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1746-6.7, SLC 500™ RTD/Resistance Input Module, User Manual

Contents

1. 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 A i inputType Select Data Format Select Broken Input Select Temperature Units Select Filter Frequency Select Channel Enable e Excitation Current Select Scaling Select NotUsed Bit Definitions 0000 100Q Pt 385 011025000 Pt 3916 1100 21500 0001 200Q Pt 385 0111210000 Pt 3916 11012 5000 001025000 Pt 385 1000 2100 Cu 427 1110 10000 Sine Input Type Select 0011 1000 Pt 385 1001 120QNi 618 1111 3000Q 0100 100Q Pt 3916 1010 120Q Ni 672 0101 200Q Pt 3916 1011 604Q Ni Fe 518 00 engineering units X19 10 scaled for PID 0 to 16383 Bits 4and 5 Data Format Select 01 engineering units x10 11 proportional counts 32768 to 32767 Bits 6 and 7 Broken Input Select 00 zero 01 upscale 10 downscale 11 invalid Bit 8 Temperature Units Select 0 degrees Celsius 1 degrees Fahrenheit Bits 9 and 10 Filter Frequency Select 00 10Hz 01 50 Hz 10 60 Hz 11 250 Hz Bit 11 Channel Enable 0 channel disabled 1 channel enabled Bit 12 Excitation Current Select 0 22 0 mA 1 0 5 mA l 11 Notused 00 module defined 01 2 config words 4 amp 10 config words 6 amp PISIS Iae Scan SEC scaling default 5 for scaling 7 f
2. Table 5 S Channel 0 3 Status Word I e 4 through I e 7 Bit Definitions BI Defi These bit settings Indl Ne enne 15 14 13 12 11110 9 8 7 6 5 4 3 2 1 0 ndicate this 0 0 07 0 100Q PtRTD 385 0 0 0 1 20082 Pt RTD 385 010 1 0 500 2 Pt RTD 385 010 1 1 10009 Pt RTD 385 0 1 0 0 100Q PtRTD 3916 0 1 0 1 2002 PtRTD 3916 0 1 1 0 Soogptar 3916 0 1 1 1 m1009PtRTD 3916 Es TDUEORSSiaUS 1 of 0 o 0ocunm 290 1 0 0 1 1202NiRTD 618 1 0 1 0 120Q NiRTD 672 1 0 1 1 604 2 NiFe RTD 518 1 1 0 0 150Q Resistance Input 1 1 0 1 500Q Resistance Input 1 1 1 0 10002 Resistance Input 1 1 1 1 3000Q Resistance Input 0 0 Engineering units x 1 0 1 Engineering units x 10 4 5 Data format status 1 0 Scaled for P ID 1 1 Proportional Counts 0 0 Setto Zero 0 1 Set to Upscale 6 7 Broken input status 1 0 Set to Downscale 1 1 Notused Temperature units 0 Degrees C 8 status 1 Degrees F 0 0 10 Hz ar Filter frequency 0 1 50 Hz status 1 0 60 Hz 1 1 250 Hz Channel enable 0 Channel Disabled status 1 Channel Enabled 12 Excitation current 0 2 0 mA Status 1 0 5 mA B Broken input error 0 No error Status 1 Short or open detected 14 Out of range error 0 No error Status 1 Out of range detected 15 Configuration error No error Status 1 Configuration error Actual value at 0
3. Figure 3 1 Terminal Block Release Screws STO Terminal Block Release Screws amp Max Torque 0 6 Nm 5 3 in Ibs amp amp 2 2 Grasp the terminal block at the top and bottom and pull outward and down Chapter 3 Installation and Wiring Installing the Module 1 Align the circuit board of the RTD module with the card guides located at the top and bottom of the chassis as shown in the following figure Figure 3 2 Module Insertion Into the Chassis ANY WH Ws Qo WH WH WA x Top and Bottom WHF N Module Release s N TS Card 3 8 Guide 4 LL 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 Removing 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 3 5 Chapter 3 Installation and Wiring Terminal Wiring The RTD module contains an 18 position removable terminal block The terminal pin
4. COAG o The digits following the RTD type represent the temperature coefficient of resistance 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 The accuracy values assume that the module was calibrated within the specified temperature range of 0 C to 60 C 32 F to 140 F Actual value at 0 C is 9 04202 per SAMA standard RC21 4 1966 Actual value at 0 C is 100 2 per DIN standard To maximize the relatively small RTD signal only 2 mA excitation current is allowed Temperature drift specifications apply to a module that has not been calibrated When you are using 100Q or 200 2 platinum RTDs with 0 5 mA excitation current refer to the following important note about module accuracy Important Module accuracy using 100Q or 200Q platinum RTDs with 0 5 mA excitation current depends on the following criteria Module accuracy is 0 6 C after you apply power to the module or perform an autocalibration at 25 C ambient with module operating temperature at 25 C Module accuracy is 0 6 C AT x 0 034 C C after you apply power to the module or perform an autocalibration at 25 C ambient with the module operating temperature between 0 to 60 C where AT is the temperature difference between the actual operating temperature of the module and 25 C and 0 034 C
5. Bath NN LED Display DC Sinking Inputs BCD Format Channel Configuration Configure the RTD channel with the following setup e 200 Platinum RTD F in whole degrees zero data word in the event of an open or short circuit 10 Hz input filter 2 0 mA excitation current 8 1 Chapter 8 Application Examples Figure 8 2 Channel Configuration Worksheet With Settings Established for Channel 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit Number 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 Channel 0 0 Channel 1 0 Channel 2 0 Channel 3 A A A A L Input Type Select Data Format select Broken Input Select Temperature Units Select Filter Frequency Select Channel Enable Excitation Current Select Scaling Select NotUsed Bit Definitions 0000 100Q Pt 385 0110 5000 Pt 3916 1100 150Q Potentiometer 0001 200Q Pt 385 0111 1000Q Pt 3916 1101 500Q Potentiometer 0010 2500 Pt 385 1000 2100 Cu 426 1110 1000 P otentiometer Bits 0 3 Input Type Select 0011210000 Pt 385 1001 120QNi 618 1111230000 Potentiometer 0100 100Q Pt 3916 1010 120Q Ni 672 0101 200Q Pt 3916 1011 604Q Ni Fe 518 Bits4and5 Data Format Select A 2n m mu A n z a o to 32767 Bits 6 and 7 Broken I
6. on 200 Q Platinum RTD 385 TOT Chilled H20 Pipe Out Bath 1000 Q Platinum RTD 385 200 Q Platinum RTD 385 5 Selector Switch I 2 0 SSA Steam Pipe Out LM Steam Pipe In Mee Chapter 8 Application Examples Channel Configuration see completed worksheet in Figure 8 5 Configuration setup for ambient RTD channel 0 604 Q Nickel Iron 518 display temperature to tenths of a degree Celsius zero data word in the event of an open or short circuit 60 Hz input filter to provide 60 Hz line noise rejection use 2 0 mA excitation current for RTD select module defined scaling Configuration setup for bath RTD channel 1 200 Q Platinum RTD 385 display temperature to tenths of a degree Celsius zero data word in the event of an open or short circuit 60 Hz input filter to provide 60 Hz line noise rejection use 2 0 mA excitation current for RTD select module defined scaling Configuration setup for steam RTD channel 2 1000 Q Platinum RTD 385 display temperature to tenths of a degree Celsius zero data word in the event of an open or short circuit 60 Hz input filter to provide 60 Hz line noise rejection use 0 5 mA excitation current for RTD select module defined scaling Configuration setup for chilled HzO RTD channel 3 200 Q Platinum RTD 385 display temperature to tenths of a degree Celsius zero data word in the event of an open or short circuit 60 Hz i
7. USA 888 932 9183 CANADA 805 828 2505 2 Over 100 years cumulative experience 5 24 hour rush turnaround technical support service Established in 1993 The leading independent repairer of servo motors and drives in North America Visit us on the web Www servo repair com www servorepair ca www ferrocontrol com www sandvikrepair com www accuelectric com Scroll down to view your document For 24 7 repair services USA 1 888 932 9183 Canada 1 905 829 2505 Emergency After hours 1 416 624 0386 Servicing USA and Canada Ee Allen Bradley SLC 500 User RTD Resistance Input Module Manual Cat No 1746 NR4 Important User Information Because of the variety of uses for the products described in this publication those responsible for the application and use of this control equipment must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements including any applicable laws regulations codes and standards The illustrations charts sample programs and layout examples shown in this guide are intended solely for purposes of example Since there are many variables and requirements associated with any particular installation Allen Bradley does not assume responsibility or liability to include intellectual property liability for actual use based upon the examples shown
8. 11 13 0 Rung 2 2 Channel 1 Channel 1 Channel 1 Status Open or Short Alarm I 3 5 I 3 5 0 2 0 t E r 13 1 Rung 2 3 Channel 2 Channel 2 Channel 2 Status Open or Short Alarm I 3 6 I 3 6 0 2 0 tf E 11 13 2 Rung 2 4 Channel 3 Channel 3 Channel 3 Status Open or Short Alarm I 3 7 I3 0 2 0 t E 11 13 3 Rung 2 5 END Data Table 15 data 0 address 15 data 0 0000 1001 0001 0001 N10 3 0000 1001 0001 0001 0000 1001 0001 0001 0000 1001 0001 0001 Invoking Autocalibration gt Rung 2 0 Rung 2 1 Chapter 6 Ladder Programming Examples Autocalibration of a channel occurs whenever achannel first becomes enabled 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 Figure 6 10 you can command your module to perform an autocalibration cycle by disabling a channel waiting for the status bit to change state 1 to 0 and then re enabling that channel To maintain system accuracy we recommend that you periodically perform an autocalibration cycle for example whenever an event occurs that greatly changes the internal temperature of the control cabinet such as opening or closing its door ataconvenient time when the system is not making product such as during a shift change ATTENTION Several channel cycles are required to perform an autocalibration and it
9. 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 O or if the lower range value is greater than or equal to the upper range value a configuration error occurs Chapter 5 Channel Configuration Data and Status Figure 5 5 Limit Scale Words 0 e 4 Defines lower scale limit for range 0 Range 0 15 0 0 e 5 Defines upper scale limit for range 0 15 0 0 e 6 Defines lower scale limit for range 1 Range 1 15 BEP 722 0 0 e 7 Defines upper scale limit for range 1 15 i Unused Bit 15 Bit 15 is not used Ensure that this bit is always cleared 0 5 17 Chapter 5 Channel Configuration Data and Status Channel Data Word 5 18 The actual RTD or resistance input sensor values reside in I e 0 through L 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 Figure 5 6 to be valid The channel must be enabled channel status bit 1 e There must be no channel errors channel error bit 0 Figure 5 6 Module Input Image Data Word e 0
10. 492 oF 2e 02 F e104 F 0 1 C 0 1 C 0 1 C 10 2 C 120 NiRTD 672 o2 oF Co2ep a029F e104 F 10 1 C 1 10 1 C 10 1 C 10 2 C 6042 NiFe RTD 18 05 6 oer 02 F yor 150Q Resistance Input 0 02 Q 0 04 Q 0 04 Q 0 08 Q 500 2 Resistance Input 10 1 Q 10 2 Q 10 2 Q 10 4 Q 10002 Resistance Input 10 2 Q 10 3 Q 10 3 Q 10 5 Q 3000 2 Resistance Input 10 2 Q 0 3 Q 10 3 Q 10 5 Q The digits following the RTD type represent the temperature coefficient of resistance o 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 Q Actual value at 0 C is 9 04202 per SAMA standard RC21 4 1966 G Actual value at 0 C is 100Q per DIN standard 4 5 Chapter 4 Preliminary Operating Considerations 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
11. Not allowed E i am Not allowed E mr PH 0 2 C 0 2 C 0 008 C C 0 008 C C cas E 04 F 3 04 F E 0 014 F F 0 014 F F ae 0 2 C z0 2 C 0 008 C C 0 008 C C dos rs E 04 F 3 04 F E 0 014 F F 0 014 F F 0 3 C 0 3 C 0 010 C C 0 010 C C MST rare bu 3 05 F 3 05 F 0 018 F F 3 0 018 F F The digits following the RTD type represent the temperature coefficient of resistance o 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 Q The accuracy values assume that the module was calibrated within the specified temperature range of 0 C to 60 C 32 F to 140 F G Actual value at 0 C is 9 042 per SAMA standard RC21 4 1966 Actual value at 0 C is 100 2 per DIN standard To maximize the relatively small RTD signal only 2 mA excitation current is allowed Temperature drift specifications apply to a module that has not been calibrated When you are using 100Q or 200 2 platinum RTDs with 0 5 mA excitation current refer to the following important note about module accuracy Important Module accuracy using 10082 or 200 platinum RTDs with 0 5 mA excitation current depends on the following criteria Module accuracy is 0 6 C after you apply power to the module or perform an autocalibration
12. RTD Shield ciom ae E NE SE ien Chi2 Sense chio Sense PJ J Gr RID ens Return Return Chl2 RTD Chl 0 Return CO Sense Chl3 Belden 83503 or Belden 9533 Shielded Cable Chl2 Sense Return Chl 3 Shield Return 4 Wire RTD Interconnection Cable Shield Shield a Shield Chl 0 RTD _ _ gt _ Chl 0 Sense Got Chl 0 Retum JUD EN EPUM Belden 83503 or Belden 9533 Shielded Cable Leave One Sensor Wire dii Chapter 3 Installation and Wiring When using a 3 wire configuration the module compensates for resistance error due to lead wire length For example in a 3 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 error 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 0 012 There are several
13. but also decreases the channel update time Channel Enable Selection Bit 11 Table 5 P 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 When set 1 the channel enable bit is used by the module 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 5 19 While the channel enable bit 1s cleared 0 the channel data word and status word values are cleared After the channel enable bit 1s 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 5 13 Chapter 5 Channel Configuration Data and Status 5 14 Table 5 P Bit Descriptions for Channel Enable Selection Binary Value Select If you want to disable a channel Disabling a channel causes the channel data 1 cannel aisabie word and the channel status word to be cleared 1 channel enable enable a channel Excitation Current Selection Bit 12
14. 1480 to 3920 100 to 200 148 to 392 0 to 16383 32768 to 32767 Actual value at 0 C is 10092 per DIN standard Table 5 D Data Format for 1000 Q Platinum RTD 385 Data Format Excitation Current Engineering Units x 1 Engineering Units x 10 Proporti ESL portional Counts 0 1 C 0 1 F 10 C ie eee Default 0 5 mA 2000 to 8500 3280 to 15620 200 to 850 328 to 1562 0 to 16383 32768 to 32767 2 0 mA 2000 to 2400 3280 to 4640 200 to 240 328 to 464 0 to 16383 32768 to 32767 Table 5 E Data Format for 1000 Q Platinum RTD 3916 Data Format Excitation Current Engineering Units x 1 Engineering Units x 10 Proporti eae portional Counts 01 C 0 1 F 10 C LoF ree Default 0 5 mA 2000 to 6300 3280 to 11660 200 to 630 328 to 1166 0 to 16383 32768 to 32767 2 0 mA 2000 to 2300 3280 to 44600 200 to 230 328 to 446 0 to 16383 32768 to 32767 5 9 Chapter 5 Channel Configuration Data and Status 5 10 Table 5 F Data Format for 10Q Copper 426 RTD Data Format Excitation Current Engineering Units x 1 Engineering Units x 10 Proportional Counts 0 1 C 0 1F 10 C ioe Sealed for PID Default 0 5 mA not allowed Ber m 2 0 mA 1000 to 2600 1480 to 45000 100to 260 148 to 500 0 to 16383 32168 to 32767 Actual value at0 C is 9 04292 per SAMA standard RC21
15. 2 wire pot interconnection 3 10 3 11 3 wire pot interconnection 3 10 3 11 accuracy 1 5 A 5 ohmic values 1 5 A 5 repeatability 1 5 A 5 resolution 1 5 A 5 wiring diagram 3 10 3 11 wiring inputs 3 9 3 12 power requirements 3 2 power up sequence 1 8 programming 6 1 alarms 6 10 6 11 application examples 8 1 configuration settings 6 2 initial setting 6 2 making changes 6 4 PID instruction 6 7 proportional counts data format 6 9 verifying channel configuration changes proportional counts data format 6 9 application example 6 9 programming 6 9 proportional counts input 5 5 publications related P 3 Q quick start guide 2 1 procedure 2 2 R reconfiguration time 4 11 remote configuration P 5 removable terminal block 1 6 removing the module 3 5 removing the terminal block 3 4 resistance device types 1 5 A 5 accuracy 1 5 ohmic values 1 5 A 5 potentiometers 1 5 A 5 temperature drift 1 5 resolution P 5 4 5 routing of wires 3 7 RTD accuracy 1 4 compatibility 1 3 definition P 6 excitation current 1 1 definition and values P 4 standards B 1 14 Index RTD resistance Input Module User Manual temperature drift 1 4 temperature ranges 1 3 A 3 terminal wiring 2 wire RTD interconnection 3 8 3 wire RTD interconnection 3 8 4 wire RTD interconnection 3 8 theory 1 1 types 1 3 A 2 S sampling time P 6 scaled for P ID 5 5 scaling 5 16 scaling input
16. 6750 Table 5 C Chapter 5 Channel Configuration Data and Status Table 5 C 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 RTDs vary with excitation current for example 1000 Platinum 385 Table 5 D 1000 Platinum 3916 Table 5 E and 10 Copper 426 Table 5 F Data Formats for RTD Temperature Ranges for 0 5 and 2 0 mA Excitation Current Data Format RTD Input Type Units x m RM Scaled for PID dier al 100 Q Platinum 385 2000 to 8500 3280 to 15620 200 to 4850 328 to 41562 0 to 16383 32168 to 32767 200 Q Platinum 385 2000 to 8500 3280 to 15620 200 to 4850 328 to 41562 0 to 16383 32768 to 32767 500 Q Platinum 385 2000 to 8500 3280 to 15620 200 to 4850 328 to 41562 0 to 16383 32168 to 32767 100 Platinum 3916 2000 to 6300 3280 to 11660 200 to 630 328 to 1166 0 to 16383 32168 to 32767 200 Q Platinum 3916 2000 to 6300 3280 to 11660 200 to 4630 328 to 41166 0 to 16383 32768 to 32767 500 Q Platinum 3916 2000 to 6300 3280 to 11660 200 to 630 328 to 1166 0 to 16383 32168 to 32767 120 Q Nickel 672 800 to 42600 1120 to 45000 80 to 4260 112 to 4500 0 to 16383 32768 to 32767 120 Q Nickel 618 1000 to 2600 1480 to 5000 100 to 260 148 to 500 0 to 16383 32768 to 32767 604 Q Nickel Iron 518 1000 to 2000
