the RTD module contains information that you configure to define the way a specific channel on the RTD module will work These words take the place of configuration DIP switches on the module Although the RTD output image is eight words long only output words 0 3 are used to define the operation of the module output words 4 7 are used for special user set scaling using the proportional c
71. e Allen Bradley SLC 500 RTD Resistance Input Module 1746 NR4 User Manual e ee oe ee ey m tat Rockwell Automation 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 available from your local Rockwell Automation sales office or online at http literature rockwellautomation com 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 Rockwell Automation Inc 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 Rockwell Automation Inc cannot assume responsibility or liability for actual use based on the examples and diagrams No patent liability is assumed by Rockwell Automation Inc with respect to use of information circuits equipment or software described in this manual
72. e it 97 bit allocation 66 in configuration word 66 in status word 83 broken circuit 75 downscale enable 75 upscale enable 75 zero 75 broken input bit description in configuration word 75 bit description in status word 84 broken input error bit description in status word 85 C cable tie slots 17 calibration 47 auto cal 47 factory cal 47 single point cal 48 CE Certification 33 channel calibration times 58 configuration error 102 bit description in status word 86 definition 135 filter frequency 54 effects on noise filtering 54 effects on update time 54 channel status bit 85 bit description in status word 85 channel timing channel scan time 58 update time 58 chassis 135 feb Index CMRR 135 common mode rejection ratio 135 common mode voltage 135 compatibility 13 with RTD sensors 13 with SLC controllers 13 configuration word 52 63 80 135 configuring a channel 63 connection diagram 40 current consumption 34 117 cut off frequency 136 D data word 136 data resolution 74 data word format 74 bit description in configuration word 74 bit description in status word 84 dacling ranges by input type 72 dB 136 decibel 136 default setting of configuration word 63 diagnostics 99 at power up 100 channel diagnostics 100 differential mode rejection 137 digital filter 136 disabling a channel 77 door label 17 E effective resolution definition 136 electostatic damage 33 electrical noise 33 elect
73. ections below Where applicable rank the feature 1 needs improvement 2 satisfactory and 3 outstanding Overall Usefulness 1 2 9 How can we make this publication more useful for you 2 3 Can we add more information to help you Completeness all necessary information procedure step illustration feature is provided mE example guideline other explanation definition Technical Accuracy 1 2 3 Can we be more accurate all provided information is correct text illustration Clarity 1 2 3 How can we make things clearer all provided information is easy to understand Other Comments You can add additional comments on the back of this form Your Name Your Title Function Would you like us to contact you regarding your comments Location Phone ___No there is no need to contact me Yes please call me Yes please email me at Yes please contact me via Return this form to Rockwell Automation Technical Communications 1 Allen Bradley Dr Mayfield Hts OH 44124 9705 Fax 440 646 3525 Email RADocumentComments ra rockwell com Publication ClG C0521C EN P May 2003 PN957782 91 PLEASE FASTEN HERE DO NOT STAPLE Other Comments PLEASE FOLD HERE NO POSTAGE NECESSARY IF MAILED IN THE UNITED STATES BUSINESS REPLY MAIL FIRST CLASS MAIL PERMIT NO 18235 CLEVELAND OH POSTAGE WILL BE PAID BY THE ADDRESSEE Allen Bradl
74. emoval EXP Waals 4 38 Terminal Vitine p dte qoa ereet ely eto Une o I ace deel en 40 Calibration ua s ea UC oR RE RAG eb de ee i 47 Chapter 4 Module Codes sercar ri Eneng Soh a EG ALEGE CS 51 Module Addressing nannan anaa 52 Channel Filter Frequency Selection su od uae Ep o o en 54 Scanning Process and Channel Timing 58 Channel Turn on Turn off and Reconfiguration Time 61 Response to Slot Disable ino quoq de sedes o co 61 Chapter 5 Channel Configuration i e eu wad s atc Y ead dca rie dd 63 Channel Configuration Procedure 00004 64 Channel Data Word amp uuum eto tr PIRE co 3 81 Channel Status Checking 2 aae ree er tee toad 82 Publication 1746 UMO008B EN P December 2006 6 Table of Contents Ladder Programming Examples Module Diagnostics and Troubleshooting Application Examples Specifications RTD Standards Configuration Worksheet for RTD Resistance Module 1 0 Configuration Publication 1746 UMO008B EN P December 2006 Chapter 6 Device CODI EOD visu aie de ota tad Ae A dated 87 Initial PiOmrimintinecc e446 etch Seas ealeee 2a peak Sess 88 Dynamic Programming 42 4 oor qa Reet eS Y Ere es Ks 91 Verify Channel Configuration Changes 92 Interface to the PID Instruction acc ccs vy eve RON ESTA 93 Use the Proportional Counts Data Format with Liserset Sealing s tus ed ols ended Ades te e eto e ies 95 Monitor Channel Status Bits soar atey praep CX
75. en 0 60 C Where DT is the temperature difference between the actual operating temperature of the module and 25 C 140 F and 0 034 C C is the temperature drift shown in the table above for 100 Qor 200 Qplatinum RTDs Module accuracy is 1 0 C after you apply power to the module or perform an autocalibration at 60 C 140 F ambient with module operating temperature at 60 C 140 F Publication 1746 UMO008B EN P December 2006 122 Specifications Resistance Input Specification Resistance Device Compatibility Input Type Resistance Range Resistance Range Accuracy Temperature Resolution Repeatability 0 5 mA Excitation 2 0 mA Excitation Drift 150A OAto 150A OAto 150A 2 3 0 01 A X0 4 A 500A O0Ato500A 0 Ato 500A X0 5A X0 014 A C 0 1A X0 2A X 0 025 A F Resistance 1000 A 0 Ato 1000 A 0 Ato 1000 A X1 0A X 0 029 A C 0 1A X0 2A X 0 052 A F 3000 A 0 Ato 3000 A 0 A to 1900 A X15A X 0 043 A C 0 1A X0 2A X 0 077 A F f The accuracy value assumes that the module was calibrated within the specified temperature range of 0 60 C 32 140 F 2 The accuracy for 150 Qis dependent on the excitation current X 0 2 Qat 0 5 mA X 0 15 Qat 2 0 mA B The temperature drift for 150 Qis dependent on the excitation current X 0 006 Q C at 0 5 mA X 0 004 Qat 2 0 mA Cable Specifications Description Belden 9501 Belden 9533 Belden 83503
76. eory 11 types 11 119 S sampling time 138 scaled for PID 67 scaling 78 self locking tabs 17 shield connections 41 Index 141 single point calibration 48 slot disabling 61 specifications 117 122 cable 122 electrical 117 module accuracy 119 start up instructions 23 status word 82 138 step response 138 system operation 18 T temperature units 76 bit description in configuration word 76 terminal pinout diagram 40 terminal wiring 40 2 wire RTD interconnection 41 3 wire RTD interconnection 41 4 wire RTD interconnection 41 tools required for installation 23 torque 42 terminal block screws 42 troubleshooting 99 LED examination 100 turn off time 61 turn on time 61 U under range error 86 fault bit 86 update time 138 channel update time 58 effects of filter time setting 54 module update time 59 W wiring 33 routing of wires 40 terminal wiring 40 shield connections 40 Publication 1746 UMO08B EN P December 2006 142 Index Publication 1746 UMO008B EN P December 2006 How Are We Doing AB Your comments on our technical publications will help us serve you better in the future Thank you for taking the time to provide us feedback Ty You can complete this form and mail or fax it back to us or email us at RADocumentComments ra rockwell com Pub Title Type SLC 500 RTD Resistance Input Module Cat No 1746 NR4 Pub No 1746 UMO08B EN P Pub Date December 2006 Part No XXXXXX XX Please complete the s
77. epresent real engineering units and do not require explanation The Scaled for PID selection allows you to directly interface RTD Data into a PID instruction without intermediate scale operations The Proportional Counts selection provides the highest display resolution but also require you to manually convert the channel data to real Engineering Units Default scaling can be selected for scaled for PID data format and proportional counts data format User set scaling can be selected for proportional counts data format For a description of default scaling see Scaled for PID and Proportional Counts Data Format For a description of user set scaling using proportional counts data format see page 67 The equations on page 71 show how to convert from Scaled for PID to Engineering Units Engineering Units to Scaled for PID Proportional Counts to Engineering Units and Engineering Units to Proportional Counts To perform the conversions you must know the defined temperature or resistance range for the channel s input type Refer to the Channel Data Word Format in the tables on pages 72 73 The lowest possible value for an input type is Sj ow and the highest possible value is Syicy Scaled for PID If the user selects scaled for PID as the data format the data word for that channel is a number between 0 16 383 Zero 0 corresponds to the lowest temperature value of the RTD type or the lowest resistance value Cohms The value 16 38
78. es Fahrenheit Select Publication 1746 UM008B EN P December 2006 Configuration Worksheet for RTD Resistance Module 129 Bits9 Filter Frequency 00 10 Hz 01 50 Hz 10 60 Hz 11 250 Hz and 10 Select Bit 11 Channel Enable 0 channel disabled 1 channel enabled Bit 12 Excitation Current 0 0 2 mA 120 5 mA Select Bit 13 Scaling Select 00 module defined 01 config words 4 amp 5 for 102 config words 6 amp 11 Not used and 14 scaling default scaling 7 for scaling config error Bit 15 Not Used 0 always make this setting 1 Actual value at 0 C 32 F is 9 04 Qper SAMA standard RC21 4 1966 2 Actual value at 0 C 32 F is 100 Qper DIN standard B Values are expressed in 0 1 degree step or 0 1 Q step applies to all pots except 150 Qtype For the 150 Q pot input type the values are expressed in 0 01 C step V Values are expressed in 1 degree step or 1 Q step applies to all pot except 150 Q type For the 150 Q pot input type the values are expressed in 0 1 Q step Publication 1746 UMO008B EN P December 2006 130 Configuration Worksheet for RTD Resistance Module Notes Publication 1746 UM008B EN P December 2006 1 0 Configuration Appendix D This section contains information on the I O configuration procedure for RSLogix 500 Version 6 0 and later software 1 Open the IO Configuration in RSLogix 500 software 2 Add the 1746 NR4 module
79. ey BRE DOGE 2 Rockwell Automation 1 ALLEN BRADLEY DR MAYFIELD HEIGHTS OH 44124 9705 PLEASE REMOVE Rockwell Automation Support www rockwellautomation com Rockwell Automation provides technical information on the Web to assist you in using its products At http support rockwellautomation com you can find technical manuals a knowledge base of FAQs technical and application notes sample code and links to software service packs and a MySupport feature that you can customize to make the best use of these tools For an additional level of technical phone support for installation configuration and troubleshooting we offer TechConnect Support programs For more information contact your local distributor or Rockwell Automation representative or visit http support rockwellautomation com Installation Assistance If you experience a problem with a hardware module within the first 24 hours of installation please review the information that s contained in this manual You can also contact a special Customer Support number for initial help in getting your module up and running United States 1 440 646 3223 Monday Friday 8am 5pm EST Outside United Please contact your local Rockwell Automation representative for any States technical support issues New Product Satisfaction Return Rockwell tests all of its products to ensure that they are fully operational when shipped from the manufacturing facility
