AC450/Advant Controller Synchronization with AC800M Controller and CI855 Card

Can any one help how we can make AC800M Controller as time master for MB300 network ?

AC800+CI855 card will be used , what program we need to write in the AC800M ?

What changes we need to do in the Advant Controllers , as existing Unix station is acting as time master which will be demolished ?

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RPM Rank: 34

Asked 4 months ago

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Please read the manual - required settings are documented!!!

What is not very documented is that the CI855 master role need to be protected by making absolute sure ALL OTHER MB300 nodes are muted in terms of adjusting or setting time, i.e. have their CLS1 element set to FALSE, 2, 0.

This may need to be revisited after software upgrades, etc. since 800xA for Advant Master tend to reset these settings after installing/upgrading. RTA Board Backup is required to make any change persistent across reboots.

To wake a "sleeping" CI855 clock master on MB300 (which may happen if any other MB300 node emit time adjust messages) either restart the CI855 or perform the following commands in OnLine Builder (target the CI855):

* SLTARG net,node
* RET CXAE000,10

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by vutq Rank: 116 on 12/15/2020 12:21:42 AM | Like (0) | Report

Hi,
If so, there will not have backup Clock Master node on MB300?

by Stefan Stromqvist AKS expert

Rank: 1 on 12/15/2020 12:32:18 AM | Like (0) | Report

You can have a second CI855 acting as backup if you want to.

IMHO: the assignment of clock master backup is not very robust and many tend to forget the content of SR7050 which outlines the requirements for keeping Daylight Savings Time correct.

I would use one or two CI855 to keep the time on a MB300 without involvement of any other node type.

by Stefan Stromqvist AKS expert

Rank: 1 on 12/15/2020 12:32:59 AM | Like (0) | Report

https://search.abb.com/library/Download.aspx?DocumentID=SR7050&LanguageCode=en&DocumentPartId=&Action=Launch

by vutq Rank: 116 on 12/15/2020 12:40:42 AM | Like (0) | Report

Thank you, Stefan.
Can you attach me the SR7050?
I intend to use one AC800M+CI855 to be Clock Master with SNTP from GPS time server.
However, after hearing from you, it should be carefully considered. The existing architecture have 4 Master & backups. But with AC800M, even redundancy, the structure is not equivalent.

by vutq Rank: 116 on 12/15/2020 12:47:04 AM | Like (0) | Report

can you help to send as attachment. I cannot access document at that link.

by Stefan Stromqvist AKS expert

Rank: 1 on 12/15/2020 12:52:27 AM | Like (0) | Report

ABB library is restricted to ABB employees and external users having an active Sentinel agreement. I'm not so sure posting restricted material on a public forum is the correct thing to do. Please try to contact someone within ABB over email.

by Stefan Stromqvist AKS expert

Rank: 1 on 12/15/2020 12:54:55 AM | Like (0) | Report

GPS > AC 800M > CI855 > MB300 sounds like a solid setup.
One GPS can be shared by many AC 800M if routed access is enabled.

The CI855 is a perfect Daylight Savings Master (and Clock Master) since it is hosted on a computer aware of System Time (UTC) and Daylight Savings settings. There are no worries or influences from SR7050 when using CI855 as the only time keeping device on a MB300.

by Stefan Stromqvist AKS expert

Rank: 1 on 12/15/2020 12:56:54 AM | Like (0) | Report

A CI855 will resume acting master after being restarted. This reduces the need for having a clock master backup.

by vutq Rank: 116 on 12/15/2020 1:02:32 AM | Like (0) | Report

I have sentinel subscription at Maintain level.
If can, please send me over email Vu.Tran@ncsp.com.vn
Thank you for support.

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Stefan Stromqvist AKS expert

Rank: 1

Answered 4 months ago

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AC450/Advant Controller Synchronization with AC800M Controller and CI855 Card

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