In one of our plan we have 1 ESD, 1 F&G, 1 DCS, 10 Well RTUs
PM865 ESD Clock Master 1 - 172.16.80.XX Range IP
PM865 F&G Clock Master 2 - 172.16.80.XX Range IP
PM891 DCS Clock Sync via MMS with ESD controller because we have 2 different Control Network ( Safety CN and Non Safety CN) - 172.16.84.XX Range IP
The above time Sync is doing well.
For Wells(PM861) which are in same network as DCS 172.16.84.XX need Clock Sync.
Can DCS act as Clock Master 1 in Non Safety CN and same time DCS should Sync time with ESD controller via MMS.
Then Wells controller will get time sync with DCS controller via CNCP.
Voted best answer
CNCP is based on multicast telegrams which only reaches nodes on the same subnet (=RNRP Area).
Suggest using SNTP to bring the time from e.g the DCS connectivity server pair, but it can be read from any reachable node on the RNRP network. Most managed switches support SNTP as well.
To read SNTP time from a PC you will need to start the Win32Time service there, disable its "client provider" and enable its "server provider" with "always reliable time" (AnnounceFlag).
Refer to the System Network, Design and Configuration User's Guide - it has all the settings required described in detail.
What i understood from the description is DCS is another controller (PM891) for process control (other than safety) which is time synced with ESD controller (PM865).
The requirement is to time synchronize Wells (PM861) controller, which is also for process control (non safety) with DCS controller as both are in same network 172.16.84.xx.
Can you please confirm if i understood it correctly?
If my understanding is correct, then i doubt whether clock slave can act as Clock master for other controller. Better option would be to use SNTP server.