Modbus device is offline in Vista

Issue

Modbus device is offline in Vista

Product Line

TAC Vista

Environment

TAC Vista

Xenta 511

Xenta 913

Xenta 700

Cause

The Modbus device online check has to read at least one variable for the device to come online in Vista. If you only write values to the Modbus device, it will appear offline.
 

Resolution

As a workaround you may create a dummy variable that you read from in Xbuilder