Controller PM891 No time synchronization with external GPS
We have a network that has 12 controllers PM891 (principal and secondary) in a ring topology. Each controller belongs to the to control a hydroelectric generation unit. Recently, 3 of those 12 have lost the synchronization (Image 1) with the external which is reflected in the events and alarms displayed on the S+ system.
As you can see in Image 2, the controllers are configured to obtain the hour from We have this problem only in 3 units, the others are taking the time from the normally. We have 2 master GPS, each one of them connected to principal 172.16.0.0 and secondary 172.17.0.0 networ
Please, can you offer me some suggestions about what things do I have to check and may be a solution to this problem...
Furthermore, as you can see in the "Clock system status" window (Image 1), we are not able to check the status of the address 172.16.4.176. Why this is happening?
Nowadays, in those controllers we are setting the time manually in the
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Before submitting the case, run the C:\Program Files (x86)\ABB ...\AC 800M Fingerprint\AC800mfingerprint.exe tool to collect diagnostics (which is written to a folder below C:\ABB Industrial IT Data\Control IT Data\AC 800M Fingerprint\...). ZIP that folder and attach to the case.