Allen-Bradley 1756-RM2 User Manual

40 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Chapter 2 Design an Enhanced Redundancy System
Reserve Consecutive Node Addresses for Partner Modules
Where ControlNet modules are used as partners in redundant chassis, plan
consecutive node numbers for those partnered modules. Plan for consecutive
node addresses because the redundant system automatically assigns the
consecutive node address to the secondary ControlNet module.
For example, partnered ControlNet modules with address switches set at 12 are
assigned ControlNet node numbers 12 and 13 by the system.
Figure 7 - Example of Redundant ControlNet Modules at Consecutive Addresses
TIP
The primary chassis always assumes the lower of the two node addresses.
CH2 CH1 OK
CH2 CH1 OK
Node 12 Node 13
ControlNet Module Switches
Primary Chassis Secondary Chassis

Allen-Bradley 1756-RM2 Specifications

General

Brand	Allen-Bradley
Model	1756-RM2
Category	Control Systems
Language	English