17. C is the temperature drift shown in the table above for 100 2 or 200 2 platinum RTDs Module accuracy is 4 1 0 C after you apply power to the module or perform an autocalibration at 60 C ambient with module operating temperature at 60 C Chapter 1 Overview Resistance Device Compatibility Table 1 C lists the resistance input types you can use with the RTD module and gives each type s associated specifications Table 1 C Resistance Input Specifications Resistance Range Resistance Range f a Input Type 0 5 mA Excitation 2 0 mA Excitation Accuracy Temperature Drift Resolution Repeatability 1500 0 2to0150 Q 0 2to 150 0 01Q 0 04Q 500Q Qt za pa 0 014 Q C aie 0 500 Q 0 Q to 500 Q 0 59 0 025 OJ F 0 1Q 0 2Q Resistance 000 0 to 10002 0 to 1000 Q rie c am D 010 0 29 30002 0Q2to3000Q 0 Qto 1900 Q 15Q a os oe 0 12 0 20 The accuracy for 150Q is dependant on the excitation current 0 20 at 0 5 mA 0 15 at 2 0 mA Q The temperature drift for 150 is dependant on the excitation current 0 0060 C at0 5 mA 0 0040 at 2 0 mA G The accuracy values assume that the module was calibrated within the specified temperature range of 0 C to 60 C 32 F to 140 F Hardware Overview The RTD module fits into a single slot of an SLC 500 modular system except the processor slot 0 e fixed system expansion ch
18. Chapter 8 Application Examples Rung 2 4 Write RTD Module Steam Temperature to Display TOD TO BCD Source I 1 2 Dest 0 5 0 Rung 2 5 Write RTD Module Chilled Temperature to Display TOD TO BCD Source I 1 3 Dest 0 6 0 Rung 2 6 END Data Table address 15 data 0 address 15 data 0 N10 0 0000 1101 0000 1011 N10 5 0000 1100 0000 0001 N10 1 0000 1101 0000 0001 N10 6 0001 1100 0000 0011 N10 2 0001 1101 0000 0011 N10 7 0000 1100 0000 0001 N10 3 0000 1101 0000 0001 N10 4 0000 1100 0000 1011 8 9 Electrical Specifications Physical Specifications Specifications Appendix This appendix lists the specifications for the 1746 NR4 RTD Input Module Backplane Current Consumption 50 mA at 5V dc 50 mA at 24V dc Backplane Power Consumption 1 5W maximum 0 3 W at5V dc 1 2 W at 24V dc External Power Supply Requirements None Number of Channels 4 backplane isolated 1 0 Chassis Location Any I O 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 gt 150 dB at50 Hz 10 Hz and 50 Hz filter frequencies 150 dB at 60 Hz 10 Hz and 60 Hz filter frequencies Normal Mode Rejection between 4 input and input Greater than 100 dB at 50 Hz 10 Hz 50 Hz filter fr
19. Table 5 Q 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 A 2 for general information Table 5 Q Bit Description for Excitation Current Selection Binary Value Select Description 0 2 0 mA setthe excitation current to 2 0 mA 1 0 5 mA setthe excitation current to 0 5 mA 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 Table 5 R gives the descriptions for bits 13 and 14 Chapter 5 Channel Configuration Data and Status Table 5 R Bit Descriptions for Scaling Selection Binary Value Select If you want to configure the module to scale the data word using the default scale range 32768 to 32767 for scaled for PID and proportional counts Default scaling is explained on page 5 15 define a range range 0 that your proportional counts data will be scaled to Configuration word 4 contains the low scale limit and configuration word 5 contains the high scale limit If you m
20. out is shown in Figure 3 3 ATTENTION 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 Figure 3 3 Terminal Block Terminal Block Spare Part Catalog Number 1746 RT25G Release Screw d Max Torque 0 6 Nm 5 3 in Ibs Shield E x Ae Channel ORTD O GOn Channel 1 RTD Channel 0 Sense 4 X Ora Channel 1 Sense Channel 0 Return NN GO gt Channel 1 Return Shield E n Channel 2 RTD Channel 2 Sense amp x e Channel 3 Sense Channel 2 Return Oraa Channel 3 Return Shield Or 7 Shield Release Screw lo Max Torque 0 6 Nm 5 3 in Ibs 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 Configuration Recommended Cable 2 wire Belden 9501 or equivalent aul 30 48 m 100 ft Belden 9533 or equivalent 3 wire greater than 30 48
21. 2 Rung 2 2 Setchannel 2 back to display in F I 1 0 B3 MUN 1 1osR rae 0 1 Source N10 2 Dest 0 3 2 Rung 2 3 END Data Table address 15 data 0 address 15 data 0 N10 0 0000 1001 0001 0001 N10 3 0000 1001 0001 0001 N10 1 0000 1001 0001 0001 N10 4 0000 1000 0001 0001 N10 2 0000 1001 0001 0001 6 4 Chapter 6 Ladder Programming Examples Verifying Channel When executing a dynamic channel configuration change there will always Configuration Changes be 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 important to verify that a dynamic channel configuration change took effect in the RTD module particularly if the channel being dynamically configured is used for control Figure 6 6 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 Figure 6 6 Program To Verify Configuration Word Data Changes Rung 2 0 Set up all four channels 9 1 Cop lt COPY FILE 15 Source N10 0 Dest 0 3 0 Length 4 Rung 2 1 Set channel 2 to display in C MOV I 1 0 B3 MOVE E OSR Source N10 4 0 0 Dest 0 3 2 Rung 2
22. 2 Set channel 2 back to display in F I 1 0 B3 MOV f 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 6 5 Chapter 6 Ladder Programming Examples Rung 2 4 Rung 2 5 address N10 0 N10 1 N10 2 6 6 Check that the configuration written to channel 2 is being echoed back in channel 2 s status word Data valid EQU B3 EQUAL Source A N7 1 3 Source B 0 END Data Table 15 data 0 address 15 data 0 0000 1001 0001 0001 N10 3 0000 1001 0001 0001 0000 1001 0001 0001 N10 4 0000 1000 0001 0001 0000 1001 0001 0001 Chapter 6 Ladder Programming Examples Interfacing to the PID The RTD module was designed to interface directly to the SLC 5 02 SLC Instruction 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 To program this application proceed as follows 1 Select 700 Q Platinum RTD 0 003916 as the input type by setting bit 0 0 bit 1 0 bit 2 1 and bit 3 O 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 ATTENTION When using the module s scaled for PID data format with the SLC PID function ensure that the PID instruction parameters Maximum Scale
23. 518 150Q Resistance Input 500 2 Resistance Input 1000 2 Resistance Input 3000 Resistance Input Not used m rn im imn jo ijo o o mnrn mnm5 n5 n o oo oI tn RP RTO OP Ry RP oO Of RP rR Ol Of RP ry o oj 4 5 Data format selection Engineering units x 1 Engineering units x 10 Scaled for PID proportional counts lr 9 o ej oj ej o 6 7 Broken input selection Set to Zero Set to Upscale Set to Downscale Invalid el i o Rl oje o 8 Temperature units selection Degrees C Not used Filter frequency selection 10 Hz Degrees F 50 Hz 60 Hz 250 Hz e e o o e o e 11 Channel enable Channel Disabled Channel Enabled 12 Excitation current selection 2 0 mA 0 5 mA 13 14 Scaling selection Default Scaling User set Scaling Range 0 User set Scaling Range 1 Invalid ejej o o ej oje o j 5 Unused Unused Actual value at 0 C is 9 04202 per SAMA standard RC21 4 1966 Actual value at 0 C is 100 per DIN standard oec Ensure unused bit 15 is always set to zero 5 4 type the values are in 0 102 step Values are in 0 1 degree step or 0 192 step for all resistance input types except 1509 For the 150 2 resistance input type the values are in
24. 7 3 Chapter 7 Module Diagnostics and Troubleshooting 7 4 Channel Status LEDs Green The channel LED is used to indicate channel status and related error information contained in the channel status word This includes conditions such as normal operation channel related configuration errors broken input circuit errors such as open or short circuit RTDs only 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 blinks and bit 15 of the channel status word is set Configuration errors occur for the following invalid combinations Input type is a 10 Q Copper RTD and the excitation current is set for 0 5 mA which is not allowed 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 Scaling select bits 13 and 14 are setto 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 Open and Short Circuit Detection An open or short circuit test is performed on all enabled channels on each scan Whenever an open circuit or short circuit condition occurs see possible causes liste
25. 8 Application Examples your programming software s user manual Figure 2 7 Input Image Detail SLC 500 Controller P d Data Files Em Input Image 8 words Output Image Address Address 1 0 1 0 Word 0 Channel Data Word ol ol ol olol ol ol olol olol o olol odo 1 1 Wordl ChannellData Word Bit15 Variable RTD resistance Input Data BitQ 1 2 Word2 Channel2 Data Word 1 3 Word3 Channel3 Data Word Channel 0 Status Word Channel 1 Status Word A Channel 2 Status Word 1 7 Word7 Channel3 Status Word 2 9 Chapter 2 Quick Start LEE Procedure Test Your RTD Program Reference Apply power Download your program to the SLC and put the controller into Run mode In this exam ped ple during a normal start up the module status LED Figure 2 8 and channel 0 status LED turn on Diagnostics and Troubleshooting Figure 2 8 LED Status INPUT 0 2 Ede 3 Channel LEDs MODULE STATUS lt Module Status LED RTD resistance 2 10 Chapter 2 Quick Start Procedure Program Functional Check Optional Reference Optional Monitor the status of input channel 0 to determine its configuration setting and operational Chapter 5 status Figure 2 9 This is useful for troubleshooting when the blinking channel LED indicates that an ae i
26. Format Status Bits 4 and 5 4iicesss ei ker e m Broken Input Status Bits 6 and 7 u s sese ed hr aia Temperature Units Status BIEB ci ccc cca ee ems Channel Filter Frequency Bits 9 and 10 0 ee eee eee Channel Enable Status Bit11 1 cece Excitation Current Bit 12 ipee sesetwrkreeiekea eaves eu es Broken Input Error BIL13 soos ux RR Xara RR TRA Rx nra Out Of Range Eror Bit1d ssssses nnn Configuration Error Bit 15 1 5 oss ms Rn wees Chapter 34 Device Configuration siasa eae ke yh a RR RE AR IER E ew ca Initial Programming uua ese rk RR EAR RAI ERROR RC RO eee PIOLGBUUS epinio a dace fatu Ee dr au Macon up edat a ddr Dynamic PODER v4 cac 3e ot EUER EROR ieee cat XX dot ratio aso RO CC CE Verifying Channel Configuration Changes Interfacing to the PID Instruction i2 ie udkae cce Inh rhe Roh Using the Proportional Counts Data Format with the User setScaling Monitoring Channel Status Bits 0 eee eee nnn Invoking Autocalibration isses mnn Chapter 35 Module Operation vs Channel Operation 2 0 cece eee eee Power Up Diagnostics c2bscbbee beGevedemetiadetecawe uada Channel Diagnostics iicccticviawtidesaowraesdewstwbaavaa eens LED IngiCalolS iis chee ka x eee evan AE ER eter Veen aria dead EMOPQOUGS prapona dn tagai aae kiai uaa d vi dM RAO A A Channel Status LEDs Green aaa tien ir RR Invalid Channel Configuration 4 ace aden Re ha eer Open and Short Circui
27. Frequency Response Scanning Process and Channel Timing Chapter 4 Preliminary Operating Considerations 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 as shown in the following table Table 4 C Channel Calibration Time Filter Frequency Channel Calibration Time 10 Hz 7300 ms 50 Hz 1540 ms 60 Hz 1300 ms 250 Hz 388 ms Update Time and Scanning Process Figure 4 6 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 of Figure 4 6 is similar for any number of enabled channels Channel scanning is sequential and always occurs starting with the lowest numbered enabled channel and
28. January 1997 To help you find new information and updated information in this release of the manual we have included change bars as shown to the right of this paragraph New Information The table below lists sections that document new features and additional information about existing features and shows where to find this new information For This New Information See Calibration page 3 13 Single point calibration page 3 14 Overview Quick Start Guide Installation and Wiring Table of Contents RTD Resistance Input Module User Manual Preface Who Should Use this Manual 0 ccc cece n aa Purpose Of this MANU s s5 30a iew anda gee eke tad cRexaur euchrw a wes Contents of this Manual ccc ccc eet eens Related Documentation ccc cece cece men Terms and Abbreviations oo cece cece eee eee eee teres Common Techniques Used in this Manual essere Allen Bradley Support 0 0 cece cece ees Local Product SUPPONE tiuetivetund sen id etter tout re ear Technical Product Assistance lt i0sccudcs0s0 rr dew be ok dowd Your Questions or Comments on this Manual 00e0ee Chapter 29 DISSETIDEOEI raped apti d 18 ethnic Pate track 3d bs Bebb a a dinde oU Nice di RTD COMPAIDINY PDT Resistance Device Compatibility cc eee eee eee Hardware Overview cious ars dh d dee ease a rur ead e d be ed ow General Diagnostic Features 2 0 0 eee ees System Overview mmn System Oper
29. Select 00 zero 01 upscale 10 downscale 11 Invalid Bit 8 Temperature Units Select 0 degrees Celsius 1 degrees Fahrenheit Bits 9 and 10 Filter Frequency Select 00 2 10Hz 01 250 Hz 10 260 Hz 11 250 Hz Bit 11 Channel Enable 0 channel disabled 1 channel enabled Bit 12 Excitation Current Select 0 2 0mA 120 5 mA l 11 Notused 00 module defined 01 config words 4 amp 10 config words 6 amp Bits 13and14 Scaling Select scaling default 5 for scaling 1 for scaling ly Bits 15 Not Used 0 always make this setting Actual value at 0 C is 9 042 per SAMA standard RC21 4 1966 Q Actual value at 0 C is 100 2 per DIN standard Values are in 0 1 step or 0 12 step for all resistance input types except 1509 For the 150 2 resistance input type the values are in 0 01 2 step Values are in 1 step or 1 Q2 step for all resistance input types except 150 For the 150 resistance input type the values are in 0 1O step 8 6 Chapter 8 Application Examples Program Setup and Operation Summary 1 Set up two configuration words in memory for each channel one for C and the other for F Table 8 A shows the configuration word allocation summary Table 8 A Configuration Word Allocation Chatel Configuration Word Allocation oF 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 appropri
30. Status LED Green The module status LED is used to indicate module related diagnostic or operating errors These non recoverable errors may be detected at power up 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 Allen Bradley for assistance Chapter 7 Module Diagnostics and Troubleshooting Figure 7 3 Troubleshooting Flowchart Check LEDs on module Module Status LED is off Y Module fault condition Y Check to see that module is seated properly in chassis Cycle power Is problem corrected Contact your local distributor or Allen Bradley 7 6 Module Channel Channel Channel Status LED is on Status LED s Status LED is Status LED is blinking off on Normal module Channel is Channel is enabled operation Fault not enabled and working condition properly End Enable channel if Check channel desired by setting status word channel config bits 13 15
31. Turn Off and Reconfiguration Times 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 Chapter 4 Preliminary Operating Considerations 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 milliseconds e 60 Hz Filter 1300 milliseconds e 50 Hz Filter 1540 milliseconds e 10 Hz Filter 7300 milliseconds Turn Off Time The time ittakes to resetthe 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 to one module update time Reconfiguration Time 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 z 124 milliseconds e 60HzFilter 504 milliseconds e 50 Hz Filter 604 milliseconds e 10 Hz Filter 3 004 milliseconds Response to Slot Disabling By writin
32. at 25 C ambient with module operating temperature at 25 C Module accuracy is 0 6 C AT x 0 034 C C after you apply power to the module or perform an autocalibration at 25 C ambient with the module operating temperature between 0 to 60 C where AT is the temperature difference between the actual operating temperature of the module and 25 C and 0 034 C C is the temperature drift shown in the table above for 100 2 or 200 2 platinum RTDs Module accuracy is 1 0 C after you apply power to the module or perform an autocalibration at 60 C ambient with module operating temperature at 60 C A 4 Resistance Device Compatibility Resistance Input Specifications Appendix A Specifications Resistance Range Resistance Range m Input Type 0 5 mA Excitation 2 0 mA Excitation Accuracy Temperature Drift Resolution Repeatability 150Q 0 Q2 to 150Q 0 Q to 150 Q 0 01Q 0 04Q 500Q Qt dA a a 0 014 Q C Ai 0 500 Q 0 Q to 500 Q 0 5Q 0 025 OJ F 0 1Q 0 2Q Resistance 0o 0 to 10002 0 to 1000 Q rie c ees D 010 0 29 30002 0Q2to3000Q 0 Qto 1900 Q 150 rae mum 0109 3 020 The accuracy for 150Q is dependant on the excitation current 0 2Q at0 5 mA 0 150 at 2 0 mA Q The temperature drift for 150 is dependant on the excitation current 0 0060 C at0 5 mA 0 004 at 2 0 mA The accuracy values ass
33. data P 5 scanning process scanning cycle 4 9 update time 4 9 self locking tabs 1 6 shield connections 3 7 single point calibration 3 14 slot disabling 4 11 specifications A 1 cable A 5 electrical A 1 environmental A 2 input A 2 module accuracy A 4 physical A 1 standards for RTDs B 1 start up instructions 2 1 status word P 6 5 19 See also input image step response P 6 4 4 system operation 1 8 T temperature units 5 12 bit description in configuration word 5 12 bit description in status word 5 21 terminal pinout diagram 3 6 terminal wiring 3 6 terms P 4 tools required for installation 2 1 torque 3 7 terminal block screws 3 7 troubleshooting 7 1 contacting Allen Bradley P 7 flowchart 7 6 LED examination 7 2 turn off time 4 11 turn on time 4 11 U under range error 5 22 fault bit 5 22 update time P 6 channel update time 4 9 effects of filter time setting 4 3 module update time 4 10 V Verification of dynamic configuration change 6 5 Ww wiring 3 1 routing of wires 3 7 terminal wiring 3 6 shield connections 3 7 worksheets C 1 9 Rockwell Automation Allen Bradley a Rockwell Automation Business has been helping its customers improve productivity and quality for more than 90 years We design manufacture and support a broad Allen Bradley range of automation products worldwide They include logic processors power and motion c
