How to active electric signature for Acknowledge WinCC alarm ?

How to active electric signature for Acknowledge WinCC alarm ?

I have checked  "Comment required" and "Signature required"  , but it is worlking .

Hello Sean_XiaoEn,

you need to activate "Signature required" in the properties
of the message types in the part "Acknowledgment Theory".

see manual:
"SIMATIC HMI WinCC V7.5 SP2 WinCC Information System"
"How to Configure the Acknowledgment of a Message Type"

https://support.industry.siemens.com/cs/ww/en/view/109792585/137056620299

Signature required
An electronic signature is requested when acknowledging.
The information on the signature is saved as comment in the operator message.

The operator message for acknowledge a message you need to configure
in the Alarmcontrol.

see manual:
"SIMATIC HMI WinCC V7.5 SP2 WinCC Information System"
"How to configure operator messages"

https://support.industry.siemens.com/cs/ww/en/view/109792585/137140748427

Regards

Georg Berghof