Hello, I have problems when downloading the client's project, from the ES, all the trend groups are deleted. How can I avoid that?

PCS7 8.2

WinCC 7.4

2 Redundant OS Servers

2 Redundant OS Clients

1 ES

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Split from How do you save the Configuration changes from a trend group with V7.1 trends?.

Hello Sebastian, 

If I understood the issue right, your trend group configurations on OS Clients are deleted every time the OS Client download is performed.

If these are Online trend group configurations(created from the buttons in WinCC), the trend files are stored in the 'TRG' folder inside the WinCC project. The same can be equalized across OS Clients or backed up if necessary. 

If the trend controls lost are from the Online Trend Control (configured inside the picture via Graphic Designer), go to Online Configuration Tab of the WinCC OnlineTrendControl Properties -> Online Configuration -> Retain Permanently and select 'Retain' for Online configuration at next picture change.

Have attached a screenshot which might be helpful for your case. Hope it helps!

 Hello TechnoBalze, 

TechnoBlaze

Hello Sebastian, 

If I understood the issue right, your trend group configurations on OS Clients are deleted every time the OS Client download is performed.

If these are Online trend group configurations(created from the buttons in WinCC), the trend files are stored in the 'TRG' folder inside the WinCC project. The same can be equalized across OS Clients or backed up if necessary. 

If the trend controls lost are from the Online Trend Control (configured inside the picture via Graphic Designer), go to Online Configuration Tab of the WinCC OnlineTrendControl Properties -> Online Configuration -> Retain Permanently and select 'Retain' for Online configuration at next picture change.

Have attached a screenshot which might be helpful for your case. Hope it helps!

Hello Sebastian, 

Unfortunately, since the trend groups data is not a part of the server data, it will get overwritten / wiped after a subsequent Operator station download from ES. The better way to hold configurations would be to configure Online Trend Controls in the Graphic Designer (maybe use a button on the graphic designer to call the specific online control which has been configured with 'Retain configuration' as mentioned my previous response in this thread)

Also to note (according to Siemens), if trend groups have been created on an OS server, they cannot be opened on OS clients and vice versa. Hence, the above solution might be the closest workaround possible (apart from holding TRG backups).

Hope this helps!