80. ge 0 User set Scaling Range 1 Invalid Actua Actua Unused Unused value at 0 C 32 F is 9 072 Q per SAMA standard RC21 4 1966 value at 0 C 32 F is 100 Q per DIN standard Not used o o ol ol ol ol ol CO c Values are in 0 1 degree step or 0 1 step for all resistance types except 150 Q For the 150 Qresistance input type the values are in 0 01 Q step Values are in 1 degree step or 1 Q step for all resistance input types except 150 Q For the 150 Qresistance input type the values are in 0 01 2 step This bit is ignored when a resistance device is selected Applies to proportional counts data format selected using bits 4 and 5 Ensure unused bit 15 is always set to zero Publication 1746 UM008B EN P December 2006 o oj ol ojl o ol ol oln Channel Configuration Data and Status 67 Input Type Selection Bits 0 3 The input type bit field lets you configure the channel for the type of input device you have connected to the module Valid input devices are shown in the Channel Configuration Word O e 0 through O e 3 Bit Definitions table Data Format Selection Bits 4 and 5 The data format bit field lets you define the format for the channel data word contained in the module input image Valid data types are engineering units scaled for PID a
81. he analog input signal to reach 10096 of its expected final value This means that if an input signal changes faster than the channel step response a portion of that signal will be attenuated by the channel filter The table below shows the step response for each filter frequency Notch Frequencies Publication 1746 UMO008B EN P December 2006 Filter 50 Hz NMR 60 Hz NMR Cut off Step Frequency Frequency Response 10 Hz 100 dB 100 dB 2 62 Hz 300 ms 50 Hz 100 dB 13 1 Hz 60 ms 60 Hz 100 dB 15 72 Hz 50 ms 250 Hz 65 5 Hz 12 ms Preliminary Operating Considerations 55 Effective Resolution The effective resolution for an input channel depends upon the filter frequency selected for that channel This table displays the effective resolution for the various input types and filter frequencies Effective Resolution Input Type Filter Frequency 10 Hz 50 Hz 60 Hz 250 Hz 100 Q Pt RTD 385 30 1 C 30 2 C 0 2 C 0 4 C 0 2 F 0 4 F 0 4 F 0 7 F 200 QPt RTD 385 0 1 C 30 2 C 30 2 C 0 4 C 0 2 F 0 4 F 0 4 F 0 7 F 500 QPt RTD 385 0 1 C 30 2 C 30 3 C 0 4 C 0 2 F 0 4 F 0 5 F 0 7 F 1000 QPt RTD 385 1 0 1 C 0 2 C 0 2 C 0 4 C 0 2 F 0 4 F 0 4 F 0 7 F 100 QPt RTD 3916 1 0 1 C 0 2 C 0 2 C 0 3 C 0 2 F 0 4 F
82. he enabled channels The module is now operating in its normal state Each time a channel is read by the module that data value is tested by the module for a fault condition for example open circuit short circuit over range and under range If such a condition is detected a unique bit is set in the channel status word and the channel status LED indicator blinks indicating a channel error condition The SLC processor reads the converted RTD or resistance data from the module at the end of the program scan or when commanded by the ladder program The processor and RTD module determine that the backplane data transfer was made without error and the data is used in your ladder program Module Operation Each input channel consists of an RTD connection which provides e excitation current e a sense connection which detects lead wire resistance e a return connection which reads the RTD or resistance value Each of these analog inputs are multiplexed to one of two analog convertors Publication 1746 UMO008B EN P December 2006 20 Overview The A D convertors cycle between reading the RTD or resistance value the lead wire resistance and the excitation current From these readings an accurate temperature or resistance is returned to the user program The RTD module is isolated from the chassis backplane and chassis ground The isolation is limited to 500V dc Optocouplers are used to communicate across the isolation barr
83. he module converts the RTD readings into linearized digital temperature readings in C or F When configured for resistance inputs the module provides a linear resistance value in ohms IMPORTANT The RTD module is designed to accept input from RTD sensors with up to three wires When using 4 wire RTD sensors one of the two lead compensation wires is not used and the 4 wire sensor is treated like a 3 wire sensor Lead wire compensation is provided via the third wire See NR4 Wiring Considerations on page 40 for more information Overview 19 System Operation The RTD module has three operational states e Cycle power e Module operation e Error module error and channel error Cycle Power When you cycle the module s power the RTD module checks its internal circuits memory and basic functions via hardware and software diagnostics During this time the module status LED indicator remains off If no faults are found during the diagnostics the module status LED indicator is on After the checks are complete the RTD module waits for valid channel configuration data from your SLC ladder logic program channel status LED indicators off After configuration data is written to one or more channel configuration words and their channel enable bits are set by the user program the channel status LED indicators go on and the module continuously converts the RTD or resistance input to a value within the range you selected for t
84. ield X RTD Add J Shield umper N RTD ChoRTD oe gt A O DIU Sense H Terminal Pin outs Return Return Ch 0 Return Gl e Belden 9501 Shielded Cable Shield CHIO Shield RTD chit Three wire RTD Interconnection Cable Shield cug RTD Sense Chl 1 S RTD ChlO Sense Shield Return chi 1 G9 RTD Return Ch 0 RTD un ub EC P DM RON Shield chos Sense Sense ch 2 Shield h 0 Sense LLL gt Chl 3 Retum V L orm Chi2 RTD Ch 0 Return X re xwIMCOe ee Sense Chl 3 Belden 83503 or Belden 9533 Shielded Cable Chl2 Sense Return Chl 3 Shield Return Four wire RTD Interconnection Cable Shield Shield RTD Shield IQ RTD ChORTD amo Sense Ch 0 Sense aaa vinh Return Return a Ch 0 Return ol SLMALM Belden 83503 or Belden 9533 Shielded Cable O Leave one sensor wire open p di Publication 1746 UMO008B EN P December 2006 Install and Wire the Module 43 When using a three wire configuration the module compensates for resistance error due to lead wire length For example in a three wire configuration the module reads the resistance due to the length of one of the wires and assumes that the resistance of the other wire is equal If the resistances of the individual lead wires are much different an error may exist The closer the resistance values are to each other the greater the amount of er
85. ier Channel to channel common mode isolation is limited to X 1 volt LED Indicator Status The following figure shows the RTD module LED indicator panel consisting of five LED indicators The state of the LED indicators for example off on or blinking depends on the operational state of the module See the LED Indicator Status table on page 21 LED Indicators PA cHanneL Lo STATUS MobuLe status _ __ RTD resistance The purpose of the LED indicators is to provide Channel Status One LED indicator for each of the four input channels indicates if the channel is enabled disabled or is not operating as configured due to an error Module Status If OFF at any time other than when you cycle module power this LED indicator indicates that non recoverable module errors for example diagnostic or operating errors have occurred The LED indicator is ON if there are no module errors Publication 1746 UMO008B EN P December 2006 Overview 21 The status of each LED indicator during each of the operational states for example powerup module operation and error is depicted in the following table LED Indicator Status LED Indicator Cycle Module Operation Module Error Channel Power No Error Error ChOStts lom Tonoa Of Blins Ch 1 Status or On Off Off Blinks Ch 2 Status ort On Off Off Blinks Ch 3 Status ort On Off Off Blinks Mod Status orf
86. iguration word when the channel is enabled If the channel is disabled these bits are cleared 0 Temperature Units Status Bit 8 The temperature units field indicates the state of the temperature units bit in the configuration word bit 8 This feature is only active for RTD input types with the channel enabled This bit is cleared 0 if the channel is disabled or if the input type is a resistance device such as potentiometer Channel Configuration Data and Status 85 Channel Filter Frequency Bits 9 and 10 The channel filter frequency bit field reflects the filter frequency you selected in bits 9 10 of the configuration word when the channel is enabled This feature is active for all input types If the channel is disabled these bits are cleared 0 Channel Enable Status Bit 11 The channel enable status bit indicates whether the channel is enabled or disabled This bit is set 1 when the channel enable bit is set in the configuration word bit 11 and there is valid data in the channel s data word The channel status bit is cleared 0 if the channel is disabled Excitation Current Bit 12 This bit indicates the excitation current setting made to bit 12 of the channel s configuration word when the channel is enabled If the channel is disabled this bit is cleared 0 Broken Input Error Bit 13 This bit is set 1 whenever an enabled channel detects a broken input condition A broken input error is declared fo
87. input type is indicated Channel Configuration correctly in bits 0 3 Error Refer to the troubleshooting flowchart on page 7 6 and chapter 5 for more information Off Power Up No action required Channel Not Enabled No action required For an example of how to enable a channel refer to chapter 6 Ladder Programming Examples The Module Status LED Indicator State table explains the function of the module status LED indicator Module Status LED Indicator State If Module Indicated Condition Corrective Action Status LED Indicator is On Proper Operation No action required Off Module Fault Cycle power If condition persists replace the model or call your local distributor or Allen Bradley for assistance I O error codes are reported in word S 6 of the SLC processor status file The characters denoted as XX represent the slot number Hex for the module The characters denoted as YY represent the 2 digit hex code for the fault condition The format for the error codes in the status word S 6 is shown in the Error Code Format diagram on page 102 Publication 1746 UMO008B EN P December 2006 102 Module Diagnostics and Troubleshooting Error Codes Publication 1746 UM008B EN P December 2006 The error codes applicable to the RTD module range from 50H to 5AH These are non recoverable errors For a description of the error codes refer to SLC 500 Instruction Set Reference Manual Publicatio
88. iometer wiper arm can be connected to either the RTD or return terminal depending on whether the user wants increasing or decreasing resistance RTD Potentiometer Belden 9501 Shielded Cable Publication 1746 UM008B EN P December 2006 Install and Wire the Module 45 Shield Chl 0 RTD Chl 0 Sense Chl 0 Return Shield Chl 0 RTD Chl 0 Sense Chl 0 Return Return Three wire Potentiometer Connections To Terminal Block Cable Shield NE Run RTD and sense wires from module to potentiometer terminal and tie them to one point RTD Potentiometer Sense SIRE RE Belden 83503 or Belden 9533 Shielded Cable Potentiometer wiper arm can be connected to either the RTD or return terminal depending on whether the user wants increasing or decreasing resistance Cable Shield Run RTD and sense wires from module to potentiometer terminal and tie them to one point RTD Potentiometer Sense Belden 83503 or Belden 9533 Shielded Cable Publication 1746 UMO008B EN P December 2006 46 Install and Wire the Module Follow these steps to wire your 1746 NR4 module 1 At each end of the cable strip some casing to expose the individual wires 2 Trim the signal wires to 5 08 cm 2 in lengths Strip about 4 76 mm 3 16 in
