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When will normally closed contacts open?
Steve Bailey
Lifetime Supporting Member + Moderator
Physical NC contacts open when the coil to which they're attached is energized.
NC contact instructions in a PLC go to the FALSE state when the memory location to which they're addressed goes to the TRUE state.
The picture of a NC contact that you see on your computer's screen while you're monitoring the PLC program won't change to a picture of a NO contact unless you edit the program.
NC contact instructions in a PLC go to the FALSE state when the memory location to which they're addressed goes to the TRUE state.
The picture of a NC contact that you see on your computer's screen while you're monitoring the PLC program won't change to a picture of a NO contact unless you edit the program.
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