Safeguard controller SIDE A load going up to 94%
We have an installation of 22 dual safeguard nodes,six set of redundant connectivity servers with comon xA 4.1 SV.
In one of our node only side A load is going up to 94% and it usually gets normalised with in 40-50 seconds, with in this span of time load gradually increases to 90% and become to normal or current running load (52%)
Anybody has faced such issue ?
Have you performed any ANPER Task Load analysis?
With some iterations the analysis shall be able to tell what process (task) that is responsible for the unexpected load increase.
I seem to recollect that SG400 can have an issue with some analogue IO board supervision. There was also some issue with a serial UART on the AC410 main CPU board that could cause load increase - terminating the serial port with a resistor could solve that (or upgrade to a later hardware revision).
Please contact your regional ABB support center for advice.