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WinCC V7.4 OPC Warning Message in the Log

Created by: WY. at: 8/15/2020 6:35 AM (5 Replies)

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8/15/2020 6:35 AM	Rate (0)
WY. Posts: 61 Rating: (0)	Dear All, Does anyone know below message mean? Recently, I found this during the server maintenance work. 2020-07-25 17:18:51,273 WARNING Requestlist size is 30 2020-07-25 17:18:51,426 WARNING Requestlist size is 60 2020-07-25 17:18:51,578 WARNING Requestlist size is 90 2020-07-25 17:33:48,728 WARNING Requestlist size is 30 2020-07-25 17:33:48,880 WARNING Requestlist size is 60 2020-07-25 17:33:49,044 WARNING Requestlist size is 90 2020-07-25 17:33:49,200 WARNING Requestlist size is 120 2020-07-28 09:50:31,726 WARNING Requestlist size is 30 2020-07-28 09:50:31,873 WARNING Requestlist size is 60
WY. Posts: 61 Rating: (0)
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8/16/2020 3:56 AM	Rate (0)
Madadi Bronze Member Joined: 12/28/2016 Last visit: 12/14/2025 Posts: 435 Rating: (55)	سلام Can you send a screenshot? Is wincc archiving information?
	https://pnap.ir If this Information really helps, you could use the Rate function😉
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9/1/2020 5:27 AM	Rate (0)
AutoGen_1959454 Regular Member Joined: 5/29/2020 Last visit: 1/14/2026 Posts: 7 Rating: (0)	Attachment ScreenShot105.jpg (162 Downloads)

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9/1/2020 8:50 AM	Rate (0)
bg2492 Posts: 7298 Rating: (2188)	Hello WY., there are different setting needed, that it work correctly: Open the SecurityController in the WindowsStartMenu via "Siemens Automation". It contains settings, which are made at the end of the installation of WinCC. see the following Manual and FAQS: Note however that domain group policies and restrictions in the domains may prevent installation. In this case, remove the computer from the domain before installing Microsoft Message Queuing, Microsoft SQL Server and WinCC. Log on to the computer concerned locally with administrator rights. Carry out the installation. Following successful installation, the WinCC computer can be registered in the domain again. https://support.industry.siemens.com/cs/ww/en/view/109736216/86201986187 Installation and operation of WinCC in a Microsoft domain environment https://support.industry.siemens.com/cs/ww/en/view/78346833 What are the requirements for operating OPC in connection with WinCC (V7 or Professional)? https://support.industry.siemens.com/cs/ww/en/view/109763316 WinCC V7.4: General information and installation Notes on operation https://support.industry.siemens.com/cs/ww/en/view/109736216/85949581963 Regards Georg Berghof
bg2492 Posts: 7298 Rating: (2188)
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This contribution was helpful to 1 thankful Users Madadi

12/4/2020 2:19 PM	Rate (0)
Mikael the gury s... Regular Member Joined: 4/29/2010 Last visit: 4/9/2024 Posts: 15 Rating: (1)	Hi, Did below information solve your problem? We have the same messages in the log files and are experiencing slow update on OPC-tags even when the OPC server is on the same computers as WinCC. I do not think that below answer is the solution and is therefor wondering if it helped you. There are no problems when running another OPC client software against the same OPC server. It seems as if the problem is within WinCC. Regards, Mikael

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12/9/2020 10:38 AM	Rate (0)
AutoGen_1959454 Regular Member Joined: 5/29/2020 Last visit: 1/14/2026 Posts: 7 Rating: (0)	Mikael the gury seeker Hi, Did below information solve your problem? We have the same messages in the log files and are experiencing slow update on OPC-tags even when the OPC server is on the same computers as WinCC. I do not think that below answer is the solution and is therefor wondering if it helped you. There are no problems when running another OPC client software against the same OPC server. It seems as if the problem is within WinCC. Regards, Mikael Hi Mikael That the WinCC cannot handle lots of OPC data polling? Any setting can change to make the system become more stable or without any warning error of OPC channel? Thanks

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