34. 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 7 of the channel configuration word Bits 6 and 7 Select Broken Input 00 2 zero 01 upscale 10 downscale 11 invalid State 4 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 Bit 8 Select Temperature Units 0 degrees Celsius 1 degrees Fahrenheit 5 Determine the desired input filter frequency for the channel and enter the 2 digit binary code in bit field 9 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 and 10 Select Filter Frequency 00 2 10 Hz 01 250 Hz 10 260 Hz 11 250 Hz 6 If the channel will be used in your system it must be enabled Place a one in bit 11 if the channel is to be enabled Place a zero in bit 11 if the channel is to be disabled Bit 11 Channel Enable 0 2 channel disabled 1 2 channel enabled 7 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 Bit 12 Excitat
35. example all the bits of N10 0 will be zero except for the channel enable N10 0 11 Chapter 8 3 Program an instruction in your ladder logic to copy the contents of N 10 0 to output word Application 0 1 0 Figure 2 6 Examples Figure 2 6 Initial Configuration Word Setting Example of Data Table for Integer File N10 address 15 data 0 address 15 data 0 N10 0 0000 1000 0000 0000 iU i COP On power up the first pass bit E COPY FILE 5 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 channel 0 and to present the analog data to the SLC processor 2 8 Chapter 2 Quick Start E Procedure Write Remaining Ladder Logic Reference Chapter 5 As shown in Figure 2 7 the Channel Data Word contains the information that represents the Channel temperature value or resistance value of the input channel Write the remainder of the ladder logic Configuration program that specifies how your RTD resistance input data will be processed for your application In Data and Status this procedure the addressing reflects the location of the module as slot 1 Complete information about how to do ladder programming using the APS software can be found in the APS User Manual P ublication 9399 AP SUM Chapter 6 Ladder Programming Examples Chapter
36. ia fb o 9 e a jet Table 1 D Hardware Features 1 Channel Status LED Display operating and fault status of Indicators green channels 0 1 2 and 3 2 Module Status LED green Displays module operating and fault status Provides physical connection to input devices Part 3 Removable Terminal Block 1746 RT25G 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 during power up or during normal channel operation These power up and channel diagnostics are explained in chapter 7 Module Diagnostics and Troubleshooting System Overview Chapter 1 Overview 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 as shown in Figure 1 3 Figure 1 3 RTD Configuration RTD Modules SLC Processor Each individual channel on the RTD module can receive input signals from 2 3 or 4 wire RTD sensors or from resistance
37. indicates whether the documents are Allen Bradley Publication Index SD499 available on CD ROM or in multi languages A glossary of industrial automation terms and abbreviations Allen Bradley Industrial Automation Glossary AG 7 1 Published by the National Fire An article on wire sizes and types for grounding electrical equipment National Electrical Code Protection Association of Boston MA P 3 Preface Terms and Abbreviations P 4 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 magnitude 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 expre
38. 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 configuration 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 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 5 21 Chapter 5 Channel Configuration Data and Status 5 22 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 Excita
39. is important to remember that during autocalibration the module is not converting input data Example Command the RTD module to perform an autocalibration of channel 0 The RTD module is in slot 3 Figure 6 10 Programming to Invoke Autocalibration Condition for Channel 0 Enable Autocalibration I 1 B3 0 3 0 I E OSR U 1 0 11 Channel 0 Flag B3 L 1 Channel 0 Status Channel 0 Flag Channel 0 Enable I 3 4 B3 0 3 0 1 t rf L 11 1 11 Channel 0 Flag B3 U 1 6 11 Chapter 6 Ladder Programming Examples Important The RTD module responds to processor commands much more frequently than it updates its own LEDs 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 ever changing state 6 12 Module Operation vs Channel Operation Power Up Diagnostics Channel Diagnostics Chapter Module Diagnostics and Troubleshooting This chapter describes troubleshooting using the channel status LEDs as well as the module status LED A troubleshooting flowchart is shown in Figure 7 3 It 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 module operation vs channel operation power up diagnostics channel diagnostics LED indicators troubleshooting flowchart replacement parts contacting Allen Bradley Th
40. m 100 ft or high humidity Belden 83503 or equivalent conditions For a 3 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 A 5 Chapter 3 Installation and Wiring As shown in Figure 3 4 three configurations of RTDs can be connected to the RTD module namely 2 wire RTD which is composed of 2 RTD lead wires RTD and Return 3 wire RTD which is composed of a Sense and 2 RTD lead wires RTD and Return 4 wire RTD which is composed of 2 Sense and 2 RTD lead wires RTD and Return The second sense wire of a 4 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 We recommend that you do not use 2 wire RTDs if long cable runs are required as it will reduce the accuracy of the system However if a 2 wire configuration is required reduce the effect of the lead wire resistance by using a lower gauge wire for the cable for example use AWG 16 instead of AWG 24 Also use cable that has a lower resistance per foot of wire The module s terminal block accepts two AWG 14 gauge wires To limit overall cable impedance keep input cables as short as possible Locate your I O chassis as near the RTD sensors as your application will permit Ground the shield drain w
41. mA Excitation 2 0 mA Excitation i 410 C 0 5 C E 0 034 C C E 0 014 CFC 2 0 F 0 9 F 0 061 F F 0 025 F F 2009 LOC 0 5 C 0 034 C C 0 014 C C Plati 38510 2 0 F 0 9 F 0 061 F F 0 025 F F BUnuR 8S ii 0 6 C 05 C 0 017 C C 0 014 C C 1 1 F 0 9 F 0 031 F F 0 025 F F 10002 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 1002 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 2009 1 0 C 0 4 C 0 034 C C 0 011 c C Plat 301610 2 0 F 0 7 F 0 061 F F 0 020 F F UFU 9918 eg 05 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 10002 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 Copper 426 O 10 Not allowed GE 7i F Not allowed amp GE Dos d 0 2 C 0 2 C 0 008 C C 0 008 C C NIERERIGL ENIE il LANKA E 04 F E 0 4 9F CE 0 014 FJ F 2E 0 014 FJ F 0 2 C 0 2 C 0 008 C C 0 008 C C ddr MN 120Q E 04 F E 0 4 9F E 0 014 F F 2E 0 014 F F E0 3 C 0 3 C 0 010 C C 0 010 C C Nickel Iron 518 60492 05 F 05 F E 0 018 F F E 0 018 F F
42. range error is declared for either of the following conditions 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 occurs the channel data word is set to its maximum value 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 for the following conditions Channel is disabled Channel operation is normal the out of range condition clears 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 following reasons Input type is a 10 Copper RTD and the excitation current is set for 0 5 mA which is not allowed 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 Scaling select bits 13 and 14 are setto 01 or 10 and scaling limit words 0 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 gre
43. returns a number between 3 and 50 in its data word This action saves the user time in ladder programming Figure 5 4 User set Scaling Using Proportional Counts Data Format Selected Proportional Counts Data Format Pw 7 Selected Configuration Words 4 amp 5 for Scaling E Selected 1000 Pot a c OD IRR OSS S 0 0 1 0 1 0 0 0 0 0 1 1 1 1 1 0 15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 15 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 0 15 0 Defines lower scale limit for range 1 15 0 Defines upper scale limit for range 1 15 0 Configuration Words For User set Scaling Words 4 to 7 Figure 5 5 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 bits 13 and 14 scaling select of the channel configuration word are 01 Limit Scale 0 and proportional counts mode is selected 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
44. sense wires from module to potentiometer terminal and tie them to one point Shield Potentiometer Chl 0 RTD Chl 0 Sense Chl 0 Return 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 Shield Chl 0 RTD Potentiometer Chl 0 Sense Chl 0 Retum Belden 83503 or Belden 9533 Shielded Cable 3 11 Chapter 3 Installation and Wiring 3 12 To wire your NR4 module follow these steps as shown in Figure 3 7 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 inch lengths Strip about 4 76 mm 3 16 inch 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 e
45. 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 700 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 The following conventions are used throughout this manual Bulleted lists such as this one provide information not procedural steps Numbered lists provide sequential steps or hierarchical information Italic type is used for emphasis Textin this font indicates words or phrases you should type Allen Bradley offers support services worldwide with over 75 Sales Support Offices 512 authorized Distributors and 260 authorized Systems Integrators located throughout the United States alone plus Allen Bradley representatives in every major country in the world Local Product Support Contact your local Allen Bradley representative for sales and order support product technical training warranty support support service agreements Technical Product Assistance If you need to contact Allen Bradley for technical assistance p
46. types using the various data formats Channel Data Word Resolution for RTDs RTD Input Type Data Format Bits 4 and 5 Engineering Units x 1 Engineering Units x 10 Scaled for PID Proportional Counts Default eC OF eC oF eC OF eC oF 100 2 Platinum 385 0 1 C step 0 1 F step 1 Cistep 1 F step 0 0641 C step 0 1154 F step 0 0160 C step 0 0288 F step 200 Q Platinum 385 0 1 C step O l 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 2 Platinum 385 0 1 C step O l 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 Q Platinum 385 0 1 C step O l 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 Q Platinum 3916 0 1 C step O l F step 1 C step 1 F step 0 0507 C step 0 0912 F step 0 0127 C step 0 0228 F step 200 Platinum 3916 0 1 C step O l F step 1 C step 1 F step 0 0507 C step 0 0912 F step 0 0127 C step 0 0228 F step 500 Q Platinum 3916 0 1 C step O l F step 1 C step 1 F step 0 0507 C step 0 0912 F step 0 0127 C step 0 0228 F step 1000 Q 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 0228 F step 10 Q Copper 426 0 1 C step O l F step 1 C step 1 F s
47. up to four RTDs of various types for example platinum nickel copper or nickel iron or other resistance inputs As shown in Figure 1 1 the RTD module supplies a small current to each RTD connected to the module inputs up to 4 input channels The module provides on board scaling and converts RTD 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 the subsection entitled System Overview later in this chapter Chapter 1 Overview Figure 1 1 Simplified RTD Module Circuit Constant Current Source lc 05or2mA RTD Module RTD Sense aro GT Return RTD Sense Gr AID Digital Da uP Circuit Digital Data RTD Conversion Return 51 RTD Sense RTD GT Return RTD Sense RTD 7 Retum ouerpbpeg RTD Compatibility Chapter 1 Overview Table 1 A lists the RTD types you can use with the RTD module and gives each type s associated temperature range resolution and repeatability specifications Table 1 B shows the accuracy and temperature drift specifications f
48. ways to insure that the lead values match as closely as possible They are as follows 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 Wiring 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 2 wire interconnection Figure 3 5 or a 3 wire interconnection Figure 3 6 3 9 Chapter 3 Installation and Wiring Figure 3 5 2 Wire Potentiometer Connections To Terminal Block 2 Wire Potentiometer Interconnection Cable Shield Add J umper S Potentiometer ET Shield Nw ChlO RTD N Chl 0 Sense Return Chl 0 Return 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 Add J umper Shield Chl 0 RTD Potentiometer Chl 0 Sense Return Chl 0 Return Belden 9501 Shielded Cable 3 10 Chapter 3 Installation and Wiring Figure 3 6 3 Wire Potentiometer Connections To Terminal Block Cable Shield Run RTD and
49. word bit 11 1 Retry End Configuration error Check configuration word bits 0 3 for valid input type Bit 15 configuration bits 13 and set 1 14 forvalidscale 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 m Bit14 For over range the input End set 1 gt signal is greater than the Is problem high scale limit for the corrected channel For under range the input signal is less than No the low scale limit for the channel Correct and R etry An open circuit or Y short circuit RTD condition Li Contact your Bit 13 ge EE cranes local distributor set 1 gt or open or loose B connections RTD and Allen Bradle potentiometer inputs and y check channel for short circuit condition RTD only Retry Replacement Parts Contacting Allen Bradley Chapter 7 Module Diagnostics and Troubleshooting The RTD module has the following replaceable parts Table 7 C Parts List Part Part Number Replacement Terminal Block 1746 RT25G Replacement Terminal Cover 1746 R13 Series C 1746 NR4 User Manual 1746 6 7 If you need to contact Allen Bradley for assistance please have the following information available when you call aclear statement of the problem including a description of what the system is actually doing Note and rec
50. 0 0 10 step 10 step 0 030540 step 0 007640 step 10002 0 1Q step 1Q step 0 0610Q step 0 0153Q step 3000 0 10 step 10 step 0 18310 step 0 0458Q step Broken Input Selection Bits 6 and 7 Table 5 M 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 types 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 O ohms which can be a short circuit condition Table 5 M Bit Descriptions for Broken Input Selection Binary ir Value Select Description 00 ZEIG force the channel data word to 0 during an open circuit condition or short circuit condition force the channel data word value to its full scale value during an 01 upscale open circuit or short circuit condition The full scale value is determined by the input type data format and scaling selected force the channel data word value to its low scale value during an 10 downscale open circuit or short circuit condition The low scale value
51. 0 0102 step Values are in 1 degree step or 1 Q step for all resistance input types except 1509 Forthe 150Q resistance input This bit is ignored when a resistance device is selected Applies to proportional counts data format selected using bits 4 and 5 Chapter 5 Channel Configuration Data and Status 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 Table 5 A 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 and proportional counts If you select proportional counts you have the option of using user set scaling bits 13 and 14 Table 5 A 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 Table 5 B Bit Descriptions for Data Format Select Binary F Value Select Description express values in 0 1 degree or 0 1Q or 0 01Q for 150Q pot only 01 engineering units x10 express values in 1 degree or 1Q or 0 1Q for150Q pot only The input signal range for the selected input type is its full scale input range The signal range is scaled into a 0 to 16383 range which is what the SLC processor expects in the PID function The in
52. 0 040 KEn e 0 150 0 145 OBP 16 0 250 OVP16 0 250 NT4 0 060 0 040 NR4 0 050 0 050 HSTP1 0 200 Chapter 3 Installation and Wiring 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 Important The 2 slot SLC 500 fixed I O 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 table at the left to determine whether the combination can be supported In the table e A dot indicates a valid combination No symbol indicates an invalid combination v A triangle indicates an external power supply is required Refer to the Analog I O Module User Manual 1746 6 4 When using the 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 BAS networked or KEn KE networked Make sure to refer
53. 02 F 404 F atinum 3916 Ta 200 C to 4630 C 200 C to 630 C 01 C 02 328 F to 41166 F 328 F to 1166 F 02 F X04 ip 200 C to 630 C 200 C to 430 C 01 C 02 328 F to 41166 F 328 F to 446 F 02 F 04 F 100 C to 4260 C 01 C 02 Copper 426 0 10Q Not allowed amp 148 F to 4500 F 0 2 F GE 0A F 100 C to 260 C 100 Cto 260 C 01 C E01 C Nickel 618 0 1200 148 F to 4500 F 148 F to 4500 F 02 F 02 F 80 C to 4260 C 80 C to 4260 C 01 C 01 C Nickel 672 1202 112 F to 4500 F 112 F to 4500 F 02 F 40 2 F 100 C to 4200 C 100 Cto 200 C 01 C 01 C Nickel Iron 518 604 148 F to 4392 F 148 F to 4392 F 0 2 F 40 2 F The digits following the RTD type represent the temperature coefficient of resistance o which i Platinum 385 refers to a platinum RTD with 0 00385 ohms ohm C or simply 0 00385 C Q The temperature range for the 100082 RTD is dependant on the excitation current G Actual value at 0 C is 9 042 per SAMA standard RC21 4 1966 Actual value at 0 C is 10092 per DIN standard To maximize the relatively small RTD signal only 2 mA excitation current is allowed s defined as the resistance change per ohm per C For instance Important The exact signal range valid for each input type is depe
54. 100 C to 260 C 100 C to 260 C 0 1 C 0 1 C Nickel 618 O 120 148 F to 4500 F 148 F to 500 F 0 2 F 40 2 F 80 C to 260 C 80 C to 260 C 0 1 C 0 1 C Nickel 672 1209 112 F to 500 F 112 F to 500 F 0 2 F 02 F 100 C to 200 C 100 C to 200 C 0 1 C 0 1 C Nickel Iron 518 6040 148 F to 4392 F 148 F to 4392 F 02 F 40 2 F The digits following the RTD type represent the temperature coefficient of resistance oJ which is defined as the resistance change per ohm per C For instance Platinum 385 refers to a platinum R TD with 0 00385 ohms ohm C or simply 0 00385 C Q The temperature range for the 1000 RTD is dependant on the excitation current Actual value at 0 C is 9 042O per SAMA standard RC21 4 1966 Actual value at 0 C is 100Q per DIN standard To maximize the relatively small RTD signal only 2 mA excitation currentis allowed Important The exact signal range valid for each input type is dependent upon the excitation current magnitude that you select when configuring the module For details on excitation current refer to page A 2 Chapter 1 Overview Table 1 B RTD Accuracy and Temperature Drift Specifications RTD Type Accuracy Accuracy Temperature Drift Temperature Drift yp 0 5 mA Excitation 2 0 mA Excitation 0 5
55. 4 1966 Table 5 G Table 5 G to Table 5 I show the resistance ranges provided by the 1746 NRA Data Format for 150 Q Resistance Input Resistance Input Type 1500 Data Format Engineering Units x 1 Engineering Units x 10 0 01 Ohms 0 to 15000 0 1 Ohms 0 to 1500 Scaled for PID 0 to 16383 Proportional Counts Default 32168 to 32767 When ohms are selected the temperature units selection bit 8 is ignored Table 5 H Data Format for 50002 and 1000 2 Resistance Input Data Format Resistance Input Type Engineering Units x 1 Engineering Units x 10 Proportional Counts 0 1 Ohms 1 0 Ohms Scaled or MD Default 5000 0 to 5000 0 to 500 0 to 16383 32768 to 32767 100092 0 to 10000 0 to 1000 0 to 16383 32768 to 32767 When ohms are selected the temperature units selection bit 8 is ignored Table 5 1 Data Format for 3000 Resistance Input Data Format Excitation Current Engineering Units x 1 Engineering Units x 10 Proportional Counts 0 1 Ohms 1 0 Ohmsco B nin p Default 0 5 mA 0 to 30000 0 to 3000 0 to 16383 32768 to 32767 2 0 mA 0 to 19000 0 to 1900 0 to 16383 32768 to 32767 When ohms are selected the temperature units selection bit 8 is ignored Table 5 J Chapter 5 Channel Configuration Data and Status Table 5 J shows the data resolution provided by the 1746 NR4 for RTD input
56. 426 X 120 Q Nickel 0 00618 X 120 Q Nickel 0 00672 X 604 Q Nickellron 0 00518 X gis the temperature coefficient of resistance which is defined as the resistance change per ohm per C International Electrotechnical Commission Standard 751 1983 German Standard DIN 43760 1980 and DIN 43760 1987 U S Standard D100 Scientific Apparatus Makers Association Standard RC21 4 1966 J apanese Industrial Standard J IS C1604 1981 Japanese Standard J IS C1604 1989 Minco Type NA Nickel and Minco Type FA Nickel Iron Actual value at 0 C is 9 0420 per SAMA standard RC21 4 1966 Actual value at 0 C is 100 2 per DIN standard SOL82GO8O 8 ATTENTION 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 Appendix 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 Table 5 A and the detailed configuration information in chapter 5 as needed to complete the procedures in this appendix Or you may prefer to use the summary worksheet on page C 4 Proceed as follows Cha
57. Amps 24V dc Amps 0 050 0 050 When you are using a modular system configuration add the values 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 2 slot expansion chassis on page NO TAG Module Location in Chassis Fixed Controller Compatibility Table 5V dc 24V dc be Amps Amps IA4 Q 0 035 IA8 0 050 IA16 0 085 IM4 0 035 IM8 0 050 IM16 0 085 OA8 0 185 OA16 0 370 OAP12 0 370 IB8 0 050 IB16 Q 0 085 IV8 0 050 IV16 Q 0 085 IG16 0 140 IH16 e 0 085 Ov8 0 135 0V16 0 270 OB8 Q 0 135 OBP8 0 135 0616 e 0 180 Ow4 0 045 0 045 OW8 0 085 0 090 OW16 0 170 0 180 104 0 030 0 025 108 0 060 0 045 1012 0 090 0 070 NIA 0 025 0 085 NI8 e 0 200 0 100 NIO4I 0 055 0 145 NIO4V 0 055 0 115 FIO4I e 0 055 0 150 FIO4V e 0 055 0 120 DCM 0 360 HS 0 300 OB16 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 0X8 0 085 0 090 NO4I V 0 055 0 195 NO4V 0 055 0 145 ITB16 e 0 085 ITV16 0 085 IC16 e 0 085 KE 0 150
58. C is 9 042Q per SAMA standard RC21 4 1966 Actual value at 0 C is 100Q per DIN standard G Values are in 0 1 degree step or 0 192 step for all resistance input types except 1502 For the 150Q resistance input type the values are in 0 0102 step Values are in 1 degree step or 1 Q step for all resistance input types except 1502 For the 150Q resistance input type the values are in 0 1O step This bitis cleared 0 when a resistance device such as a potentiometer is selected 5 20 Chapter 5 Channel Configuration Data and Status Explanations of the status conditions follow Important The status bits reflect the settings that were made in the configuration word However two conditions must be true if the status reflected is to be accurate e The channel must be enabled 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
59. CH 0 Data Word 15 0 e 1 CH 1 Data Word 15 0 l e 2 CH 2 Data Word 15 0 e 3 CH 3 Data Word 15 0 Channel Status Checking Chapter 5 Channel Configuration Data and Status The channel status word Figure 5 7 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 word 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 Figure 5 7 Module Input Image Status Word 1 e 4 CH 0 Status Word 15 0 e 5 CH 1 Status Word 15 0 e 6 CH 2 Status Word 15 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 Table 5 S 5 19 Chapter 5 Channel Configuration Data and Status
60. D module s channel configuration words Figure 6 3 This procedure is described on page 63 Figure 6 3 Copy File Data Flow ADDRESS SOURCE DATA FILE ADDRESS DESTINATION DATA FILE Gsannen configuration Word T oss Graneer ouepst wora o Grenner configucation wora i 0 21 cnannel oer wora 1 Granner configuration word 2 gt 0 9 2 Channel Output Word 2 nennen configuration wora 3 0 3 3 onannel output wora 3 N10 0 N10 1 N10 2 N10 3 6 2 Chapter 6 Ladder Programming Examples Procedure 1 Using the memory map function to create a data file create integer file N10 Integer file N10 should contain four elements N10 0 through N10 3 2 Using the APS data monitor function enter the configuration parameters for all four RTD channels into a source integer data file N10 Refer to Figure 6 2 for the bit values See appendix C 4 for a channel configuration worksheet address 15 data 0 address 15 data 0 N10 0 0000 1001 0001 0001 N10 1 0000 1001 0001 0001 N10 2 0000 1001 0001 0001 N10 3 0000 1001 0001 0001 Press a key or enter value N10 3 0 1 offline no forces binary data decimal addr File EXMPL CHANGE SPECIFY NEXT PREV RADIX ADDRESS FILE FILE F1 F5 F7 F8 3 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 To do this program a rung as
61. Hazardous Environment Agency Certification eUL and CSA Class I Division 2 Groups A B C D certified when product or packaging is marked eCE compliant for all applicable directives Input Specifications RTD Types platinum nickel nickel iron copper For additional information on RTD types see page A 3 Temperature Scale Selectable C or F and 0 1 C or 0 1 F Resistance Scale Selectable 1Q or 0 10 for all resistance ranges or 0 1Q or 0 010 for 1500 potentiometer Input Step Response See channel step response page 4 4 Input Resolution and Repeatability See RTD and resistance device compatibility tables on page 1 3 Display Resolution See Channel Data Word Resolution table on page 5 11 Module Update Time See Chapter 4 Update Time page 4 10 Channel Turn On Time Requires up to one module update time plus one of the following e 250 Hz Filter 388 milliseconds e 60 Hz Filter 1 300 milliseconds e 50 Hz Filter 1 540 milliseconds e 10Hz Filter 7 300 milliseconds Channel Turn Off Time Requires up to one module update time refer to page 4 11 Reconfiguration Time Requires up to one module update time plus one of the following e 250 Hz Filter 124 milliseconds e 60 Hz Filter 504 milliseconds e 50 Hz Filter 604 milliseconds e 10Hz Filter 3 004 milliseconds RTD Excitation Current Two current values are user selectab
62. RTD3 Pilot Light 0 2 0 kaura Pilot Light 0 2 3 o Ch 0 Alarm Ch 1Alarm Ch 2 Alarm Ch 3 Alarm we Pushbutton S witch 1 1 1 u Sess Autocalibration IL L s i c C e S Pilot Light 0 2 2 Display Panel ae Selector S witch 1 0 6 1 Chapter 6 Ladder Programming Examples Initial Programming To enter data into the channel configuration word O e 0 through O e 3 when the channel is disabled bit 11 0 follow the example below Refer to Table 5 A for specific configuration details Example As shown in Figure 6 2 configure four channels of a RTD module residing in slot 3 of a 1746 chassis Configure each channel with the same parameters Figure 6 2 Configuration Word Setup 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0f 1 BitSetting Configures Channel For 200 Q 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 4 data words from an integer file you create in the SLC s memory to the RT
63. a scaling P 5 input device type 5 5 bit description in configuration word 5 5 bit description in status word 5 21 input filter See filter frequency input image 4 3 input response to slot disabling 4 11 input specifications A 2 installation 3 1 3 5 equipment required 2 1 getting started 2 1 heat and noise considerations 3 3 in fixed controller expansion chassis 3 3 in modular chassis 3 2 L LED indicators 1 5 channel status 1 6 1 9 module status 1 6 1 9 State tables 7 2 local configuration P 5 Index RTD resistance Input Module User Manual LSB P 5 M manuals related P 3 module accuracy A 3 module ID code 4 1 how to enter 4 1 module operation 1 8 module to processor communication channel configuration word 1 10 channel data word 1 10 channel status word 1 10 scaling limit words 1 10 multiplexing 1 8 multiplexor P 5 N noise filtering 4 3 normal mode rejection P 5 O open circuit 7 4 error condition 7 4 out of range error 7 5 bit description in status word 5 23 over range error 5 23 fault bit 5 23 under range error 5 22 fault bit 5 22 output image 4 2 output response to slot disabling 4 11 over range error 5 23 fault indicator bit 5 23 P physical specifications A 1 PID inputtype 5 5 PID instruction 6 7 application example 6 7 programming 6 7 pinout diagram 3 6 pot definition P 5 potentiometer 1 5 A 5
64. ach channel on the NR4 module Wiring Input Devices to the NR4 Module Figure 3 7 Shielded Cable 2 Conductor Shielded Cable f See step 4 Signal Wire Signal Wire Drain Wire Foil Shield gna WIS anale See step 3 3 Conductor Shielded Cable Signal Wire pi See step 4 Signal Wire Signal Wire Signal Wire Drain Wire Foil Shield Signal Wire See step 3 Signal Wire Calibration Chapter 3 Installation and Wiring The accuracy of a system that uses the RTD module is determined by the following the accuracy of the RTD resistance mismatch of the cable wires that connect the RTD to the module 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 4 pin calibration connector on the RTD module circuit board is used for factory setup only Autocalibration When a channel becomes enabled the module configures the channel and performs an autocalibration 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 con
65. ake this setting be sure to enter low and high scale values into configuration words 4 and 5 This procedure is explained on page 5 15 under User set Scaling define a range range 1 that your proportional counts data will be scaled to Configuration word 6 contains the low scale limit and configuration word 7 contains the high scale limit If you make this setting be sure to enter low and high scale values into configuration words 6 and 7 This procedure is explained on page 5 15 under User set Scaling ll not used configuration error 00 Use module defined scaling 01 Use configuration words 4 and 5 for scaling range 0 10 Use configuration words 6 and 7 for scaling range 1 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 page 5 6 scaled for PID and 5 7 proportional counts for considerations when using default values 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 or10 Here the user 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 The user defines what the upper and lower limits are going to be by placing the range in the user set scaling words
66. an RTD Platinum 2002 o 0 00385 C range 200 C to 850 C scaled for PID display type Desired channel temp 344 C Want to calculate Scaled for PID equivalent From Channel Data Word Format Table 5 C through Table 5 H Stow 200 C and Spigy 850 oC Solution Scaled for PID Equivalent 16383 x 344 C 200 C 850 C 200 C 2 8488 Proportional Counts to Engineering Units Equation Engr Units Equivalent Sj ow Suicu Stow x Proportional Counts value displayed 32768 65536 Assume that input type is a potentiometer 100002 range 0 to 100092 proportional counts display type Channel data 221567 Wantto calculate ohms equivalent From Channel Data Word Format Table 5 C through Table 5 H SLow 2 0Q and Syigy 100082 Solution Engr Units Equivalent 0Q 1000 2 0 2 x 21567 32768 65536 829Q Engineering Units to Proportional Counts Equation Proportional Counts Equivalent 65536 x Engineering Units desired Stow Suigu Stow 1 32768 Assume that input type is a potentiometer 3000 2 range 0 to 3000 2 proportional counts display type Desired channel resistance value 18090 Want to calculate Proportional Counts equivalent From Channel Data Word Format Table 5 C through Table 5 H Stow 2 0 2 and Suicu 7 30000 Solution Proportional Counts Equivalent 65536 x 180922 0Q 3000 2 0 2 32768
67. annel to channel common mode isolation is limited to 1 volt Chapter 1 Overview LED Status Figure 1 4 shows the RTD module LED panel consisting of 5 LEDs The state of the LEDs for example off on or blinking depends on the operational state of the module see Table 1 E Figure 1 4 LED Indicators 0 S WEE WM We WS WA QA SS SS N Va DSL sl I CHANNEL o STATUS MobpuLESTATUS O RTD MODULE The purpose of the LEDs is as follows e Channel Status One LED for each of the 4 input channels indicates if the channel is enabled disabled or is not operating as configured due to an error Table 1 E Module Status If OFF at any time other than at powerup this LED indicates that non recoverable module errors for example diagnostic or operating errors have occurred The LED is ON if there are no module errors The status of each LED during each of the operational states for example powerup module operation and error is depicted in the following table Table 1 E LED POWER UP MODULE OPERATION MODULEERROR CHANNEL ERROR No Error Ch 0 Status Off On Offo Off Blinks Ch 1 Status ofa On 0f off Blinks Ch 2 Status Off On Offo Off Blinks Ch 3 Status Off On Offo Off Blinks Mod Status Off On Off On Channel status LED is On if the respective channel is enabled and Off if the channel is disabled Module is disabled during powerup Chapt
68. assis 1746 A2 The module uses eight input words and eight output words Important If the RTD module resides in a remote configuration with a SLC 500 Remote I O Adapter Module 1747 ASB use block transfer for configuration and data retrieval Block transfer requires a 1747 SN Remote I O Scanner Series B or PLC processor As shown in Figure 1 2 and Table 1 D 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 Chapter 1 Overview Figure 1 2 RTD Module Hardware 6 1 INPUT 5 al CHANNEL Lola 5 ja 2 STATUS J f u Nu e i je _ MODULE STATUS E 6 2 RTD resistance 8 EG ad G9 SHIELD E 3 z cave SHIELD 3 335 3 fe F3 I E s FF CHLO SENSE P m RETRN en 8 SHIELD I amp cHL2 SHIELD gd RTD 833 CHL2 Ps age amp SENSE a i cua sense 3T az RETRN g2 4d i RETAN id 3 i 4 SHIELD ad E i 8
69. ate 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 is reconfigured only when the selector switch changes position ec oF Degrees Selector Switch 3 Convert the individual RTD data words to BCD and send the data to the respective LED displays 8 7 Chapter 8 Application Examples Program Listing The first two rungs of this program Figure 8 6 send the correct channel setup information to the RTD module based on the position of the degrees selector switch Figure 8 6 Program to Display Data On LEDs 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 aad 1 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 four channels to read in degrees Celsius Degrees Selector Switch Configure RTD Celsius Module Channels I 2 0 B3 COP 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 I 1 1 Dest 0 4 0
70. ater 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 5 23 Device Configuration Chapter Ladder 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 initial programming of the configuration word dynamic programming of the configuration word verifying channel configuration changes interfacing the RTD module to a PID instruction using proportional counts scaling example monitoring channel status bits invoking autocalibration Figure 6 1 is used for clarification of the ensuing ladder logic examples and is not intended to represent an RTD application Important Chapter 8 shows a typical application for the RTD module Figure 6 1 Application Setup 1746 NR4 RTD Module 1746 0B8 DC Output Module Sourcing 1746 1B8 DC Input Module Sinking SLC Processor N Z RIDO N 80 1 2 3 RTD 1 x a RD Pilot Light O 2 1
