exchange of information on the status of the primary and secondary
systems
automatic transfer to the secondary system of the remote input and
block transfer read values (analog values, etc.)
transfer of control from the primary processor to the secondary
processor when one of the following conditions occur:
- power failure
- processor fault
- 1785-BCM module fault
- change in the primary processor’s mode from:
RUN to PROGRAM (manual switchover)
REM RUN to REM PROG
REM RUN to REM TEST