Rockwell Automation 1775-MX_S4A,D17756.3.1 User Manual PLC-3 BACKUP CONC(OR.DU1 User Manual
Page 81
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Using the 1775ĆMX
Memory Communication Module
Chapter 4
4-34
If an error occurs, check the following:
If the backup processor is powered down or faulted due to a memory
error, communication between memory communication modules will be
interrupted until the backup processor is functional again.
A broken communication cable between memory communication
modules will cause both the primary and backup processors to fault.
If a memory error occurs while executing a memory download, the
memory communication modules will attempt to complete the download
endlessly but without success.
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