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:

Rockwell Automation Publication 1756-RM011A-EN-P - June 2016 11
Chapter 2
Emulation Mode
Emulation Mode Overview The 8-channel modules that are discussed in the manual refer to any 8-channel
module at firmware revision 2.011 or later. Firmware revision 2.011 and later
supports Emulation mode. This mode allows an 8-channel module to be
configured, return input data and accept output data that acts as if it were a 6-
channel module.
In Emulation mode, when a forward open containing configuration data is sent
to the 8-channel module it can accept it and respond as if it were a 6-channel
module. After the connection is established, all data (input/output) will be
sent to or from the controller in the same format and tag structures as a 6-
channel module. You can directly replace a 6-channel module with an 8-
channel module with no I/O tree modifications or program changes with this
method.
When the 8-channel module receives configuration data for a 6-channel
module, it takes that information and formats it to replicate the configuration
data of an 8-channel module. The 8-channel module then scans its 8-channel
module firmware but reformats all input or output data to match the 6-channel
module.
Additionally, the 8-channel module is internally behaving as an 8-channel
module because most of the firmware has not changed. The difference in 8-
channel module firmware is that in Emulation mode configuration, input data,
and output data is reformatted to match the appropriate 6-channel module.
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 (Figure 1) still sends data in the
1756-IF6I format, but firmware internally moves data to the 1756-IF8I format
(Figure 2). An 8-channel module still behaves as an 8-channel module, but
accepts a 6-channel module format.
Topic Page
Emulation Mode Overview 11
Emulation Mode Differences 13

12 Rockwell Automation Publication 1756-RM011A-EN-P - June 2016
Chapter 2 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 13
Emulation Mode Chapter 2
Emulation Mode Differences The following is a list of differences resulting from using an 8-channel module
to emulate a 6-channel module.
Input Ranges
The input ranges are slightly different on the 8-channel modules resulting in
differing overrange/underrange trip channels that usually denote wire off.
Output Ranges
The output ranges are slightly different on the 8-channel modules resulting in
differing output limits.
Table 2 - Input Range Emulation Differences
Module Input Range 6-Channel
Underrange
6-Channel
Overrange
Emulation
Underrange
Emulation
Overrange
1756-IF6I +/- 10V -10.54688 10.54688 -10.50(1)
(1) Emulation in these values is limited compared to the 6-channel modules.
10.50(1)
0…10V 0.00 10.54688 0.00 10.50(1)
0…5V 0.00 5.27344 0.00 5.25(1)
0…20mA 0.00 21.09376 0.00 21.00(1)
1756-IF6CIS 0…20mA 0.00 21.44622 0.00 21.00(1)
1756-IR6I 1…487 Ohms 0.859068 507.86211 0.00 510.00
2…1000 Ohms 2.00 1016.50237 0.00 1020.00
4…2000 Ohms 4.00 2033.77999 0.00 2040.00
8…4000 Ohms 8.00 4068.39211 0.00 4080.00
1756-IT6I -12…30mV -15.80323 31.39626 -101.00 101.00
1756-IT6I2 -12…78mV -15.15836 79.24062 -101.00 101.00
Table 3 - Output Range Emulation Differences
Module Output Range 6-Channel
Underrange
6-Channel
Overrange
Emulation
Underrange
Emulation
Overrange
1756-OF6CI 0…20mA 0.00 21.07435 0.00 21.00(1)
1756-OF6VI +/- 10V -10.5172 10.5172 -10.50(1)
(1) Emulation in these values is limited compared to the 6-channel modules.
10.50(1)

14 Rockwell Automation Publication 1756-RM011A-EN-P - June 2016
Chapter 2 Emulation Mode
Notes:

Rockwell Automation Publication 1756-RM011A-EN-P - June 2016 15
Chapter 3
Hardware Specifications and Considerations
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.
Calculate the expected backplane current of an 8-channel module before
replacing a 6-channel module to ensure you are within the limits of your power
supply.
Backplane Current Draw at 5.1V
All 8-channel modules are equal to or less than the 5.1V current draw of their
6-channel counterpart, therefore there are no issues at 5.1V.
Backplane Current Draw at 24V
All 8-channel modules require more current at 24V than their 6-channel
counterpart, therefore you must recalculate the load on your power supply to
be sure you are within limits.
Topic Page
Backplane Power 15
Calibration 16
RPI and RTS Values of 6- Channel vs. 8- Channel Modules 16
Cold Junction Compensation on Thermocouple Modules 17
Using an External Loop Supply with the 1756-IF6CIS 17