71. ation LOT POWeIUD soe ua AER aai a aw RS REA A A EAA de A Module Operation aaa LED SAUS uiu adore A D PRESE ERR EAR AC AARRE R UR Module to Processor Communication 0 0 Chapter 30 Required Tools and Equipment 5 sese re Rs Procedures eoi sabxedA2uhEnixrewRESERA SERRA RR E EGSXAIN EEYA Chapter 31 Compliance to European Union Directives 1 ccc eee EMC Dicive ox ba dx bos d sc CP LEUR eae tee seed ah deca did Electrostatic Damage uaa d tiani eed aAa EMA debeo eih NR4 Power Requirements ccc cece cece enn Module LOCSUONINCHASSIS uscecsus ihr ecce sd vba Ere 23 ded Modular Chassis Considerations 0 0 0 ccc eee eee Fixed Expansion Chassis Considerations 0000s General Considerations 2 0 ccc cc cece cece nn nnn Module Installation and Removal cece eee cette eee ees Removing the Terminal Block 1 ccc cece eee eee eens Installing the Module cece ccc eee cette e Removing the Module ccc cece cece eee e eens Terminal WING 2 95 Lee oop ebd OVE eae ae Saw ae eds cuo NR4 Wiring Considerations uses xe e kr Sx ep ER XEXA EYES RY LEUR Ore NAG RTD Resistance Input Module User Manual Preliminary Operating Considerations Channel Configuration Data and Status Wiring Resistance Devices Potentiometers to the NR4 Module 3 9 Wiring Input Devices to the NR4 Module ccc cece eee eee es 3 12 CalibIaubI iussus ERR 3A ERE near dees nd
72. ation times 4 9 configuration error 7 4 bit description in status word 5 23 definition P 4 filter frequency 4 3 effects on noise filtering 4 3 effects on update time 4 3 channel status bit 5 22 bit description in status word 5 22 channel timing channel scan time 4 9 channel update time 4 9 chassis P 4 CMRR P 4 common mode rejection ratio P 4 common mode voltage P 4 compatibility 1 3 with RTD sensors 1 3 with SLC controllers 1 3 configuration word P 4 4 2 5 1 5 18 factory default setting 5 1 worksheet C 4 configuring a channel 5 1 worksheet C 4 connection diagram 3 6 contacting Allen Bradley for assistance P 7 contents of manual P 2 current consumption 3 2 A 1 cut off frequency P 4 4 6 D data word P 4 4 3 resolution 5 11 data word format 5 5 bit description in configuration word 5 5 bit description in status word 5 21 scaling ranges by input type 5 9 dB P 4 decibel P 4 default setting of configuration word 5 1 definitions P 4 diagnostics 7 1 at power up 7 1 channel diagnostics 7 1 ifferential mode rejection See normal mode rejection digital filter P 4 disabling a channel 5 13 door label 1 6 e I 2 Index RTD resistance Input Module User Manual dynamic channel configuration 6 4 E effective resolution as a function of filter frequency 4 5 definition P 5 electrical noise 3 2 electrical specifications A 1 Electrostatic
73. caling 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 5 2 Chapter 5 Channel Configuration Data and Status and upper limits in words 4 and 5 defines range 0 or 6 and 7 defines range 1 9 Make sure a zero is in bit 15 This bit is not used 10 Build the channel configuration word using the configuration worksheet on page C 4 for every channel on each RTD module repeating the procedures given in steps 1 9 Enter the Configuration Data Following the steps outlined in chapter 2 Quick Start or chapter 6 Ladder Programming Examples enter your configuration data into your ladder program and copy it to the RTD module 5 3 Chapter 5 Channel Configuration Data and Status Table 5 A Channel Configuration Word 0 e 0 through O e 3 Bit Definitions Make these bit settings in the Channel Configuration Word Bit s Define 0 3 Input type selection To Select 100 2 Pt RTD 385 15 14 13 12 11 10 9 8 7 6 5 4 200 2 Pt RTD 385 500 2 Pt RTD 385 10002 PtRTD 385 100 PtRTD 391 a 200 2 PtRTD 3916 500 2 PtRTD 3916 Not used 1000 2 Pt RTD 3916 DI Co Of CO CO CO CO CO w amp 102 Cu RTD 426 120 Ni RTD 618 120Q Ni RTD 672 604 2 NiFe RTD
74. ction 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 Hz 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 Table 4 A on page 4 4 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 4 7 and 4 8 show the input channel frequency response for each filter frequency selection Chapter 4 Preliminary Operating Considerations 4 4 Channel Step Response The channel filter frequency determines the channel s step response The step response is the time required for the analog input signal to reach 100 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 Table 4 A shows the step response for each filter frequency Table 4 A Notch Frequencies Filter Frequency 50HzNMR 60HzNMR Banal Step Response 10 Hz 100 dB 100 dB 2 62 Hz 300 msec 50 Hz 100 dB 13 1Hz 60
75. cut off frequency for each input channel is defined by its filter frequency selection Table 4 A 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 4 9 for determining the channel update time Chapter 4 Preliminary Operating Considerations Figure 4 2 10 Hz Filter Notch Frequency 3 dB Amplitude in dB 100 120 140 160 180 200 0 10 20 30 40 50 60 Hz Frequency 2 62 Hz Frequency Response Figure 4 3 50 Hz Filter Notch Frequency 3 dB 100 120 140 160 180 200 Amplitude in dB 0 50 100 150 200 250 300 Hz 13 1 Hz Frequency Frequency Response Chapter 4 Preliminary Operating Considerations Figure 4 4 60 Hz Filter Notch Frequency 3 dB Amplitude in dB 100 120 140 160 180 200 0 60 120 180 240 300 Hz Frequency I9 Frequency Response Figure 4 5 250 Hz Filter Notch Frequency 3 dB Amplitude in dB 100 120 140 160 180 200 0 250 500 750 1000 1250 1500 uz Frequency 65 5 Hz
76. d Smax word 7 and Minimum Scaled Smin word 8 match the module s minimum and maximum scaled range in engineering units e g 200 C to 850 C for that channel This allows you to accurately enter the setpoint in engineering units C F Figure 6 7 Programming for PID Application Rung 2 0 First Pass Bit Initialize NR4 Channel 0 S 1 MOV 1t MOVE 15 Source N10 0 Dest 0 3 0 Entering address N11 0 allocates elements N11 0 to N11 22 for required Control Block file length of 23 words The Process Variable is address Rung 2 1 Channel 0 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 d d address PID PID 11 Control Block N11 0 Process Variable 1230 Control Variable N11 23 Control Block Length 23 6 7 Chapter 6 Ladder Programming Examples The Rate and Offset parameters should be set per your application The Destis typically an analog output Rung 2 2 channel Refer to the APS User Manual or Analog I O Modules User Manual for specific examples of the SCL instruction sci SCALE __ Source N11 23 Rate 10000 Offset Dest Rung 2 3 END Data Table address 15 data 0 address 15 data 0 N10 0 0000 1000 0010 0100 6 8 Chapter 6 Ladder Programming Examples Using the Proportional The RTD module can be set up to return data to the user program that
77. d below the channel LED blinks and bit 13 of the channel status word is set Possible causes of an open or short circuit include The RTD or potentiometer may be broken A RTD or potentiometer wire may be loose or cut The RTD or potentiometer may not have been installed on the configured channel The RTD may be internally shorted 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 Chapter 7 Module Diagnostics and Troubleshooting 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 Table 5 C to Table 5 I or the user specified range in configuration words 4 7 if proportional counts is used Possible causes of an out of range condition include The temperature is too hot or too cold for the RTD being used Wrong RTD used for type configuration selected Bad potentiometer or RTD Signal input from either potentiometer or RTD is beyond the user set scaling range Module
78. damage 3 2 EMC Directive 3 1 enabling a channel 5 13 bit description in configuration word 5 13 engineering units input 5 5 environmental specifications A 2 equipment required for installation 2 1 error codes 7 3 errors 7 4 detecting channel related errors 7 4 configuration error 7 4 open circuit 7 4 over range error 7 5 under range error 7 5 detecting module related errors 7 5 conditions tested at power up 7 5 over range error 7 5 examples how to address configuration word 4 2 how to address data word 4 3 how to address status word 4 3 how to use PID instruction 6 7 how to use proportional counts data format 6 9 Supplementary application example 8 4 using alarms to indicate status 6 10 verifying channel configuration changes 6 5 excitation current P 4 5 22 A 3 bit description in status word 5 22 definition P 4 specifications A 3 European Union Directives Compliance 3 1 F filter frequency P 5 bit description in configuration word 5 13 bit description in status word 5 21 full scale error P 5 full scale range P 5 G gain drift P 5 gain error P 5 See also full scale error getting started See quick start guide grounding cable shield 3 7 guidelines 3 7 H hardware overview 1 5 hazardous environment classification A 2 heat considerations 3 3 ID code 4 1 image table input image 1 10 output image 1 10 input channel multiplexing 1 8 input dat
79. dition open circuit for RTD or resistance 21 input and short circuit for RTD Blinking inputs only ON Out of Range Condition Channel Configuration Error Power Up ff 9 Channel Not Enabled No action required For an example of how to enable a channel refer to chapter 6 Ladder Programming Examples Chapter 7 Module Diagnostics and Troubleshooting Table 7 B explains the function of the module status LED Table 7 B Module Status LED State Table If Module Status Indicated Condition Corrective Action LED is On Proper Operation No action required Cycle power If condition persists replace the module or call or ModuleiFault your local distributor or Allen Bradley for assistance Error Codes T O error codes are reported in word S 6 of the SLC processor status file The format for the error codes in the status word S 6 is shown in Figure 7 2 The characters denoted as XX in Figure 7 2 represent the slot number Hex for the module The characters denoted as YY represent the 2 digit hex code for the fault condition 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 and MicroLogix 1000 Instruction Set Reference Manual Publication 1747 6 15 Figure 7 2 Error Code Format X X Y Y Pd QE P d ies a TS rd SS a w XX Chassis Slot Number Hex YY Error Code Hex
80. e 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 The user set Scaling Limit Words output image provide a user definable scaling range for the temperature resistance data when using the proportional counts data type Required Tools and Equipment Chapter 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 understand electronic process control beable to interpret the ladder logic instructions for generating the electronic signals that control your application Because it is a start up guide this chapter does not contain detailed explanations about the procedures listed It does 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 ref
81. e RTD module performs operations at two levels module level operations 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 circuit RTDs only detection Internal diagnostics are performed at both levels of operation and any error conditions detected are immediately indicated by the module s LEDs and status to the SLC processor At module power up a series of internal diagnostic self tests is performed The module status LED and all channel status LEDs remain off during powerup If any diagnostic test fails the module enters the module error state If all tests pass the module status LED is turned on and the channel status LED 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 Chapter 7 Module Diagnostics and Troubleshooting LED Indicators A failure of any channel diagnostic test causes the faulted channel status LED to blink All channel
82. e input to a value within the range you selected for the 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 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 Referring to Figure 1 1 each input channel consists of an RTD connection which provides excitation current asense connection which detects lead wire resistance areturn connection which reads the RTD or resistance value Each of these analog inputs are multiplexed to 1 of 2 analog convertors 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 barrier Ch
83. ecifications 2asccaxscuswsrx ates vans dns dente EEVARAEEYA A 5 Appendix B Appendix C Channel Configuration Procedure ccc cect eee eens C 1 Who Should Use this Manual Purpose of this Manual Preface Preface Read this preface to familiarize yourself with the rest of the manual This preface covers the following topics who should use this manual the purpose of this manual terms and abbreviations conventions used in this manual Allen Bradley support Use this manual if you are responsible for designing installing programming or troubleshooting control systems that use Allen Bradley small logic controllers You should have a basic understanding of SLC 500 products 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 If using Advanced Programming Software APS we recommend that you review The APS Quick Start for New Users Publication 9399 APSQS This manual is a reference guide for the 1746 NR4 RTD Resistance Input Module The manual gives you an overview of system operation explains the procedures you need to install and wire the module at the customer site provides ladder programming examples provides an application example of how this input module can be used to con
84. 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 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 logical 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 smalle
85. equencies Greater than 100 dB at 60 Hz 10 Hz 60 Hz filter frequencies aximum common mode voltage 1 volt aximum allowed permanent overload Volts 5V dc Current 5 mA nput 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 autocalibrates when a channel is enabled or when a change is made to its input 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 Do not apply a voltage or current to the module LED Indicators 5 green status indicators one for each of 4 channels and one for module status Module ID Code 3513 Maximum Termination Wire Size Two 14 AWG wire per terminal Maximum Cable Impedance 25 ohms maximum impedance for 3 wire RTD configuration see Cable Specifications Terminal Block Removable Allen Bradley spare part Catalog Number 1746 RT25G Appendix A Specifications Module Environmental Specifications Operating Temperature 0 C to 60 C 32 F to 140 F Storage Temperature 40 C to 85 C 40 F to 185 F Relative Humidity 5 to 95 without condensation Hazardous Environment Classification Class I Division 2
86. er 1 Overview Module to Processor Communication As shown in Figure 1 5 the RTD module communicates with the SLC processor through the backplane of the chassis The RTD module transfers data to receives data from the processor by means of an image table The image table Table 1 F consists of 8 input words and 8 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 4 2 and 4 3 Figure 1 5 Communication Flow Channel Data Words RT Channel Status Words RTD resistance nu e Analog Signals Module Scaling Limit Words Z a Channel Configuration Words Chassis Backplane Table 1 F Image Table Input Image Word Function Output Image Word Function 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 3 configuration 4 Channel 0 status 4 User set Lower limit scale 0 5 Channel 1 status 5 User set Upper limit scale 0 6 Channel 2 status 6 User set Lower limit scale 1 7 Channel 3 status 7 User set Upper limit scale 1 Th
87. erenced chapters and other recommended documentation before trying to apply the information This chapter tells you what equipment you need explains how to install and wire the module shows you how to set up one channel for RTD or resistance input examines the state of the LEDs at normal startup examines the channel status word Have the following tools and equipment ready medium blade screwdriver medium cross head screwdriver RTD module 1746 NR4 RTD sensor or resistance input appropriate cable 1f needed programming equipment All programming examples shown in this manual demonstrate the use of Advanced Programming Software APS for personal computers Chapter 2 Quick Start Procedures Ea Procedure Unpacking Module Reference Unpack the module making sure that the contents include e RTD module Catalog Number 1746 NR4 e installation instructions Publication Number 1746 5 17 7 If the contents are incomplete call your local Allen Bradley representative for assistance ee Procedure Determining Power Requirements Reference Review the power requirements of your system to see that your chassis supports placement of the Chapter 3 RID edie ji vee d DEM Installation and e The fixed 2 slot chassis supports two RTD modules If combining an RTD module with a Wiring different module refer to the module compatibility table found in chapter 3 Appendix A e For modular style systems calculate the total l
88. error has occurred If the Module Status LED is off or if the Channel 0 LED is off or blinking refer to Rae chapter 7 Data and Status Chapter 7 Module Diagnostics and Troubleshooting Chapter 8 Application Examples Figure 2 9 Monitoring Status SLC 500 Controller zu Data Files Input Image 8 words Output Image Word 0 Channel 0 Data Word Word 1 Channel 1 Data Word Word 2 Channel 2 Data Word Word 3f Channel 3 Data Word Out Of Range Error c BrokenInput Error o Excitation Current Channel Status Filter Frequency Broken Input Data Forrrat Input Type Configuration Error D 5 0 Channel 0 Status Word lt _0 0 11010 0 0 0 0 0 0 0 0 Channel 1 Status Word Bit 15 Address Bit 0 Channel 2 Status Word 14 Word 7 Channel 3 Status Word Forthis example only bit 11 is set during normal operation 2 11 Compliance to European Union Directives Chapter Installation and Wiring This chapter tells you how to avoid electrostatic damage determine the RTD module s chassis power requirement choose a location for the RTD module in the SLC chassis install the RTD module 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 follo
