2559-RTD 8-Channel RTD Input Module
Contents
1. e S SS SSSSSS connector Channel 2 Channel 4 Precision resistors installed Figure 2 6 Calibration Connector Wiring Diagram The following steps are needed to ensure proper calibration of the module Nam Remove power from the 505 rack that contains module Remove the field wiring connector from the RTD module Remove the module from the rack Set dipswitch 8 SW2 to the Cal 0 position Install the precision resistors per Figure 2 6 Reinsert the module into the rack Apply power to the rack The module LED will begin to blink slowly and after around 3 minutes the LED will begin to blink rapidly to indicate completion of the calibration 2559 RTD Installation and Operation Guide Work through the above steps in a backward progression to return the module to operation 15 2 7 4 Calibration Process During the calibration process the front panel LED will blink at a rate indicating the Calibration Phase 0 25 Hz Phase 1 Acquiring 2000 Ohm data 0 5 Hz Phase 2 Acquiring 0 Ohm data for 200 500 Ohm Range 1 Hz Phase 3 Acquiring 402 Ohm data 2 Hz Phase 4 Acquiring 20 Ohm data 4 Hz Phase 5 Acquiring 4020 Ohm data Solid Calibration complete set Run Calibrate switch to Run and restart module END The calibration process is terminated in one of three ways 1 successful completion leaves the2. Figure 1 3 Digital Representation of Input Temperature Change 1 7 2 Scaled Integer Data When the data format is selected as Integer the full temperature range of the RTD is scaled as an unsigned integer from 0 to 32000 The following formulas may be used to calculate the scaled integer value for temperature Temperature Scaled Integer measured temp min temp max temp min temp x 32000 ex the scaled integer offset at 0 C for a 1000 Pt RTD is Scaled integer 0 199 8 849 199 8 x 32000 6091 4 CTI 2559 RTD Installation and Operation Guide 1 8 Module Addressing The 2559 RTD module can be configured as an 8 WX or 16 WX word module This is selectable using dipswitch 2 on switch block 2 Table 1 3 lists the WX configurations for the 2559 RTD module In 16 WX mode errors are reported in Words 9 16 for inputs 1 8 Format Inputs VO Values WX16 8 WX 1 8 Input Points 1 8 WX 9 16 Separate Error Words WXS8 8 WX 1 8 Input Points 1 8 upscale errors Table 1 3 Module Addressing Configurations 1 9 Error Reporting If the module is set for 8WX and an error occurs the input data are replaced by an error word and that input ceases updating You must correct the error condition before the input resumes updating If the module is set for 16WX word inputs and an error occurs the last valid data are frozen An error word is reported in one of the last eight inputs as shown in Ta
3. Check dipswitches Check wiring sensor Input overrange Not Used RTD input is above expected range Check dipswitches Check wiring sensor Sense short Short from Sense to Return 3 wire Check wiring sensor Input not wired Source open All three inputs are open or improperly wired Source Sense and Sense Source to Return gt 20K Q Wire module channel Check Source wire Not used Not used Source to Return overrange gt 20K Q from Source to Return Check wiring sensor Not used Not used Not used Not used Invalid RTD Type selected Invalid selection of RTD material TCR and Q combination Select Valid RTD Type Not used Three Two wire 3 0003 MER Module is correctly performing 3 2 wire conversions for this input separate error words only Module channel functioning properly CTI 2559 RTD Installation and Operation Guide 19 Signed Table 3 2 Problem Codes and Messages Reported in Four Wire Mode Hex Integer Code Problem Description Corrective Action 32767 TFFF Not used Check dipswitches 32766 7FFE Input underrange RTD input is below expected range Check wiring sensor y Check dipswitches 32765 7FFD Input overrange RTD input is above expected range Check wiring sensor 32764 Not used 32763 Sense s
4. 1 1 2 Asynchronous eene nennt enne trennen entrent nn enr nente iren rene rre nnne 2 1 3 Immediate zc aoa auto OX UP e entiende ue Ge one ate ced 3 1 4 Supported RTD Probes a ete 228 ea ee dett Da dub 3 1 41 RTD Probe Type TR REGE eee RR SA UR Re RN TRIS a E OE 3 14 2 RTD Ohm Values 5 2 o 2 2 A d eon dae 3 1 4 3 2 Wire 3 W ire A Wirei 2 22 22 28 erre erase ree 3 1 5 Direct Resistive Device Input eR 3 1 6 Digital Word rn bise ostende aat es pat et pen 4 1 7 RED to Digital Conversii ee 4 1 7 1 Engineering Unit iuste rte de de ee cae e ee E 4 1 7 2 Staled Integer Data ierant ln e ee Re Ie RT ee e Eds 4 EOE K at AE E EE T E A E 5 9 Reporting ode E E E EE 5 CHAPTER 2 INSTALLATION Eri sense ti ep 6 2 1 Planning the Installati nc dio PO er ute e teu tei ut a a cos 6 2 1 1 Calculate the I O Base Power Budjget sse eene enne 6 2 1 2 zInput Signal Waring oe ange ERE ERR RANT feinsten 6 2 1 3 Selecting inse nee ee RE e ELO 7 2 13 T Eour wire o uie qo ep om e dashes Re p AR Er RE TR 7 2132 Three wire RDSI AE RU br iet eats 7 E 7 2 2 Unpacking weg eR Es in 7 2 3 Configuring Module neuem e Ue 8 2 3 1 Selecting the
