Allen-Bradley 1756 Reference Manual
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Allen-Bradley 1756 Reference Manual

Migrating 6-channel to 8-channel analog modules
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Reference Manual
Original Instructions
Migrating 6-channel to 8-channel 1756 Analog Modules
Catalog Numbers 1756-IF6CIS, 1756-IF6I, 1756-IF8I, 1756-IR6I, 1756-IRT8I, 1756-IT6I, 1756-IT6I2, 1756-OF6CI, 1756-OF6VI,
1756-OF8I

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Summary of Contents for Allen-Bradley 1756

  • Page 1 Reference Manual Original Instructions Migrating 6-channel to 8-channel 1756 Analog Modules Catalog Numbers 1756-IF6CIS, 1756-IF6I, 1756-IF8I, 1756-IR6I, 1756-IRT8I, 1756-IT6I, 1756-IT6I2, 1756-OF6CI, 1756-OF6VI, 1756-OF8I...
  • Page 2 Important User Information Read this document and the documents listed in the additional resources section about installation, configuration, and operation of this equipment before you install, configure, operate, or maintain this product. Users are required to familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws, and standards.

  • Page 3: Table Of Contents

    Using an External Loop Supply with the 1756-IF6CIS Module . . . 17 All 1756-IF6CIS channels are supplying loop power ..18 One or more 1756-IF6CIS channels use external loop supply . 18...
  • Page 4 1756-IR6I to 1756-IRT8I 4-Wire RTD......34 1756-IT6I to 1756-IRT8I TC or mV ......35 1756-IT6I2 to 1756-IRT8I TC or mV.

  • Page 5: Preface

    Preface Overview This manual describes how to migrate from 1756, 6-channel isolated analog I/O modules to their newer 8-channel isolated counter parts in the 1756 analog I/O platform. Migration Services Throughout the product lifecycle, as products mature, Rockwell Automation will be there as your partner to help you get the most out of your current equipment, to help you determine your next steps, and to help you lay out a plan for the transition to newer technology.
  • Page 6 Preface Notes: Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 7: 6- And 8-Channel Modules

    8-point general purpose isolated 1756-IF6I analog current/voltage input module. 1756-IRT8I 1756-IR6I 8-point isolated combined 1756-IT6I temperature and mV sensing input 1756-IT6I2 module. 1756-OF8I 1756-OF6CI 8-point general purpose isolated 1756-OF6VI analog current/voltage output module. Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 8: Wiring

    1492 cable. For example, if you have an existing application with a 1756-IF6I module used in Voltage mode that is wired with 1492 products, you would be using a 1492-AIFM6S-3 terminal block.

  • Page 9: Wiring Without 1492 Analog Interface Modules

    If your existing system does not already use 1492 products then you must replace and rewire your existing RTB. See Appendix B, RTB Wiring for examples of converting from the existing 6 channel RTB to the new 8 channel RTB. Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...
  • Page 10 Chapter 1 Replacement Considerations Notes: Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 11: Emulation Mode Overview

    All data to or from an 8-channel module is rearranged from a 6-channel module format to an 8-channel module format. The controller still sends data in the 1756-IF6I format but firmware internally moves data to the 1756-IF8I format. 1756-IF6I configuration example controller...
  • Page 12 Emulation Mode Figure 1 shows the data sent from IF6I to IF8I. Figure 1 - IF6I Configuration Example Figure 2 shows how the IF8I sees the data internally. Figure 2 - 1756-IF8I Data Example Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 13: Emulation Mode Differences

    6-Channel 6-Channel Emulation Emulation Underrange Overrange Underrange Overrange 1756-OF6CI 0…20mA 0.00 21.07435 0.00 21.00 1756-OF6VI +/- 10V -10.5172 10.5172 -10.50 10.50 (1) Emulation in these values is limited compared to the 6-channel modules. Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...
  • Page 14 Chapter 2 Emulation Mode Notes: Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 15: Backplane Power

    Calibration RPI and RTS Values of 6- Channel vs. 8- Channel Modules 16 Cold Junction Compensation on Thermocouple Modules Using an External Loop Supply with the 1756-IF6CIS Backplane Power Current Draw Depending on the module, configuration, and operating conditions, 8-channel modules can draw more backplane power than their 6-channel counter parts.

  • Page 16: Calibration

    For example, if you are using a 1756-IF6I with the RPI set to 25 ms and the RTS set to 50 ms, the IF6I scans and changes the actual input data at the 50 ms RTS rate.

  • Page 17: Cold Junction Compensation On Thermocouple Modules

    CJC resistor that is electrically compatible with 1756 modules. Using an External Loop The 1756-IF6CIS module can be used to supply loop power to an end device. The module can simplify wiring and reduce the cost of installation by Supply with the eliminating the need for an external loop supply.