89. faults are indicated in bits 13 15 of the channel s status word Channel faults are self clearing bits 13 and 14 of status word Bit 15 is not cleared until the user makes the correct change to the channel configuration The channel LED 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 LEDs Figure 7 1 Four of these are channel status LEDs numbered to correspond to each of the RTD resistance input channels and one is a module status LED Figure 7 1 LED Display INPUT CHANNEL 0 STATUS i MODULE STATUS RTD resistance Channel LEDs Module Status LED Table 7 A explains the function of the channel status LEDs while the module status LED is turned on Corrective Action No action required To determine the exact error check the error bits 13to 15 in the input image Check the channel configuration word for valid data Make sure that the input type is indicated correctly in bits 0 3 Refer to the troubleshooting flowchart on page 7 6 and to chapter 5 for more information No action required Table 7 A LED Status Description If Module And Status Indicated Condition Status LED LED is is On Channel Enabled Broken Input Con
90. figuration Autocalibration performs an A D conversion on the zero voltage analog common and the full scale voltage A D reference voltage on the following signals lead wire signal e RTD resistance signal excitation current signal Important Channel calibration time is shown in Table 4 C 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 You can command your module to perform an autocalibration 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 autocalibration refer to page 4 11 It is important to remember that during autocalibration the module is not converting input data 3 13 Chapter 3 Installation and Wiring gt To maintain system accuracy we recommend that you periodically perform an autocalibration cycle for example whenever an event occurs that greatly changes the internal temperature of the control cabinet such as opening or closing its door ataconvenient time when the system is not making product such as during a shift change An autocalibration 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 combinat
91. 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 the Figure 5 4 the user has programmed the channel 3 configuration word for 1000 potentiometer bits 0 to 3 proportional counts data format bits 4 amp 5 and configuration words 4 amp 5 for scaling bits 13 amp 14 The program for the following example is described on page 6 9 in chapter 6 The user desires to control the line speed of a conveyor A 10000 potentiometer is used to sense the conveyor line speed The line speed varies between 3 ft minute 0 ohms and 50 ft minute 1000 ohms As shown in Figure 5 4 the user selects a 1000 potentiometer as the input type If the user chooses engineering units as the data format the module 5 15 Chapter 5 Channel Configuration Data and Status 5 16 CH 3 Configuration Word 0 e 3 Range 0 Lower scale limitsetfor 3 O e 4 Upper scale limit set for 5o O e 5 0 e 6 0 e 7 data word is a value between 0 and 1000 ohms However if the user chooses 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 see Figure 5 4 In this situation the RTD module
92. g to the status file in your modular SLC processor you can disable any chassis slot Refer to your SLC programming manual for the slot disable enable procedure ATTENTION Always understand the implications of disabling a RTD module in your application before using the slot disable feature 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 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 4 11 Channel Configuration Chapter Channel Configuration Data and Status This chapter examines the channel configuration word and the channel status word bit by bit and explains how the module uses configuration data and generates status during operation It gives you informatio
93. ge tables are defined for the RTD module Figure 4 1 Memory Map Bit 15 Bit 0 Address RTD Module NOUS Tee Data Files g Output Image Words Oe Output Image f 8 Words User setUpper Scale Limit Range 1 LimitRange 1 Word 7 0 e 7 Address Input Image Input Image 8 Words Channel 0 Data Word Word0 Le 0 Channel 1 Data Word Wordl kel Class 1 Input Image Channel 2 Data Word Word2 Le2 Channel 3 Data Word Word3 Le Channel 0 Status Word Word4 e 4 Channel 1 Status Word Word5 ke5 Channel 2 Status Word Word6 L e 6 Channel 3 Status Word Word7 ke 7 Bit 15 Bit 0 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 counts data format Each output word 0 3 configures a single channel Example If you want to configure channel 2 on the RTD module located in slot 4 in the SLC chassis your address would be O 4 2 Slot File Type J P Word 4 X Element Word Delimiter Delimiter Chapter 5 Channel Configuration Data and Status gives you detailed bit informatio
94. gives examples of the ladder programming necessary to achieve the desired result Appendix A S pecifications 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 for RTD Resistance Module Provides a worksheet to help you configure the module for operation P 2 Preface Related Documentation The following documents contain information that may be helpful to you as you use Allen Bradley SLC products To obtain a copy of any of the Allen Bradley documents listed contact your local Allen Bradley office or distributor For Read this Document EE An overview of the SLC 500 family of products SLC 500 System Overview 1747 2 30 A description on how to install and use your Modular SLC 500 Installation amp Operation Manual for Modular Hardware 1747 6 2 programmable controller Style Programmable Controllers i A description on how to install and use your Fixed SLC 500 Installation amp Operation Manual for Fixed Hardware Style 1747 6 21 programmable controller Programmable Controllers i A procedural manual for technical personnel who use APS to develop Rockwell Software Advanced Programming Software 9399 APSUM control applications APS U
95. he 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 Temperature Counts 200 C 32 768 630 C 32 767 Figure 5 3 shows the linear relationship between output counts and temperature when one uses proportional counts data format Figure 5 3 Linear Relationship Between Temperature and Proportional Counts Counts 32 768 5 7 Chapter 5 Channel Configuration Data and Status 5 8 Scaling Examples The following examples are using the default scaling ranges Scaled for PID to Engineering Units Equation Engr Units Equivalent Siow I Suigu SLow x Scaled for PID value displayed 16383 Assume that the input type is an RTD Platinum 2002 a 0 00385 C range 200 C to 850 C scaled for PID display type Channel data 3421 Want to calculate C equivalent From Channel Data Word Format Table 5 C through Table 5 H Sj ow 200 C and Suc 850 C Solution Engr Units Equivalent 200 C 850 C 200 C x 3421 16383 2 19 25 C Engineering Units to Scaled for PID Equation Scaled for PID Equivalent 16383 x Engineering Units desired Stow Suigu Stow Assume that the input type is
96. in this publication Allen Bradley publication SGI 1 1 Safety Guidelines for the Application Installation and Maintenance of Solid State Control available from your local Allen Bradley office describes some important differences between solid state equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication Reproduction of the contents of this copyrighted publication in whole or in part without written permission of Allen Bradley Company Inc is prohibited Throughout this manual we use notes to make you aware of safety considerations ATTENTION Identifies information about practices or circumstances that can lead to personal injury or death property damage or economic loss Attention statements help you to identify a hazard avoid the hazard recognize the consequences Important Identifies information that is critical for successful application and understanding of the product PLC PLC 2 PLC 3 and PLC 5 are registered trademarks of Allen Bradley Company Inc SLC SLC 500 MicroLogix PanelView RediPANEL and Dataliner are trademarks of Allen Bradley Company Inc IBM is a registered trademark of International Business Machines Incorporated Belden is a trademark of Belden Inc Summary of Changes Summary of Changes The information below summarizes the changes to this manual since the last printing as 1746 6 7
97. input devices You configure each channel to accept either input When configured for RTD input types the 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 3 wires When using 4 wire RTD sensors one of the 2 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 3 6 for more information Chapter 1 Overview System Operation The RTD module has 3 operational states power up module operation error module error and channel error Power up At power up the RTD module checks its internal circuits memory and basic functions via hardware and software diagnostics During this time the module status LED remains off If no faults are found during the power up diagnostics the module status LED is turned on After power up checks are complete the RTD module waits for valid channel configuration data from your SLC ladder logic program channel status LEDs 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 LEDs go on and the module continuously converts the RTD or resistanc
98. ion Current 0 z excitation current 2 2 0 mA 1 excitation current 2 0 5 mA C 2 Appendix C NR4 Configuration Worksheet 8 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 Select 01 configuration words 4 and 5 used for scaling range 0 13 and 14 Scaling 10 configuration words 6 and 7 used for scaling range 1 11 2 not used invalid setting 9 Make sure a zero is in bit 15 This bit 1s not used 10 Build the channel configuration word for every channel that is being used on each RTD module repeating the procedures given in steps 1 9 11 Enter the completed configuration words for each module into the summary worksheet on the following page 12 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 C 3 Appendix C NR4 Configuration Worksheet Channel Configuration
99. ion to greater than 0 2 C when the RTD is operating at 50 C 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 autocalibrations 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 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 We recommend you use a 2 ppm temperature coefficient resistor 5 Use the RTD module to determine the temperature equivalent to the fixed precision resistor and cable combination 6 Calculate the offset value by subtracting the calculated calibration temperature from the measured temperature 7 Reconnect the RTD to the cable 8 Use ladder logic to apply subtract the offset from the measured temperature to obtain corrected temperature 3 14 Module ID Code Chapter Preliminary Operating Considerations This chapter explains how the RTD module and
100. ire 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 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 Route RTD resistance input wiring away from any high voltage I O wiring power lines and load lines 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 Follow system grounding and wiring guidelines found in your SLC 500 Installation and Operation Manual publication 1747 6 2 3 7 Chapter 3 Installation and Wiring Figure 3 4 RTD Connections To Terminal Block 2 Wire RTD Interconnection Cable Shield S S Shield amp Add J umper G RTD chloRTD amp a Or Sy G Chl 0 Sense 5 P Terminal P in outs Retum Chl 0 Return aa ani L reum ee Belden 9501 Shielded Cable ane Shield Chl 0 RTD cni 3 Wire RTD Interconnection Cable Shield Chio RTD Sense Chl 1 Chl0 Sense Shield Retur Chi 1 Return
101. is Counts Data Format with the specific to the application Assume that the user controls the line speed of a User set Scaling conveyor using a 1000 potentiometer connected to channel 0 of the RTD module The line speed will vary between 3 feet minute when the potentiometer is at OQ and 50 feet minute when the potentiometer is at 10002 Example Configure the RTD module to return a value between 3 and 50 in the data word for channel 0 Proceed as follows 1 Set bits 0 3 of configuration word 0 to 1110 to select the 1000 Q potentiometer input type 2 Set bits 4 and 5 of configuration word 0 to 11 to select proportional counts data format 3 Set bits 13 and 14 of configuration word 0 to 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 Figure 6 8 Programming for PID Applications Rung 2 0 First Pass Bit Initialize RTD module 8 1 EOE Six elements are copied from the specified source E COPY FILE 10 address N10 0 to the specified output 0 3 0 Each 15 a Min 2 3 element is a 16 bit integer as shown in the data table n h DE at the bottom of the page engt Rung 2 1 Channel 0 Status Set speed of conveyor motor i bers 1 34 SCL The Source of this instruction is the data word from the t SCALE L4 RTD module which is a number between 3 50 11 Source 1 3 0 The Destin this application is an analog output channel cont
102. is determined by the input type data format and scaling selected 11 not used Temperature Units Selection Bit 8 Table 5 N 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 5 12 Chapter 5 Channel Configuration Data and Status Table 5 N Bit Descriptions for Temperature Units Selection Binary Value Select If you want to 0 degrees Celsius display 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 Table 5 0 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 Table 5 0 Bit Descriptions for Filter Frequency Selection Binary Value Select Description 00 10 Hz 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 50Hz 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
103. le 0 5 mA Recommended for use with higher resistance ranges for both RTDs and direct resistance inputs 1000Q RTDs and 3000Q resistance input Refer to RTD manufacturer for recommendations Cannot use for 10 Copper RTD 20 mA Must use for 10Q Copper RTD Recommended to use for all other RTD and direct resistance inputs except 1000Q RTDs and 3000Q resistance input ranges are limited Refer to RTD manufacturer for recommendations A 2 Module Accuracy RTD Temperature Ranges Resolution and Repeatability Appendix A Specifications Temp Range Temp Range i RTD type 0 5 mA Excitation 2 0 mA Excitationyo Resolution Repeatability ima 200 C to 4850 C 200 C to 150 C 01 C 02 C 328 F to 1562 F 328 F to 1562 F 02 F 04 F nS 200 C to 4850 C 200 Ct04850 C 01 C E02 C 328 F to 1562 F 328 F to 41562 F 02 F 04 F atinum 385 ana 200 C to 4850 C 200 Cw 450 C 01 C 02C 328 F to 1562 F 328 F to 1562 F 02 F 04 F ioga 200 C to B50 C 200 C to 420 C 01 C 0 2 C 328 F to 41562 F 328 F to 4464 F 02 F 04 F imo 200 Ct04630 C 200 Cto 4630 C 01 C 0 2 C 328 F to 1166 F 328 F to 1166 F 02 F E04 a 200 Ct04630 C 200 C to 630 C 01 C 02C 328 F to 41166 F 328 F to 1166 F
104. lease review the information in the Module Diagnostics and Troubleshooting chapter first Then call your local Allen Bradley representative Preface Your Questions or Comments on this Manual If you find a problem with this manual please notify us of it on the enclosed Publication Problem Report If you have any suggestions for how this manual could be made more useful to you please contact us at the address below Allen Bradley Company Inc Control and Information Group Technical Communication Dept A602V T122 P O Box 2086 Milwaukee WI 53201 2086 P 7 Description Chapter Overview This chapter describes the 4 channel 746 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 general description of the module s hardware and software features anoverview of system operation For the rest of the manual the 746 NR4 RTD Resistance Input Module will be referred to as simply the RTD module The RTD module receives and stores digitally converted analog data from RTDs or other resistance inputs such as potentiometers into its image table for retrieval by all fixed and modular SLC 500 processors An RTD consists of a temperature sensing element connected by 2 3 or 4 wires that provide input to the RTD module The module supports connections from any combination of
105. meter Connections To Terminal Block For details on wiring a potentiometer to the module see chapter 3 Cable Shield Run RTD and sense wires from module to potentiometer terminal and tie them to one point Potentiometer Shield Chl 0 RTD Chl 0 Sense Chl 0 Return 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 Potentiometer Shield Chl 0 RTD Chl 0 Sense Chl 0 Retum Belden 83503 or Belden 9533 Shielded Cable 2 5 Chapter 2 Quick Start al Procedure Configuring Your I O Reference Configure your system I O configuration for the particular slot where the RTD module resides slot 1 in ae this example Using APS software select the 1746 NR4 from the list of modules or if itis not listed Operating in your software version select Other and enter the RTD module ID code 3513 at the prompt on Considerations the 1 0 configuration display No manual entry of special I O configuration SPIO CONFIG information is required as the module ID code automatically assigns the number of input and outp
106. msec 60 Hz 100 dB 15 72 Hz 50 msec 250 Hz 65 5 Hz 12 msec Chapter 4 Preliminary Operating Considerations Effective Resolution The effective resolution for an input channel depends upon the filter frequency selected for that channel The following table displays the effective resolution for the various input types and filter frequencies Table 4 B Effective Resolution for RTD and Resistance Inputs Input T Filter Frequency n perpe 10 Hz 50 Hz 60 Hz 250 Hz 10 1 C 0 2 C 10 2 C 10 4 C 100 PERTO 305 02F G04 o4 E07 F 10 1 C 10 2 C 10 2 C 10 4 C aia PUT OBS X029 Eioaer o4 E07 eF 0 1 C 440 2 C 10 2 C 10 4 C 30063 PERTO 38310 Ei0 2 F G 04F o4 E07 eF E 10 1 C 40 2 C 10 2 C 10 4 C 1000 PERTD 3850 05 oae ao04 F e107 F 0 1 C 440 2 C 10 2 C 10 3 C 100 PERTD 3916 505 oae har e105 F 0 1 C 0 2 C 10 2 C 10 3 C 200QPtRTD 3916 05 5 oae 04 F E05 eF 10 1 C 10 2 C 10 2 C 10 3 C SO0S2PERTD 3916 bo poser Coser 05 F 0 1 C 410 2 C 10 2 C 10 3 C 1000 PERTD 3916 05 5 Lieder Goo4er E05 F 140 2 C 440 3 C 0 3 C 10 4 C 1OQCURTD 426 0 Cro CEOS 05 F 07 F 0 1 C 0 1 C 10 1 C 10 2 C DOQNIRTD 618 09
