Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: How to Blink Lights in Ladder Logic?
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > PLC Tutorials > How to Blink Lights in Ladder Logic?

How to Blink Lights in Ladder Logic?

This article explains how to blink lights in ladder logic with a detailed explanation video for beginners and engineers.

Last updated: April 8, 2024 4:23 pm
Editorial Staff
PLC Tutorials
No Comments
Share
4 Min Read
SHARE

This article explains how to blink lights in ladder logic with a detailed explanation video for beginners.

Contents
How to Blink Lights?Practical PLC Learning VideosDigital InputsDigital OutputsBlink Lights Ladder LogicProgram DescriptionPLC Program Summary

Note: The ladder logic example is designed for engineering students to practice PLC programming.

How to Blink Lights?

Problem Statement:

Design a PLC ladder logic for the following application.

We are using one toggle switch to control the blinking of light.

Make a light blink with an interval of 2 seconds.

Practical PLC Learning Videos

Our practical PLC learning videos help you master PLC programming with real-time examples.

How to Blink Lights in PLC Ladder Logic? - Programming Examples

Digital Inputs

The required inputs are shown below.

Start button: I0.0

Digital Outputs

The required outputs are shown below.

Light: Q0.0

Blink Lights Ladder Logic

How to Blink Lights in Ladder Logic

Program Description

We used Normally Open Contact for the Start button.

For Light and memory bit, two Timer Functions Block Type TON and TP are used.

To keep the Light ON for 2 seconds, Timer Function Block type TP is used.

Timer Function Block type TON is used for the Memory bit to turn it ON after a delay of 2 seconds.

PLC Program Summary

How to Blink a Light Bulb with Ladder Language

The signal will flow also through the Normally Closed Contact that is used for memory bit as it is false state when the Start button is turned ON.

Timer functional block type TP (TM0) will allow the signal to flow for 2 seconds only. As a result, the Light will be turned ON.

After 2 seconds, the signal will not flow because of the Timer functional block type TP (TM0). The light will turn OFF after being ON for 2 seconds.

Blinking led ladder diagram

Simultaneously, when the Start button is turned ON and when the Light gets turned OFF after being ON for 1 s, the signal will flow through the Normally Closed contact used for Light. There will be a delay of 2 seconds and after that memory bit gets true.

In those 2 s, the Light will remain OFF. After a delay of 2 seconds, the coil used for the memory bit becomes true, and the Normally Closed Contact used for the Memory Bit will also become true. The Normally Closed Contact in its true state will break the circuit.

As a result, the coil used for the coil memory bit becomes false which in turn makes the Normally Closed Contact used for the memory bit false. The signal will again pass to the Light and it will be turned ON for 2 seconds. After that, it will remain OFF for 2 seconds and then it will repeat the process again and again.

Blinking output with time on and time off

If you liked this article, please subscribe to our YouTube Channel for PLC and SCADA video tutorials.

You can also follow us on Facebook and Twitter to receive daily updates.

Read Next:

  • PLC Programming Example with Motor
  • InTouch Scada using Scripting Tutorials
  • PLC Code to Start & Stop Motor and Pump
  • Electrical Ladder Diagram Control with Timers
  • PLC Important Questions and Answers
Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

Contacts and Coils in PLC Ladder Logic
How CPU Execute Program in Siemens PLC?
Jog Function in Motor Start Stop Logic using PLC
Elevator PLC Ladder Logic
Siemens PLC Mathematics Instructions
CX-Programmer Tutorial: 1 Button To Activate 4 Different Machines
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
Leave a Comment

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

Car Parking System using PLC Programming
Normally-open and Normally-closed Switch Contacts
PLC Motor Logic with START, STOP, TEST Push buttons
Single-Acting Cylinder Control using Proximity Sensor
What is PLC Redundancy?
Define the Order of Execution in Functional Block Diagram of Studio 5000
Automatic Empty Bottle detection using PLC Logic
PLC Program for Controlling a Water Pump with 3 Power Sources

Keep Learning

PLC Water Project

Smart Spray System using Wecon PLC

What is Loop Checking

What is Loop Checking?

Downloading Free PLC software

Step by Step Guidelines for Downloading Free PLC software

Types of Scan Time in a PLC

Programmable Logic Controller (PLC) Scan Time – Types, Theory

Start the Counting from a Preset Value in PLC

Start the Counting from a Preset Value in PLC

How to do Force in GE PLC Proficy Machine Edition?

Simatic Prosave HMI

How to Backup and Restore from Simatic Prosave HMI?

Simple PLC example Hardware configurations

Muting Functions of Safety Control Circuits – PLC Example

Learn More

PLC Program for 2 Push buttons to Control 1 Output

PLC Program for 2 Push buttons to Control 1 Output

Instrumentation Inspection and Quality Control Questions

Instrumentation Inspection and Quality Control Questions

pH Analyzers Questions and Answers

Combination Electrode Questions & Answers

Hook-up Diagram for Pressure Gauge

What is Instrument Hook Up Diagram ?

Differences Between AC and DC Motors

Derivative Controller Response

Derivative Controller Principle

What is a Bourdon tube

Bourdon Tube Pressure Gauge Advantages and Disadvantages

Instrument Protection Methods: Seals

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?