89. ion 1746 UM008B EN P December 2006 Application Examples 109 0000 100 Q Pt 385 0110 500 QPt 3916 0001 200 Q Pt 385 0111 1000 OPC 3916 1100 150 OPPotentiometer Bits nut Toe Selected 0010 500 Q Pt 385 1000 10 Q Cu 426 1001 500 Q Potentiometer 0 3 pute 0011 1000 Pt 385 1001 120 QNi 618 1110 1000 Potentiometer 0100 100 Q Pt 3916 1010 120 QNi 672 1111 3000 Potentiometer 0101 200 Q Pt 3916 1011 604 QNi Fe 518 Bits 4 Data Format Select 00 engineering units x 19 10 scaled for PID 0 16 383 and 5 01 engineering units x10 11 proportional counts 32 768 32 767 oe Broken Input Select 00 zero 01 upscale 10 downscale 11 invalid Bits 8 Kopera unis 0 degrees Celsius 1 F Select Bits 9 Eiter Hequeney qiagcqpup 01 50 Hz 10 60 Hz 11 invalid and 10 Select Bit 11 Channel Enable 0 channel disabled 1 channel enabled Bit 12 Excitation Current 0 20 mA 1 05mA Select Bit 13 Scaling Select 00 module defined scaling 01 config words 4and 5 10 config words 11 Not used config and 14 g default for scaling 6 and 7 for scaling error Bits 15 Not Used 0 always make this setting 1 Actual value at 0 C 32 F is 9 042 Qper SAMA standard RC21 4 1966 2 Actual value at 0 C 32 F is 100 Qper DIN standard B Values are 0 1 step or 0 102 step for all resistance input
90. ion 1746 UMO008B EN P December 2006 Channel Cut off Frequency The channel filter frequency selection determines a channel s cut off frequency also called the 3 dB frequency The cut off frequency is defined as the point on the input channel frequency response curve where frequency components of the input signal are passed with 3 dB of attenuation All frequency components at or below the cut off frequency are passed by the digital filter with less than 3 dB of attenuation All frequency components above the cut off frequency are increasingly attenuated as shown in the following figures The cut off frequency for each input channel is defined by its filter frequency selection The Notch Frequencies table shows the input channel cut off frequency for each filter frequency Choose a filter frequency so that your fastest changing signal is below that of the filter s cut off frequency The cut off frequency should not be confused with update time The cut off frequency relates how the digital filter attenuates frequency components of the input signal The update time defines the rate at which an input channel is scanned and its channel data word updated See page 58 for determining the channel update time 10 Hz Filter Notch Frequency 3 dB mM 80 Amplitude in dB 10 l 120 140 160 180 200 0 10 20 30 40 50 60 Hz Frequency 2 62 Hz Frequency Response Preliminary Operating Considerations
91. ion parameters for channel 0 into integer N10 0 In this example all the bits of N10 0 are zero except for the channel enable N10 0 11 Program an instruction in your ladder logic to copy the contents of N10 0 to output word O 1 0 See Output Image Detail on page 28 For more information refer to chapter 6 Ladder Programming Examples and chapter 8 Application Examples Initial Configuration Word Setting z Data File N10 bin MOD CONFIG I CE Cl ES ee S A 3 oa 0 Symbol Description 0000100000002 00 0 MJ KT HE N10 0 0 Radix Binary Y Symbol Columns fi 6 Desc wo 4 Properties Usage Help First Pass Bit 8 1 COP On powerzup the first pass bit E COPY FILE 1 15 is set for one scan enabling 15 Source N10 0 the COPY instruction that transfers a one to bit 11 of channel configuration Dest 0 1 0 word 0 This enables channel 0 Length 1 which directs the RTD module to scan Publication 1746 UM008B EN P December 2006 channel 0 and to present the analog data to the SLC processor Quick Start Guide 31 Write Remaining Ladder Logic The Channel Data Word contains the information that represents the temperature value or resistance value of the input channel Write the remainder of the ladder logic program that specifies how your RTD resistance input data is processed for your application In this procedure the addressing reflects the
92. isplay the channel data word in degrees Celsius 1 Degrees Fahrenheit Display the channel data word in degrees Fahrenheit Filter Frequency Selection Bits 9 and 10 The Bit Descriptions for Filter Frequency Selection table shows the descriptions for bits 9 and 10 The channel filter frequency bit field lets you select one of four filters available for a channel The filter frequency affects the channel update time and noise rejection characteristics refer to chapter 4 for details Bit Descriptions for Filter Frequency Selection Binary Select Description Value 00 10Hz Provide both 50 Hz and 60 Hz ac line noise filtering This setting increases the channel update time but also increases the noise rejection 01 50 Hz Provide 50 Hz ac line noise filtering 10 60Hz Provide 60 Hz ac line noise filtering 11 250 Hz Provide 250 Hz ac noise filtering This setting decreases the noise rejection but also decreases the channel update time Channel Enable Selection Bit 11 The Bit Descriptions for Channel Enable Selection table shows the description for bit 11 You use the channel enable bit to enable a channel The RTD module only scans those channels that are enabled To optimize module operation and minimize throughput times you should disable unused channels by setting the channel enable bit to zero Channel Configuration Data and Status 77 When set 1 the channel enable bit is used by the mod
93. it being used e Wrong RTD unit used for type configuration selected e Bad potentiometer or RTD unit e Signal input from either potentiometer or RTD unit is beyond the user set scaling range Module Status LED Indicator Green The module status LED indicator is used to indicate module related diagnostic or operating errors These non recoverable errors may be detected when you apply power or during module operation Once in a module error state the RTD module no longer communicates with the SLC processor Channels are disabled and data words are cleared 0 Failure of any diagnostic test places the module in a non recoverable state To exit this state cycle power If the power cycle does not work then call your local distributor or Rockwell Automation for assistance Publication 1746 UM008B EN P December 2006 Module Diagnostics and Troubleshooting 105 Troubleshooting Flowchart Check LED indicators on module i Y Y j Y Channel Status Module Status Module Status Channel Status chaine Sue LED indi ad E 3 LED indicators LED indicator indicator LED indicator is off LED indicator is on PET i blinking is off Is on Module fault Normal module 1 Channel is Channe
94. it for range 0 15 0 0 e 6 Defines lower scale limit for range 1 Range 1 15 i D 0 e 7 Defines upper scale limit for range 1 15 0 Publication 1746 UM008B EN P December 2006 Channel Configuration Data and Status 81 Channel Data Word Unused Bit 15 Bit 15 is not used Verify that this bit is always cleared 0 The actual RTD or resistance input sensor values reside in I e 0 through I e 3 of the RTD module input image file The data values present depend on the input type and data format you have selected in your configuration for the channel When an input channel is disabled its data word is reset 0 Two conditions must be true for the value of the data word shown in the Module Input Image Data Word to be valid e The channel must be enabled channel status bit 1 e There must be no channel errors channel error bit 0 Module Input Image Data Word l e 0 CH 0 Data Word 15 0 I e 1 CH 1 Data Word 15 0 l e 2 CH 2 Data Word 15 0 l e 3 CH 3 Data Word 15 0 Publication 1746 UMO008B EN P December 2006 82 Channel Configuration Data and Status Channel Status Checking Publication 1746 UM008B EN P December 2006 The channel status word is a part of the RTD module s input image Input words 4 7 correspond to and contain the configuration status of channels 0 1 2 and 3 respectively You can use the data provided in the status w
95. jumper b Chi 0 RTD Chl 0 Sense Chl 0 Return Belden 9501 Shielded Cable Three Wire RTD Interconnection Cable Shield Q Lo Shield Chl 0 RTD OA CO Sense Sense Chl 0 Sense o C9 Return Return EY Chl 0 Return c oe EE Belden 83503 or Belden 9533 Shielded Cable Four Wire RTD Interconnection Cable Shield 4 Shield Chl 0 RTD Chl 0 Sense a Return J Return Y Chl ORetum S 9 Belden 83503 or Belden 9533 Shielded Cable O Leave one sensor wire di Terminal Pin outs Shield CHIO Shield RTD Tend Chio PTP Sense p 1 ChiO Sense Return chy 1 Return Shield ChI 2 Shield RTD Chi 3 Chi2 RTD Sense 3 Chl2 Sense Return Chl 3 Shield Return Shield Publication 1746 UMO008B EN P December 2006 Quick Start Guide 27 Add jumper Shield N Chl 0 RTD Chl 0 Sense Chl 0 Return Shield Chl 0 Sense Chl 0 Return Two wire Potentiometer Connections to Terminal Block For details on wiring an RTD unit to the module see chapter 3 C
96. l is enabled condition operation Fault not enabled and working condition properly Check to see End Check channel Enable channel if that module is desired by setting status word seated properly bits 13 15 channel config in chassis ud word bit 11 1 Cycle power Retry LLL End Configuration error Check configuration word bits 0 3 for valid input type _ Bit15 con iguration bits 13and 14 p set 1 for valid scale select setting and bits 6 and 7 for valid Broken Input select setting Retry Out of range error indicating that either an over range or Yes under range condition exists 3 For over range the input Is deat End I a _ signal is greater than the Is problem corrected high scale limit for the corrected channel For under range No the input signal is less than the low scale limit for the No channel Correct and retry An open circuit or pied local short circuit RTD condition EA Contact your local istributor or ans is present Check channel distributor or Rockwell Lp gt for open or loose Rockwell Automation set 1 connections RTD and Automation potentiometer inputs and check channel for short circuit condtion RTD only Retry Publication 1746 UMO008B EN P December 2006 106 Module Diagnostics and Troubleshooting Replacement Parts The RTD module has the following replaceable parts Parts List Part Part Number Replacement Terminal Block 1746
97. les 97 Invoke Autocalibration Autocalibration of a channel occurs whenever e a channel first becomes enabled e when a change is made to its input type filter frequency or excitation current e whenever an operating channel is disabled and re enabled using its enable bit Referring to Programming to Monitor Channel Status on page 96 you can command your module to perform an autocalibration cycle by disabling a channel waiting for the status bit to change state 1 0 and then re enabling that channel TIP To maintain system accuracy we recommend that you periodically perform an autocalibration cycle at these times e Whenever an event occurs that greatly changes the internal temperature of the control cabinet such as opening or closing its door e Ataconvenient time when the system is not making product such as during a shift change ATTENTION Several channel cycles are required to perform an l autocalibration and it is important to remember that during autocalibration the module is not converting input data This ladder diagram show you how to command the RTD module to perform an autocalibration of channel 0 The RTD module is in slot 3 Publication 1746 UM008B EN P December 2006 98 Ladder Programming Examples Programming to Invoke Autocalibration Rung 2 0 Rung 2 1 Condition for Channel 0 Enable Autocalibration I 1 B3 0 3 0 t OSR U 1 0 11 Channel 0 Flag B3 L
