Suppose we have a PLC connected to three pushbutton switches as shown in this illustration:
In the above diagram :
Determine the switch actuation statuses (i.e. pressed versus released) given the “live” display of the ladder logic program shown here:
Also, determine the status of the lamp connected to the PLC’s Y1 output.
Switch statuses:
The lamp will be de-energized.
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Credits : Tony R. Kuphaldt – under CC BY 1.0
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A lampada só acenderar se A e C for prenssionados juntos
Translated : The lamp only glow if A and C together is present.
thank you
The lamp only glow without any action on pushbutton means exiting field wiring and logic instruction condition is true when power on