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Rockwell Automation
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1756-CN2
User Manual
36 pgs969.87 Kb1
Table of contents
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Rockwell Automation 1756-CN2, 1756-CN2R User Manual

Installation Instructions
ControlLogix ControlNet Interface Module
Catalog Numbers 1756-CN2, 1756-CN2R, Series B
Top ic Page
Important User Information 2 European Hazardous Location Approval 3 North American Hazardous Location Approval 4 Environment and Enclosure 5 Prevent Electrostatic Discharge 5 The ControlNet Interface Module and Redundant Media 6
Understanding Standalone and Redundant Control 6 Example Redundant System 7
Before You Begin 8
Parts List 8 Identify Module Features 9 Set the Module’s Network Address Switches 10 Reset the Module to the Original Factory Settings 10 Keeper Configuration - Automatic Keeper Crossload 11 Prepare the Chassis for Module Installation 12 Determine Module Slot Location 12
Install the Module 13
Connect the Module to the Network 14 Remove the Module 18 Install or Remove the Module Under Power 18 Install the EDS File 19
Configure RSLinx Software to Use the USB Port 20
Set Up the USB Driver 21
Status Indicators 22
Module Status Indicator and Display 23
ControlNet Channel Status Indicators 29 Specifications 31 Additional Resources 35

Important User Information

Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (Publication SGI-1.1 available from your local Rockwell Automation sales office or online at http://literature.rockwellautomation.com equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.
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.
) describes some important differences between solid state
IMPORTANT
ATTENTION
SHOCK HAZARD
BURN HAZARD
Publication
Identifies information that is critical for successful application and understanding of the product.
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 consequences.
Labels may be on or inside the equipment (for example, drive or motor) to alert people that dangerous voltage may be present.
Labels may be on or inside the equipment (for example, drive or motor) to alert people that surfaces may reach dangerous temperatures.
1756-IN607A-EN-P - February 2008
ControlLogix ControlNet Interface Module 3

European Hazardous Location Approval

European Zone 2 Certification (The following applies when the product bears the EEx Marking.) This equipment is intended for use in potentially explosive atmospheres as defined
by European Union Directive 94/9/EC. The Laboratoire Central des Industries Electriques (LCIE) certifies that this equipment 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 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.
IMPORTANT
This equipment is not resistant to sunlight or other sources of UV radiation.
This equipment must be installed in an enclosure providing at least IP54 protection when applied in Class I, Zone 2 environments.
This equipment shall be used within its specified ratings defined by Allen-Bradley.
Provision shall be made to prevent the rated voltage from being exceeded by transient disturbances of more than 40% when applied in Class I, Zone 2 environments.
This equipment must be used only with ATEX certified backplanes.
Publication
1756-IN607A-EN-P - February 2008

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, Hazardous Locations and nonhazardous locations only. Each product is supplied with markings on the rating na meplate indicating the hazardous location temperature code. When combining products within a system, the most adverse temperature code (lowest "T" number) m ay 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 Authorit y Having Jurisdiction at the time of installation.
WARNING
EXPLOSION HAZARD -
• Do not disconnect eq uipment 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.
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 marqua ges sur sa plaque d'identification qui indiquent le code de température pour les environnement s dangereux. Lorsque plusieurs produits sont combinés dans un système, le code de température le plus défavorable (co de de température le plus faible) peut être utilisé pour déterminer le code de température global du système. Les comb inaisons d'équipements dans le système sont sujettes à inspection pa r les autorités locales qualifiées au moment de l'installation.
AVERTISSEMENT
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.
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1756-IN607A-EN-P - February 2008

Environment and Enclosure

ControlLogix ControlNet Interface Module 5
ATTENTION
This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC publication 60664-1), at altitudes up to 2000 meters (6562 feet) without derating.
This equipment is considered Group 1, Class A industrial equipment according to IEC/CISPR Publication 11. Without appropriate precautions, there may be potential difficulties ensuring electromagnetic compatibility in other environments due to conducted as well as radiated disturbance.
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, V2, V1, V0 (or equivalent) if non-metallic. 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:
Industrial Automation Wiring and Grounding Guidelines, for additional installation requirements, Allen-Bradley publication 1770-4.1.
NEMA Standards publication 250 and IEC publication 60529, as applicable, for explanations of the degrees of protection provided by different types of enclosure.

Prevent Electrostatic Discharge

ATTENTION
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.
For additional information, refer to Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1.
Publication
1756-IN607A-EN-P - February 2008
6 ControlLogix ControlNet Interface Module

The ControlNet Interface Module and Redundant Media

Use the 1756-CN2 ControlLogix ControlNet series B module if redundant media is not necessary. Applications requiring redundant media must use the 1756-CN2R module.