98. lication 1746 UMO008B EN P December 2006 96 Ladder Programming Examples Monitor Channel Status Bits Rung 2 0 Rung 2 1 Rung 2 2 Rung 2 3 Rung 2 4 Rung 2 5 Publication 1746 UM008B EN P December 2006 The Programming to Monitor Channel Status ladder diagram shows how you could monitor the open and short circuit error bits of each channel and set an alarm in the processor if one of the RTDs or resistance input devices such as a potentiometer opens or shorts An open circuit error can occur if the RTD or resistance input device breaks or one of the RTD or resistance input device wires get cut or disconnected from the terminal block A short circuit condition applies only to RTD input Programming to Monitor Channel Status First Pass Bit Initialize RTD module S 1 CoR t COPY FILE 15 Source N10 0 Dest 0 3 0 Length 4 Channel 0 Channel 0 Channel 0 Status Open or Short Alarm I 3 4 I 3 4 0 2 0 f E 11 13 0 Channel 1 Channel 1 Channel 1 Status Open or Short Alarm I 3 5 I 3 5 0 2 0 1 t E 1 11 13 1 Channel 2 Channel 2 Channel 2 Status Open or Short Alarm I 3 6 I 3 6 0 2 0 3J f E 11 13 2 Channel3 Channel 3 Channel 3 Status Open or Short Alarm 367 I 3 7 0 2 0 t E 11 13 3 L1 HE N10 0 0 Radix Binary S Symbol Columns fis y wo m Properties Usage Help Ladder Programming Examp
99. mA Excitation Rosoluton Repeatability 100 Q 200 850 C 200 850 C 0 1 C 0 2 C 328 1562 F 328 1562 F 0 2 F 0 4 F 200 2 200 850 C 200 850 C 0 1 C 30 2 C 328 1562 F 328 1562 F 0 2 F 0 4 F Platinum 385 500 Q 200 850 C 200 850 C 0 1 C 30 2 C 328 1562 F 328 1562 F 0 2 F 0 4 F 1000 Q 200 850 C 200 850 C 0 1 C 30 2 C 328 1562 F 328 1562 F 0 2 F 0 4 F 100 200 630 C 200 630 C 0 1 C 30 2 C 328 1166 F 328 1166 F 0 2 F 20 4 F 200 2 200 630 C 200 630 C 0 1 C 30 2 C 328 1166 F 328 1166 F 0 2 F 20 4 F Platinum 3916 500 2 200 630 C 200 630 C 0 1 C 30 2 C 328 1166 F 328 1166 F 0 2 F 0 4 F 1000 Q 200 630 C 200 230 C 0 1 C 0 2 C 328 1166 F 328 446 F 0 2 F 0 4 F 10 Q 5 100 260 C 0 1 C 30 2 C a2 Not allowed Copper 416 148 500 F 0 2 F 40 4 F Publication 1746 UMO008B EN P December 2006 120 Specifications RTD Temperature Ranges Resolution and Repeatability Temp Range Temp Range E RTD T Resolut R tabil ype 0 5 mA Excitation 2 0 mA Excitation PSO MON epeatabiiity 120 2 100 260 C 100 260 C 0 1 C 0 2 C 1 3 Nickel 618 148 500 F 148 500 F 0 2
100. mmon Techniques Used in This Manual procedural steps The following conventions are used throughout this manual e Bulleted lists such as this one provide information not e Numbered lists provide sequential steps or hierarchical information e Text in this font indicates words or phrases you should type Publication 1746 UMO008B EN P December 2006 10 Preface Notes Publication 1746 UM008B EN P December 2006 Description Chapter 1 Overview This chapter describes the four channel 1746 NR4 RTD Resistance Input Module and explains how the SLC controller gathers RTD Resistance Temperature Detector temperature or resistance initiated analog input from the module Included is e a general description of the module s hardware and software features e an overview of system operation For the rest of the manual the 1746 NR4 RTD Resistance Input Module is referred to as simply the RTD module The RTD module receives and stores digitally converted analog data from RTD units or other resistance inputs such as potentiometers into its image table for retrieval by all fixed and modular SLC 500 processors An RTD module consists of a temperature sensing element connected by two three or four wires that provide input to the RTD module The module supports connections from any combination of up to four RTD units of various types for example platinum nickel copper or nickel iron or other resistance input
101. mperature coefficient resistor Install and Wire the Module 49 Use the RTD module to determine the temperature equivalent to the fixed precision resistor and cable combination Calculate the offset value by subtracting the calculated calibration temperature from the measured temperature Reconnect the RTD to the cable Use ladder logic to apply subtract the offset from the measured temperature to obtain corrected temperature Publication 1746 UMO008B EN P December 2006 50 Install and Wire the Module Notes Publication 1746 UM008B EN P December 2006 Module ID Code Chapter 4 Preliminary Operating Considerations This chapter explains how the RTD module and the SLC processor communicate through the module s input and output image It lists the preliminary setup and operation required before the RTD module can function in a 1746 I O system Topics discussed include how to e enter the module ID code e address your RTD module e select the proper input filter for each channel e calculate the RTD module update time e interpret the RTD module response to slot disabling The module identification code is a unique number encoded for each 1746 I O module The code defines for the processor the type of I O or specialty module residing in a specific slot in the 1746 chassis To manually enter the module ID code select other from the list of modules on the system I O configuration display The mo
102. n 1747 RMO001 Error Code Format XX Chassis Slot Number Hex YY Error Code Hex Channel Status LED Indicators Green The channel LED indicator is used to indicate channel status and related error information contained in the channel status word This includes conditions such as the following e Normal operation Channel related configuration errors e Broken input circuit errors such as open or short circuit RTD units only e Out of range errors All channel errors are recoverable errors and after corrective action normal operation resumes Invalid Channel Configuration Whenever a channel s configuration word is improperly defined the channel LED indicator blinks and bit 15 of the channel status word is set Configuration errors occur for the following invalid combinations e Input type is a 10 Q Copper RTD and the excitation current is set for 0 5 mA which is not allowed e Scaling select bits 13 and 14 are set to 11 which is invalid Broken Input select bits 6 and 7 are set to 11 which is invalid e Scaling select bits 13 and 14 are set to 01 or 10 and scaling limit words 0 e Data format bits are set to 11 proportional counts the scaling select bits are set to 01 or 10 and the lower limit user set scale word is greater than or equal to the upper limit user set scale word Module Diagnostics and Troubleshooting 103 Open and Short circuit Detection An open or short circui
103. ncy are enabled Module Update Time 4 _ 305 ms 1220 ms Publication 1746 UMO008B EN P December 2006 60 Preliminary Operating Considerations Scanning Cycle Channel 1 Channel 0 J Start Update Channel 1 data word Calculate Channel 1 data Wait for Channel 0 A D conversion Configure and start Channel 0 A D Read Channel 1 A D Read Channel 0 A D Configure and start Channel 1 A D Wait for Channel 1 A D conversion Calculate Channel 0 data Update Channel 0 data word Scan Cycle With Channels 0 and 1 Enabled Only Publication 1746 UM008B EN P December 2006 Preliminary Operating Considerations 61 Channel Turn on Turn off and Reconfiguration Time Function Turn on Time Description The time it takes to make converted data available in the data word and to set the status bit transition from 0 to 1 in the status word after setting the enable bit in the configuration word The table below gives you the turn on turn off and reconfiguration times for enabling or disabling a channel Duration Requires up to one module update time plus one of the following e 250 Hz Filter 388 ms e 60 Hz Filter 1300 ms e 50 Hz Filter 1540 ms e 10 Hz Filter 7300 ms Turn off Time The time it takes to reset the status bit transition from 1 to 0 in the status word and to zero the data word after resetting the enable bit in the configuration word Requires up
104. nd proportional counts If you select proportional counts you have the option of using user set scaling bits 13 and 14 Table Channel Configuration Word O e 0 through O e 3 Bit Definitions to define an optimum range for your application Unless you specify otherwise the data will be scaled to the full scale range for that channel Bit Descriptions for Data Format Select Binary Select Description Value 00 Engineering units x 1 Expresses values in 0 1 or 0 1 Qfor 150 Qpot only 01 Engineering units x10 Express values in 1 or 1 Qor 0 1 Qfor 150 Q pot only 10 Scaled for PID The input signal range for the selected input type is its full scale input range The signal range is scaled into a 0 16 383 range which is what the SLC processor expects in the PID function 11 Proportional counts The input signal range is proportional to your selected input type and scaled into a 32 168 32 767 range default or user set range based on the scaling select bits 13 and 14 an scale limit words 0 e 4 0 e 5 or 0 e 6 0 e 7 Publication 1746 UMO008B EN P December 2006 68 Channel Configuration Data and Status Publication 1746 UM008B EN P December 2006 Using Scaled for PID and Proportional Counts Formats The RTD module provides eight options for displaying input channel data These are 0 1 F 0 1 C 1 F 1 C 0 1 Q 1 Q Scaled for PID and Proportional Counts The first six options r
105. ndards in whole or in part documented in a technical construction file e EN 50081 2 EMC Generic Emission Standard Part 2 Industrial Environment e EN 50082 2 EMC Generic Immunity Standard Part 2 Industrial Environment This product is intended for use in an industrial environment Electrostatic discharge can damage semiconductor devices inside this module if you touch backplane connector pins or other sensitive areas Guard against electrostatic damage by observing the precautions listed next Electrostatic discharge can degrade performance or cause permanent damage Handle the module as stated below Wear an approved wrist strap grounding device when handling the module Publication 1746 UMO008B EN P December 2006 34 Install and Wire the Module NR4 Power Requirements Publication 1746 UM008B EN P December 2006 e Touch a grounded object to rid yourself of electrostatic charge before handling the module e Handle the module from the front away from the backplane connector Do not touch backplane connector pins e Keep the module in its static shield bag when not in use or during shipment The RTD module receives its power through the SLC 500 chassis backplane from the fixed or modular 5V dc 24V dc chassis power supply The maximum current drawn by the module is shown in the table below 5V dc Amps 24V dc Amps 0 050 0 050 When you are using a modular system configuration add the values
106. odule Chilled Temperature to Display TOD TO BCD Source I 1 3 Dest 0 6 0 END Specifications Appendix A This appendix lists the specifications for the 1746 NR4 RTD Input Module 1746 NR4 Electrical Specifications Backplane current consumption Backplane power consumption 50 mA at 5V dc 50 mA at 24V dc 1 5 W max 0 3 W at 5V dc 1 2 W at 24V dc External power supply requirements None Number of channels 4 backplane isolated 1 0 chassis location Any 1 0 module slot except slot 0 A D conversion method Sigma delta modulation Input filtering Low pass digital filter with programmable notch filter frequencies Common mode rejection between inputs and chassis ground 150 dB at 50 Hz 10 Hz and 50 Hz filter frequencies 150 dB at 60 Hz 10 Hz and 60 Hz filter frequencies v Normal mode rejection between input and input gt 100 dB at 50 Hz 10 Hz 50 Hz filter frequencies gt 100 dB at 60 Hz 10 Hz 60 Hz filter frequencies Max common mode voltage 1 volt Max allowed permanent overload Volts 5V dc Current 5 mA Input filter cut off frequencies 2 62 Hz at 10 Hz filter frequency 13 1 Hz at 50 Hz filter frequency 15 72 Hz at 60 Hz filter frequency 65 5 Hz at 250 Hz filter frequency Calibration Module auto calibrates when a channel is enabled or when a change is made to its inp
107. odule Status LED indicator is off or if the Channel 0 LED indicator is off or blinking refer to chapter 7 For more information see chapter 5 chapter 7 and chapter 8 Monitoring Status SLC 500 Controller P di Data Files Input Image 8 words Output Image s Blsiz 2 ala ElSe S z Word 0 Channel 0 Data Word seslal a alel F Word 1 Channel Data Word Sc S55 E a 2 Word 2 Channel 2 Data Word 2 e 8 5 8 B E e amp Word 3 Channel 3 Data Word SjSjs 55 eg E Channel 0 Status Word lt _0 0 ol 0 1 0 0 0 0 0 0 of of of 0 O Channel 1 Status Word Bit15 Address Bit 0 Channel 2 Status Word 1 4 Word 7 Channel 3 Status Word For this example only bit 11 is set during normal operation EMC Directive Electrostatic Damage Chapter 3 Install and Wire the Module This chapter tells you how to e avoid electrostatic damage e determine the RTD module s chassis power requirement e choose a location for the RTD module in the SLC chassis e install the RTD module e wire the RTD module s terminal block If this product has the CE mark it is approved for installation within the European Union and EEA regions It has been designed and tested to meet the following directives This product is tested to meet Council Directive 89 336 EEC Electromagnetic Compatibility EMC and the following sta
