Browse FAQs

HMI not communicating with primary PLC via NOE 771

Published date: 24 September 2019

Issue:
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

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

Resolution:
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.  

Was this helpful?

What can we do to improve the information ?

Can't find what you are looking for?

Reach out to our customer care team to receive information on technical support, assistance for complaints and more.