Basic PLC Ladder Programming Example 11


Basic PLC
Ladder Programming Training Example 11: START/STOP MOTOR CONTROL PLC Ladder Program  

 Basic PLC Ladder Programming Training Examples for Beginners. Hi
Friends here we are starting a series of Free Training on PLC Ladder
Programming. These PLC Ladder Programs are important to get basics of Ladder
Programs

PLC Ladder
Practice Problem:


Design
and connect a ladder logic control for a simple starter system of a 3 phase AC
motor. The starter has one start and one stop switch. Both of the switches are
momentary contact switch. Start switch is normally open and stop switch is
normally close. Output relay, C1, Controls the 3-phase supply to the motor. The
motor has a stop and a run indicator lights. 
Direct on Line Motor Start Stop using PLC

EQUIPMENT
AND SUPPLIES 
 1.  PLC
with Input and Output Modules
4.  3
Phase AC Motor, Momentary contact switches
5. 
Electromagnetic contactors or solid state relays
6. 
230V, 15A rated wires  
Topics
Covered in this example is START/STOP
MOTOR DOL CONTROL PLC Program  

Number of
PLC Inputs Required 


X1- Start Switch (NO)
X2- Stop Switch (NC)
Number of
PLC Outputs Required 

Y0- Motor Relay
Y1- Motor Run Light
Y2- Motor Stop Light

PLC Ladder
Programming: 


PLC Ladder Program for DOL Motor Starter

PLC Ladder
Programming Description: 

When Start
Push button Pressed Motor Relay M1 will on and Latched similarly RUN light will
be on. When Stop Button Pressed Latch gets open and Motor Relay gets OFF Hence
Motor.
Note: Example is only for training purposes. No
Practical implementation is done.

Leave a Reply