Understanding Standalone and Redundant Control

You can use the 1756-CN2R series B modules for standalone or redundant control. For standalone control, only one set of modules is required. For redundant control, two ControlLogix chassis are populated with identical pairs of modules called partners. The chassis that performs active control is called the primary chassis and the modules in the chassis are called primary modules. The other chassis is called the secondary chassis and the modules in the chassis are called secondary modules.
These installation instructions discuss both standalone and redundant control; read them carefully to distinguish the procedures and requirements for each type of control.
IMPORTANT
If you use redundant control, you must select the same ControlNet network address for each set of partner modules (primary and secondary). You must also place the partner modules in the same corresponding slots in their respective redundant-control chassis pair.
For more redundancy information, refer to the ControlLogix Redundancy System User Manual, publication 1756-UM523F.
Publication
1756-IN607A-EN-P - February 2008

Example Redundant System

ControlLogix ControlNet Interface Module 7
Redundant Control Chassis Pair
IMPORTANT
Primary Chassis
Secondary Chassis
Remote I/O Chassis
1756-RM Module
1756-CN2R Module
1756-RM Module
1756-CN2R Module
1756-CNB/CNBR
1756-CN2 Module 1756-CN2R Module
ControlNet Network
The 1756-CN2 and 1756-CN2R series B modules are supported in both the local chassis (primary and secondary) and the remote chassis (I/O chassis) of a ControlLogix redundancy system,
16.5x.
revision
Publication
1756-IN607A-EN-P - February 2008

Before You Begin

Before you install the module, make sure you know how to handle the module. Refer to Prevent Electrostatic Discharge on page 5.

Parts List

You need all of the components shown.
1756-CN2 or 1756-CN2R
Module
COAX
COAX
OK
A
OK
A
B
A
B
A
1756-A4, 1756-A7, 1756-A10, 1756-A13, or 1756-A17 Chassis
1756-PA72, 1756-PA75, 1756-PB72, or 1756-PB75
Power Supply
1786-TPR, 1786-TPS, 1786-TPYR, or 1786-TPYS Taps
(1)
USB Cable (optional)
-
(1)
1786-TPS or 1786-TPYS taps are recommended for network connections.
(2)
1756
-CN2 and 1756-CN2R, series
series B modules use a USB cable for temporary network connections.
Publication
1756-IN607A-EN-P - February 2008
A modules use the 1786-CP cable. However, 1756-CN2 and 1756-CN2R,
(2)
Small Screwdriver
ControlLogix ControlNet Interface Module 9

Identify Module Features

These are the hardware components of the 1756-CN2 and 1756-CN2R series B bridge modules.
Module Status Alphanumeric Display
ControlNet Channel Status Indicators
USB Port
Channel B BNC Connector (1756-CN2R only)
COAX
Front View
Module Status Indicator
Channel A BNC Connector
Network Address Switches (not shown) See page 10.
Side View
Backplane Connector
00 ­Factory Reset on Power Up (Invalid Network Address)
01 - 99 Normal Operation (Valid Network Address)
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1756-IN607A-EN-P - February 2008
10 ControlLogix ControlNet Interface Module

Set the Module’s Network Address Switches

Use a small screwdriver to set the module’s network address switches. For modules in a standalone chassis, you must specify a unique ControlNet network address. You can select an address of
01...99 for modules in a standalone chassis. Address 00 is an invalid ControlNet address.
Side of Module
Front of Module
Top of Module
This module’s network address is 23.

Reset the Module to the Original Factory Settings

To reset the module to its original settings and clear all keeper information (see page
IMPORTANT
The following procedure instructs you to remove power from the chassis before removing the module. This is only necessary if the module is in a Class I, Division 2 hazardous location. For more information, see Install or Remove the Module Under Power on page 18.
1. Remove power from the chassis.
11), complete the following steps.
2. Remove the module from the chassis.
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1756-IN607A-EN-P - February 2008
3. Reset the switches to 00.
ControlLogix ControlNet Interface Module 11
IMPORTANT
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 series B module is a keeper capable module. This means that, if the module has a valid configuration and has the lowest address among the keeper capable nodes on the network, it becomes the Master Keeper. The Master 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 Master Keeper. If a Master Keeper with a valid network configuration is present on the network, the configuration crossload will succeed; no user configuration is needed. However, if a Master Keeper does not exist, or does not have a valid network configuration, you must use RSNetWorx for ControlNet to download the network configuration information.
Publication
1756-IN607A-EN-P - February 2008
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