Is it possibile to recordo on the AUDIT TRAIL, not only values changed on the panel (like set values, pressing of buttons), but also values that change in the PLC? Like a temperature that I want to save every 30 seconds if it change its value?

Because from my test, apparently the AUDIT TRAIL saves only actual operations on the panel, otherwise other GMP revelant tags that change value in the PLC are ignored...

Hi dan.v.

You could capture and record a change of the tag value in Audit Trail.

Please refer to page 15  in the PDF documentation in above link:

GMP-compliant Configuration with WinCC Comfort/Advanced, WinCC Audit and HMI-Panels

https://support.industry.siemens.com/cs/ww/en/view/109744244

Best Regards,

cga81

First, thank you for the answer.

Probably I was misunderstood.

I already did waht is described on page 15. I assigned a PLC tag to the HMI and selected GMP relevant.

The point is, if this tag is for example an Analog Input from the PLC, that changes his value constantly (or lets assume also with a PLC logic I just update it every 5 seconds), the AUDIT doesnt see this change, so it doesnt record the value changing.

For what i see, tha only changes that are recorded, are actual operations on the panels, so for example a new SET on a value made on the panel, the touch of a button, the login, etc...

I know the AUDIT probably is meant not for recording data like a DATA LOG, but the customer asked if it was possible to use it also for this purpose, so he had certified registration of DATA TRENDS.

CGA81

Hi dan.v.

You could capture and record a change of the tag value in Audit Trail.

Please refer to page 15  in the PDF documentation in above link:

GMP-compliant Configuration with WinCC Comfort/Advanced, WinCC Audit and HMI-Panels

https://support.industry.siemens.com/cs/ww/en/view/109744244

Best Regards,

cga81

Hi dan.v.

I'm afraid Audit Trail doesn't record this changes type. 

Best Regards,

CGA81

You Can use system function NotifyUserAction. I use it to save custom strings to Audit. Category, Object name and description can be e.g. tag. 

Edit: Confirmation type can be none and also mandatory commenting. So that can be used on value change. 

More edits: Do not set the tag to be GMP relevant, function logs it to Audit.