Allen-Bradley 1756 ControlLogix User manual

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
Reference Manual
Original Instructions

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.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are
required to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may
be impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from
the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
Labels may also be on or inside the equipment to provide specific precautions.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous
environment, which may lead to personal injury or death, property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property
damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
IMPORTANT Identifies information that is critical for successful application and understanding of the product.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).

Rockwell Automation Publication 1756-RM011A-EN-P - June 2016 3
Table of Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Migration Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Integrated Architecture Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chapter 1
Replacement Considerations 6- and 8-Channel Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Product Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Wiring with 1492 Analog Interface Modules. . . . . . . . . . . . . . . . . . 8
Wiring without 1492 Analog Interface Modules . . . . . . . . . . . . . . 9
Chapter 2
Emulation Mode Emulation Mode Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Emulation Mode Differences. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Input Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Output Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Chapter 3
Hardware Specifications and
Considerations
Backplane Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Current Draw. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
RPI and RTS Values of 6-channel versus 8-channel Modules . . . . . 16
Cold Junction Compensation on Thermocouple Modules . . . . . . . . 17
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

4Rockwell Automation Publication 1756-RM011A-EN-P - June 2016
Table of Contents
Chapter 4
Application Conversion Updating the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Communication Format Support Between 6- and 8-channel
Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Electronic Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
CST Time Stamp Data and Rolling Time Stamp . . . . . . . . . . . . . . . . 23
CIP Generic Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Communication Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
1756-IF8I Communication Formats . . . . . . . . . . . . . . . . . . . . . . . . 24
1756-IRT8I Communication Formats . . . . . . . . . . . . . . . . . . . . . . 24
1756-OF8I Communication Formats . . . . . . . . . . . . . . . . . . . . . . . 25
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Tag Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
RSLogix 5000 Version Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
EDS Updates for RSLinx Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Module Info Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Chapter 5
Diagnostics Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Status Indicators for the 1756-IF8I Module . . . . . . . . . . . . . . . . . . . . . 27
Status Indicators for the 1756-IRT8I Module . . . . . . . . . . . . . . . . . . . 28
Status Indicators for the 1756-OF8I Module . . . . . . . . . . . . . . . . . . . . 28
Appendix A
RTB Wiring 1756-IF6I to 1756-IF8I Voltage Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1756-IF6I to 1756-IF8I Current Mode . . . . . . . . . . . . . . . . . . . . . . . . . 30
1756-IF6CIS to 1756-IF8I Modules Provide Loop Power . . . . . . . . 31
1756-IF6CIS to 1756-IF8I User Supplied Loop Power . . . . . . . . . . . 32
1756-IR6I to 1756-IRT8I 3-Wire RTD. . . . . . . . . . . . . . . . . . . . . . . . . 33
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. . . . . . . . . . . . . . . . . . . . . . . . . . 36
1756-OF6VI to 1756-OF8I Voltage Mode . . . . . . . . . . . . . . . . . . . . . . 37
1756-OF6CI to 1756-OF8I Current Mode . . . . . . . . . . . . . . . . . . . . . 38
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Rockwell Automation Publication 1756-RM011A-EN-P - June 2016 5
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.
Whether you choose to migrate all at once or use our unique, phased approach
to help minimize the costs, risks, and complexities involved with managing
legacy products and systems, Rockwell Automation has the tools and the
experience to guide you through the transition.
For more information, see Migration Solutions Brochure, publication
MIGRAT-BR002.
Integrated Architecture Tools The Integrated Architecture tools can help you plan and configure a system, as
well as migrate system architectures. For more information, go to: http://
www.rockwellautomation.com/rockwellautomation/products-technologies/
integrated-architecture/tools/overview.page?
Additional Resources These documents contain additional information concerning related products
from Rockwell Automation.
You can view or download publications at
http://www.rockwellautomation.com/global/literature-library/overview.page.
To order paper copies of technical documentation, contact your local
Allen-Bradley distributor or Rockwell Automation sales representative.
Resource Description
High Resolution Analog I/O Modules User Manual,
publication 1756-UM540
Describes how to install, configure, and troubleshoot high
resolution ControlLogix analog I/O modules.
ControlLogix Analog I/O Modules User Manual,
publication 1756-UM009
Describes how to install, configure, and troubleshoot a
ControlLogix analog I/O module.
Industrial Automation Wiring and Grounding
Guidelines, publication 1770-4.1
Provides general guidelines for installing a Rockwell
Automation industrial system.
Product Certifications website, http://
www.rockwellautomation.com/global/certification/
overview.page
Provides declarations of conformity, certificates, and other
certification details.