5. or design in the pursuit of providing the best possible Product CTI assumes no responsibility for indirect or consequential damages resulting from the use or application of this equipment THE WARRANTY SET FORTH ABOVE IN THIS ARTICLE IS THE ONLY WARRANTY CTI GRANTS AND IT IS IN LIEU OF ANY OTHER IMPLIED OR EXPRESSED GUARANTY OR WARRANTY ON CTI PRODUCTS INCLUDING WITHOUT LIMITATION ANY WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE AND IS IN LIEU OF ALL OBLIGATIONS OR LIABILITY OF CTI FOR DAMAGES IN CONNECTION WITH LOSS DELIVERY USE OR PERFORMANCE OF CTI PRODUCTS OR INTERRUPTION OF BUSINESS LOSS OF USE REVENUE OR PROFIT IN NO EVENT WILL CTI BE LIABLE FOR SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS SO THE ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH MAY VARY FROM STATE TO STATE Chart used with permission from Omega Engineering Inc CTI 2559 RTD Installation and Operation Guide 27 REPAIR POLICY In the event that the Product should fail during or after the warranty period a Return Material Authorization RMA number can be requested orally or in writing from CTI main offices Whether this equipment is in or out of warranty a Purchase Order number provided to CTI when requesting the RMA number will
6. ALL SHIELD WIRES POINT N Star Washer Ground Lugs Screw c EARTH GROUND Figure 2 4 Terminating the Wire Shielding CTI 2559 RTD Installation and Operation Guide 13 2 6 Installing the Screw Terminal Connector When all the input signal wires are connected to the screw terminal connector carefully install the connector on the front of the module see Figure 2 5 PRINTED CIRCUIT CARD CAPTIVE SCREWS S 0303 03 03 0303 0305 0303 03 03 C3 03 03 03 TUM E 2 o z 3 T gt m o z z m 2 INDIVIDUAL CAPTIVE SCREW CS INPUT SIGNAL WIRES gt Figure 2 5 Input Connector Assembly 2 7 Calibrating the Module The 2559 RTD is calibrated at the factory and needs no calibration when installed The module should be calibrated yearly for best accuracy If the module operates in an environment where the ambient temperature cycles outside the range of 20 C to 30 C more frequent calibration may be required Also if the ambient temperature is constantly outside the range of 20 C to 30 C calibration at the ambient temperature may Improve accuracy NOTE The 2559 RTD Input Module is calibrated at the factory for initial installation Further calibration may be required depending on the environment in which the module and or the RTD operates 2 7 1 Calibration Requirements Calibra
7. Input Resistance ii e eed ete e eie 9 2 32 Selecting R PD Probe Type i de ie et o tee iu E e a e e UO 9 2 3 3 Selecting the WX Word Input 9 2 3 4 Selecting Lead Resistance Compensation 10 2 35 Selecting the Error rt e a o e Reve trees 10 2 3 6 Selecting Digital eee test eder ere ede Teens 10 2 3 7 Selecting Run or Calibration Mode sse eene ener 10 2 4 Inserting the Module into Base eene enne entren nennen nenne 10 2 5 Wiring the Input Connectot us sone 20 aan IE RE 10 2 5 1 Connecting RTD Input Wiring eee eti eee e lt e d ee odere ie 11 2 5 2 Terminating the Wire Shielding 13 2 6 Installing the Screw Terminal 14 CTI 2559 RTD Installation and Operation Guide ix 2 7 Calibrating the Module 15 2 7 1 Calibration Requirements au eet ec sa RER BR 15 2 7 2 Calibration Connector Wiring Instructions nennen 15 2 73 Calibration ii are Rn AR 15 2 7 A Calibration Process eee eet e eie UG eee e EH Enn 16 2 7 5 Calibration Troubleshooting oooonconnonnconoonnoonconoconccnnconnconnon nooo 16 2 8 Checking Module Operation nro n rro nr 16 C
8. aid in expediting the repair process The RMA number that is issued and your Purchase Order number should be referenced on the returning equipment s shipping documentation Additionally if the product is under warranty proof of purchase date and serial number must accompany the returned equipment The current repair and or exchange rates can be obtained by contacting CTI s main office at 1 800 537 8398 When returning any module to CTI follow proper static control precautions Keep the module away from polyethylene products polystyrene products and all other static producing materials Packing the module in its original conductive bag is the preferred way to control static problems during shipment Failure to observe static control precautions may void the warranty For additional information on static control precautions contact CTI s office at 1 800 537 8398 28 CTI 2559 RTD Installation and Operation Guide
