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Down Counter PLC Program

S Bharadwaj Reddy
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 –...

PLC Important Questions and Answers

S Bharadwaj Reddy
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 Permissive for Motor Control

S Bharadwaj Reddy
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

S Bharadwaj Reddy
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

S Bharadwaj Reddy
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

S Bharadwaj Reddy
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

S Bharadwaj Reddy
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

S Bharadwaj Reddy
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

S Bharadwaj Reddy
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,...

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