107. n about how to configure a channel examine channel input data check a channel s status The channel configuration word is a part of the RTD module s output image as shown in the figure below 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 reading in C Output words 4 7 are used to further define the channel configuration to allow you to 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 Table 5 A Programming is discussed in chapter 6 Addressing is explained in chapter 4 Figure 5 1 Module Output Image Configuration Word 0 e 0 CH 0 Configuration Word 15 O e 1 CH 1 Configuration Word 15 0 O e 2 CH 2 Configuration Word 15 0 0 e 3 CH 3 Configuration Word 15 0 O e 4 Defines user set lower scale limit for range 0 15 0 0 e 5 Defines user set upper scale limit for range 0 15 0 0 e 6 Defines user set lower scale limit for range 1 15 0 e 7 Defines user set upper scale limit for range 1 15 i Module default settings for configuration word
108. n about the data content of the configuration word 4 2 Channel Filter Frequency Selection Chapter 4 Preliminary Operating Considerations 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 2 input word 6 of the RTD module located in slot 3 in the SLC chassis use address I 3 6 lot File Type Word I 3 6 Element Delimiter Word Delimiter 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 reje
109. ndent upon the excitation current magnitude that you select when configuring the module For details on excitation current refer to A 2 A 3 Appendix A Specifications RTD Accuracy and Temperature Drift Specifications RTD Type Accuracy Accuracy Temperature Drift Temperature Drift yp 0 5 mA Excitation 2 0 mA Excitation 0 5 mA Excitation 2 0 mA Excitation 1002 1 0 C 0 5 C 0 034 C C 0 014 C C E 2 0 F 0 9 F 0 061 F F 0 025 F F 2002 10 C 0 5 C 0 034 C C 0 014 C C Plati 385 2 0 F 0 9 F 0 061 F F 0 025 F F aun SE 0 6 C 05 C 0 017 C C 0 014 C C 1 1 F 0 9 F E 0 031 F F 0 025 F F 10002 0 6 C 0 5 C 0 017 C C 0 014 C C XE LIFE 0 9 F E 0 031 F F 0 025 F F 1002 1 0 C 0 4 C 0 034 C C 0 011 C C E 2 0 F 0 7 F zE 0 061 F F 0 020 F F 2002 1 0 C 0 4 C 0 034 C C 0 011 C C Plati 39160 2 0 F 0 7 F 0 061 F F 0 020 F F atium S908 Sie 05 C 04 C 0 014 C C 0 011 C C 0 9 F 0 7 F 0 025 F F 0 020 F F 10002 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 Copper 426 10
110. ngineering 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 Table 5 C through Table 5 H The lowest possible value for an input type is Sy ow and the highest possible value is Sup 5 5 Chapter 5 Channel Configuration Data and Status 5 6 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 and 16383 Zero 0 corresponds to the lowest temperature value of the RTD type or the lowest resistance value ohms The value 16383 corresponds to the highest temperature value for that RTD or the highest resistance value ohms For example if a 100Q Platinum RTD a 0 003916 is selected then the relationship of temperature and module counts is Temperature Counts 200 C 0 630 C 16383 Figure 5 2 shows the linear relationship between output counts and temperature when one uses scaled for PID data format Figure 5 2 Linear Relationship Between Temperature and PID Counts Counts Chapter 5 Channel Configuration Data and Status 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 t
111. nnel Configuration 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 Nickel Resistance Bits 0 3 Platinum Platinum Copper lire 0 00618 Nickel Iron Input a 0 00385 a 0 003916 a 0 00426 0 00672 a 0 00518 Setting 1500 1100 Select 200Q 0001 500Q 1101 Input Type 5002 0010 10002 1110 10000 0011 3000Q 1111 Actual value at 0 C is 9 042 per SAMA standard RC21 4 1966 Q Actual value at 0 C is 100 2 per DIN standard 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 5 of the channel configuration word Important Complete step 8 if you select proportional counts data format 00 engineering units x1 0 1 step 0 1 2 step and 0 012 step 150 2 only Select M 10 Bits 4and5 Data 01 engineering units x10 1 step 12 step and 0 12 150 2 only Format 10 scaled for P ID 0 to 16383 11 proportional counts 32768 to 32767 Refer to select scaling bits 13 and 14 Appendix C NR4 Configuration Worksheet 3 Determine the desired state for the channel
112. nput Select 00 zero 01 upscale 10 downscale 11 Invalid Bit 8 Temperature Units Select 0 degrees Celsius 1 degrees Fahrenheit Bits 9 and 10 Filter Frequency Select 00 2 10Hz 01 250 Hz 10 260 Hz 11 250 Hz Bit 11 Channel Enable 0 channel disabled 1 channel enabled Bit 12 Excitation Current Select 0 2 0mA 120 5 mA 11 Notused Bits 13and 14 Scaling Select 00 module defined 01 config words 4 amp 10 config words 6 amp scaling default 5 for scaling 7 for scaling config error Bits 15 Not Used 0 always make this setting 8 2 Actual value at 0 C is 9 042 per SAMA standard RC21 4 1966 Q Actual value at 0 C is 100 2 per DIN standard Values are in 0 1 step or 0 12 step for all resistance input types except 1509 For the 150 2 resistance input type the values are in 0 01 2 step Values are in 1 step or 1 Q2 step for all resistance input types except 150 For the 150 resistance input type the values are in 0 1O step Chapter 8 Application Examples Program Listing Since a 7 segment LED display is used to display temperature Figure 8 1 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 Figure 8 3 Figure 8 3 Program to Convert F to BCD Rung 2 0 Initialize Channel 0 First Pass Bit of RTD Module S 1 MOV t MOVE 15 Source N10 0 Des
113. nput filter to provide 60 Hz line noise rejection use 2 0 mA excitation current for RTD select module defined scaling 8 5 Chapter 8 Application Examples Figure 8 5 Channel Configuration Worksheet With Settings Established 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 0 Q 1 Channel1 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 Q 1 Channel3 Chilled H20 Input Type S elect Data Format Select Broken Input Select Temperature Units Select Filter Frequency Select Channel Enable Excitation Current Select Scaling Select Not Used Bit Definitions 0000 1000 Pt 385 0110 5002 Pt 3916 1100 1500 Potentiometer 0001 200 Pt 385 0111 1000Q Pt 3916 1101 500Q Potentiometer 0010 2500 Pt 385 1000 2100 Cu 427 1110 1000 P otentiometer Bits 073 Input Type Select 0011210000 Pt 385 1001 120QNi 618 1111230000 Potentiometer 0100 1000 Pt 3916 1010 1200 Ni 617 0101 2000 Pt 3916 1011 6040 Ni Fe 518 F 00 engineering units x1 10 scaled for PID 0 to 16383 eile And S Data Format Select 01 engineering units x10 11 proportional counts 32768 to 32767 Bits 6 and 7 Broken Input
114. oad on the system power supply using the Sa icona procedure described in the SLC Installation amp Operation Manual for Modular Style Controllers Publication Number 1747 6 2 or the SLC 500 Family System Overview Publication Number 1747 2 30 E Procedure Inserting Module Reference Chapter 3 ATTENTION Never install remove or wire Installation and modules with power applied to the chassis or Wiring devices wired to the module Make sure system power is off then insert the RTD module into your 1746 chassis In this example procedure local slot 1 is selected Figure 2 1 Figure 2 1 Module Insertion Into Chassis Y Top and Bottom EN Module Release s 2 2 Chapter 2 Quick Start Pe Procedure Wiring Module Reference s Chapter 3 e Figure 2 2 or potentiometer F igure 2 3 or Figure 2 4 wire leads to channel 0 of the Installation and Wiring Figure 2 2 RTD Connections To Terminal Block For details on wiring an RTD to the module see chapter 3 2 Wire RTD Interconnection Cable Shield S ra Add J umper ania Sm Se chirm Io LM XL IL Les O N H Chl 0 Sense Terminal Pin ou
115. ontrol devices operator interfaces sensors and a variety of software Rockwell is one of the world s leading technology companies Worldwide representation ELA M Argentina e Australia e Austria e Bahrain e Belgium e Brazil e Bulgaria e Canada e Chile e China PRC e Colombia e Costa Rica e Croatia e Cyprus e Czech Republic e Denmark e Ecuador e Egypt e El Salvador e Finland e France e Germany e Greece e Guatemala e Honduras e Hong Kong e Hungary e Iceland e India e Indonesia e Ireland e Israel e Italy e Jamaica e J apan e J ordan e Korea e Kuwait e Lebanon e Malaysia e Mexico e Netherlands e New Zealand e Norway e Pakistan e Peru e Philippines e Poland e Portugal e Puerto Rico e Qatar e Romania e Russia CIS e Saudi Arabia e Singapore e Slovakia e Slovenia e South Africa Republic e Spain e Sweden e Switzerland e Taiwan e Thailand e Turkey e United Arab Emirates e United Kingdom e United States e Uruguay e Venezuela e Yugoslavia Allen Bradley Headquarters 1201 South Second Street Milwaukee WI 53204 USA Tel 1 414 382 2000 Fax 1 414 382 4444 Publication 1746 6 7 J une 1998 40072 007 01 C Supersedes Publication 1746 6 7 J anuary 1997 Copyright 1998 Rockwell International Corporation All rights reserved Printed in USA
116. or scaling EN Bits 15 Not Used 0 always make this setting c 4 Actual value at 0 C is 9 042Q per SAMA standard RC21 4 1966 Q Actual value at 0 C is 100 2 per DIN standard G Values are expressed in 0 1 degree step or 0 192 step applies to all pots except 150Q type For the 1502 pot input type the values are expressed in 0 019 step Values are expressed in 1 degree step or 1 O step applies to all pot except 1502 type For the 1502 potinput type the values are expressed in 0 192 step Index RTD resistance Input Module User Manual A A D P 4 abbreviations P 4 addressing 4 2 configuration word 4 2 addressing example 4 2 data word 4 3 addressing example 4 3 Status word 4 3 addressing example 4 3 alarms 6 10 6 11 Allen Bradley P 7 contacting for assistance P 7 application examples 8 1 attenuation P 4 autocalibration 6 11 how to invoke 6 11 when to use it 6 11 bitallocation 5 4 in configuration word 5 4 in status word 5 20 broken circuit defining conditional state of channel data downscale enable 5 12 upscale enable 5 12 zero 5 12 broken input bit description in configuration word 5 12 bit description in status word 5 21 broken input error bit description in status word 5 22 C cable specifications A 5 cable tie slots 1 6 calibration 3 13 auto cal 3 13 4 9 factory cal 3 13 single point cal 3 14 CE Certification 3 1 channel calibr
117. or the RTDs Table 1 A RTD Temperature Ranges Resolution and Repeatability Temp Range Temp Range i RTD Type 0 5 mA Excitation 2 0 mA Excitation Resolution Repeatability 1000 200 C to 850 C 200 C to 850 C 0 1 C 0 2 C 328 F to 1562 F 328 F to 1562 F 0 2 F 0 4 F 2002 200 C to 850 C 200 C to 850 C 0 1 C 0 2 C bist im 328 F to 1562 F 328 F to 1562 F 0 2 F 0 4 F PANEN aE sia 200 C to 850 C 200 C to 850 C 0 1 C 0 2 C 328 F to 1562 F 328 F to 1562 F 0 2 F 0 4 F 10002 200 C to 850 C 200 C to 240 C 0 1 C 0 2 C 328 F to 1562 F 328 F to 464 F 0 2 F 0 4 F 1002 200 C to 630 C 200 C to 630 C 0 1 C 0 2 C 328 F to 1166 F 328 F to 1166 F 0 2 F 0 4 F 2002 200 C to 630 C 200 C to 630 C 0 1 C 0 2 C bist dde 328 F to 1166 F 328 F to 1166 F 0 2 F 0 4 F annurate m 200 C to 4630 C 200 C to 630 C 01 C 02 C 328 F to 1166 F 328 F to 1166 F 0 2 F 0 4 F 10002 200 C to 630 C 200 C to 230 C 0 1 C E 0 2 C 328 F to 1166 F 328 F to 446 F 0 2 F 0 4 F 100 C to 260 C 0 1 C E 0 2 C Copper 426 O 102 Not allowed 148 F to 4500 F 0 2 F 3 04 9F l
118. ord the LED states also note input and output image words for the RTD module a list of things you have already tried to remedy the problem processor type 1746 NR4 series letter and firmware FRN number See label on left side of processor hardware types in the system including I O modules and chassis fault code if the SLC processor is faulted Basic Example SLC 5 04 Chapter Application Examples This chapter provides two application examples to help you use the RTD input module They are defined as a basic example 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 worksheet in Figure 8 2 Figure 8 1 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 Figure 8 1 Device Configuration 1746 0B16 1746 NR4 i 200 Q Platinum RTD oooo
119. proceeding to the next highest numbered channel for example channel 0 channel 1 channel 2 channel 3 channel 0 channel 1 etc Channel scan time is a function of the filter frequency as shown in the following table Table 4 D Channel Scan Time Filter Frequency Channel Scan Time 10 Hz 305 ms 50 Hz 65 ms 60 Hz 55 ms 250 Hz 17 ms 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 4 9 Chapter 4 Preliminary Operating Considerations The fastest module update time occurs when only one channel with a 250 Hz filter frequency is enabled Module Update Time 17 ms NOTE With 3 channels enabled the module update time is 3 channels x 17 ms channel 51 ms The slowest module update time occurs when four channels each using a 10 Hz filter frequency are enabled Module Update Time 4 x 305 ms 1220 ms Figure 4 6 Scanning Cycle Channel 1 Channel 0 Start Update Channel 1 Data Word Calculate CUTS 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 amp 1 Enabled Only 4 10 Channel Turn On
120. put signal range is proportional to your selected input type and scaled into a 32768 to 32767 range default or user set range based on the scaling select bits 13 and 14 and scale limit words 0 e 4 0 e 5 or 0 e 6 0 e 7 00 engineering units x 1 10 scaled for P ID 11 proportional counts 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 1Q 1Q Scaled for PID and Proportional Counts The first six options represent 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 and 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 pages 5 6 scaled for PID data format and 5 7 proportional counts data format For a description of user set scaling using proportional counts data format see page 5 15 The equations on page 5 8 show how to convert from Scaled for PID to Engineering Units Engineering Units to Scaled for PID Proportional Counts to E
121. rolling the speed of the conveyor motor drive The Rate 10000 Rate and Offset parameters should be set per your Scenes application Refer to the SLC 500 and MicroLogix 1000 Instruction Set Reference Manual P ublication 1747 6 15 Dest or the Analog I O User Manual Publication 1746 6 4 for specific examples of the SCL instruction Rung 2 2 Data Table address 15 data 0 address 15 data 0 N10 0 0010 1000 0011 1110 N10 3 0000 0000 0000 0000 N10 1 0000 0000 0000 0000 N10 4 0000 0000 0000 0011 3 ft min N10 2 0000 0000 0000 0000 N10 5 0000 0000 0011 0010 50 ft min 6 9 Chapter 6 Ladder Programming Examples Monitoring Channel Status Bits 6 10 address N10 0 N10 1 N10 2 Figure 6 9 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 Figure 6 9 Programming to Monitor Channel Status Rung 2 0 First Pass Bit Initialize RTD module s 1 COR t COPY FILE 15 Source N10 0 Dest 0 3 0 Length 4 Rung 2 1 Channel 0 Channel 0 Channel 0 Status Open or Short Alarm I 3 4 I 3 4 0 2 0 f 1E
122. rtional counts mode 0 1 3 Word 3 Channel 3 Configuration Word 4 Limit Scale Words are only used if scaling select 201 or 0 14 Word4 User set Lower Scale Limit Range 0 ioa 10 and data format 2 11 0 1 5 Word 5 User set Upper Scale Limit Range 0 n 0 1 6 Word6 User set Lower Scale Limit Range 1 a EE Word 7 User set Upper Scale Limit Range 1 sd i Default Settings 0 1 7 Wor e i 19 100 Q Platinum RTD 385 Engineering Units x 1 0 1 step 49 Broken Input set data word to zero 1 Degrees Celsius C 9 10 Hz Filter Frequency If proportional counts data format is used then output words 4 7 19 Channel Disabled can be used to define a user set scaling range for each channel ie 2 0 mA Excitation Current Module Defined Scaling Bit 15 i Bit 0 0 0 0 0J 1 0 0 0J O 0 0 0 0 00 0 New Setting Set this bit 11 to enable channel Address 0 1 0 11 2 7 Chapter 2 Quick Start Procedure Programming the Configuration Reference Do the programming necessary to establish the new configuration word setting in the previous step Chapter 6 1 Using the memory map function create integer file N10 Integer file N10 should contain one Ladder element for each channel used Forthis example we only need one N10 0 Programming 2 Using the APS enter the configuration parameters from step 6 for channel 0 into integer Examples N10 0 In this
123. ry code in bit field 6 7 Broken Input Selection of the channel configuration word 4 If the channel is configured for RTD inputs and engineering units data format determine if you want the channel data word to read in degrees Fahrenheit or degrees Celsius 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 5 Determine the desired input filter frequency for the channel and enter the 2 digit binary code in bit field 9 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 6 Determine which channels are used in your program and enable them Place a one in bit 11 channel Enable if the channel is to be used Place a zero in bit 11 if the channel will not be used 7 Select the excitation current for the input channel A zero in bit 12 provides an excitation current of 2 0 mA a 1 provides 0 5 mA Select the excitation current value based on RTD vendor recommendations and the Input Specifications table page A 2 8 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 s
124. s 0 7 are all zeros Scaling defaults are explained on page 5 14 under the explanation for the User set Scaling Select bits 13 and 14 Chapter 5 Channel Configuration Data and Status Channel Configuration The channel configuration word consists of bit fields the settings of which Procedure determine how the channel operates This procedure looks at each bit field separately and helps you configure a channel for operation Refer to Table 5 A and the bit field descriptions that follow for complete configuration information Page C 4 contains a configuration worksheet that can assist your channel configuration Configure Each Channel 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 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 will be expressed in the data word Enter your 2 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 An example on page 5 15 user set scaling explains how to do this 3 Determine the desired state for the channel data word if a broken input condition is detected for that channel open circuit or short circuit Enter the 2 digit bina
