Simple Sample: WinCC Unified acknowledge Alarm and get status via PLC Tag

Hi,

as from TIA V17, it is possible to acknowledge discrete HMI alarms as get acknowledgment state from PLC Tag.

In the alarm properties, there is two new division, “Acknowledgment”, with two boxes: Status Tag and Control Tag.

In Control Tag, you should configure a PLC Tag (DWORD) and inform which bit from this DWORD will be used to acknowledge the alarm. You should change the bit from 0 to 1 to acknowledge an alarm.

In Status Tag, you should configure a PLC Tag (DWORD) and inform which bit from this DWORD will be used to get the alarm status. Status goes to false when a new alarm came and goes to true if an active alarm is acknowledged.

sample project