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Online synchronisation of Alarmlog list fro redundant server

Created by: kee at: 5/31/2006 9:14 AM (7 Replies)

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5/31/2006 9:14 AM	Rate (0)
kee Advanced Member Joined: 5/24/2006 Last visit: 11/14/2007 Posts: 93 Rating: (4)	Hi guys, Anyone knows why the Alarmlog list is not updated after the faulty server ofa redundant system is back online? attached document explained the steps and result i got from my test. regards Kee Attachment alarmlog_during_redundant.pdf (511 Downloads)

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5/31/2006 9:56 AM	Rate (0)
Nemo Posts: 3149 Rating: (171)	Hi, are there any entries in the WinCC logfiles? Is the serial cable pluggedat your red. servers? nemo
Nemo Posts: 3149 Rating: (171)
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5/31/2006 9:58 AM	Rate (0)
Salma Gold Member Joined: 9/27/2005 Last visit: 11/27/2007 Posts: 1398 Rating: (151)	First thing to check is did a synchronisation attempt occur. This will be recorded in the log files in the Diagnose directory. Remember that there are a series of check boxes in the Redundancy Editor that control what is synchronised and when. Is it possible that it's not configured as expected? Secondly it can take up to 15minutes for the servers to synchronise. Did you wait this long?

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5/31/2006 11:10 AM	Rate (0)
kee Advanced Member Joined: 5/24/2006 Last visit: 11/14/2007 Posts: 93 Rating: (4)	Hi Salma & Nemo, are there any entries in the WinCC logfiles? Yes! please see attachment. Is the serial cable pluggedat your red. servers? Yes! Remember that there are a series of check boxes in the Redundancy Editor that control what is synchronised and when. Is it possible that it's not configured as expected? Yes! All the checkboxes in the Redundancy Editor have been ticked. Secondly it can take up to 15minutes for the servers to synchronise. Did you wait this long? Yes! Waiting time is around 3 hrs by now. fyi, There is a small different configuration in WinCC for the servers, 'using OPC DA to pass information across servers for internal tags'. Hope this does not cause the Alarm synchronisation problem. regards kee chan yeat Attachment diagnose.zip (562 Downloads)

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5/31/2006 11:52 AM	Rate (0)
Salma Gold Member Joined: 9/27/2005 Last visit: 11/27/2007 Posts: 1398 Rating: (151)	The manual does state that both projects need to be identical so this might be the issue. However before we go down that road, I noticed a few things in your log files: - The backup path in TagLogging is set incorrectly - you should fix this. - The OPC log files are showing errors which you should clear up

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5/31/2006 4:14 PM	Rate (0)
kee Advanced Member Joined: 5/24/2006 Last visit: 11/14/2007 Posts: 93 Rating: (4)	Hi Salma, I'm wandering how does the online synchronisation works? 2 questions to ask: During 1 server down, following scenarios happened: [1] a binary output was SET and CLEAR (when server is back, the status is already back to it's original state. [2] a binary input was SET and CLEAR (same as above) My questions are (based on the above scenario) [1] Is it possible that online synch dont considerate those bits which toggle, by the time the server is back, they look normal to it? [2] Online synch dont take care of binary output which is send to IED? [3] will the online synch capture everything happening during one server down regardless of what their status during the recovery of server? why i said so! Because I saw two signals (BIs) are captured during the server down, and these two signals which have a state change in the view of the shutdown server when it's back inoperation. regards Kee

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6/1/2006 12:12 PM	Rate (0)
kee Advanced Member Joined: 5/24/2006 Last visit: 11/14/2007 Posts: 93 Rating: (4)	Hi Salma/Nemo, I've tried the redundancy servers again. I've clean up the previous error, please take a look and the new error in the log files. The scenario is the same as before! During 1 server down, following scenarios happened: [1] a binary output was SET and CLEAR (when server is back, the status is already back to it's original state. [2] a binary input was SET and CLEAR (same as above) My questions are (based on the above scenario) [1] Is it possible that online synch dont considerate those bits which toggle, by the time the server is back, they look normal to it? [2] Online synch dont take care of binary output which is send to IED? [3] will the online synch capture everything happening during one server down regardless of what their status during the recovery of server? why i said so! Because I saw two signals (BIs) are captured during the server down, and these two signals which have a state change in the view of the shutdown server when it's back inoperation. regards kee Attachment 01062006.zip (553 Downloads)

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6/13/2006 11:22 AM	Rate (0)
Salma Gold Member Joined: 9/27/2005 Last visit: 11/27/2007 Posts: 1398 Rating: (151)	[1] I don't think this should be possible [2] It should do [3] Again, it should It sounds to me that either a) something is set incorrectly ( unlikely I know ); b) the Redundancy Editor doesn't work as we expect it to; or c) there is a bug in the software. I do not know! If no-one responds here then it might be worth asking Technical Support. Sorry I cannot be of more help with this one [:(]

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