wincc advanced RT when connection loss

[apetkov5]

Dear all,
in wincc advanced RT (same as in wincc flexible), when connection to PLC is loss, output field (real) goes to ####.


I suppose that tag value of that field goes to something high?


Same tag is connected to analog alarm that is set to occur when tag value goes higher of "100".


Problem is when PLC is disconnected (shown ####, alarm is trigered)


How to avoid this? Is it possible to make that in case of communication loss, tag value become "0" or else?

 

[JesperMP]

I suppose that tag value of that field goes to something high?

No, the "#######" is to indicate that there is no valid value to display.

Same tag is connected to analog alarm that is set to occur when tag value goes higher of "100".
Problem is when PLC is disconnected (shown ####, alarm is trigered)
How to avoid this?

Generate a bit alarm in the PLC instead of an analog alarm.

Is it possible to make that in case of communication loss, tag value become "0" or else?

That would be to display false information.

The behaviour of displaying "#######" when there is no online connection is correct and only shows that Siemens has thought the funtionality through.