Home » ON Delay Timer using PLC
PLC Tutorials

ON Delay Timer using PLC

This article discusses about ON delay timer instruction and its working principle using Allen Bradley Programmable Logic Controller (PLC) Ladder Logic.

ON Delay Timer

On Delay Timer

In the above On-delay timer instruction, there are totally four parameter,

TIMER: T4:0 – Timer File name (Timer T4:0, T4:1, T4:2…)

TIMER BASE – How the time need to count, in Seconds, Milli Seconds…

PRESET – Limit value of Timer-Up to how much it should count

ACCUMULATOR – Running Value of timer when it is in ON condition.

Program Description:

ON delay timer purpose is to delaying the ON time,

Example : After the turning ON of main switch, Air Conditioner takes nearly 5s to 15s to turn ON.

On Delay Timer PLC Logic

On Delay Timer using PLC

On Delay Timer using PLC

RUNG 0000

Start and Stop Switch is to turn ON/OFF the timer.

RUNG 0001

When start switch is pressed, Timer Enable bit (T4:0/EN) is turned ON to show the status of TIMER ON/OFF condition

RUNG 0002

When start switch is pressed, along with the timer enable bit timer timing bit also turned ON to show the status of timer’s accumulator (T4:0/ACC)value is currently in running state.

RUNG 0003

When start switch is pressed, timer starts running from zero to preset valve, timer’s done bit is turned ON when accumulator value reached preset value.

Conclusion:

We can use this example program to understand the working of ON delay timer function in Allen Bradley PLC.

Author : Hema Sundaresan

Articles You May Like :

Design PLC Quiz Project

PLC Questions & Answers

MCQ on PLC Logics

PLC Output Configuration

Temperature control using PLC

Related Articles

What is Interposing Relay in a PLC System ?

S Bharadwaj Reddy

Industrial Networking and Wireless Interview Questions

S Bharadwaj Reddy

What is a Control Panel and its types?

S Bharadwaj Reddy

Architecture of Instrumentation & Automation System

S Bharadwaj Reddy

Types of Interrupt OB in Siemens Tia Portal

S Bharadwaj Reddy

Parallel Tanks Level Control using PLC Ladder Diagram Tutorial

S Bharadwaj Reddy

Leave a Comment

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More

ON Delay Timer using PLC

WordPress Image Lightbox
Send this to a friend