16 Rockwell Automation Publication 1756-RM011A-EN-P - June 2016
Chapter 3 Hardware Specifications and Considerations
Calibration All 8-channel modules use precise analog components that maintain their
specifications over time. The modules are calibrated at the factory and
recalibration is not required.
If you want to calibrate an 8-channel module in 6-channel Emulation mode,
the calibration cannot be performed using the 6-channel module profile. The
recommended way to calibrate the 8-channel module would be to temporarily
relocate the module to a test bench, recalibrate it, and then return the module
to the desired slot.
If you have any program code to facilitate the calibration of a 6-channel
module, that code will no longer function. If you were to select the Calibration
tab of a 6-channel module, they would most likely get an error similar to
Figure 3. This error will not harm the application.
Figure 3 - Module Error Message
RPI and RTS Values of
6-channel versus 8-channel
Modules
The rate at which all 6-channel modules send or receive data is determined by a
combination of RTS (Real-Time Sample) and RPI (Requested Packet
Interval). Depending on the settings of these two parameters, the 6-channel
module behaves a certain way when sending input data to the controller. When
an 8-channel module is in Emulation mode, inputs are sampled at the faster of
the configured RPI and RTS. This maintains the fastest production time for
the user, but can change the exact sampling behavior depending on precise user
configuration. Adjustments would need to be made to the RPI or RPS to
maintain exact data update rates if this change occurred.
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. The 1756-IF8I examines the 25 ms RPI and the 50 ms RTS and
scans the inputs using the faster of the two, which in this case, would be 25 ms.
Therefore the 6-channel module was scanning the inputs at a 50 ms rate, but
the 8-channel module is scanning inputs at a 25 ms rate. It is up to the user to
determine if any adjustments in RTS and RPI are needed. In most cases, no
changes are necessary. However, if analog input data is being supplied to a
sensitive PID loop, you can make adjustments to accommodate.

Rockwell Automation Publication 1756-RM011A-EN-P - June 2016 17
Hardware Specifications and Considerations Chapter 3
In general, if in the 6-channel module RPI is less than RTS, adjustments can be
made in the 6-channel Emulation module configuration to achieve the same
performance. Keep in mind that if RPI is less than RTS your performance in
Emulation mode is faster than it was as a 6-channel module.
In general, if in the 6-channel module RPI is greater than RTS then no
adjustments are necessary in the 6-channel Emulation module configuration to
achieve the same performance.
Cold Junction Compensation
on Thermocouple Modules
ControlLogix® thermocouple modules use cold junction compensation (CJC)
sensors. You must order the senors separately by ordering catalog number
1756-CJC, which consists of two CJC jumpers.
All CJCs for all 1756 Rockwell Automation® thermocouple modules are
electrically the same. The modules use a precision thermistor, but not all CJCs
can physically fit in all RTBs so you cannot substitute different CJCs from
different modules.
If you are using a 1756-IT6I or 1756-IT6I2 module with thermocouples and
are not using Remote CJC Compensation, be sure to order a 1756-CJC sensor
for the 1756-IRT8I RTB. The1771 thermocouple modules do not always use a
CJC resistor that is electrically compatible with 1756 modules.
Using an External Loop
Supply with the
1756-IF6CIS Module
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
eliminating the need for an external loop supply. While the 1756-IF6CIS
module typical case can be to supply loop power, the 1756-IF6CIS module can
still be used with an external loop supply on one or more channels. If one or
more of your 1756-IF6CIS channels uses an external loop supply, then you
must add some additional logic to your program to accommodate those
channels with an external loop supply.
IMPORTANT If you change the RPI of an 8-channel module on a ControlNet network, you
need to reschedule the network, which requires that the process be placed in
Program mode.

18 Rockwell Automation Publication 1756-RM011A-EN-P - June 2016
Chapter 3 Hardware Specifications and Considerations
All 1756-IF6CIS channels are supplying loop power
If all RTB VOUT-x terminals are used and all RTB RTN-x terminals are
unused then all channels of the 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.
If Floating Point Configuration: Communication Format is Float Data or CST Time Stamped
Float Data
Set the ChxConfig.TenOhmOffset configuration tag to a non-zero value for
each channel that uses an external loop power source. This tag was previously
ignored by the 1756-IF6CIS module.

Rockwell Automation Publication 1756-RM011A-EN-P - June 2016 19
Hardware Specifications and Considerations Chapter 3
If Integer Configuration: Communication Format is Integer Data or CST Timestamped Integer
Data
Set bit 7 of the channels ChxRangeNotch configuration tag for each channel
that uses an external loop power source. This bit was previously ignored by the
IF6CIS.
IMPORTANT For a Communication Format of CST Timestamped Integer Data or Integer
Data:
If you change anything on the IF6CIS Configuration Tab and hit apply, it is
possible that the IF6CIS will not see the ChxRangeNotch bit 7 as set. To
remedy this, you must do one of the following: RIUP the module, issue a
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. Be sure to verify that
this specification difference does not conflict with your end device to avoid
damage to the device.

20 Rockwell Automation Publication 1756-RM011A-EN-P - June 2016
Chapter 3 Hardware Specifications and Considerations
Notes: