Rockwell Automation 1768-CNxxx User Manual
Installation Instructions
ControlNet Modules
Catalog Numbers 1756-CN2, 1756-CN2R, 1756-CN2RK, 1756-CN2RXT, 1756-CNB, 1756-CNBR, 1768-CNB, 1768-CNBR
Important User Information
IMPORTANT
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.
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.
Identifies information that is critical for successful application and understanding of the product.
Labels may also be on or inside the equipment to provide specific precautions.
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).
Allen-Bradley, CompactLogix, CompactLogix-XT, ControlFLASH, ControlLogix-XT, ControlLogix, FLEX I/O-XT, Logix5000, Logix-XT, RSLinx, R SLogix, R SNetWorx, Rockwell Soft ware, Rockwell Automation,
RSLogix 5000 , RSLinx Classic, RSNetWorx for ControlNet, and Studio 5000 are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
Summary of Changes
This manual contains new and updated information. Changes throughout this
revision are marked by change bars, as shown to the right of this paragraph.
New and Updated Information
This table contains the changes made to this revision.
Top ic Pag e
Updated art work to illu strate module redesign Throughout
document
Updated EDS file and firmware download procedures Chapters 1, 2, and 3
Updated 1756 status indicators Appendix A
Rockwell Automation Publication CNET-IN005C-EN-P - July 2014 3
Summary of Changes
Notes:
4 Rockwell Automation Publication CNET-IN005C-EN-P - July 2014
Table of Contents
Preface
Install a 1756 ControlNet
Communication Module
Studio 5000 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 1
ControlLogix-XT Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
ControlLogix-XT with Traditional ControlLogix Components. . 11
Redundant Media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Installation Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Determine Module Slot Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Set the Node Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Install the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Connect the Module to a ControlNet Network . . . . . . . . . . . . . . . . . . . . 15
Remove the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Reset the Module to the Original Factory Settings. . . . . . . . . . . . . . . 18
Keeper Configuration—Automatic Keeper Crossload . . . . . . . . . . . 18
Install the EDS File and Get Firmware Updates. . . . . . . . . . . . . . . . . . . . . 19
Download the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Connect a Programming Terminal to the Network
with a 1786-CP Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Connect to the Module via the USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Install a 1768 ControlNet
Communication Module
Redundant Media
Chapter 2
Redundant Media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Installation Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Grounding Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Set the Node Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Install the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
If You Use Screws to Mount the Module . . . . . . . . . . . . . . . . . . . . . . . 26
Mount on a DIN Rail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Connect the Module to a ControlNet Network . . . . . . . . . . . . . . . . . . . . 28
Remove the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Install the EDS File and Get Firmware Updates. . . . . . . . . . . . . . . . . . . . . 31
Download the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Chapter 3
Use Redundant Media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Rockwell Automation Publication CNET-IN005C-EN-P - July 2014 5
Table of Contents
Appendix A
1756 ControlNet Status Indicators
USB Communication
1768 ControlNet Module Status
Indicators
Index
Status Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Interpret the OK Status Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Interpret the Network Channel Status Indicators . . . . . . . . . . . . . . . 38
1756-CN2, 1756-CN2R,
1756-CN2RXT, and
1756-CN2RK ControlNet Communication Modules. . . . . . . . . . . . . . . 38
OK Status Indicator and Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Network Channel Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
1756-CNB/E and
1756-CNBR/E ControlNet Communication Modules. . . . . . . . . . . . . . 43
OK Status Indicator and Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Network Channel Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Appendix B
Set Up a USB Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Appendix C
1768-CNB and 1768-CNBR ControlNet Modules . . . . . . . . . . . . . . . . . 51
OK Status Indicator and Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Network Channel Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6 Rockwell Automation Publication CNET-IN005C-EN-P - July 2014
Preface
This manual describes how to install and start up ControlNet modules with
Logix5000 ™ controllers.
