SM811 SYNC LED is turned off in Live ESD System (PM865).
ESD PLCs PM865 are running in redundant mode with redundant SM811 modules. Both controllers redundancy (DUAL) light is ON and CPU A is Primary. Primary CPU A is active at the moment and SM811 SYNC light is ON. but standby SM811 module SYNC light is OFF. I need support or guidelines how to resolve this issue on live ESD systems. Entire plant is running on same PLCs.
I need support for below points;
Question 1: How to enable standby SM811 SYNC light ON in live System (without shutdown)?
Question 2: With Standby SM811 SYNC LED OFF, If swithover is performed from CPU A to CPU B, would it successfully transfer control to CPU B without going in FAULT.
Looking forward valueable support in order to resolve this issue.
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