time and date error in 800xa system ac800m for substation automation system
we are using 800xa system for substation automation( for monitoring switchgears) with ac800m controllers.from few dyas we are facing some time and date errors in our all our connectivity servers. we have total 4 connectivity servers and server 1 & 2 configured as PPA time server redundant.and time source is gps clock srver and its showing right time.whenever i am trying to change the date and time in servet 1 & 2 the changes valid only few seconds after that going back to normal wrong time.how can i restore date and time in connectivity servers.aslo its affected aspect,operator,historian servers bcs connectivity servers are the time source for these servers.even our many field controller(AC800M),Process panel date and time has been changed due to this problem.
see the configuration details..
1- gps clock is the time source to --->connectivity server 1/ server 2,server 3, server,4 (all are NTP Server/Client)
2- connectivity server 1 & 2 PPA time server and redundant
3-aspect,operator,historian, (all are PPA clients syncing from PPA time server)
4-engineering station NTP server(client is Process panel)
4-connectivity servers are the time source for ac 800 controllers (some controllers are configures asCNCP master and CNCP slave)
how can i restore my date and time back to noramal kindly ask if you need more details about configuaration
kindly replay ASAP
thank you all
You most likely have a time loop!
1) AC 800M slave to CS via SNTP
2) CS slave to AC 800M via CNCP
3) CS slave to GPS via SNTP
1+2 or 2+3 at the same time is no good...
If you wish to keep your system configuration the least you should do is to remove 2) by reconfiguring the AC 800M Connect in the CSes running AfwTime Server to NOT include the AC 800M Time Adaptor.
This is done from Programs and Features->AC 800M Connect->Change...
Please note that this may have to be repeated after each upgrade of the ABB 800xA software configuration.
An alternative could be to move AfwTime service OFF the AC 800M connectivity servers to another server type (to avoid picking up CNCP pulses which causes the time loop).
If possible, try making the AC 800M direct SNTP clients to the GPS. The GPS must be on the control network, or routable from the control network (setting CS as default gateway on both sides, in PLC and GPS can be used). By doing so, AC 800M Time Adaptor can be left enabled in the CS.
It is preferred to sync from "bottom" up to the "top"
With a GPS in the configuration, manual setting of time should not be done in any node for obvious reasons. Better check sync protocols for error messages or possible configuration errors such as time loops.
Don't forget to bring correct time to your domain controllers. At five minutes or worse difference login/authentication problems may appear.