108. odules with power applied to the chassis or devices wired to the module To avoid cracking the removable terminal block alternate the removal of the slotted terminal block release screws 1 Loosen the two terminal block release screws Terminal Block Release Screws Max Torque 0 6 Nm 5 3 in Ibs OOOO G9 G9 C 2 Grasp the terminal block at the top and bottom and pull outward and down Install and Wire the Module 39 Install the Module 1 Align the circuit board of the RTD module with the card guides located at the top and bottom of the chassis fol 8 ud ES WM WH MSS Top and Bottom Module Release s 2 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 all unused slots with the Card Slot Filler catalog number 1746 N2 Remove the Module 1 Press the releases at the top and bottom of the module and slide the module out of the chassis slot 2 Cover all unused slots with the Card Slot Filler Catalog Number 1746 N2 Publication 1746 UMO008B EN P December 2006 40 Install and Wire the Module Terminal Wiring Publication 1746 UM008B EN P December 2006 The RTD module contains an 18 position
109. on Repeatability 0 5 mA excitation 2 0 mA excitation 100 Q 200 850 C 200 850 C 0 1 C 0 2 C 328 1562 F 328 1562 F 0 2 F 40 4 F 200 Q 200 850 C 200 850 C 0 1 C 0 2 C 328 1562 F 328 1562 F 0 2 F 0 4 F Platinum 3852 500 Q 200 850 C 200 850 C 0 1 C 0 2 C 328 1562 F 328 1562 F 0 2 F 40 4 F 1000 Q 200 850 C 200 240 C 0 1 C 0 2 C 328 1562 F 328 464 F 0 2 F 40 4 F 100 200 630 C 200 630 C 1 C 0 2 C 328 1166 F 328 1166 F 0 2 F 40 4 F 200 Q 200 630 C 200 630 C 1 0 2 C T 328 1166 F 328 1166 F 0 2 F 0 4 F Platinum 3916 RUIN 500 Q 200 630 C 200 630 C 1 0 2 C 328 1166 F 328 1166 F 0 2 F 40 4 F 1000 Q 200 630 C 200 630 C 0 1 0 2 C 328 1166 F 328 446 F 0 2 F 40 4 F Copper 476213 10Q Not allowed 100 260 C 01 0 2 C Bp b 148 500 F 0 2 F 20 4 F 25 1200 100 260 C 100 260 C 0 1 C 40 1 C WKE NGE 148 500 F 148 500 F 0 2 F 20 2 F 2 1200 80 260 C 80 260 C 0 1 C 0 1 C Nera Gig 112 7 500 F 112 500 F 0 2 F 20 2 F l 2 604 Q 100 200 C 100 200 C 01 0 1 C Nicer ronone 148 392 F 148 392 F 0 2 F 20 2 F 5 Actual value at 0
110. on Time 10 Hz 7300 ms 50 Hz 1540 ms 60 Hz 1300 ms 250 Hz 388 ms Update Time and Scanning Process Scanning Cycle on page 60 shows the scanning process for the RTD module assuming that the module is running normally and more than one channel is enabled The scanning cycle is shown for the situation where channels 0 and 1 are enabled and channels 2 and 3 are not used IMPORTANT The scanning process shown on is similar for any number of enabled channels Preliminary Operating Considerations 59 Channel scanning is sequential and always occurs starting with the lowest numbered enabled channel and proceeding to the next highest numbered channel for example channel 0 channel 1 channel 2 channel 3 channel 0 channel 1 Channel scan time is a function of the filter frequency Channel Scan Time Filter Frequency Channel Scan Time 10 Hz 305 ms 50 Hz 65 ms 60 Hz 55 ms 250 Hz 17 ms f The module scan time is obtained by summing the channel scan time for each enabled channel For example if 3 channels are enabled and the 50 Hz filter is selected the module scan time is 3 X 65 ms 195 ms The fastest module update time occurs when only one channel with a 250 Hz filter frequency is enabled Module Update Time 17 ms TIP With 3 channels enabled the module update time is 3 channels_ 17 ms channel 51 ms The slowest module update time occurs when four channels each using a 10 Hz filter freque
111. onfiguration error status 10 I Actual value at 0 C 32 F is 9 042 Q per SAMA standard RC21 4 1966 2 Actual value at 0 C 32 F is 100 Q per DIN standard 9 7 ow N Indicate this 100 Q Pt RTD 385 200 Q Pt RTD 385 500 Q Pt RTD 385 1000 Q Pt RTD 385 100 Q Pt RTD 3916 200 Q Pt RTD 3916 500 Q Pt RTD 3916 1000 Q Pt RTD 3916 gt O O 9 CO CO CO 10 Q Cu RTD 426 120 Q Ni RTD 618 120 Q Ni RTD 672 604 QNiFe RTD 518 150 O Resistance Input 1000 Q Resistance Input LD o 4 5 SS e Se ey ee ee OS OS RTA of ao of of oo colo 3000 Q Resistance Input Engineering units X 18 Engineering units X 10 Scaled for PID Proportional Counts Set to Zero Set to Upscale Set to Downscale Not used Degrees C Degrees of 5 10 Hz 50 Hz 60 Hz 250 Hz Channel Disabled Channel Enabled 20 mA 0 5 mA No error Short or opened detected No error Out of range detected No error Configuration error 8 values are in 0 1 degrees step or 0 1 step for all resistance input types except 150 Q For the 150 Q resistance input type the values are in 0 01 step V Values are in 1 degree step or 1 Q step for all resistance inp
112. ons that document new features and additional information about existing features and shows where to find this new information Change Moved terms and abbreviations from Preface to Glossary Page Preface Updated programming examples to show Throughout manual RSLogix 500 software Updated programming examples Chapter 6 Updated programming examples Chapter 8 Added Appendix D 1 0 configuration Appendix D page 131 Publication 1746 UMO008B EN P December 2006 4 Summary of Changes Notes Publication 1746 UMO008B EN P December 2006 Overview Quick Start Guide Install and Wire the Module Preliminary Operating Considerations Channel Configuration Data and Status Table of Contents Preface SS EIS Man dls o oed o daa se gt ange bt e Data quat yog Seok Adee 7 Who Should Use This Manual uy e e e REO t E Purpose of This Manual 2 aes v quete des e etd Me e et t etd 7 Common Techniques Used in This Manual 9 Chapter 1 DESCHPHON c rst pues ua Ef Ad i rd ds 11 System OVertview ee dw DAG kx acra E RV T S ESSA 18 Chapter 2 Required Tools and Equipment 000 00055 23 Probcedufes a d mg apto OUR Rak eR ER E E d 24 Chapter 3 ENGCODIFeCHVO rro wen eu kx e Koc Quo ES AMY Gg S Os 33 Electrostatic Damage n a aana aa 33 NR4 Power Requirements sca pgs aUe t de D s 34 Module Location in Chassis fe d dp ve So xp o a ra RATES 35 Module Installation and R
113. ord to determine if the data word for any channel is valid per your configuration in O e 0 through O e 3 For example whenever a channel is disabled O e x 11 0 its corresponding status word shows all zeros This condition tells you that input data contained in the data word for that channel is not valid and should be ignored Module Input Image Status Word e 4 CH 0 Status Word 15 0 e 5 CH 1 Status Word 15 0 e 6 CH 2 Status Word 15 0 l e 7 CH 3 Status Word 15 0 The channel status word can be analyzed bit by bit Each bit s status 0 or 1 tells you how the input data from the RTD sensor or resistance device connected to a specific channel is translated for your application The bit status also informs you of any error condition and can tell you what type error occurred A bit by bit examination of the status word is provided in the Channel 0 3 Status Word I e 4 through I e 7 Bit Definitions table Channel Configuration Data and Status 83 Channel 0 3 Status Word I e 4 through I e 7 Bit Definitions These bit settings 15 14 13 12 11 Bits Define 05 3 Input type status 4 5 Data format status 6 7 Broken input status 8 Temperature units status 9 10 Filter frequency status 11 Channel enable status 12 Excitation current status 13 Broken input error status 14 Out of range error status 15 C
114. ounts data format Each output word 0 3 configures a single channel Publication 1746 UM008B EN P December 2006 Preliminary Operating Considerations 53 EXAMPLE If you want to configure channel 2 on the RTD module located in slot 4 in the SLC chassis your address would be 0 4 2 Slot File Type Word O 4 2 Element Word Delimiter Delimiter Chapter 5 Channel Configuration Data and Status gives you detailed bit information about the content of the data word and the status word Input Image Data Words and Status Words The 8 word RTD module input image defined as the input from the RTD module to the CPU represents data words and status words Input words 0 3 data words hold the input data that represent the temperature value of the RTD input or ohmic value of the resistance inputs for channels 0 3 This data word is valid only when the channel is enabled and there are no channel errors Input words 4 7 status words contain the status of channels 0 3 respectively The status bits for a particular channel reflect the configuration settings that you have entered into the output image configuration word for that channel and provide information about the channel s operational state To receive valid status information the channel must be enabled and the channel must have processed any configuration changes that may have been made to the configuration word EXAMPLE To obtain the status of channel
115. ow the steps outlined in Chapter 2 Quick Start Guide Chapter 6 Ladder Programming Examples or Appendix D Channel Configuration Data and Status Enter your configuration data into your ladder program and copy it to the RTD module Publication 1746 UMO008B EN P December 2006 66 Channel Configuration Data and Status Channel Configuration Word 0 e 0 through 0 e 3 Bit Definitions Bit s Define Input type selection To select 100 QPt RTD 385 Make these hit settings in the Channel Configuration Word 200 Ca Pt RTD 385 500 Q Pt RTD 385 1000 Pt RTD 385 100 Q Pt RTD 3916 200 Pt RTD 3916 500 Pt RTD 3916 1000 Q Pt RTD 3916 10 Q Cu RTD 426 120 Q Ni RTD 618 120 Q Ni RTD 672 604 Q NiFe RTD 518 150 Q Resistance Input 500 Q Resistance Input 1000 Q Resistance Input 3000 Q Resistance Input Data format selection Engineering units X 19 Engineering units X 10 Scaled for PID proportional counts Broken input selection Set to Zero Set to Upscale Set to Downscale Invalid Temperature units selection Degrees C Degrees pe Filter frequency selection 10 Hz 50 Hz 60 Hz 250 Hz Channel enable Channel Disabled Channel Enabled Scaling selection Default Scaling Not U Not Used User set Scaling Ran
116. ow to address and configure the module for optimum operation as well as how to make changes once the module is in a run state 5 Channel Configuration Examines the channel configuration word and Data and Status the channel status word bit by bit and explains how the module uses configuration data and generates status during operation 6 Ladder Programming Gives an example of the ladder logic required Examples to define the channel for operation Also includes representative examples for unique programming requirements such as PID 7 Module Diagnostics and Explains how to interpret and correct Troubleshooting problems with your RTD module 8 Application Examples Examines both basic and supplementary applications and gives examples of the ladder programming necessary to achieve the desired result Appendix A Specifications Provides physical electrical environmental and functional specifications for the RTD module Appendix B RTD Standards Provides physical electrical environmental and functional specifications for the RTD and potentiometer Appendix C Configuration Worksheet Provides a worksheet to help you configure for RTD Resistance Module the module for operation Appendix D 1 0 Configuration Contains information on the 0 configuration procedure for RSLogix 500 Version 6 0 and later software Additional Resources Preface 9 The following documents contain additional information on Rockwell Au
