The output symbol on a PLC ladder logic rung is active if
A) if all the input logic symbols on the rung have +24 volts applied to their input pins.
B) if a majority of the links on the rung are active.
C) if the output field device associated with that output symbol is off.
D) the link before the output symbol is active.
E) None of the above.

Question

Quizplus · Accepted Answer

The output symbol in a PLC ladder logic rung becomes active when the condition or link immediately before it in the logic sequence is active, effectively simulating the flow of electrical current in traditional relay logic.

The Output Symbol on a PLC Ladder Logic Rung Is