When programming MCR instructions, the first rung has a conditional MCR output instruction and the last rung is an unconditional MCR rung.

Question

Quizplus · Accepted Answer

This is generally true for programming MCR instructions in ladder logic. The first rung typically has a conditional MCR output instruction that triggers the program only if certain conditions are met. The last rung is often an unconditional MCR instruction that resets the system or performs other necessary functions after the program has finished executing.

When Programming MCR Instructions, the First Rung Has a Conditional