125. ser Manual A reference manual that contains status file data instruction set and SLC 500 and MicroLogix 1000 Instruction Set 1747 6 15 troubleshooting information about AP S Reference Manual f An introduction to APS for first time users containing basic concepts but focusing on simple tasks and exercises and allowing the reader to begin APS Quick Start for New Users 9399 APSQS programming in the shortest time possible A procedural and reference manual for technical personnel who use an Allen Bradley Hand Held Terminal User s Manual 1747 NP002 HHT to develop control applications An introduction to HHT for first time users containing basic concepts but focusing on simple tasks and exercises and allowing the reader to begin Getting Started Guide for HHT 1747 NM009 programming in the shortest time possible A resource manual and user s guide containing information about the i T analog modules used in your SLC 500 system SLC 500 Analog I O Modules User s Manual 1746 6 4 In depth information on grounding and wiring Allen Bradley Allen Bradley Programmable Controller Grounding and 1770 41 programmable controllers Wiring Guidelines i A description of important differences between solid state programmable att Mara T controller products and hard wired electromechanical devices Application Considerations for Solid State Controls sGI 11 A complete listing of current AllenBradley documentation including ordering instructions Also
126. shown in Figure 6 4 All elements are copied from the specified source file to the destination during the first scan following power up Figure 6 4 File Copy Instruction First Pass Bit Initialize RTD module S 1 COP On power up bit 1 15 is set for the first program scan and COPY FILE integer file N10 is sent to the RTD module channel 15 Source N10 0 configuration word Dest 0 3 0 Length 4 6 3 Chapter 6 Ladder Programming Examples Dynamic Programming Figure 6 5 explains how to change data in the channel configuration word when the channel is currently enabled Example 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 Procedure 1 Using the memory map function create a new element in integer file N10 Integer file N10 already contains four elements N10 0 through N10 3 You will now add a fifth element N10 4 2 Using APS data monitor function enter the same configuration data as in the previous example except for bit 8 Bit 8 is now set for a logic 0 C Figure 6 5 Program To Change Configuration Word Data Rung 2 0 Set up all four channels 8 1 ERE E COPY FILE 15 Source N10 0 Dest 0 3 0 Length 4 Rung 2 1 Set channel 2 to display in C MOV I 1 0 B3 MOVE E OSR Source N10 4 0 0 Dest 0 3
127. ssed in dB CMRR 20 Logi v1 v2 common mode voltage A voltage signal induced in conductors with respect to ground 0 potential configuration word Contains the channel configuration information needed by the module to configure and operate each channel Information is written to the configuration word through the logic supplied in your ladder program cut off frequency The frequency at which the input signal is attenuated 3dB by the digital filter Frequency components of the input signal below the cut off frequency are passed with under 3dB 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 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 Preface
128. st 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 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 detectable change in a measurement typically expressed in engineering units e g 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 Preface Common Techniques Used in this Manual Allen Bradley Support P 6 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
129. t 0 3 0 Rung 2 1 Convertthe 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 13 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 OF FF 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 JEND Data Table address 15 data 0 address 15 data 0 N10 0 0000 1001 0001 0001 8 3 Chapier 8 Application Examples Supplementary Example Application Setup Four Channels C x F Figure 8 4 shows how to display the temperature of several different RTDs 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 Figure 8 4 Device Configuration for Displaying Many RTD Outputs 1746 NR4 1746 IB8 4 1746 0B16 SLC 5 04 Pa ON A Ambient Temperature 604 Q Nickel Iron 518 O dl O Y Display Panel QO Ambient Bath Steam Chilled H20 Chilled H20 Pipe In
130. t Detection cece cece eee Cure OR ange Detection s eic asc ike dace xe i Ruso gs Module Status LED Green irusancu ere xh RIT RETE aa ee ES e n Replacement PariS ask siac0tlad coda aad de niea Mansi Saag bee ed eae Contacting Allen Bradley i123 uas uk eek w unu vee velue da EY ae ea Bee Chapter 36 Basic EXSIDIE cxctevenedit Seiad hed eaeyds Lene adetu denne das vee iii Table of Contents RTD Resistance Input Module User Manual Specifications RTD Standards Configuration Worksheet for RTD Resistance Module Channel Configuration usu dc m ER Xa E RR XY ERR AAT 8 1 Program LISUng cra saraca ix ra s Race dcum wld bade da ad wale Peale ae 8 3 IE RERUM 8 3 S pplementary EXamMple 2 vues ose dudo doe Sed dco dioe 8 4 Channel Configuration ss zoo deg n odo a OR abl OR Qo RE Sor cs o donor 8 5 Program Setup and Operation Summary ccc eee ences 8 7 Programi LSIN co dated En erae Hane e hr Retard dea ecu d d a na did 8 8 Dad Tapie uu paesndehe cada bs vade ads Tene dead a8 meena 8 9 Appendix A Electrical Specifications uasa dice awa s d acdes 9 Sewers 4 aerae s ana A 1 Physical Specifications o cio ear dE 48 acr 6b Ree RR RU Qr adig canes A 1 Module Environmental Specifications 0 ccc cece eee eee eens A 2 Input Specifications 2 cece cece eee eee Hmmm A 2 Module Accuracy ou lee set equ d ai dauteltu og dora acuti epe qe ks A 3 Resistance Device Compatibility 0 0 0 0 eee eee A 5 Cable Sp
131. ta isses nnn 5 3 Input Type Selection Bits 0 3 sess 5 5 Data Format Selection Bits 4 and 5 aaa 5 5 Using Scaled For PID and Proportional Counts Formats 5 5 Scaling Examples css cccivae seit RR RR EEVRREYA E RARE Y 5 8 Scaled for PID to Engineering Units ccc cece eee ees 5 8 Engineering Units to Scaled for PID cece cee eee eens 5 8 Proportional Counts to Engineering Units e eee 5 8 Engineering Units to Proportional Counts 00 eee aes 5 8 Broken Input Selection Bits 6 and 7 eee eee ees 5 12 Temperature Units Selection Bit8 isses 5 12 Filter Frequency Selection Bits 9 and 10 000 5 13 Channel Enable Selection Bitll 0c cee e ee eee 5 13 Excitation Current Selection Bit12 0c eee eee eee 5 14 Scaling Select Bits 13 14 i e eter nnn 5 14 cUm RR eegeeeskedasae Keg eeay ee 5 15 Ladder Programming Examples Module Diagnostics and Troubleshooting Application Examples Table of Contents RTD Resistance Input Module User Manual User Set Scalig iius uk RR RR x RRERERVRRENARRERR RAS Configuration Words For User set Scaling Words 4to 7 Unused BIE IB 122 saacsx mer X ddr RA ERCORA aw MIR RR Channel Data Word uu au dcus Fac noc dde d tee seed Channel canis Checking dq xr eo od FR OR eee eee ICE do cea Input Type S tatus BIS U 3 uacua desees ta ics ae abe Pos P dae 4 Data
132. tep 0 0220 C step 0 0396 F step 0 0051 C step 0 0099 F step 120 Q Nickel 618 0 1 C step O l 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 O l 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 l 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 Actual value at 0 C is 100Q per DIN standard Table 5 K Table 5 K and Table 5 L shows the data resolution provided by the Channel Data Word Resolution for 1500 Resistance Input 1746 NRA for resistance input types using the various data formats Resistance Input Type 1500 Data Format Bits 4 and 5 Pe Proportional Counts Engineering Units x 1 Engineering Units x 10 Scaled for PID Default Ohms Ohms Ohms Ohms 0 010 step 0 1 Q step 0 00920 step 0 00230 step 5 11 Chapter 5 Channel Configuration Data and Status rebels Word Resolution for 5009 1000 2 and 3000 2 Resistance Inputs Data Format Bits 4 and 5 Resistance Input Type Engineering Units x 1 Engineering Units x 10 Scaled for PID Miis o a Ohms Ohms Ohms Ohms 500
133. 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 enter the module ID code address your RTD module select the proper input filter for each channel calculate the RTD module update time 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 With APS version 5 0 or later select the 1746 NR4 RTD module from the list of modules on the system I O configuration display to automatically enter the ID code With earlier versions of APS version 1 04 through 4 02 01 you must manually enter the module identification code when configuring the slot To manually enter the module ID code select other from the list of modules on the system I O configuration display The module ID code for the RTD module is shown below Catalog Number ID Code 1746 NR4 3513 No special I O configuration SPIO CONFIG information is required The module ID code automatically assigns the correct number of input and output words 4 1 Chapter 4 Preliminary Operating Considerations Module Addressing The memory map shown in Figure 4 1 displays how the output and input ima
134. tion 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 for the following reasons Open circuit excitation current is less than 50 of the selected current Short circuit calculated lead wire compensated RTD resistance is less than 3 ohms 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 Chapter 5 Channel Configuration Data and Status 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
135. to these modules if your application uses the BAS or KE module in this way 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 away from power lines load lines and other sources of electrical noise such as hard contact switches relays and AC motor drives away from modules which generate significant radiated heat such as the 32 point I O modules Chapter 3 Installation and Wiring Module Installation and Removal 3 4 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 as shown below to identify the module location and type SLOT RACK ____ MODULE Removing the Terminal Block ATTENTION Never install remove or wire modules 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 Figure 3 1
136. trol a process Preface Contents of this Manual Chapter Title Preface Contents 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 Overview Provides a hardware and system overview Explains and illustrates the theory behind the RTD input module Quick Start Guide Provides a general procedural roadmap to help you get started using the RTD module Installation and Wiring Provides installation procedures and wiring guidelines Preliminary Operating Considerations Gives you the background information you need to understand how to address and configure the module for optimum operation as well as how to make changes once the module is in a run state Channel Configuration Data and Status Examines the channel configuration word and the channel status word bit by bit and explains how the module uses configuration data and generates status during operation Ladder Programming Examples Gives an example of the ladder logic required to define the channel for operation Also includes representative examples for unique programming requirements such as PID Module Diagnostics and Troubleshooting Explains how to interpret and correct problems with your RTD module Application Examples Examines both basic and supplementary applications and
137. ts Chl 0 Return Retum oP asc O Return 7 Belden 9501 Shielded Cable sud em Shield Chl 0 l RTD ChI 3 Wire RTD Interconnection Cable Shield Chilo RTD Sense Chil on E Chl0 Sense Shield GI Retum Cpi 1 Shield Return Chl 0 RTD C9 ie eh chi2 Chl 0 Sense C9 G R 2 qi hl 2 T Chl 0 Return Return HA n x Belden 83503 or Belden 9533 Shielded Cable Chl2 Sense Return Chl 3 Shield Retum 4 Wire RTD Interconnection Cable Shield Shield G We Shield Ct oS Chl 0 Sense QO OOOO Chi 0 Return ol Retun V Ls Belden 83503 or Belden 9533 Shielded Cable O Leave One Sensor Wire did Chapter 2 Quick Start Figure 2 3 2 Wire Potentiometer Connections To Terminal Block For details on wiring a potentiometer to the module see chapter 3 Cable Shield Add J umper Pd Potentiometer ET Shield N Nw ChlO RTD N Chl 0 Sense Return Chl 0 Return 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 Add J umper Shield Chl 0 RTD Potentiometer Chl 0 Sense Return Chl 0 Return Belden 9501 Shielded Cable 2 4 Chapter 2 Quick Start Figure 2 4 3 Wire Potentio
138. ugees adaad TERENA es 3 13 Factory Calibrat N ucosuexioe dato dE eor cop aes dr ee 3 13 Autocalibration oc rama sirna a May ceoweesoeacegn ber Gams 3 13 SING Pob C alib SUD us ss ienas eade eol oce EXER dw Y cerno 3 14 Chapter 32 Module ID Code i ouadoepusizatnEmiRakuhkrkab Re E dA ek a dug 4 1 Module AOdISSSIn os ducbu eed PY dene ee pd ee woe daw sepes ade 4 2 Output Image Configuration Words cece eee eee 4 2 Input Image Data Words and Status Words 0008 4 3 Channel Filter Frequency Selection cece eee eee eee teens 4 3 Channel Step Response 0 eee cece teens 4 4 Effective Resolution toc degerdedetecedadesseGeay gae sane bs 4 5 Channel Cut Off Frequency 0 02 cece cee eee 8e 4 5 Scanning Process and Channel Timing ccc ccc e eee eee eee ees 4 9 Channel Autocalibration i4 ieese rra RR RR RR RR ARR Ya dee 4 9 Update Time and Scanning Process 0 cece eee eee 4 9 Channel Turn On Turn Off and Reconfiguration Times 00 4 11 Response to Slot Disabling 45 9 8 3 bx Ua UR RC CEROROR Roc dE E RP a ER 6o 4 11 INOUE GSDOIISB ou usaba pb debe uoo be de ua MUR Cc e GC Aires 4 11 D UTDUC POS DOTISB uae died caca n eo an uie ba Dm Ga Gale de 4 11 Chapter 33 Channel Configuration 2 5 Du cuta ae td SS eh ED PU DR Rn a oi n 5 1 Channel Configuration Procedure uuna 5 2 Configure Each Channel a cssiseuee kd Pike Ru Een db an ds 5 2 Enter the Configuration Da
139. ume that the module was calibrated within the specified temperature range of 0 C to 60 C 32 F to 140 F Cable Specifications Description Belden 9501 Belden 9533 Belden 83503 For 3 wire RTDs and For 3 wire RTDs and When used For 2 wire RTDs and potentiometers Short runs less potentiometers Long runs greater i potentiometers than 100 feet and normal humidity than 100 feet or high humidity levels levels Conductors 2 24 AWG tinned copper 7x 32 3 24 AWG tinned copper 7x 32 3 24 AWG tinned copper 7x 32 Shield Beldfoil aluminum polyester shield Beldfoil aluminum polyester shield Beldfoil aluminum polyester shield with copper drain wire with copper drain wire with tinned braid shield Insulation PVC S R PVC Teflon J acket Chrome PVC Chrome PVC Red teflon Agency Approvals NEC Type CM NEC Type CM NEC Art 800 Type CMP Temperature Rating 80 C 80 C 200 C A 5 Appendix RTD Standards The following table shows various international and local RTD standards that apply to the 1746 NR4 RTD Type o IECO DING D100 SAMAG JIS old JIS new Minco 100 Q Platinum 0 00385 X X X 200 Q Platinum 0 00385 X X X 500 Q Platinum 0 00385 X X X 1000 Q Platinum 0 00385 X X X 100 Q Platinum 0 03916 X X 200 Q Platinum 0 03916 X X 500 Q Platinum 0 03916 X X 1000 Q Platinum 0 03916 X X 10 Q Copper 0 00
140. ut words required by the module Additional information about how to configure your system can be found in the APS Quick Start for New Users Publication 9399 APSQS Example of Software Prompt Press ENTER to select I O Module Enter Module ID Code gt 3513 offline SLC 5 02 File EXAMPLE SELECT MODULE F2 2 6 Chapter 2 Quick Start nm Procedure Configuring the Module Reference Determine the operating parameters for channel 0 In this example Figure 2 5 shows the channel 0 Chapter 4 configuration word defined with all defaults 0 except for channel enable bit 11 The addressing Preliminary reflects the location of the module as slot 1 For details on how to configure the module for your Operating application refer to chapters 4 and 5 Considerations A configuration worksheet is included on page C 4 to assist you in channel configuration Chapter 5 Channel Configuration Data and Status Figure 2 5 Output Image Detail Hl ys SLC 500 Controller 7 gial E d Data Files how E g t3 8 y 0 m Input Image Output Image F g B E g 8 words A Pf E i E P ki E El m E E Address man aa eal 0 1 0 Word 0 Channel 0 Configuration Word j LO 0 0 0 0j 0 0 0j 0 0 0 0j 0j 0 0 0 Q L1 Word1 Channel 1 Configuration Word Bit15 Bit 0 0 12 Word2 Channel eco Word Scaling Select bits apply to propo
141. wing directives EMC Directive This product is tested to meet Council Directive 89 336 EEC Electromagnetic Compatibility EMC and the following standards in whole or in part documented in a technical construction file e EN 50081 2 EMC Generic Emission Standard Part 2 Industrial Environment e EN 500822 EMC Generic Immunity Standard Part 2 Industrial Environment This product is intended for use in an industrial environment Chapter 3 Installation and Wiring Electrostatic Damage NR4 Power Requirements 3 2 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 ATTENTION 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 Touch a grounded object to rid yourself of electrostatic charge before handling the module Handle the module from the front away from the backplane connector Do not touch backplane connector pins Keep the module in its static shield bag when not in use or during shipment The RTD module receives its power through the SLC500 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

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