Some expressions return only one of two logical values, either TRUE(1) or FALSE(0). You can use these expressions to make decisions, and to perform one of two actions, depending on whether the return value is TRUE or FALSE. For example, you can configure a text object with appearance as follows:
In this example, if B1_PUMP_102_CMD is a digital tag (variable), it can only exist in one of two states (0 or 1). When your system is running and the value of B1_PUMP_102_CMD changes to 1, the expression returns TRUE and the message "Pump Running" is displayed. When the value changes to 0, the expression returns FALSE and the message "Pump Stopped" is displayed.
See Also
Published June 2018