EasyManuals Logo

Allen-Bradley 1756-CNB User Manual

Allen-Bradley 1756-CNB
186 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #174 background imageLoading...
Page #174 background image
Publication 1756-UM523F-EN-P - December 2006
174 Series B ControlNet Bridge Modules
The loss of communication happens on the first switchover after you
download the project to the redundant controller.
You lose communication with the remote chassis and any
devices to which you were bridging via the chassis, such as the
remote I/O modules.
During the communication loss, the I/O modules go to their
configured state for a communication fault.
The communication loss is temporary. Communications restore
themselves.
To prevent this situation, use series D or series E ControlNet Bridge
modules.
Communication Stoppage
While Using a Series B
ControlNet Bridge Module
All communication on a ControlNet network could stop if the lowest
node is a 1756-CNB/B or 1756-CNBR/B module. This happens if you
unplug or break the tap of the module while it is turned on.
Module Corrective Action
To prevent this situation, use series D or series E ControlNet Bridge
modules.
If Then
Tap of a series B ControlNet Bridge module
becomes unplugged or broken
1. Turn off the power to the module.
2. Replace the tap.
3. Turn on the power to the module.
Communication on the network stops
because of an unplugged or broken tap
Cycle power to each primary controller on
the network.

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Allen-Bradley 1756-CNB and is the answer not in the manual?

Allen-Bradley 1756-CNB Specifications

General IconGeneral
BrandAllen-Bradley
Model1756-CNB
CategoryControl Systems
LanguageEnglish

Related product manuals