Multiple Choice
The sequencer shown advances its position whenever: 
A) S1 makes a false-to-true transition.
B) S2 makes a false-to-true transition.
C) the PLC is in the run mode.
D) either S1 makes a false-to-true transition or S2 makes a false-to-true transition.
Correct Answer:
Verified
Correct Answer:
Verified
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