Time sync for ac 800m pm864 CPU from CI868
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Depends largely on system architecture. You can use various ways to synchronize AC800M from a time master. Make AC800M Controller as SNTP Client and IEC61850 connect server as SNTP Server. Synchronize IEC61850 Connect server from IEC net time master.
Or use two port GPS clock, one port for IEC net and another one for AC800M Controller.
Bottom line is that make AC800M controller as SNTP client getting data from SNTP server. This SNTP server should in turn get time from IEC net source.
CI868 can not write time back to AC800M Controller.