9. esses eene 3 Table 1 3 Module Addressing Configurations en en es 5 Table 2 Dipswitch Assignmelits e EA E AE E E 8 Table 2 2 Precision Resistor Values for Calibration 14 Table 3 1 Problem Codes and Messages Reported for 3 Wire Mode 19 Table 3 2 Problem Codes and Messages Reported for 4 Wire Mode 20 CTI 2559 RTD Installation and Operation Guide xi CHAPTER 1 OVERVIEW 1 0 Product Summary The CTI 2559 RTD Eight Channel RTD Module is a member of Control Technology s family of I O modules compatible with the SIMATIC 505 programmable controllers It is single wide module that is compatible with two three and four wire RTDs with automatic lead wire resistance compensation for three wire and four wire RTDs The 2559 RTD pulses a small amount of current through the RTD The module measures the voltage generated by the current through the RTD and determines the resistance Lookup tables relating temperature to resistance for different RTD probes are used to determine the temperature 1 1 Front Panel Description Figure 1 1 CTI 2559 RTD Front Panel The Active LED will be illuminated when the module is functioning normally Ifthe Active LED is not lit or if it is blinking the module is not working properly Refer to Chapter 3 for troubleshooting 1 2 Asynchronous Operation The module operates asynchronously with respect to the PLC a scan of the PLC and inp
10. to 2 wire connection figure caption CTI 2559 RTD Installation and Operation Guide lil PREFACE This Installation and Operation Guide provides installation and operation instructions for the CTI 2559 RTD Eight Point Resistance Temperature Detector RTD Input Model for SIMATIC 505 programmable controllers We assume you are familiar with the operation of SIMATICO 505 series programmable controllers Refer to the appropriate SIMATIC 505 user documentation for specific information on the SIMATIC 505 programmable controllers and I O modules This Installation and Operation Guide is organized as follows Chapter 1 provides an overview of module Chapter 2 covers installation and wiring Chapter 3 is a guide to troubleshooting The Model 2559 RTD 8 Pt RTD Module CTI 2559 RTD Installation and Operation Guide USAGE CONVENTIONS NOTE Notes alert the user to special features or procedures CAUTION Cautions alert the user to procedures that could damage equipment WARNING Warnings alert the user to procedures that could damage equipment and endanger the user CTI 2559 RTD Installation and Operation Guide vii TABLE OF CONTENTS PREFACE V USAGE CONVENTIONS rete voee peto ie oet noe Roe ue o hu nete e ae gae e aad eu ae eu ve Ro enean TABLE OF CONTENT Ur IX EA NN XI CHAPTER 1 OVERVIEW 1 1 0 Product Summary 1 1 1 Front Panel Description e ete e ne
11. Active LED SOLID ON Power off the base remove the module Return dipswitch 8 on SW 2 to the Run position reinstall the module and power up the base 2 An EEPROM write failure leaves the Active LED SOLID OFF 3 Any out of range condition detected during the acquisition phase causes the Active LED to blink out Morse Code 5 i e three short flashes three long flashes and three short flashes A pause occurs then the pattern repeats The calibration failed but the existing calibration in the module is UNAFFECTED 2 7 5 Calibration Troubleshooting If the LED does not follow the slow fast blinking that describes a successful calibration one or more of the calibration resistors may be out of range Call CTI if module does not properly calibrate after re checking the procedure and calibration connector 2 8 Checking Module Operation First turn on the base power If the module diagnostics detect no problems the status indicator on the front of the module will be solid red If the status indicator does not light begins blinking or goes out during operation the module has detected a failure For information on viewing failed module status refer to your SIMATIC TISOFT user manual To diagnose and correct a module failure refer to the next section on troubleshooting You must also check that the module is configured in the memory of the PLC This is important because the module will appear to be functioning regardless of wheth
12. CTI 2559 RTD EIGHT POINT RTD MODULE INSTALLATION AND OPERATION GUIDE Version 1 2 CTI Part 062 00337 012 2559RTDIOG 062209 25 Copyright 2005 Control Technology Inc All rights reserved This manual is published by Control Technology Inc 5734 Middlebrook Pike Knoxville TN 37921 This manual contains references to brand and product names that are trade names trademarks and or registered trademarks of Control Technology Inc Siemens and Simatic are registered trademarks of Siemens AG Other references to brand and product names are trade names trademarks and or registered trademarks of their respective holders DOCUMENT DISCLAIMER STATEMENT Every effort has been made to ensure the accuracy of this document however errors do occasionally occur CTI provides this document on an as 15 basis and assumes no responsibility for direct or consequential damages resulting from the use of this document This document is provided without express or implied warranty of any kind including but not limited to the warranties of merchantability or fitness for a particular purpose This document and the products it references are subject to change without notice If you have a comment or discover an error please call us toll free at 1 800 537 8398 REVISION HISTORY Version 1 0 12 13 04 Original Release Version 1 1 01 05 05 Version 1 2 11 12 08 Corrections made to Table 3 1 and Table 3 2 added 06 22 09 Corrections
