Automatic light blinking on 2s interval using PLC.

Automatic light blinking on 2s interval using PLC.

This is PLC Program for the automatic light blinking on 2s interval using PLC.

Problem Description

We need to light ON/OFF at 2 sec interval. Write the PLC for gram for this application using ladder diagram language.

Problem Diagram

Problem Solution

This problem can be solved by PLC logic. We can use timer instruction for this logic.

For explanation consider one switch for enabling the ON/OFF cycle and consider one lamp for monitoring.

When the user starts the cycle lamp will be ON and after 2sec delay it will be OFF automatically. This cycle runs continuously till start switch is pressed.

Program

Here is PLC program for the automatic light blinking on 2 sec interval using PLC.

List of Inputs/Outputs

Inputs List:-

ON/OFF SW =I0.0

E STOP:-I0.1

Outputs List:-

Light:-Q0.0

M Memory:-

M1.0=bit memory for lamp OFF command.

Ladder diagram for the automatic light blinking on 2 sec interval using PLC.

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Program Description

In network 1 when ON/OFF SW (I0.0) is pressed and lamp OFF command is not present then light (Q0.0) will be ON. So here we are using NO contact of ON/OFF SW (I0.0) and NC contact of light OFF condition (M1.0).

In this network once lamp (Q0.0) is ON then TON (ON delay timer) instruction is going to be executed and it'll set the lamp OFF condition. Therefore we've taken here NO contact of light (Q0.0), TON timer and programmed time 2s.

As per our condition light OFF condition (M1.0) ought to be OFF once 2s delay therefore we've got used TON once more. Therefore we tend to use NO contact of light OFF condition (M1.0) and TON with 2s programmed time.

E stop button is used for emergency stop cycle if any fault occur.