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OFF Delay Timer using PLC

S Bharadwaj Reddy
This article discusses about OFF delay timer instruction and its working principle using Allen Bradley Programmable Logic Controller (PLC) Ladder Logic. Timer OFF delay is to delaying the turning OFF

ON Delay Timer using PLC

S Bharadwaj Reddy
This article discusses about ON delay timer instruction and its working principle using Allen Bradley Programmable Logic Controller (PLC) Ladder Logic. ON Delay Timer In the above On-delay timer instruction,

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

How to Interchange ON Delay Timer and OFF Delay Timer in a PLC

S Bharadwaj Reddy
Timer functions are most important in PLC Programming. Logics play the important role in PLC Programming. According to PLC programmer’s skills, logic will get different in application. In this program,

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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