stop button and plc's
stop button and plc's
(OP)
In a plc controlled system, can someone please tell me why I should use a normally closed stop pushbutton instead of a normally open pushbutton.
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RE: stop button and plc's
It is the same reason for your Stop pushbutton
RE: stop button and plc's
You want your logic to be "fail safe" and that is what a normally closed switch does for you. In the event of a failure (broken wire) you don't have to wait until you need the stop button to know that there is a problem.
RE: stop button and plc's
<nbucska@pcperipherals.com>
RE: stop button and plc's
A properly designed control system should "Estop" regardless of the state of any PLC inputs.Law in most countries.
Don't get this confused with a "cycle" stop, for example.