plc ladder logic interview questions Archives

PLC Switch Actuation Status

Determine the necessary PLC switch actuation status (i.e. low versus high process stimulus) to turn the yellow lamp on.

Sketch a Ladder Diagram program for this PLC to energize the lamp if the following input conditions are met.

Suppose we have a PLC connected to three pushbutton switches. Sketch a Ladder Diagram program for program example.

Suppose we have an Allen-Bradley MicroLogix 1000 PLC and two pressure switches we need to connect to it.

Programmable Logic Controller (PLC) Questions and Answers This PLC is being used to start and stop an electric motor, and

The following PLC program was written to control the operation of a large electric motor-driven pump. A variety of “permissive”

Programmable Logic Controller Questions and Answers The following PLC program was written to control the operation of a large electric

A wise PLC programmer once told me that the ﬁrst thing any aspiring programmer should learn about the PLC they

Liquid Mixing Application This is PLC Program for Automatic Liquid mixing Application. Problem Description In many industries, there are lots

Sequential Motor Control This is PLC Program for Sequential Motor Operating System. Problem Description In many industries, there are lots