Home ยป PLC Programming for 3 Motors control in Ladder logic
PLC Tutorials

PLC Programming for 3 Motors control in Ladder logic

Write the PLC logic for the following problem.

  1. There are three motors (M1, M2 & M3), having a separate start and stop push button.
  2. M1 must be running before starting of M2 and M3 motor.
  3. M2 and M3 can start and stop without affecting M1 operation.
  4. Only two motors can run at the time. Starting of the third motor will shut down all the outputs immediately irrespective of its input.

PLC Program

PLC Programming for 3 Motors control in Ladder logic

PLC Programming Motors control

Example PLC Program for Motor

Program Description:

Rung 0000:

Start/Stop PB latched with memory B3:0/0 for Motor 1.B3:0/3 is connected in series with latch memory to turn off all motors.

Rung 0001:

Start/Stop PB latched with memory B3:0/1 for Motor 2 .B3:0/0 is connected in series to turn on M2 only after M1.

Rung 0002:

Start/Stop PB latched with memory B3:0/2 for Motor 3 .B3:0/0 is connected in series to turn on M3 only after M1.

Rung 0003:

Turning on M1 when B3:0/0 turns ON

Rung 0004:

Turning on M2 when B3:0/1 turns ON

Rung 0005:

Turning on M3 when B3:0/2 turns ON

Rung 0006:

M2 and M3 outputs are connected in series to enable B3:0/3

Program Output:

When M1 turns ON,

PLC Motor Control Circuit Example

When M1 & M2 turns ON

Ladder Logic for Motor Control

Basic Motors Control using Ladder Logic

When the Third motor Turns ON,

Motor Ladder Diagrams

Conclusion:

We can use this example to understand the programming logic in Allen Bradley PLC.

Author: Hema Sundaresan

Articles You May Like:

OFF Delay Timer in PLC

PLC Motor Permissive

ON OFF Control using PLC

PLC Programming Example

PLC Simulate Gate Array Logic

Related Articles

What is Loop Checking ?

S Bharadwaj Reddy

PLC Multiple Choice Questions

S Bharadwaj Reddy

PLC Program for Sequential Motor Control

S Bharadwaj Reddy

PLC Program to Separate Different Size Objects

S Bharadwaj Reddy

T Flip Flop PLC Ladder Diagram

S Bharadwaj Reddy

PLC Program for Star Delta Motor Starter

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

PLC Programming for 3 Motors control in Ladder logic

WordPress Image Lightbox

Send this to a friend