13. Configuration applies to ALL CHANNELS NOTE Shipping Configuration 1000 Pt0 003850 Fx 10 3 Wire 16WX 60Hz Digital Filtering Table 2 1 Dipswitch Assignments One of eight values 1 2 and 3 1000 Input for input resistance resistance at 0 C Also selects Pt 0 003850 DIN at 0 C the reporting scale i for direct O input Probe type One of 7 RTD curves 16WX Fx 10 C x 10 1 2 4 Enabled ohms x 10 Run 4 5 and 6 WX input ohms 100 scaled integer 16WX separate error Error format hd 8WX upscale errors 32752 and above Input filtering 50 or 60 Hz Digital filtering Enable Disable Calibration Run or calibration mode Figure 2 1 shows the location of the two switch blocks on the module with a detailed diagram illustrating the location and function of the dipswitches used to configure the module Compensation 8 CTI 2559 RTD Installation and Operation Guide RID 111 1009 x10 011 5000 x10 2 3 Wire 110 1200 x10 010 1k 0 x10 16WX Error Words Multiplier 101 1308 x10 001 10 0 60 Hz x 100 2000 x10 000 9 050 x100 Filter ON E fr Run y 12345678 123456780 e pe T 111 0 003850 DIN 011 Cu 0 004274 11 x10 Cal 110 Pt 0 003916 US 010 Ni 0 006720 WX 10 x10 C 50 Hz 101 Pt 0 003902 001 0 006178 DIN 01 Ohms 0 8WX U
14. DC or VAC continuous 100 Cu 100 to 260 148 to 500 1000 Pt 200 to 850 C 328 F to 1562 F 1200 Pt 80 C to 260 C 112 F to 500 F 16 bits Measurement returned in 0 1 degree resolution as temperature x10 or as an integer 0 32000 Data word includes sign bit and 15 Bit data 21 Measurement Units Digital Filtering Time Constant Update Time Repeatability Accuracy Common Mode Rejection Normal Mode Rejection at line frequency 0 01 Hz at line frequency 3 Hz Step response time 100 Pt Step response time Inputs to 2 Connector Wire Gauge Backplane Power Module size Isolation Operating Temperature Storage Temperature Relative Humidity Agency Approvals Pending Shipping Weight C F or Ohm selectable by module 1000 ms with digital filtering enabled 25 ms no filtering all channels 0 1 C 0 2 for all RTD types 1000 Pt 0 9 C 1 6 F from 0 60 C 100 0 36 from 0 60 C gt 130 dB 60 Hz gt 80 dB gt 25 dB 25 ms 25 ms Removable 14 22 AWG 5 VDC 2 8 Watt maximum 5 VDC 0 0 Watt Single wide 1500V channel to backplane 0 to 60 C 32 to 140 F 40 to 85 C 40 to 185 F 5 to 95 non condensing UL ULC FM Class 1 Div 2 1 5 165 0 68 Kg Specifications subject to change without notice 22 CTI 2559 RTD Installation and Operation Guide APPENDIX COMPATIBILITY WI
15. HAPTER 3 TROUBLESHOOTING wisscssscscssisscssssessssscasscsotescosctessssscosesssassossesbesseesdessonsecseasseseesesnseeseeseesoass 18 HARDWARE SPECIFICATIONS 21 APPENDIX A COMPATIBILITY WITH SIEMENSO 505 7038 uusarsasssssonessssnssnesonsnnennsnnensssnnsnesonsnnssnnee 23 APPENDIX RTD TEMPERATURE VS RESISTANCE usssssossossorsnsssssonensssnssnesonsnnsnnsnnensssnssnssansnnssenne 25 LIMITED PRODUCT WARRANTLY u soci 27 REPAIR POLICY 28 X CTI 2559 RTD Installation and Operation Guide TABLE OF FIGURES Figure 1 1 CTI 2559 RTD Front Panel 2 Figure 1 2 Word Input to the PLC 3 sense ee ene tein EI Rete erret eig cedes 4 Figure 1 3 Digital Representation of Input Temperature Change eae 4 Figure 2 1 Configuration Dipswitch Location and 9 Figure 2 2 Screw Terminal Connector eese rennen nre enne ene 11 Fig re 2 3 RTD Sensor Wiring eei kun e eei eie p nei e oe eerie i ede 12 Figure 2 4 Terminating the Wire Shielding 13 Figure 2 5 Input Connector 14 Figure 2 6 Calibration Connector Wiring Diagram 15 Figure 2 7 Example I O Configuration 17 Figure 3 1 Troubleshooting 18 Tables LI RED Rei E iue oe onto 3 Table 1 2 Supported RTD Ohm Values
16. TH SIEMENS 505 7038 Overview The CTI 2559 RTD RTD Module was designed to be a drop in replacement for the Siemens Model 505 7038 Set up of the module wiring and PLC reporting are compatible with the 505 7038 Digital filtering has been added as a user selectable option with dipswitch 4 on switch block 2 Using the CTI 2559 RTD in a 505 7038 application The CTI 2559 RTD should fulfill all the following requirements for the 505 7038 replacement as outlined below Module setup The CTI 2559 RTD sets up the same as its Siemen s counterpart Refer to Chapter 2 for details Wiring The wiring of the input connector is the same for both modules PLC Reporting The word format is the same for each module See Chapter for a more detailed explanation on PLC reporting CTI 2559 RTD Installation and Operation Guide 23 APPENDIX TEMP VS RESISTANCE Table C 1 Platinum 0 003850 DIN Table C 2 120 ohm Nickel m 1000 200 300 00 9 120 00 120 00 392 579 20 10 0 572 1060 09 752 1235 19 932 1404 48 60 31359 62719 156797 1725 66 1472 187755 1562 390 26 1951 31 C Ohms 328 gt o 10 00 CTI 2559 RTD Installation and Operation Guide 25 LIMITED PRODUCT WARRANTY CTI warrants that this CTI Industrial Product shall be free from defects in material and workmanship for a period of one 1 year after purchase from CTI or from an authorized CTI Industrial Distrib
