opc DA disconnection and reconnection issue

[wanbinqs@gmail.com]

My Rapid Scada server, which collects OPC data, lost its network connection for a while, and when it reconnected, the data stopped refreshing. (I tried reconnecting in the properties, and it still connected. Perhaps the session was lost and the items are missing.) Is there any quick way to restore this? Doesn’t it require me to re-add the items?

[Mikhail]

Hi,
Please copy a part of the communication line log, describing the issue, into this topic.

[wanbinqs@gmail.com]

Is it the log file of the server? Or the log file of webstation?

[wanbinqs@gmail.com]

2025-10-16 10:23:33 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Webstation 6.2.2.0 started
2025-10-16 10:23:33 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Storage FileStorage 6.4.0.0 loaded from file C:\Program Files\SCADA\ScadaWeb\FileStorage.dll
2025-10-16 10:23:33 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Plugin PlgChart 6.1.0.0 loaded from file C:\Program Files\SCADA\ScadaWeb\PlgChart.dll
2025-10-16 10:23:33 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Plugin PlgMain 6.1.1.0 loaded from file C:\Program Files\SCADA\ScadaWeb\PlgMain.dll
2025-10-16 10:23:33 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Plugin PlgMimic 6.0.0.0 loaded from file C:\Program Files\SCADA\ScadaWeb\PlgMimic.dll
2025-10-16 10:23:34 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Plugin PlgMimicEditor 6.0.0.0 loaded from file C:\Program Files\SCADA\ScadaWeb\PlgMimicEditor.dll
2025-10-16 10:23:34 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Plugin PlgMimBasicComp 6.0.0.0 loaded from file C:\Program Files\SCADA\ScadaWeb\PlgMimBasicComp.dll
2025-10-16 10:23:34 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Plugin PlgScheme 6.1.1.0 loaded from file C:\Program Files\SCADA\ScadaWeb\PlgScheme.dll
2025-10-16 10:23:34 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Plugin PlgSchBasicComp 6.1.0.0 loaded from file C:\Program Files\SCADA\ScadaWeb\PlgSchBasicComp.dll
2025-10-16 10:23:34 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Plugin PlgStore 6.1.0.1 loaded from file C:\Program Files\SCADA\ScadaWeb\PlgStore.dll
2025-10-16 10:23:34 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Plugin PlgWebPage 6.1.1.0 loaded from file C:\Program Files\SCADA\ScadaWeb\PlgWebPage.dll
2025-10-16 10:23:34 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Plugin PlgMimic: Add components from the PlgMimBasicComp plugin
2025-10-16 10:23:34 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Plugin PlgScheme: Retrieve scheme components from the installed plugins
2025-10-16 10:23:34 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Plugin PlgScheme: Added components from the PlgSchBasicComp plugin
2025-10-16 10:23:34 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Receive the configuration database
2025-10-16 10:23:37 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] The configuration database has been received successfully
2025-10-16 10:23:37 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][INF] The application is ready for operating
2025-10-16 10:27:35 [DESKTOP-J9R71LQ][DESKTOP-J9R71LQ$][ACT] Webstation is stopped

• This reply was modified 1 month, 3 weeks ago by Mikhail.

[wanbinqs@gmail.com]

It started around this time yesterday. I initially thought the network cable that transmitted the OPC was disconnected and needed to be refreshed and uploaded again. This is the log of the webstation after the re-upload. Now I can still connect to the OPC and see the items, but the data is not refreshed.

[wanbinqs@gmail.com]

I searched for relevant information to find out whether this situation occurs because the COM Session is recycled by the system?

[wanbinqs@gmail.com]

Can this OPC disconnection problem caused by an unexpected network outage be resolved? Why hasn’t the data been restored after the network cable was restored?

[Mikhail]

The above log file belong to the web application.
You should find the log file of the communication line
SCADA\ScadaComm\Log\lineXXX.log

[wanbinqs@gmail.com]

Thank you for your reply. My problem has been solved. I changed the computer and reinstalled the software and related OPC core, and the communication was restored.

[Author]

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