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7-38 Genius Modular Redundancy Flexible Triple Modular Redundant (TMR) System
User’s Manual – March 1995
GFK-0787B
CPU being stored to in Stop mode and store a complete program from the
programmer to the PLC. This cleans up any fragmentation that exists and enables
future online changes.
If an online program change is made to a single PLC and subsequently deleted
before the same change is made to the other PLCs in the system, it is possible that
the program checksum will not match, even though the programs in the CPUs
appear to be the same. Logicmaster 90-70 may also indicate “Logic Not Equal” when
connected to a PLC in which the change/deletion was not made. To recover from this
condition, a “run mode store” may be required at the PLCs in which the deletion
was not made.