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HMI not communicating with primary PLC via NOE 771

Published date: 24 September 2019

HMI is not communicating with the primary PLC via NOE 771 located in the primary PLC rack.

Product Line:
Quantum PLC Hot Stanby
NOE 771

Primary PLC NOE 771 card was not responding to the ping command, indicating the card had locked up

STOP processes on primary PLC, which shifted processes seemlessly to the standby PLC.
Primary NOE 771 card was reset by cycling power to the primary PLC (fuses).
After reset, the processes were reverted back to the original primary PLC.  

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