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498 Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Appendix A CIP Objects
Attribute Semantics
Relay Module Status
Each Auxiliary Relay module reports its status as part of the normal exchanges
with the main module. The bit assignments are as follows.
Bits 0…7 are common to all types of auxiliary module, bits 8…15 are specific to
type.
The auxiliary module controls Bits …15; the main module sets bit 0.
If bit 0 is set, the remaining bits do not reflect the current auxiliary module
status.
If communication with an auxiliary module are lost, then the main module sets
a status bit to indicate an auxiliary bus fault. If communication are restored,
then normally the fault indication clears, noting however, if a configuration
activity has failed, then the fault indication remains set until a successful
reconfiguration is completed. Normally this reconfiguration is achieved by
downloading the configuration from the controller to the appropriate main
module
Table 248 - Relay Module Status
Bit Description
0 Auxiliary Module Not Responding
1 Auxiliary Module Configured
2 MSP Code (CRC) Fault
3 MSP High Temperature
4 Link Fail
5 Halt Active
6 MSP RAM Fault
7 MSP RAM Access Error