You should use this manual if you program applications that use the ControlNet
network with one of these Logix5000 controllers:
™
• CompactLogix
• ControlLogix
You should also understand the following:
• Networking concepts
• How to the use Studio 5000
• How to use RSLinx
®
™
environment
®
Classic programming software
Studio 5000 Environment
The Studio 5000 Automation Engineering and Design Environment combines
engineering and design elements into a common environment. The first element
in the Studio 5000 environment is the Logix Designer application. The Studio
™
5000 Logix Designer application is the rebranding of RSLogix
5000 software
and continues to be the product to program Logix5000 controllers for discrete,
process, batch, motion, safety, and drive-based solutions.
The Studio 5000 environment is the foundation for the future of Rockwell
Automation
engineering design tools and capabilities. This environment is the
one place for design engineers to develop all of the elements of their control
system.
Rockwell Automation Publication CNET-IN005C-EN-P - July 2014 7
Preface
Additional Resources
These documents contain additional information concerning related products
from Rockwell Automation.
Resource Description
ControlNet Network Configuration User Manual,
publication CNET-UM001
ControlNet Coax Media Planning and Installation Guide,
publication CNET-IN002
ControlNet Standard and High-flex Coax Cable Installation
Instructions, publication 1786-IN009
Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1
Product Certifications website, http://www.ab.com Provides declarations of conformity, certificates, and other
Provides details about how to use ControlNet
communication modules with Logix5000
controllers and communicate with other devices
on the ControlNet network.
Describes the required components of a ControlNet coax
media system.
Provides application information you need to consider
when you install standard RG-6 (catalog number
1786-RG6/A) and high-flex RG-6 (catalog number
1786-RG6F/A) coax cable in your ControlNet network.
Provides general guidelines for installing a Rockwell
Automation industrial system.
certification details.
You can view or download publications at
http:/www.rockwellautomation.com/literature/
. To order paper copies of
technical documentation, contact your local Allen-Bradley distributor or
Rockwell Automation sales representative.
8 Rockwell Automation Publication CNET-IN005C-EN-P - July 2014
Chapter 1
Install a 1756 ControlNet Communication
Module
Top ic Pa ge
ControlLogix-XT Systems 11
Redundant Media 12
Installation Summary 12
Determine Module Slot Location 12
Set the Node Address 13
Install the Module 14
Connect the Module to a ControlNet Network 15
Remove the Module 17
Install the EDS File and Get Firmware Updates 19
Connect a Programming Terminal to the Network with a 1786-CP Cable 20
Connect to the Module via the USB Port 21
ATTENTION: Environment and Enclosure
This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as
defined in IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is not intended for use in residential environments and may not provide adequate protection to radio
communication services in such environments.
This equipment is supplied as open-type equipment. It must be mounted within an enclosure that is suitably designed for those
specific environmental conditions that will be present and appropriately designed to prevent personal injury resulting from
accessibility to live parts. The enclosure must have suitable flame-retardant properties to prevent or minimize the spread of flame,
complying with a flame spread rating of 5VA or be approved for the application if nonmetallic. The interior of the enclosure must
be accessible only by the use of a tool. Subsequent sections of this publication may contain additional information regarding
specific enclosure type ratings that are required to comply with certain product safety certifications.
In addition to this publication, see the following:
• Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1
, for additional installation requirements.
• NEMA Standard 250 and IEC 60529, as applicable, for explanations of the degrees of protection provided by enclosures.
Rockwell Automation Publication CNET-IN005C-EN-P - July 2014 9
Chapter 1 Install a 1756 ControlNet Communication Module
North American Hazardous Location Approval
The following information applies when operating this equipment in
hazardous locations.
Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for use in Class I Division 2 Groups
A, B, C, D, Haza rdous Locations a nd nonhazardous locations only. Each product is supplied
with markings on the rating nameplate indicating the hazardous location temperature
code. When combining products within a system, the most adverse temperature code
(lowest "T" number) may be used to help determine the overall temperature code of the
system. Combinations of equipment in your system are subject to investigation by the
local Authority Having Jurisdiction at the time of installation.
Informations sur l’utilisation de cet équipement en environnements
dangereux.
Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne conviennent qu'à une utilisation en
environnements de Classe I Division 2 Groupes A, B, C, D dangereux et non dangereux.
Chaque produit est livré avec des marquages sur sa plaque d'identification qui indiquent
le code de température pour les environnements dangereux. Lorsque plusieurs produits
sont combinés dans un système, le code de température le plus défavorable (code de
température le plus faible) peut êt re utilisé pour déterminer le code de température
global du système. Les combinaisons d'équipements dans le système sont sujettes à
inspection par les autorités locales qualifiées au moment de l'installation.
WARNING: EXPLOSION HAZARD
• Do not disconnect equipment unless power has
been removed or the area is known to be
nonhazardous.
• Do not disconnect connections to this
equipment unless power has been removed or
the area is known to be nonhazardous. Secure
any external connections that mate to this
equipment by using screws, sliding latches,
threaded connectors, or other means provided
with this product.
• Substitution of components may impair
suitability for Class I, Division 2.
• If this product contains batteries, they must only
be changed in an area known to be
nonhazardous.
European Hazardous Location Approval
The following applies when the product bears the Ex Marking.
This equipment is intended for use in potentially explosive atmospheres as defined by European Union Directive 94/9/EC and has been found to comply with the Essential Health and
Safety Requirements relating to the design and construction of Category 3 equipment intended for use in Zone 2 potentially explosive atmospheres, given in Annex II to this Directive.
Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 60079-15 and EN 60079-0.
WARNING: RISQUE D’EXPLOSION
• Couper le courant ou s'assurer que
l'environnement est classé non dangereux avant
de débrancher l'équipement.
• Couper le courant ou s'assurer que
l'environnement est classé non dangereux avant
de débrancher les connecteurs. Fixer tous les
connecteurs externes reliés à cet équipement à
l'aide de vis, loquets coulissants, connecteurs
filetés ou autres moyens fournis avec ce produit.
• La substitution de composants peut rendre cet
équipement inadapté à une utilisation en
environnement de Classe I, Division 2.
• S'assurer que l'environnement est classé non
dangereux avant de changer les piles.
WARNING:
• This equipment must be installed in an enclosure providing at least IP54 protection when applied in Zone 2 environments.
• This equipment shall be used within its specified ratings defined by Rockwell Automation.
• Provision shall be made to prevent the rated voltage from being exceeded by transient disturbances of more than 40% when
applied in Zone 2 environments.
• This equipment must be used only with ATEX certified Rockwell Automation backplanes.
• Secure any external connections that mate to this equipment by using screws, sliding latches, threaded connectors, or other means
provided with this product.
• Do not disconnect equipment unless power has been removed or the area is known to be nonhazardous.
ATTENTION: This equipment is not resistant to sunlight or other sources of UV radiation.
10 Rockwell Automation Publication CNET-IN005C-EN-P - July 2014
Install a 1756 ControlNet Communication Module Chapter 1
IMPORTANT
ATTENTION: Prevent Electrostatic Discharge
This equipment is sensitive to electrostatic discharge, which can cause internal damage and affect normal operation. Follow these
guidelines when you handle this equipment:
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in use.
ATTENTION: Personnel responsible for the application of safety-related programmable electronic systems (PES) shall be aware
of the safety requirements in the application of the system and shall be trained in using the system.
ControlLogix-XT Systems
The ControlLogix-XT™ products include control and communication system
components that, when used with FLEX I/O-XT™ products, provide a complete
control system solution that can be used in environments where temperatures
range from -20…70 °C (-4…158 °F).
When used independently, the ControlLogix-XT system can withstand
environments where the temperature ranges from -25…70 °C (-13…158 °F).
ControlLogix-XT with Traditional ControlLogix Components
ControlLogix-XT system components are rated for extreme
environmental conditions only when used properly with other LogixXT system components. The use of ControlLogix-XT components with
traditional ControlLogix system components nullifies extreme-environment
ratings.
If a ControlLogix-XT module is used with traditional ControlLogix products that
are not designed for extreme environments, the ControlLogix-XT module can
withstand only the environments specified for the traditional ControlLogix
version of the module. For example, if a 1756-CN2RXT module is used in a
traditional 1756-A10 chassis, the 1756-CN2RXT module can withstand only the
environment specified for the traditional 1756-CN2R module.
The ControlLogix-XT system components are designed to meet the same and
greater operational and environmental requirements as traditional
ControlLogix products.
When a ControlLogix-XT component is used as a replacement for a traditional
ControlLogix component, the functional and environmental requirements of
the traditional ControlLogix component apply.
Rockwell Automation Publication CNET-IN005C-EN-P - July 2014 11
Chapter 1 Install a 1756 ControlNet Communication Module
1
4
5
6
2
3
Item Description
1Power supply
2 Chassis
3Slot 0
4Slot 1
5Slot 2
6Slot 3
20806
Redundant Media
Installation Summary
These 1756 ControlNet bridge modules have two ControlNet ports to support
redundant media:
• 1756-CN2R
• 1756-CNBR
• 1756-CN2R
• 1756-CN2RXT
• 1756-CN2RK
For information about using these modules with redundant media, see
Redundant Media on page 33
.
To install a communication module in a 1756 ControlLogix chassis, complete
these steps.
1. Determine Module Slot Location
2. S
et the Node Address.
3. Install the Module
.
4. Connect the Module to a ControlNet Network
.
.
Determine Module Slot Location
5. Remove the Module
6. Install the EDS File and Get Firmware Updates
7. C
onnect a Programming Terminal to the Network with a 1786-CP Cable.
8. Connect to the Module via the USB Port
.
.
.
Install the communication module in any slot in the ControlLogix chassis. You
can install multiple communication modules in the same chassis. This example
shows chassis slot numbering in a 4-slot chassis. Slot 0 is the first slot and is always
the leftmost slot in the rack.
12 Rockwell Automation Publication CNET-IN005C-EN-P - July 2014
Install a 1756 ControlNet Communication Module Chapter 1
Slot 0
Slot 1
Slot 2
Slot 3
Slot 4
Side of Module
Front of Module
This module’s node address is 23
This example shows chassis slot numbering in a ControlLogix-XT chassis.
Set the Node Address
Use a small screwdriver to set the module’s node address switches. You must
specify a unique ControlNet node address. You can select an address of 01…99.
Address 00 is an invalid ControlNet node address.
32462-M
Rockwell Automation Publication CNET-IN005C-EN-P - July 2014 13
Chapter 1 Install a 1756 ControlNet Communication Module
32463-M
Circuit
Board
Install the Module
WARNING: When you insert or remove the module while backplane power is
on, an electrical arc can occur. This could cause an explosion in hazardous
location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.
Repeated electrical arcing causes excessive wear to contacts on both the module
and its mating connector. Worn contacts may create electrical resistance that can
affect module operation.
To install the module, follow this procedure.
1. Align the circuit board with the top and bottom guides in the chassis.
2. Slide the module into the chassis making sure the module backplane
connector properly connects to the chassis backplane.
The module is properly installed when it is flush with the power supply or
other installed modules.
ATT EN TI ON : Do not force the module into the backplane connector. If you
cannot seat the module with firm pressure, check the alignment. Forcing the
module into the chassis can damage the backplane connector or the module.
14 Rockwell Automation Publication CNET-IN005C-EN-P - July 2014
Install a 1756 ControlNet Communication Module Chapter 1
1756-CN2R Module in a
1756-A4 Chassis
ControlNet Node
Redundant Media
(Opt ional )
ControlNet Node
ControlNet Link
TIP
Connect the Module to a ControlNet Network
You can connect the module to the ControlNet network by using a tap, catalog
numbers 1786-TPR, 1786-TPS, 1786-TPYR, 1786-TPYS, or 1786-TCT2BD1.
WARNING: If you connect or disconnect the communication cable with power
applied to this module or any device on the network, an electrical arc can occur.
This could cause an explosion in hazardous location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.
WARNING: Do not use the USB port in hazardous locations.
ATTENTION: The USB port is intended only for temporary local programming
purposes and is not intended for permanent connection. The USB cable is not to
exceed 3.0 m (9.84 ft) and must not contain hubs.
This example shows a ControlNet network using redundant media.
For network connections, we recommend taps with a straight connector
(catalog number 1786-TPS or 1786-TPYS) because of the location of the BNC
connectors on the bottom of the module.
Rockwell Automation Publication CNET-IN005C-EN-P - July 2014 15
Chapter 1 Install a 1756 ControlNet Communication Module
IMPORTANT
Tru nkl ine A
Tru nkl ine B
1756-CN2 Trunkline A
1756-CN2R Trunklines A and B
Dust Cap
Dust Cap
32464
Nonredundant Media
Redundant Media
Tap
Tap
Tap
Network
Network
To connect the module to the network with a tap, perform this procedure.
1. Remove and save the dust caps from the ControlNet taps.
ATTENTION: Do not allow any metal portions of the tap to contact any
conductive material. If you disconnect the tap from the module, place
the dust cap back on the straight or right-angle connector to prevent
the connector from accidentally contacting a metallic grounded surface.
2. Connect the tap’s straight or right-angle connector to the module’s BNC
connector.
If your network supports Then connect the tap’s connector
Nonredundant media
(all 1756-CNx modules)
Redundant media
(1756-CNBR, 1756-CN2R, 1756-CN2RXT,
and 1756-CN2RK modules)
From trunkline A to channel A on the module.
From trunkline A to channel A on the 1756-CN2R module.
From trunkline B to channel B on the 1756-CN2R module.
To avoid accidentally reversing the tap connections, before making your
connection, check the tap drop cable for the label indicating the attached
segment. Accidental connection reversals produce incorrect status displays and
require troubleshooting.
3. Apply power to the module and check the status indicators to determine
whether the power supply and module are operating properly.
For more information about status indicators, see 1756 ControlNet Status
Indicators on page 37.
16 Rockwell Automation Publication CNET-IN005C-EN-P - July 2014
Install a 1756 ControlNet Communication Module Chapter 1
X
T
Remove the Module
You can install or remove this module while chassis power is applied.
WARNING: When you insert or remove the module while backplane power is
on, an electrical arc can occur. This could cause an explosion in hazardous
location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.
Repeated electrical arcing causes excessive wear to contacts on both the module
and its mating connector. Worn contacts may create electrical resistance that can
affect module operation.
To remove or replace the module, use this procedure.
1. Push on the upper and lower module tabs to disengage them.
2. Slide the module out of chassis.
The figure shows the removal of a 1756-CN2RXT module.
Rockwell Automation Publication CNET-IN005C-EN-P - July 2014 17
Chapter 1 Install a 1756 ControlNet Communication Module
IMPORTANT
IMPORTANT
Reset the Module to the Original Factory Settings
If you are using a 1756-CN2, 1756-CN2R, 1756-CN2RXT or 1756-CN2RK
communication module, you can reset the module to its original settings and
clear all keeper information.
To reset a module to its factory settings, complete these steps.
1. Remove power from the chassis.
Removing power from the chassis before removing the module is only
necessary if the module is in a Class I, Division 2 hazardous location.
2. Remove the module from the chassis.
3. Reset the switches to 00.
Do not use the 00 switch setting during normal module operation.
4. Replace the module in the chassis.
5. Apply power to the chassis.
6. After the module status display reads ‘Reset Complete—Change Switch
Settings’, remove power from the chassis.
7. Remove the module from the chassis.
8. Set the switches to their final value.
9. Replace the module in the chassis.
10. Apply power to the chassis.
Keeper Configuration—Automatic Keeper Crossload
The 1756-CN2, 1756-CN2R, 1756-CN2RXT, and 1756-CN2RK
communication modules are keeper capable modules. If a keeper capable module
has a valid configuration and has the lowest address among the keeper capable
nodes on the network, it becomes the active keeper. The active keeper is the node
that distributes network configuration information to other nodes as the
network is formed or as nodes are added to the network.
When the module is first removed from the box or is reset to the original factory
settings, it will automatically attempt to crossload configuration information
from the current active keeper. If an active keeper with a valid network
configuration is present on the active network, the configuration crossload will
succeed. No user intervention is needed. However, if an active keeper does not
exist or does not have a valid network configuration, you must use RSNetWorx
for ControlNet software to download the network configuration information.
18 Rockwell Automation Publication CNET-IN005C-EN-P - July 2014
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