17. aining RTD input channels CTI 2559 RTD Installation and Operation Guide 11 Module Sense Source Shield 1 Two wire no lead compensation Set module to 2 3 wire mode Earth ground Module Source Earth ground Shield 7 7 ho et Sense Three wire lead compensation Module oe Sense Source Earth ground N C Shield 1 pn Sl Four wire lead compensation Figure 2 3 RTD Sensor Wiring 12 CTI 2559 RTD Installation and Operation Guide 2 5 2 Terminating the Wire Shielding Conductor shielding must be connected to earth ground Terminating the shield to earth ground at the PLC is preferred If terminating the shield at the PLC follow procedures illustrated in Figure 2 4 NEVER terminate the shield at both the RTD and PLC CABLE GROUNDING Remove a length of cable Pull the foil shield and bare Twist the foil shield and drain Attach a ground lug jacket from the cable drain wire from the insulated wire together to form a single wires strand Bare drain wire S Insulated S MN shield 17 0 0 y Siemens SIMATIC SIMATIC TI 505 1545 D E CHASSIS GROUND REMOVE SCREW LOCATED ON SIDE OF RACK AND USE TO CONNECT
18. ble 3 2 This allows the error to be detected in your application program without immediately affecting controller operation Errors are reported as values greater than or equal to 32752 Refer to Table 3 2 for error code descriptions CTI 2559 RTD Installation and Operation Guide CHAPTER 2 INSTALLATION The installation of the Eight Point RTD Module involves the following steps Planning the installation Unpacking and configuring the module Wiring the input connector Inserting the module into the base un Checking module operation The steps listed above are explained in detail in the following pages 2 1 Planning the Installation Planning is the first step in the installation of the module This involves calculating the I O base power budget and routing the input signal wiring to minimize noise and selecting RTDs The following sections discuss these important considerations 2 1 1 Calculating the Base Power Budget The Model 2559 RTD requires 2 8 watt maximum of 5 VDC power from the base Use this value to verify that the base power supply is not exceeded 2 1 2 Input Signal Wiring Input signal wiring can be 2 3 or 4 wire twisted shielded cable The cable can be stranded or solid 14 24 AWG wire Standard practices usually require that all shields be tied together and grounded at a single point These guidelines will minimize noise problems when installing the module e Always use the shor
19. e base as a WX16 module Errors are reported in words WX 9 16 In the zero position the module logs into the base as a WX8 module When errors occur error words are written to the corresponding data word and the error condition must be cleared before data is again reported 2 3 6 Selecting Digital Filtering Digital Filtering is selected by positioning dipswitch 4 on switch block 2 in the 1 position Selecting digital filtering will limit data fluctuations due to signal noise 2 3 7 Selecting Run or Calibration Mode Dipswitch 8 on switch block two is in the 1 position for normal operation To calibrate the module put dipswitch 8 in the 0 position 2 4 Inserting the Module into the Base Avoid installing the 2559 RTD in a slot adjacent to a high energy switching module WARNING Turn power off to base before installing or removing the module Insert the module into the I O base by carefully pushing the module into the slot When the module is fully seated in the slot and backplane connector tighten the captive screws at the top and bottom to hold the module in place To remove the module from the I O base loosen the captive screws then remove the module from the VO base Be careful not to damage the edge card at the back of the module when inserting or removing the module 2 5 Wiring the Input Connectors Input signals are accepted through a standard 40 terminal connector located on the front of the module Figure 2 2 ill
20. e loads or with resistive sensors Resistance measurements are made by setting dipswitches 7 and 8 on switch block 1 to Ohms 0 Dipswitches 1 2 and 3 on switch block 1 are used to select the order of magnitude of the resistance to be measured 10 Q or Ik By selecting 10 Ohm values are reported as ohms x 100 to the PLC and selecting reports ohms x 10 CTI 2559 RTD Installation and Operation Guide 3 1 6 Digital Word RTD inputs are translated into 16 bit digital words Figure 1 2 illustrates the WX word format represented in the PLC MSB LSB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 0 0000000000000 Sign 15 Bits Reporting Data Bit Figure 1 2 Word Input to the PLC 1 7 RTD Input to Digital Conversion 1 7 1 Engineering Units Temperature can be reported in Fahrenheit or Celsius degrees times 10 as a word input As an example the following Figure 1 2 illustrates the effects of a change in input level going from 0 to 102 4 F in the Input Mode Example 1 0 0 F Digital Word WX 10 MSB LSB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 0000000000000 3 lo IA ueris 32 1167 95873428 1 Example 2 102 4 F Digital Word WX 10 MSB LSB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 0 0 0 0 0 010 1024 0 0 3216 8 4 2 1