6Rockwell Automation Publication 1756-RM011A-EN-P - June 2016
Preface
Notes:

Rockwell Automation Publication 1756-RM011A-EN-P - June 2016 7
Chapter 1
Replacement Considerations
6- and 8-Channel Modules This manual refers to 6-channel and 8-channel modules. The 6-channel
modules can refer to the following:
• 1756-IF6CIS
• 1756-IF6I
• 1756-IR6I
• 1756-IT6I
• 1756-IT6I2
• 1756-OF6CI
• 1756-OF6VI
The 8-channel modules can refer to the following:
• 1756-IF8I
• 1756-IRT8I
• 1756-OF8I
Product Comparison
Topic Page
6- and 8-Channel Modules 7
Product Comparison 7
Wiring 8
Characteristic Replacement Product Original Product
8-point general purpose isolated
analog current/voltage input
module.
1756-IF8I 1756-IF6CIS
1756-IF6I
8-point isolated combined
temperature and mV sensing input
module.
1756-IRT8I 1756-IR6I
1756-IT6I
1756-IT6I2
8-point general purpose isolated
analog current/voltage output
module.
1756-OF8I 1756-OF6CI
1756-OF6VI

8Rockwell Automation Publication 1756-RM011A-EN-P - June 2016
Chapter 1 Replacement Considerations
Wiring While this document covers the ease of replacement from a 6- to 8- channel
module from a programming standpoint a user must still make changes to the
physical system due to differences across all modules RTBs.
Wiring with 1492 Analog Interface Modules
The 8-channel modules use different RTBs than their predecessors. This
means that the wiring and terminals used are different across the various
modules. There are various 1492 wiring solutions available for the 8-channel
modules.
If your existing 6-channel application is already wired using a 1492-AIFMxxx
interface module, then you may be able to convert to a new analog module by
replacing the 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. Attached to the terminal block, you would
have a 1492-ACABLExxxY cable. You could replace the 1756-IF6I module
with a 1756-IF8I module, keep all wires intact to the 1492-AIFM6S-3
terminal block, remove the 1492-ACABLExxxY cable, and replace it with a
1492-ACABLExxxYB cable. The new cable is configured to adjust the current
6-channel field wiring into the appropriate terminals on the new 8-channel
module. Then you would be finished with minimal cost and effort.
Tab le 1 shows available 1492 catalog numbers for 8-channel analog modules
used in existing 6-channel applications that are already using a 1492-AIFMxxx
terminal block.
Table 1 - Backwards Compatible 8-Channel Analog Matrix (New PLC Card to Old IFM)
Current 6-Channel I/O Card New 8-Channel
I/O Card
Current6-Channel
IFM
New Cable Catalog
Number(1)
(1) Add the appropriate length code to the end of the cable catalog number. The choices include 0.5 M cable with that catalog
number 005, 1.0 M cable (010), 2.5 M cable (025), and 5.0 M cable (050). Custom Length cables are also available on
www.ab.com.
1756-IF61 Current 1756-IF8I 1492-AIFM6S-3 1492-ACABLExxxYA
1756-OF6CI Current 1756-OF8I 1492-AIFM6S-3
1756-IF61 Voltage 1756-IF8I 1492-AIFM6S-3 1492-ACABLExxxYB
1756-OF6CI Voltage 1756-OF8I 1492-AIFM6S-3
1756-IT6I Thermocouple 1756-IR8TI 1492-AIFM6TC-3 1492-ACABLExxxYC
1756-IT6I2 Thermocouple 1756-IR8TI 1492-AIFM6TC-3
1756-IF6CIS Internal Loop Power 1756-IF8I 1492-AIFM6S-3 1492-ACABLExxxYD
1756-IF6CIS External Loop Power 1756-IF8I 1492-AIFM6S-3 1492-ACABLExxxYE
1756-IR6I RTD 1756-IR8TI 1492-AIFM6S-3 1492-ACABLExxxYF

Rockwell Automation Publication 1756-RM011A-EN-P - June 2016 9
Replacement Considerations Chapter 1
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.

10 Rockwell Automation Publication 1756-RM011A-EN-P - June 2016
Chapter 1 Replacement Considerations
Notes: