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54 Series 90-70 Hot Standby CPU Redundancy User’s Guide – December 1993
GFK-0827
Press the Esc key twice to save the changes you have just made. This completes the
process of converting a Primary PLC redundancy system configuration to a Secondary
PLC redundancy system configuration. The differences between the Primary system
and the Secondary system are:
1. The CPU module parameter Redund Type in a Primary system is PRIMARY and in a
Secondary system is SECNDARY.
2. The Serial Bus Address (SBA) of a redundant GBC in a Primary system MUST be 31
and in a Secondary system MUST be 30.
The Genius Bus Controller bus level display in a Secondary PLC redundancy system is as
shown below.