I was talking yesterday with Schneider Electric and they were mentioning that it’s possible to read the status of the system bits and Words (%S and %SW) provided you were using the UMAS protocol. Apparently, this is a special protocol that sits on top of the Modbus protocol, but it’s propriety for some crazy reason.
Can Ignition make use of this protocol by any chance? Or is there a way to directly read those system bits without having to map them to memory registers?
I ask because I’d like to get the %S12 bit (PLC running) status, but when the PLC isn’t running then it doesn’t update the status of the memory coil