21. ent applications CAUTION For proper operation ensure that the 2559 RTD and the RTD wires are not subjected to drafts or large temperature gradients during operation NOTE In the event the 2559 RTD detects an onboard module failure the module will assert the module fail line and report the module failure in the Status Word which is reported to the PLC CTI strongly recommends the user application monitor the I O Module Status Words which are Status Words 11 26 and apply to SIMATIC Controllers TI 545 TI 555 11 560 amp 565 and the TI 575 The I O Module Status Word can be used to report a module failure for an I O Module in any of the 505 I O slots Please refer to Siemens SIMATIC 505 Programming Reference Manual for more information If a module failure is reported by the status word the module should be replaced with a unit and the failed module sent in for repair CTI 2559 RTD Installation and Operation Guide 17 CHAPTER 3 TROUBLESHOOTING If the module provides improper readings or the Active LED status indicator is not on use the following chart to determine the appropriate corrective action Symptom Active LED is not lit Active LED is blinking Incorrect inputs Input does not work with PID loop or analog alarm block Value is too large Incorrect values to PLC values off by 10 15 degrees Probable Cause Base or PLC power is off Module has failed Blown fuse No calib
22. er it is communicating with the PLC To view the PLC memory configuration chart listing all slots on the base and the inputs or outputs associated with each slot refer to your SIMATIC TISOFT Programming Manual An example chart is shown in the following figure 16 CTI 2559 RTD Installation and Operation Guide Module Definition for Channel 1 Base 00 Number of Bit and Word VO Address Special Slot X Y WX WY Function 1 0001 00 00 08 00 2 0000 00 00 00 00 15 0000 00 00 00 00 16 0000 00 00 00 00 Figure 2 7 Example I O Configuration Chart In this example the 2559 RTD module is inserted in slot 1 in I O base 0 and configured as WX8 word module Data for channel 1 appears in word location WX1 data for channel 2 appears in word location WX2 etc For your particular module look in the chart for the number corresponding to the slot occupied by the module If word memory locations appear on this line then the module is registered in the PLC memory and the module is ready for operation If the line is blank or erroneous re check the module to ensure that it is firmly seated in the slots Generate the PLC memory configuration chart again If the line is still incorrect contact your local distributor or at 1 800 537 8398 for further assistance NOTE Refer to Hewlett Packard Applications Note 290 or Omega Temperature Handbook Volume 26 Section T for practical RTD measurem
23. hort SHOR Omens 0 Rau wie Check wiring sensor from Sense to Sense 4 wire 32762 TFFA Input not wired al Wire module channel wired Source Sense and Sense 32761 7FF9 Source open Source to Return 2 20K Q Check Source wire 32760 7FF8 Not used 32759 7FF7 Sense open Check Sense wire 30758 gppg Oee to Remen loo rom Source to Ret m Check wiring sensor overrange 32757 7FF5 Not used 32756 7FF4 Not used 32755 7FF3 Not used 32754 7FF2 Not used Invalid RTD Type Invalid selection of RTD material en an selected TCR and Q combination 32752 7FFO Not used Module is correctly performing 4 wire 4 0004 Four wire mode conversions for this input separate oca error words only functioning properly 20 CTI 2559 RTD Installation and Operation Guide HARDWARE SPECIFICATIONS Input Channels RTD Types Supported Ohm values Supported Probes Types RTD Excitation Current Lead Compensation Input Overrange Protection Measurement Ranges ADC Resolution Data Presentation CTI 2559 RTD Installation and Operation Guide 8 RTD inputs Platinum 0 003850 European DIN Standard Platinum 0 003916 American Curve Platinum 0 003902 Platinum 0 003920 Copper 0 004274 Nickel 0 006720 Nickel 0 006178 European DIN Standard Ohms 0 0 1000 1200 1300 2000 500 Q 1000 Q 100 9 03 Q 2 3 amp 4 wires 250 micro Amp 1000 2 per lead wire max 30 V
24. ize the difference in resistance between the Source and Return Resistive differences cause offsets Wire the Sensor as illustrated in Figure 2 3 Restrict the lead resistance to less than 500 Source and Return wires should have same temperature coefficient 0000 2 1 3 3 Two wire RTDs Two wire RTDs can be used if accuracy is non critical Lead resistance and lead wire temperature drift cause temperature offsets 2 2 Unpacking the Module Open the shipping carton and remove the special anti static bag which contains the module After discharging any static build up remove the module from the static bag Do not discard the static bag Always use this bag for protection against static damage when the module is not inserted into the 1 O backplane CAUTION HANDLING STATIC SENSITIVE DEVICES The components on the Model 2559 RTD module printed circuit card can be damaged by static electricity discharge To prevent this damage the module is shipped in a special anti static bag Static control precautions should be followed when removing the module from the bag when opening the module and when handling the printed circuit card during configuration CTI 2559 RTD Installation and Operation Guide 2 3 Configuring the Module The 2559 RTD is configured using two switch blocks located at the top front of the module Table 2 1 lists the features and options associated with the dipswitches and the default configuration of the module NOTE
