174 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Chapter 7 Program the Redundant Controller
Disqualify the Secondary Chassis
To disqualify the secondary chassis, use the MSG instruction parameters listed in
this table.
Synchronize the Secondary Chassis
To disqualify the secondary controller, use the MSG instruction parameters listed
in this table.
Table 31 - Disqualify the Secondary Chassis
In this tab Edit this element To use this value
Configuration Message Type CIP Generic
Service Type Custom
Service Code 4d
Class bf
Instance 1
Attribute None - no value needed
Source Element INT tag with a value of 1
Source Length 2
Destination Element None - no value needed.
Communication Path Browse for the path to the 1756-RM or
1756-RMXT redundancy module.
Connected box Leave the Connected checkbox unchecked.
Table 32 - Synchronize the Secondary Chassis
In this tab Edit this element To use this value
Configuration Message Type CIP Generic
Service Type Custom
Service Code 4c
Class bf
Instance 1
Attribute None - no value needed
Source Element INT tag with a value of 1
Source Length 2
Destination Element None - no value needed.
Communication Path Browse for the path to the 1756-RM or
1756-RMXT redundancy module.
Connected box Leave the Connected checkbox unchecked.
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