117. r Programming Examples Earlier chapters explained how the configuration word defines the way a channel operates This chapter shows the programming required to enter the configuration word into the processor memory It also provides you with segments of ladder logic specific to unique situations that might apply to your programming requirements The example segments include e initial programming of the configuration word e dynamic programming of the configuration word e verifying channel configuration changes e interfacing the RTD module to a PID instruction e using proportional counts scaling example e monitoring channel status bits e invoking autocalibration The Application Setup diagram is used for clarification of the ensuing ladder logic examples and is not intended to represent an RTD application Chapter 8 shows a typical application for the RTD module Publication 1746 UMO008B EN P December 2006 88 Ladder Programming Examples Application Setup 1746 NR4 RTD Module 1746 0B8 DC Output Module Sourcing 1746 IB8 DC Input Module Sinking SLC Processor RTD 0 z RTD 1 x RTD 2 Pilot Light 0 2 1 Ste Ua Pilot Light 0 2 0 re _ Pilot Light 0 2 3 B Ch 0 Alarm Ch 1 Alarm Ch 2 Alarm Ch 3 Alarm md EI Pushbutton Switch 1 1 ae ey C hen FON T gt Pilot Light 0 2 2 F Display Panel
118. r reasons that include e open circuit excitation current is less than 5096 of the selected current e short circuit calculated lead wire compensated RTD resistance is less than 3 Q The open circuit error is active for all RTD and resistance inputs while the short circuit error is valid only for RTD inputs If a broken input is detected the module sends either zero upscale or downscale data to the channel data word for that channel depending on your channel configuration bits 6 and 7 A broken input error takes precedence over an out of range error states There will not be an out of range error when an open circuit or short circuit is detected This bit is cleared if the channel is disabled or if the channel operation is normal Publication 1746 UMO008B EN P December 2006 86 Channel Configuration Data and Status Publication 1746 UM008B EN P December 2006 Out of range Error Bit 14 This bit is set 1 whenever a configured channel detects an over range condition for the input channel data regardless of input type This bit is also set 1 whenever the module detects an under range condition when the input type is an RTD An out of range error is declared for either of the following conditions e over range The RTD temperature is greater than the maximum allowed default or user set temperature or the resistance input type is greater than the maximum allowed default or user set resistance When this o
119. rcuit RTD units only detection Internal diagnostics are performed at both levels of operation and any error conditions detected are immediately indicated by the module s LED indicators and status to the SLC processor Publication 1746 UMO008B EN P December 2006 100 Module Diagnostics and Troubleshooting Power Turn on Diagnostics Channel Diagnostics LED Indicators Publication 1746 UM008B EN P December 2006 A series of internal diagnostic self tests is performed when power is applied to the module The module status LED indicator and all channel status LED indicators remain off while power is applied If any diagnostic test fails the module enters the module error state If all tests pass the module status LED indicator is turned on and the channel status LED indicator is turned on for the respective enabled channel The module continuously scans all enabled channels and communicates with the SLC processor During power up the RTD module does not communicate with the processor When a channel is enabled bit 11 1 a diagnostic check is performed to see that the channel has been properly configured In addition the channel is tested for out of range open circuit and short circuit faults on every scan A failure of any channel diagnostic test causes the faulted channel status LED indicator to blink All channel faults are indicated in bits 13 15 of the channel s status word Channel faults are self clearing
120. rical specifications 117 EMC directive 33 enabling a channel 76 bit description in configuration word 76 engineering units inputs 67 equipment required for installation 23 error codes 102 errors 102 configuration error 102 detecting channel related errors 102 open circuit 103 over range error 103 under range error 103 detecting module related errors 104 conditions tested at power up 104 Publication 1746 UMO008B EN P December 2006 140 Index European Union Directives Compliance 33 examples how to address configuration word 52 how to address data word 53 how to address status word 53 how to use PID instruction 93 how to use proportional counts data 95 using alarms to indicate status 96 verifying channel configuration changes 92 excitation current 85 136 bit description in status word 85 F filter frequency 136 bit description in configuration word 76 bit description in status word 85 full scale error 136 full scale range 137 G gain drift 137 gain error 136 grounding cable shield 40 guidelines 40 H hardware overview 16 heat considerations 37 image table input image 22 output image 22 input channel multiplexing 19 input data scaling 137 input device type 67 bit description in status word 84 in configuration word 67 installation equipment required 23 heat and noise considerations 37 in fixed controller expansion chassis 37 in modular chassis 35 Publication 1746 UMO008B EN P December 2006 L
121. ror that is eliminated IMPORTANT To ensure temperature or resistance value accuracy the resistance difference of the cable lead wires must be equal to or less than 0 01 Q There are several ways to insure that the lead values match as closely as possible e Keep lead resistance as small as possible and less than 25 Q e Use quality cable that has a small tolerance impedance rating e Use a heavy gauge lead wire which has less resistance per foot Wire the Resistance Devices Potentiometers to the NR4 Module Potentiometer wiring requires the same type of cable as that for the RTD described in the previous subsection Potentiometers can be connected to the RTD module as a two wire interconnection or a three wire interconnection See Two wire Potentiometer Connections to Terminal Block on page 44 for 2 wire connection and Three wire Potentiometer Connections To Terminal Block on page 45 for 3 wire connection Publication 1746 UMO008B EN P December 2006 44 Install and Wire the Module Return Add jumper N Shield B e ChIORTD E e Chl 0 Sense c9 Chl 0 Return e Add d Shield e ChlORTD Nc Chl 0 Sense amp Chl 0 Return Two wire Potentiometer Connections to Terminal Block Cable Shield Potentiometer RTD Belden 9501 Shielded Cable Potent
122. rs should be set per your application Refer to the SLC 500 Instruction Set Reference Manual publication 1747 RM001 or the Analog Rung 2 2 1 0 User Manual publication 1746 UM005 for specific examples of the SCL instruction Rung 2 1 The RTD module can be set up to return data to the user program that is specific to the application Assume that you control the line speed of a conveyor using a 1000 Q potentiometer connected to channel 0 of the RTD module The line speed will vary between 3 ft m when the potentiometer is at 0 Q and 50 ft m when the potentiometer is at 1000 Q Follow these procedures to configure the RTD module to return a value between 3 50 in the data word for channel 0 1 Set bits 0 3 of configuration word 0 1110 to select the 1000 Q potentiometer input type 2 Set bits 4 and 5 of configuration word 0 11 to select proportional counts data format 3 Set bits 13 and 14 of configuration word 0 01 to select range 0 as the scaling range 4 Enter 3 as the low range into N10 4 5 Enter 50 as the high range into N10 5 First Pass Bit Initialize RTD module 8 1 COP LE COPY FILE 15 Source N10 0 Dest 0 3 0 Length 6 Channel 0 Status Set speed of conveyor motor I 3 4 SCL E SCALE s 11 Source I 3 0 Rate 10000 Offset Dest xL WE N10 0 0 Radix Binary X Symbol Columns 16 v Desc N10 a Properties Usage Help Pub
123. s The RTD module supplies a small current to each RTD unit connected to the module inputs Cup to 4 input channels The module provides on board scaling and converts RTD unit input to temperature C F or reports resistance input in ohms Each input channel is individually configurable for a specific input device Broken sensor detection open or short circuit is provided for each input channel In addition the module provides indication if the input signal is out of range For more detail on module functionality refer to System Overview page 18 Publication 1746 UMO008B EN P December 2006 12 Overview Simplified RTD Module Circuit m Constant Current Source so lc 0 5 or2 mA RTD Module RTD Sense mro GT Return RTD Sense Gy A D Digital Data uP Circuit Digital Data RTD Conversion Return RTD Sense RTD T Return RTD Sense mro GT Return eue dyoeg Publication 1746 UMO008B EN P December 2006 Overview 13 RTD Compatibility The following table lists the RTD types you can use with the RTD module and gives each type s associated temperature range resolution and repeatability specifications RTD Unit Temperature Ranges Resolution and Repeatability RTD Unit Type Temperature Range Temperature Range Resoluti
124. s however reference other chapters in this book where you can get more detailed information If you have any questions or are unfamiliar with the terms used or concepts presented in the procedural steps always read the referenced chapters and other recommended documentation before trying to apply the information This chapter e tells you what equipment you need e explains how to install and wire the module e shows you how to set up one channel for RTD or resistance input e examines the state of the LED indicators at normal startup e examines the channel status word Have the following tools and equipment ready e Medium blade screwdriver e Medium cross head screwdriver e RTD module 1746 NR4 e RTD sensor or resistance input e Appropriate cable Gf needed e Programming software Publication 1746 UMO008B EN P December 2006 24 Quick Start Guide Procedures Publication 1746 UM008B EN P December 2006 Follow these procedures to get your RTD module installed and ready to use Unpack the Module Unpack the module making sure that the contents include e RTD module catalog number 1746 NR4 e Installation instructions publication 1746 INO12 If the contents are incomplete contact your Allen Bradley representative for assistance Determine Power Requirements Review the requirements of your system to see that your chassis supports placement of the RTD module e The fixed 2 slot chassis supports
125. s 1 10 12 Enter the completed configuration words for each module into the summary worksheet on the following page 13 Following the steps outlined in Chapter 6 Ladder Programming Examples enter this configuration data into your ladder program and copy it to the RTD module Channel Configuration Worksheet 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit Number 0 Channel 0 0 Channel 1 0 Channel 2 0 Channel 3 A A A A A InputType Select Data Format Select Broken Input Select Temperature Units Select Filter Frequency Select Channel Enable Excitation Current Select Scaling Select Not Used Bit Definitions Bits Input Type Select 0000 100 OPL 385 0110 500QPL 3916 1100 180 O 0 3 0001 200 Pt 385 0111 1000 OPL 3916 1101 500 Q 0010 500 Pt 385 1000 10 acu 427 1110 1000 Q 0011 1000 2Pt 385 sag 129 nigral 1111 3000 Q 0100 100 rapt 3916 919 190 ONT 672 0101 200 QPL 3916 1011 604 QNi Fe 518 Bits 4 Data Format Select 00 engineering units x1 10 scaled for PID 0 16 383 and 5 01 engineering units x10 11 proportional counts 32 768 32 767 Bits 6 Broken Input Select 00 zero 01 upscale 10 downscale 11 invalid and 7 Bit8 Temperature Units 0 degrees Celsius degre