25. pscale Errors e 100 Pt 0 003920 00 Integer 4 Wire Figure 2 1 Dipswitch Locations and Function 2 3 1 Selecting the Input Resistance Dipswitches 1 2 and 3 are used to select RTD resistance for the probe types When measuring ohm values select Zk which reports ohms x 10 or 10 when measuring resistive values less than 100 These values are reported as ohms x 100 Refer to Figure 2 1 2 32 Selecting RTD Probe Type Seven RTD material types are selectable using dipswitches 4 5 and 6 on switch block 1 Refer to Figure 2 1 2 3 3 Selecting WX Word Input Format Dipswitches 7 and 8 on switch block 1 are used to select the format that data is presented in the WX input word for the 8 channels Refer to Section 1 7 1 for engineering format and Section 1 7 2 for scaled integer format Reporting ohm resistive values is also selected using dipswitches 7 and 8 on switch block 1 Data is presented as ohms x 10 or 100 F x 10 C x 10 or as a scaled integer CTI 2559 RTD Installation and Operation Guide 9 2 3 4 Selecting Lead Resistance Compensation Dipswitch 1 on switch block 2 is used to select the type of lead compensation Two and three wire compensation is selected with 1 and 4 wire with 0 2 3 5 Selecting the Error Formatting Dipswitch 2 on switch block 2 is used to select how errors are reported With the dipswitch in the 1 position the module logs into th
26. ration data Wrong addresses for word input Not logged in Incorrectly calibrated Value is not reported as integer 0 32 000 Temperature is reported to PLC as value x10 DIP switch not set in correct position Wrong RTD type selected by dipswitches Unbalanced lead wires Signal wire noise Corrective Action Turn base or PLC on Return to CTI for repair Measure 1 for continuity Return to CTI if Blown Return to CTI for calibration or recalibrate per manual Check program for correct word input addresses Read I O configuration Return the module to CTI for calibration or recalibrate according to instructions Select INTEGER format with dipswitches 7 and 8 on SWI Divide value by 10 in PLC Verify position of dipswitches Verify position of dipswitches Check lead resistance Refer to Section 2 1 2 Figure 3 1 Troubleshooting Matrix When it is inconvenient to visually check the status indicator use the TISOFT Display Failed I O or Show PLC Diagnostics support functions If after consulting the chart above you are unable to diagnose the problem contact your local distributor or CTI at 1 800 537 8398 for further assistance CTI 2559 RTD Installation and Operation Guide Table 3 1 Problem Codes and Messages Reported in Three Wire Mode Signed Integer Problem Not used Description Corrective Action Input underrange RTD input is below expected range
27. test possible cables e Avoid placing low voltage wire parallel to high energy wire if the two wires must meet cross them at a right angle Avoid bending the wire into sharp angles Use wire raceways or conduit for wire routing Avoid placing wires on any vibrating surface Use a 4 wire conductor with shielding and tie shield to ground Terminating the shield to earth ground at the PLC is preferred Never terminate the shield at both the RTD and PLC 2 1 3 Selecting RTDs RTDs should be selected to optimize the accuracy of temperature measurements over the range of temperatures to be measured survive in the environmental conditions where it will operate and be appropriately packaged to meet the mounting requirements Platinum RTD probes are the most stable material that is commonly used and provide long term accuracy Refer to manufacturer s recommendation to determine the best RTD for a particular application 6 CTI 2559 RTD Installation and Operation Guide 2 1 3 1 Four wire RTDs Four wire RTDs give the best accuracy and are not affected by changes in terminal wire or contact impedance Wire type and temperature coefficients do not affect accuracy and wire impedance is relatively unimportant for the Sense and Sense wires 2 1 3 2 Three wire RTDs Three wire RTDs are less accurate than the 4 wire RTDs The contact resistances cannot be compensated for and could become significant The following guidelines will minimize errors o Minim