  • Page 18: All 1756-If6Cis Channels Are Supplying Loop Power

    IF6CIS are supplying loop power, and there is no additional work required. One or more 1756-IF6CIS channels use external loop supply If one or more RTB VOUT-x terminals are unused and one or more RTB RTN-x terminals are used, then one or more of the IF6CIS channels has an external loop supply, and you must use the following format.
  • Page 19 Module Reconfigure MSG, Issue a CIP Generic Device Reset MSG, or Inhibit and Uninhibit the IF6CIS after any applied Configuration Tab changes. WARNING: The 1756-IF6CIS module, when used for sourcing, has a sourcing voltage maximum of 30V DC and a sourcing current maximum of 30 mA. The 1756-IF8I module, when used for sourcing, has a sourcing voltage maximum of 38V DC and a sourcing current maximum of 45 mA.
  • Page 20 Chapter 3 Hardware Specifications and Considerations Notes: Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 21: Updating The Firmware

    1 and 2. A 6-channel module can be updated if any owning connection was in Run mode. An 8-channel input module (catalog number 1756-IF8I or 1756-IRT8I) in Emulation mode can only be updated if there are no owner connections to the module.

  • Page 22: Communication Format Support Between 6- And 8- Channel Modules

    We strongly recommend that you do not use Disable Keying. If you use Disable Keying, you must take full responsibility for understanding whether the device being used can fulfill the functional requirements of the application. Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 23: Cst Time Stamp Data And Rolling Time Stamp

    “Mode or State of module doesn’t allow object to perform requested service” error because it didn’t accept a “Device Reset” CIP generic message. Under the same conditions, a 6-channel module would accept a Device Reset command. Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 24: Communication Formats

    The examples in this section show the communication formats for the 6- and 8- channel modules. 1756-IF8I Communication Formats The 1756-IF8I will support all of the following 6-channel modules and their respective Communication Formats: 1756-IRT8I Communication Formats The 1756-IF8I will support all of the following 6-channel modules and their...

  • Page 25: 1756-Of8I Communication Formats

    Application Conversion Chapter 4 1756-OF8I Communication Formats The 1756-OF8I will support all of the following 6-channel modules and their respective Communication Formats: Configuration When used in Emulation mode, all 8-channel modules will accept configuration data in the 6-channel module style. Therefore, any way the 6-channel module configuration data is generated, the 8-channel module will accept it.

  • Page 26: Eds Updates For Rslinx Software

    Mismatch and an Internal State of 16#0065 unknown (if in Run mode) or 16#0075 unknown (if in Program mode). Mismatch and “unknown” does not create any issues. See KB ID 581299 for more information on Mismatch and “unknown”. Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 27: Status Indicators

    – Wire off detection – Calibration fault Flashing red One of the following: • The channel is faulted. See the previous row for more information about faults. • The channel is being calibrated. Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 28: Status Indicators For The 1756-Irt8I Module

    • The channel is faulted. Some possible causes of the fault include: – Triggered clamp alarm – Wire off detection – Calibration fault Flashing red The channel is faulted. See the previous row for more information about faults. Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 29: 1756-If6I To 1756-If8I Voltage Mode

    Appendix RTB Wiring 1756-IF6I to 1756-IF8I Voltage Mode Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 30: 1756-If6I To 1756-If8I Current Mode

    Appendix A RTB Wiring 1756-IF6I to 1756-IF8I Current Mode Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 31: 1756-If6Cis To 1756-If8I Modules Provide Loop Power

    RTB Wiring Appendix A 1756-IF6CIS to 1756-IF8I Modules Provide Loop Power 2-Wire Transmitter Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 32: 1756-If6Cis To 1756-If8I User Supplied Loop Power

    Appendix A RTB Wiring 1756-IF6CIS to 1756-IF8I User Supplied Loop Power 4-Wire Transmitter 2-Wire Transmitter Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 33: 1756-Ir6I To 1756-Irt8I 3-Wire Rtd

    RTB Wiring Appendix A 1756-IR6I to 1756-IRT8I 3-Wire RTD Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 34: 1756-Ir6I To 1756-Irt8I 4-Wire Rtd

    Appendix A RTB Wiring 1756-IR6I to 1756-IRT8I 4-Wire RTD Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 35: 1756-It6I To 1756-Irt8I Tc Or Mv

    RTB Wiring Appendix A 1756-IT6I to 1756-IRT8I TC or mV CJC only needed if using 1 or more Thermocouples Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 36: 1756-It6I2 To 1756-Irt8I Tc Or Mv

    Appendix A RTB Wiring 1756-IT6I2 to 1756-IRT8I TC or mV CJC only needed if using 1 or more Thermocouples Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 37: 1756-Of6Vi To 1756-Of8I Voltage Mode

    RTB Wiring Appendix A 1756-OF6VI to 1756-OF8I Voltage Mode Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 38: 1756-Of6Ci To 1756-Of8I Current Mode

    Appendix A RTB Wiring 1756-OF6CI to 1756-OF8I Current Mode Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 39: Index

    13 input ranges 13 output ranges 13 overview 11 external loop supply 17 1756-IF6CIS 17 integrated architecture tools 5 migration services 5 module info tab 26 product comparison 7 rolling time stamp 23 Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...

  • Page 40: Rockwell Automation Publication 1756-Rm011A-En-P - June

    Index Notes: Rockwell Automation Publication 1756-RM011A-EN-P - June 2016...
  • Page 42 Rockwell Automation maintains current product environmental information on its website at http://www.rockwellautomation.com/rockwellautomation/about-us/sustainability-ethics/product-environmental-compliance.page. Allen-Bradley, ControlFlash, ControlLogix, Rockwell Automation, Rockwell Software, RSLinx, and RSLogix 5000 are trademarks of Rockwell Automation, Inc. Trademarks not belonging to Rockwell Automation are property of their respective companies.

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