126. scale limit scaling range 1 If you make this setting be sure to enter low and high scale values into configuration words 6 and 7 11 not used configuration error Default Scaling The first case to consider is when default scaling is selected and the scaling select bits bits 13 and 14 are set to 00 module defined scaling Refer to Scaled for PID on page 68 and Proportional Counts Data Format on page 69 for considerations when using default values Channel Configuration Data and Status 79 User set Scaling Proportional Counts The second case to consider is User set Scaling using proportional counts when the scaling select bits 13 and 14 are set to 01 or 10 Here you can configure the module to scale the data word to something other than 32 768 to 32 767 However the maximum range remains 32 768 to 32 767 You define what the upper and lower limits are going to be by placing the range in the user set scaling words for range 0 words 4 and 5 or range 1 words 6 and 7 The module scales the input data to the upper and lower limit in an linear relationship The following example clarifies this feature In this example the RTD module channel that will be configured for user set scaling is channel 3 As shown in User set Scaling Using Proportional Counts Data Format on page 80 you have programmed the channel 3 configuration word for 1000 potentiometer bits 0 3 proportional counts data format bits 4 and 5 and
127. t test is performed on all enabled channels on each scan Whenever an open circuit or short circuit condition occurs the channel LED indicator blinks and bit 13 of the channel status word is set These are possible causes of an open or short circuit e The RTD or potentiometer may be broken A RTD or potentiometer wire may be loose or cut e The RTD or potentiometer may not have been installed on the configured channel e The RTD may be internally shorted e The RTD may be installed incorrectly If an open or short circuit is detected the channel data word reflects input data as defined by the broken input configuration bits 6 and 7 in the channel configuration word Out of range Detection Whenever the data received at the channel data word is out of the defined operating range an over range or under range error is indicated and bit 14 of the channel status word is set IMPORTANT There is no under range error for a direct resistance input default scaling For a review of the temperature range or resistance range limitations for your input device refer to the temperature ranges provided in the tables on page 72 73 or the user specified range in configuration words 4 7 if proportional counts is used Publication 1746 UMO008B EN P December 2006 104 Module Diagnostics and Troubleshooting Possible causes of an out of range condition include the following e The temperature is too hot or too cold for the RTD un
128. t to verify that a dynamic channel configuration change took effect in the RTD module This is particularly important if the channel being dynamically configured is used for control The Program to Verify Configuration Word Data Changes ladder diagram explains how to verify that channel configuration changes have taken effect EXAMPLE Execute a dynamic configuration change to channel 2 of the RTD module located in slot 3 of a 1746 chassis and set an internal data valid bit when the new configuration has taken effect Program to Verify Configuration Word Data Changes Rung 2 0 Set up all four channels S 1 COP E COPY FILE 15 Source N10 0 Dest 0 3 0 Length 4 Rung 2 1 Set channel 2 to display in C I 1 0 B3 n il MOVE E OSR Source N10 4 0 0 Dest 0 3 2 Rung 2 2 Set channel 2 back to display in F I 1 0 B3 MOV E OSR MOVE 0 1 Source N10 2 Dest 0 3 2 Rung 2 3 MVM MASKED MOVE Source I 3 6 Mask 9FFF Dest N7 0 XOR BITWISE EXCLUS OR Source A N7 0 Mask 0 3 2 Dest N7 1 Publication 1746 UMO008B EN P December 2006 Ladder Programming Examples 93 Program to Verify Configuration Word Data Changes Continued Checkthat the configuration written to channel 2 is Rung 2 4 being echoed back in channel 2 s status word Data valid EQU B3 EQUAL C Source A N7 1 3 Source B 0 Rung 2 5
129. the desired input filter frequency for the channel and enter the two digit binary code in bit field 9 and 10 Filter Frequency Selection of the channel configuration word A lower filter frequency increases the channel update time but also increases the noise rejection and channel resolution A higher filter frequency decreases the channel update time but also decreases the noise rejection and channel resolution Place a one in bit 11 channel Enable if the channel is used or place a zero in bit 11 if the channel is not used Place a zero in bit 12 for an excitation current of 2 0 mA or place a one in bit 12 for 0 5 mA Select the excitation current value based on RTD vendor recommendations and the Input Specifications table on page 118 If you have chosen proportional counts data format select whether you want the module defined default scaling selected for each channel or if you want to define the scaling range yourself Use bits 13 and 14 user set scaling for this setting If you choose to define the scaling range for proportional counts data format make sure to enter the lower and upper limits in words 4 and 5 defines range 0 or 6 and 7 defines range 1 Place a zero is in bit 15 because this bit is not used Build the channel configuration word using the configuration worksheet on page 128 for every channel on each RTD module repeating the procedures given in steps 1 11 Enter the Configuration Data Foll
130. the following e channel 0 e 604 Q Nickel Iron 518 e display temperature to tenths of a degree Celsius e zero data word in the event of an open or short circuit e 60 Hz input filter to provide 60 Hz line noise rejection e use 2 0 mA excitation current for RTD e select module defined scaling Configuration setup for bath RTD includes the following e channel 1 e 200 Q Platinum RTD 385 e display temperature to tenths of a degree Celsius e zero data word in the event of an open or short circuit e 60 Hz input filter to provide 60 Hz line noise rejection e use 2 0 mA excitation current for RTD e select module defined scaling Configuration setup for steam RTD includes the following e channel 2 e 1000 Q Platinum RTD 385 e display temperature to tenths of a degree Celsius e zero data word in the event of an open or short circuit e 60 Hz input filter to provide 60 Hz line noise rejection e use 0 5 mA excitation current for RTD e select module defined scaling Configuration setup for chilled H2O RTD the following e channel 3 e 200 Q Platinum RTD 385 e display temperature to tenths of a degree Celsius e zero data word in the event of an open or short circuit e 60 Hz input filter to provide 60 Hz line noise rejection e use 2 0 mA excitation current for RTD e select module defined scaling Application Examples 113 Channel Configuration Worksheet With Settings Established
131. the temperature coefficient of resistance which is defined as the resistance change per ohm per C JS Standard D100 Japanese Standard JIS C1604 1989 ATTENTION 6 Japanese Industrial Standard JIS C1604 1981 International Electrotechnical Commission Standard 751 1983 3 German Standard DIN 43760 1980 and DIN 43760 1987 5 Scientific Apparatus Makers Association Standard RC21 4 1966 8 Minco Type NA Nickel and Minco Type FA Nickel Iron 10 Actual value at 0 C 32 F is 100 W per DIN standard 9 Actual value at 0 C 32 F is 9 042 W per SAMA standard RC21 4 1966 We recommend you use RTDs that conform to the standards in the table above Failure to heed this caution may result in reduced accuracy of the RTD system Publication 1746 UMO008B EN P December 2006 124 RTD Standards Notes Publication 1746 UM008B EN P December 2006 Channel Configuration Appendix C Configuration Worksheet for RTD Resistance Module The following configuration procedure and worksheet are provided to help you configure each of the channels on your RTD module The channel configuration word consists of bit fields the settings of which determine how the channel will operate This procedure looks at each bit field separately and helps you configure a channel for operation Refer to the Channel Configuration Word O e 0 through O e 3 Bit Definitions table and the detailed configuration
132. tion Value 0 2 0 mA Set the excitation current to 2 0 mA 1 0 5mA Set the excitation current to 0 5 mA Publication 1746 UMO008B EN P December 2006 78 Channel Configuration Data and Status Publication 1746 UM008B EN P December 2006 Scaling Select Bits 13 14 If you selected proportional counts as the format for your input data you can enter a scaling range that ensures your data is scaled within a range appropriate for your use You can use words 4 and 5 to define one range and words 6 and 7 to define a second range The Bit Descriptions for Scaling Selection table gives the descriptions for bits 13 and 14 Bit Descriptions for Scaling Selection Binary Value Select If you want to 00 Use module Configure the module to scale the data word using the defined scaling default scale range 32 768 to 32 767 for scaled for PID and proportional counts 01 Use Define a range range 0 that your proportional counts data configuration will be scaled to Configuration word 4 contains the low words 4 and 5 for scale limit and configuration word 5 contains the high scale scaling range 0 limit If you make this setting be sure to enter low and high scale values into configuration words 4 and 5 10 Use Define a range range 1 that your proportional counts data configuration will be scaled to Configuration word 6 contains the low words 6 and 7 for scale limit and configuration 7 contains the high
133. to one module update time Reconfiguration Time Response to Slot Disabling The time it takes to change a channel configuration if the device type filter frequency or excitation current is different from the current setting The enable bit remains in a steady state of 1 Changing temperature resistance units or data format does not require reconfiguration time Requires up to one module update time plus one of the following e 250 Hz Filter 124 ms e 60 Hz Filter 504 ms e 50 Hz Filter 604 ms e 10 Hz Filter 3 004 ms By 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 Always understand the implications of disabling a RTD module in your application before using the slot disable feature A Publication 1746 UM008B EN P December 2006 62 Preliminary Operating Considerations Publication 1746 UMO008B EN P December 2006 Input Response When a RTD slot is disabled the RTD module continues to update its input image table However the SLC processor does not read inputs from a module that is disabled Therefore when the processor disables the RTD module slot the module inputs appearing in the processor input image remain in their last state and the module s updated image table is not read When the processor re enables the module slot the current state of the module inputs are read
134. tomation products For Read This Document Document Number An overview of the SLC 500 family of products SLC 500 Systems Selection Guide 1747 SG001 A description on how to install and use your modular SLC 500 SLC 500 Module Hardware Style User Manual 1747 UMO11 programmable controller A description on how to install and use your fixed SLC 500 Installation amp Operation Manual for Fixed 1747 UM009 programmable controller Hardware Style Programmable Controllers A reference manual that contains status file data instruction set SLC 500 Instruction Set Reference Manual 1747 RM001 and troubleshooting information A resource manual and user s guide containing information about SLC 500 4 Channel Analog I O Modules Users 1746 UM005 the analog modules used in your SLC 500 system Manual In depth information on grounding and wiring Allen Bradley Industrial Automation Wiring and Grounding 1770 IN041 programmable controllers Guidelines A description of important differences between solid state Application Considerations for Solid State SGI IN001 programmable controller products and hard wired Controls electromechanical devices A glossary of industrial automation terms and abbreviations Allen Bradley Industrial Automation Glossary AG ORO71 An article on wire sizes and types for grounding electrical National Electrical Code Published by the equipment National Fire Protection Association of Boston MA Co
