It is great that RTD temperature sensor inputs indicate an alarm condition on the Inputs table (red text) if the sensor is either open circuit or short-circuit.
In the same way it would be possible to indicate a wiring open-circuit fault if a range 48 (0-100% : 4-20mA) input has 0mA. Currently when a range 48 input is disconnected it indicates 0% value and “Normal” status - neither of which are true The ability to detect a fault is one of the main reasons why offsetting the “zero-signal” to 4mA was adopted.
I wonder if an “open” alarm indication could be implemented at some point for range 48? Alternatively, would it be possible to indicate a (correct) negative value - even just “negative” - no value? On the 4-20mA = 0-100% scale, 0 represents -25% - which could then detected in logic.
Its not quite the same as you describe with text on the inputs table showing colors and alarms but here’s a work around, to generate some alarms with the ALARM and DALARM statements.
10 DALARM IN1 = 0 , 10 , OPEN CIRCUIT ON INPUT1
When input one shows a value of 0ma for ten seconds this alarm text will be generated. From there you can send an email to your phone.