28. tion of 2559 RTD is accomplished by the use of a standard 505 connector CTI P N 4 565 and four precision resistors Make sure the resistors meet or exceed the specifications in Table 2 2 Table 2 2 Precision Resistor Values for Calibration Ohms Tolerance Temperature Coefficient 20 00 0 001 25 ppm C 402 0 0 001 10 ppm C 2000 0 0 001 10 ppm C 4020 0 0 001 10 ppm C 14 CTI 2559 RTD Installation and Operation Guide 2 7 2 Calibration Connector Wiring Instructions Precision resistor values for calibration are installed on a specially wired 40 Pin connector which MUST be in place prior to initiating the calibration The connector is wired as follows 00 0000 Channel 1 Channel 2 Channel 3 Channel 4 Channel 5 Channel 6 Channel 7 Channel 8 Four Wire 2000 0 Ohm Resistor 500 Ohm Range Short all four terminals Four Wire 402 0 Ohm Resistor 100 Ohm Range Short all four terminals Four Wire 20 00 Ohm Resistor 10 Ohm Range Short all four terminals Four Wire 4020 0 Ohm Resistor 1K Ohm Range Short all four terminals The calibration connector wiring for channels 1 4 is illustrated in Figure 2 6 Channels 5 8 are wired similarly just substitute resistor values from the preceding list 2 7 3 Calibration Procedure Channel 1 Channel 3 402 00 20000 SSSSSSSSSS Al
29. ustrates how the wiring is connected to the front connector via recessed screw terminals The screw terminals can accept wire sizes up to single stranded 14 gauge wire The actual size used depends on the RTD wire providing the input signal To assign an input to a specific channel locate the appropriate channel position on the screw terminal connector as shown in the Figure 2 4 and connect wiring 10 CTI 2559 RTD Installation and Operation Guide CH1 CH1 CH1 CH1 CH3 CH3 CH3 CH3 CH5 CH5 CH5 CH5 CH7 CH7 CH7 CH7 Sense Return Source Shield Sense Return Sense Source Shield Sense Return Sense Source Shield Sense Return Sense Source Shield Sense Return Sense Source Shield Sense Return Sense Source Shield Sense Return Sense Source Shield Sense Return Sense Source Shield CH 2 CH2 CH2 CH2 CH4 CH4 CH4 CH4 CH 6 CH6 CH6 CHE CH8 CH8 CH8 CH8 Figure 2 2 Screw Terminal Connector Wiring 2 5 1 Connecting RTD Input Wiring For RTD input circuits connect the RTD wires to the screw terminals on the front connector Refer to Figure 2 2 and Figure 2 3 to determine the correct channel and proper wiring connections for 2 wire 3 wire and 4 wire RTDs After the wires are inserted in the correct terminals tighten the screws using CARE not to over tighten and strip the connector terminal Repeat this procedure for the rem
30. ut sampling of the module do not occur at the same time Instead the module will translate all RTD inputs in one module update 25 milliseconds maximum and store the translated words in buffer memory The PLC retrieves the stored words from the module buffer memory at the start of the scan 9 CTI 2559 RTD Installation and Operation Guide 1 3 Immediate The 2559 RTD has been tested and is fully compatible with the immediate input instruction for the SIMATIC 545 and 555 PLCs 1 4 Supported RTD Probes 1 4 1 RTD Probe Types Seven RTD probe types from standard RTD materials are supported as inputs to the 2559 RTD The types supported are listed in Table 1 1 RTD types are selectable with dipswitches 4 5 and 6 on switch block 1 1 4 2 RTD Ohm Values RTD types are supported in the following ohm values listed in Table 1 2 These values are selectable with dipswitches 1 2 and 3 on switch block 1 RTD Type Ohms 0 0 Platinum 0 003850 100 Q Platinum 0 003916 1200 Platinum 0 003902 1300 200 Q 500 1000 Q 100 9 03 Q Table 1 1 RTD Types Table 1 2 Supported RTD Ohm Values 1 4 3 2 Wire 3 Wire and 4 Wire RTDs The 2559 RTD supports 2 wire 3 wire and 4 wire RTD probes that are selectable on dipswitch 1 on switch block 2 Position 0 1 for 4 wire RTDs and position 1 selects 2 and 3 wire RTDs 1 5 Direct Resistive Device Input Direct ohm inputs to the module are supported for measuring resistiv
31. utor This CTI Industrial Product will be newly manufactured from new and or serviceable used parts which are equal to new in the Product Should this CTI Industrial Product fail to be free from defects in material and workmanship at any time during this 1 year warranty period CTI will repair or replace at its option parts or Products found to be defective and shipped prepaid by the customer to a designated CTI service location along with proof of purchase date and associated serial number Repair parts and replacement Product furnished under this warranty will be on an exchange basis and will be either reconditioned or new All exchanged parts or Products become the property of CTI Should any Product or part returned to CTI hereunder be found by CTI to be without defect CTI will return such Product or part to the customer This warranty does not include repair of damage to a part or Product resulting from failure to provide a suitable environment as specified in applicable Product specifications or damage caused by an accident disaster acts of God neglect abuse misuse transportation alterations attachments accessories supplies non CTI parts non CTI repairs or activities or to any damage whose proximate cause was utilities or utility like services or faulty installation or maintenance done by someone other than CTI Control Technology Inc reserves the right to make changes to the Product in order to improve reliability function
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