135. tor Switch 3 Convert the individual RTD data words to BCD and send the data to the respective LED displays Program Listing The first two rungs of this program send the correct channel setup Application Examples 115 information to the RTD module based on the position of the degrees selector switch Program to Display Data on LED Displays Rung 2 0 If the degrees selector switch is turned to the Fahrenheit position set up all four channels to read in degrees Fahrenheit Degrees Selector Switch Configure RTD Fahrenheit Module Channels I 2 0 B3 COP E OSR COPY FILE 0 0 Source N10 0 Dest 0 1 0 Length 4 Rung 2 1 If the degrees selector switch is turned to the Celsius position set up all our channels to read in degrees Celsius Degrees Selector Switch Configure RTD Celsius Module Channels I 2 0 B3 POR 1 I OSRH COPY FILE 0 1 Source N10 4 Dest 0 1 0 Length 4 Rung 2 2 Write RTD Module Ambient Temperature to Display TOD TO BCD Source I 1 0 Dest 0 3 0 Rung 2 3 Write RTD Module Bath Temperature to Display TOD TO BCD Source Is 1 1 Dest 0 4 0 Publication 1746 UMO008B EN P December 2006 116 Application Examples Rung 2 4 Rung 2 5 Rung 2 6 Publication 1746 UM008B EN P December 2006 Write RTD Module Steam Temperature to Display TOD TO BCD Source I 1 2 Dest 0 5 0 Write RTD M
136. ucts You should understand programmable controllers 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 information on available training courses before using this product Purpose of This Manual This manual is a reference guide for the 1746 NR RTD Resistance Input Module The manual e gives you an overview of system operation e explains the procedures you need to install and wire the module at the application site e provides ladder programming examples e provides an application example of how this input module can be used to control a process Publication 1746 UMO008B EN P December 2006 8 Preface Publication 1746 UM008B EN P December 2006 Contents of this Manual Chapter Title Contents Preface Describes the purpose background and scope of this manual Also specifies the audience for whom this manual is intended and defines key terms and abbreviations used throughout this book 1 Overview Provides a hardware and system overview Explains and illustrates the theory behind the RTD input module 2 Quick Start Guide Provides a general procedural roadmap to help you get started using the RTD module 3 Install and Wire Provides installation procedures and wiring guidelines 4 Preliminary Operating Gives you the background information you Considerations need to understand h
137. ule to read the configuration word information you have selected While the enable bit is set modification of the configuration word may lengthen the module update time for one cycle If any change is made to the configuration word the change must be reflected in the status word before new data is valid Refer to Channel Status Checking on page 82 While the channel enable bit is cleared 0 the channel data word and status word values are cleared After the channel enable bit is set the channel data word and status word remain cleared until the RTD module sets the channel status bit bit 11 in the channel status word Bit Descriptions for Channel Enable Selection Binary Value Select Description 0 Channel disable Disable a channel Disabling a channel causes the channel data word and the channel status word to be cleared 1 Channel enable Enable a channel Excitation Current Selection Bit 12 The Bit Description for Excitation Current Selection table gives the description for bit 12 Use this bit to select the magnitude of the excitation current for each enabled channel Choose from either 2 0 mA or 0 5 mA This bit field is active for all inputs A lower current reduces the error due to RTD self heating but provides a lower signal to noise ratio Refer to RTD vendor for recommendations See page 119 for general information Bit Description for Excitation Current Selection Binary Select Descrip
138. uration Word O e 0 through O e 3 Bit Definitions table on page 66 Programming is discussed in chapter 6 Addressing is explained in chapter 4 Module Output Image Configuration Word 0 e 0 CH 0 Configuration Word 0 0 e 1 CH 1 Configuration Word 0 0 e 2 CH 2 Configuration Word 0 0 e 3 CH 3 Configuration Word 0 0 e 4 Defines user set lower scale limit for range 0 0 0 e 5 Defines user set upper scale limit for range 0 0 0 e 6 Defines userzset lower scale limit for range 1 0 0 e 7 Defines user set upper scale limit for range 1 0 Publication 1746 UMO008B EN P December 2006 64 Channel Configuration Data and Status Channel Configuration Procedure Publication 1746 UM008B EN P December 2006 Module default settings for configuration words 0 7 are all zeros Scaling defaults are explained on page 78 under the explanation for the Scaling Select Bits 13 14 The channel configuration word consists of bit fields the settings of which determine how the channel operates This procedure looks at each bit field separately and helps you configure a channel for operation Refer to the Channel Configuration Word O e 0 through O e 3 Bit Definitions table on page 66 and the bit field descriptions that follow for complete configuration information Page 128 contains a configuration worksheet that can assist your ch
139. ut type filter frequency or excitation current Isolation optical 500V dc for 1 min between inputs and chassis ground and between inputs and backplane Isolation between inputs None Publication 1746 UMO008B EN P December 2006 118 Specifications Physical Specifications LED indicators 5 green status indicators one for each of 4 channels and one for module status Module ID code 3513 Max termination wire size Two 2 5 mm 14 AWG wire per terminal Max cable impedance 25 max impedance for three wire RTD configuration see Cable Specifications Terminal block Removable Allen Bradley spare part Catalog Number 1746 RT25G Module Environmental Specifications Temperature operating 0 60 C 32 140 F Temperature storage 40 85 C 40 185 F Relative humidity 5 95 without condensation Hazardous environment classification Class Division 2 Hazardous Environment Agency certification e UL and CSA Class Division 2 Groups A when product or packaging is marked B C D certified e CE compliant for all applicable directives Input Specifications RTD types Platinum nickel nickel iron copper Temperature scale selectable C or F and 0 1 C or 0 1 F Resistance scale selectable 1 Qor 0 1 Qfor all resistance ranges or 0 1 Qor 0 01 Qfor 150 Q potentiometer Input step response See channel step response page 54 Input resolution an
140. ut types except 150 Q For the 150 Q resistance input type the values are in 0 1 step 5 This bit is cleared 0 when a resistance device such as a potentiometer is selected Publication 1746 UMO008B EN P December 2006 84 Channel Configuration Data and Status Publication 1746 UM008B EN P December 2006 IMPORTANT The status bits reflect the settings that were made in the configuration IMPORTANT Fay However two conditions must be true if the status reflected is to be accurate e The channel must be enabled e The channel must have processed any new configuration data Input Type Status Bits 0 3 The input type bit field indicates what type of input device you have configured for the channel This field reflects the input type selected in bits 0 3 of the channel configuration word when the channel is enabled If the channel is disabled these bits are cleared 0 Data Format Status Bits 4 and 5 The data format bit field indicates the data format you have defined for the channel This field reflects the data type selected in bits 4 and 5 of the channel configuration word when the channel is enabled If the channel is disabled these bits are cleared 0 Broken Input Status Bits 6 and 7 The broken input bit field indicates how you have defined the channel data to respond to an open circuit or short circuit condition This field reflects the broken input type selected in bits 6 and 7 of the channel conf
141. xamples 111 Supplementary Example 1746 NRA 1746 IB8 This example provides the application setup channel configuration and program setup Application Setup Four Channels C lt gt F Device Configuration for Displaying Many RTD Outputs shows how to display the temperature of several different RTD units at one annunciator panel A selector switch 1 2 0 allows the operator to choose between displaying data in C and F Each of the displays 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 Device Configuration for Displaying Many RTD Outputs 4 1746 0B16 A Ambient Temperature 604 Q Nickel lron 518 O q Ambient Bath Steam Chilled HO Chilled HO Pipe In 5C SF 200 Q Platinum RID 385 Chilled HO Pipe Out Selector Switch 1 2 0 Bath 1000 Q Platinum RID 385 200 Q Platinum RD 385 s lt Steam Pipe In LN Publication 1746 UMO008B EN P December 2006 112 A Application Examples Publication 1746 UMO008B EN P December 2006 Channel Configuration See completed worksheet in Channel Configuration Worksheet With Settings Established on page 113 Configuration setup for ambient RTD includes
142. y placing a one in bit 11 if the channel is to be enabled or a zero in bit 11 if the channel is to be disabled Bit 11 Channel 0 channel disable 1 2 channel enabled Enable 8 Select the excitation current for the inputs A zero in bit 12 provides an excitation current of 2 0 mA a 1 will provide 0 5 mA 0 excitation current 2 0 mA Bit 12 Excitation Current 1 excitation current 0 5 mA 9 If you have selected scaled for PID or proportional counts data formats you can choose module defined scaling this applies the scale associated with your data format selection in step 2 In addition use bits 13 and 14 if you want to define the scaling range yourself for proportional counts data format user set scaling If you choose to define the scaling range for proportional counts make sure to enter the lower and upper user set limits in words 4 and 5 defines range 0 or 6 and 7 defines range 1 Refer to Chapter 5 00 module defined scaling Bits 13 Select 01 configuration words 4 and 5 used for scaling range 0 and 14 Scaling 10 configuration words 6 and 7 used for scaling range 1 11 not used invalid setting 10 Make sure a zero is in bit 15 This bit is not used Publication 1746 UMO008B EN P December 2006 128 Configuration Worksheet for RTD Resistance Module 11 Build the channel configuration word for every channel that is being used on each RTD module repeating the procedures given in step
143. ypes This can happen if the RTD or its signal wires are shorted together for any reason The short circuit condition does not apply to resistance ranges since they start at 0 ohms which can be a short circuit condition Bit Descriptions for Broken Input Selection Binary Value Select Description 00 zero Force the channel data word to 0 during an open circuit condition or short circuit condition 01 upscale Force the channel data word value to its full scale during an open circuit or short circuit condition The full scale value is determined by the input type data format and scaling selected 10 downscale Force the channel data word value to its low scale value during an open circuit or short circuit condition The low scale value is determined by the input type data format and scaling selected 11 not used Publication 1746 UMO008B EN P December 2006 76 Channel Configuration Data and Status Publication 1746 UM008B EN P December 2006 Temperature Units Selection Bit 8 The Bit Descriptions for Temperature Units Selection table shows the description for bit 8 The temperature units bit lets you select temperature engineering units in C or F for RTD input types This bit field is only active for RTD input types It is ignored when the resistance input type is selected Bit Descriptions for Temperature Units Selection Binary Select If you want to Value 0 Degrees Celsius D

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