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WinCC v6.2 Redundancy problems

Created by: SCK_TVL at: 12/15/2008 4:47 PM (6 Replies)

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12/15/2008 4:47 PM	Rate (0)
SCK_TVL Regular Member Joined: 12/15/2008 Last visit: 9/19/2023 Posts: 6 Rating: (0)	Hello, We have a client server(redundant) configuration for WinCC v6.2. The next stations are configured: Client 1: BIO_CLNT01 à Windows XP Client 2: BIO_CLNT02 à Windows XP Server 1: BIO_SERV01 (preferred server) à Windows server 2003 Server 2: BIO_SERV02 à Windows server 2003 The communication between stations and S7-400 PLC is over Ethernet(switch).More information about WinCC and windows versions & SP & updates you can find into the attachement(INFO.ZIP) Assume the 2 servers are active and the 2 clienst are working with BIO_SERV01.If we switch off the BIO_SERV01, the BIO_SERV02 takes over. When we switch the BIO_SERV01 back ON,both Clients are switching during x minutes between BIO_SERV01 and BIO_SERV02. Sometimes the switching hold on for 1 minute another time 15 minutes???After that the clients choose for BIO_SERV01 or BIO_SERV02, it looks like the clients pick a server at random. When I stop the chosen server, the other server takes over without any problem. A serial cable from Siemens is used. I’ve tested with and without preferred server. Some remarks: 1) I’ve generated the redundant server with the “project duplicator” tool 2) The computers are in a workgroup ("WORKGROUP") 3) Simatic shell is OK 4) Speed Network cards à 100Mb/s Full Duplex 5) SP2 for WinCC6.2 isn’t installed Does somebody have some suggestions or solutions? Kind regards, Tom Attachment INFO.zip (55 Downloads)

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12/16/2008 10:20 AM	Rate (0)
Yai Posts: 62 Rating: (2)	Hi BIO_ENERGIE, From my experience and referring to your assumsion, after OS1 resume, the client should still link to OS2. Untill OS2 is down, the client will switch back to OS1. Yai
Yai Posts: 62 Rating: (2)
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12/16/2008 10:38 AM	Rate (0)
SCK_TVL Regular Member Joined: 12/15/2008 Last visit: 9/19/2023 Posts: 6 Rating: (0)	Yai Hi BIO_ENERGIE, From my experience and referring to your assumsion, after OS1 resume, the client should still link to OS2. Untill OS2 is down, the client will switch back to OS1. Yai Yai, Maybe it's possible but why are the clients continue switching between the 2 servers. The switching starts from the moment that both servers are active and stops after x minutes. Most of the time he will choose for BIO_SERV02. You can also choose a preferred server. I'll suppose that when there are 2 good servers, the client will always choose for the preferred one. Grtz Tom

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12/17/2008 4:48 AM	Rate (0)
Phantom75 Posts: 2661 Rating: (278)	Hi BIO_ENERGIE, BIO_ENERGIE ... The switching starts from the moment that both servers are active and stops after x minutes. Most of the time he will choose for BIO_SERV02. ... This happens when there are errors in the project... Analyze your WinCC diagnose files. The following FAQ is useful: What do the entries with undocumented error codes in the WinCC diagnostics file "SIMATIC_S7_PROTOCOL_SUITE_01.LOG" mean? Regards
Phantom75 Posts: 2661 Rating: (278)
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12/17/2008 8:12 AM	Rate (0)
SCK_TVL Regular Member Joined: 12/15/2008 Last visit: 9/19/2023 Posts: 6 Rating: (0)	Phantom75 Hi BIO_ENERGIE, BIO_ENERGIE wrote: ... The switching starts from the moment that both servers are active and stops after x minutes. Most of the time he will choose for BIO_SERV02. ... This happens when there are errors in the project... Analyze your WinCC diagnose files. The following FAQ is useful: What do the entries with undocumented error codes in the WinCC diagnostics file "SIMATIC_S7_PROTOCOL_SUITE_01.LOG" mean? Regards I've checked the diagnose files already but didn't find anything special. The two servers seperate works fine, so I'll think the project is without errors. But I will send the last diagnose files later on this topic. Tom

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12/17/2008 11:54 AM	Rate (0)
SCK_TVL Regular Member Joined: 12/15/2008 Last visit: 9/19/2023 Posts: 6 Rating: (0)	Hello, I've red that it'sadviced to adapt(generate) the LMHOSTS file if there is no server? Does somebody did it already? Does somebody know how to make it? Does somebody know how to use it? More and more quenstions Thx in advance Tom

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12/22/2008 4:40 PM	Rate (0)
Amno Advanced Member Joined: 10/22/2008 Last visit: 2/16/2021 Posts: 59 Rating: (8)	Hello BIO_Energie, you wrote in a other thread: I’ve installed the patch on 3 computers successfully. Except BIO_SERV02 I’ll get an error message--> See attachement Could it be that this redundancy problems are a outcome of a installation fault? Perhaps you better reinstall your computers take a image without this patch? Amno

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