Down Counter PLC Program
To study the working of Up Counter PLC program in Allen Bradley Programmable Logic Controller (PLC). Down Counter In the above picture, there are totally three parameter, COUNTER: C4:0 –...
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PLC Important Questions and Answers
This post covers the PLC important questions and answers which are discussed in an interview for automation engineer or PLC engineer. PLC Important Questions What is PLC ? An industrial ...
PLC Program for Bank Counter Application
A bank having three counters for Deposit /Withdraw cash in which totally 15 people are allowed for a day. When people count reaches 15, display will show Counter Closed and...
PLC Permissive for Motor Control
A engineer needs to write a PLC program to control a water pump driven by an electric motor. This water pump will be manually started and stopped by pushbutton switches,...
Troubleshoot Allen Bradley PLC Logic
A engineer needs to write a program for an Allen-Bradley CompactLogix PLC to control a pressure relieving solenoid valve in a gas processing system. A pair of high-pressure control switches...
Motor Trip Logic using PLC Programming
Programmable Logic Controller (PLC) Questions and Answers This PLC is being used to start and stop an electric motor, and also to shut it down automatically if any of three...
PLC Pump Permissive Interlocks
The following PLC program was written to control the operation of a large electric motor-driven pump. A variety of “permissive” inputs protect the pump from damage under abnormal conditions, and...
PLC Electric Motor Interlocks
Programmable Logic Controller Questions and Answers The following PLC program was written to control the operation of a large electric motor-driven pump. A variety of “permissive” inputs protect the pump...
Programmable Logic Controller Questions and Answers
Refer the below Programmable Logic Controller Questions and Answers which are useful for the exam preparation. Programmable Logic Controller Questions 1. A switch or a pushbutton is a ________ input. 2....
PLC Programming Questions & Answers – 5
A engineer needs to write a PLC program to control a water pump driven by an electric motor. This water pump will be manually started and stopped by pushbutton switches,...