Hi,

I've spend a little too much time on trying to figure out how to derive "Comms Loss" alarm from my Driver/Port settings using VT. I can see the value changes from 0 - Healthy to some other values when disconnected.

However, I couldn't figure out how to derive a simple "Comms Loss" tags from the system.

Any Advice would be welcome.

Add an Alarm tag (https://www.vtscada.com/help/Content/D_Tags/Alarm-Tag.htm) watching the driver tag. On the Trigger tab set the Function to be 'Not Equal To != or <>' and for the Setpoint set to constant 0.

Anytime the driver tag value is non zero it will trip the Alarm tag.