Brandon_K
Member
This has always eaten away at me ever since I started programming PLC's.
Simply, why do "Switch in STOP" tags exist? If the PLC is in stop, then it's not running any logic, as such it's silly to reference the tag. Of course, you could use it as a NC contact, but that contact will always be closed if the PLC is running, so why bother in the first place?
As someone who programs for retail-type applications, I would love to be able to make use of it so I can have a red indicator lamp turn on if someone is messing about and switches the PLC to stop.
Simply, why do "Switch in STOP" tags exist? If the PLC is in stop, then it's not running any logic, as such it's silly to reference the tag. Of course, you could use it as a NC contact, but that contact will always be closed if the PLC is running, so why bother in the first place?
As someone who programs for retail-type applications, I would love to be able to make use of it so I can have a red indicator lamp turn on if someone is messing about and switches the PLC to stop.