Impact on time synchronization during Migration of Unix -OS to 800XA

We are migrating to Unix -OS to 800XA migration , where looking for parallel operation of UNIX and 800XA together for some time .

What steps/configuration we need to start with when migrating with out impacting the time synchronization or any other function?
When have faced issue in acknowledging the alarm ( Multiple times acknowledge need to be pressed or wait for longer time to get the alarm

acknowledged) when we have 800xA and UNIX-OS together

Existing System:
UNIX-OS ( Time Maste
AC450
Safeguard

Upgrade System:
800XA 6.1 +RTA Board

New system setup like below:
1) Advent Connectivity server acting as time master Afwtime server) getting time from GPS
2) RTA Board is set to act as time master in RTA configuration ( CLS data base is set (1,0,1) both primary and secondly connect server)

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RPM Rank: 34

Asked 1 month ago

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This is called Reverse Synchronization Mode (when PU410/RTA takes time from its host instead of vice versa) and a detailed description is waiting for you in the Network Configuration User's Guide.

The GPS time can be easily be brought into the AfwTime Service master using the Win32Time service's NtpClient function. The reverse sync function is operational even when AfwTime is in Standby state so you can wire in GPS time in any server you like as long as AfwTime is in Service state where you do, but I recommend selecting the computer hosting the PU410 in Reverse Sync Mode to shorten the path and reduce number of relaying stations.

Please read 3BSE034463-610 first, then ask here on AKS...

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by RPM Rank: 34 on 3/13/2021 2:21:49 PM | Like (0) | Report

I have gone through the manual , it was not getting the clarity as manual is provided with so many options.
We should use reverse time synchronization in RTA board if Advent connect server need to act as a time master .

My question is also related to Migration , any special care to be taken when connecting Advent and 800XA on the same network ?

by Stefan Stromqvist AKS expert

Rank: 1 on 3/13/2021 10:11:15 PM | Like (0) | Report

Yes, setting up clock sync is giving you many options.

The manual is comprehensive but cannot service every given configuration with a detailed and tailor made description.

Multiple protocols may have to be combined - the general recommendation is to RELAY time from some source to every node in need without making LOOPS (where two or more protocols fight against each other).

Perfectly OK to use Win32Time in every node, but be careful where you enable NtpClient=1 in registry, do not have AfwTime acting as CLIENT where NtpClient is set to 1 as this will create a ”fight”

Only one clock master is allowed per MB300 control net so your must decide which one to have in service, the old or the new, not both.

by RPM Rank: 34 on 3/14/2021 10:08:19 PM | Like (0) | Report

What about the RTA Board on connectivity server as we have two RTA board - We should make only one RTA Board as time master ?

by Stefan Stromqvist AKS expert

Rank: 1 on 3/15/2021 3:42:03 AM | Like (0) | Report

In theory, PU410 #2 can act "Clock Master Backup".
There has been problems in the past with having CMB in parallel with CM, at DST shift the shift was made "twice". I cannot tell if that is still a problem. The internal order between CMB and CM is handled automatically as long as they have connection. If they become separated, the CMB will become CM after about 30 minutes. If you then join them, you will have two CM and system messages. Then set time in the one you want to keep, or restart the one you do not want to keep as CM.
You choose... :-)

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Stefan Stromqvist AKS expert

Rank: 1

Answered 1 month ago

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Impact on time synchronization during Migration of Unix -OS to 800XA

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