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7-12 Genius Modular Redundancy Flexible Triple Modular Redundant (TMR) System
User’s Manual – March 1995
GFK-0787B
PLC OK Flags
The meanings associated with the three PLCOK flags are listed below:
At PLC A
PLCAOK PLC A outputs enabled
At PLC A
PLCBOK PLC B communications with PLC A healthy
and PLC B outputs enabled
PLCCOK PLC C communications with PLC A healthy
and PLC C outputs enabled.
At PLC B
PLCAOK PLC A communications with PLC B healthy
and PLC A outputs enabled
At PLC B
PLCBOK PLC B outputs enabled
PLCCOK PLC C communications with PLC B healthy
and PLC C outputs enabled.
At PLC C
PLCAOK PLC A communications with PLC C healthy
and PLC A outputs enabled
At PLC C
PLCBOK PLC B communications with PLC C healthy
and PLC B outputs enabled
PLCCOK PLC C outputs enabled.
Resetting Status Flags
Startup status flags (with asterisks in the table on the previous page) remain set until the sys-
tem is restarted. They can also be reset by the application program. To reset a status flag, enter
0 in its %M reference.