on video Star-Delta Starter PLC Program and Wiring_Part 5

 To start your motor with star-delta start method, you need 3 contactors. One for turning the motor on and off, one to connect the motor windings in star, and one to connect the windings in delta. In this lesson you’re going to learn how to wire these contactors to the motor terminals. 

Previously you’ve learned how a star-delta starter can reduce the rush current of the three-phase motors and what is the proper wiring of the contactors to the motor and also to the PLC in a simple step-by-step format. In this lesson, I’m going to write a PLC program to start and control the 3 phase motor with the star-delta starter method. 

Before writing the program I need to first define, in the software, all of the PLC modules that I’ve used in the actual environment. I have to let the software know the exact CPU model and input and output modules that were used. Every S7 PLC module has a unique “order number” which I can use as sort of a name to define that module in the software. Now let’s do this together step-by-step.

 To start your motor with star-delta start method, you need 3 contactors. One for turning the motor on and off, one to connect the motor windings in star, and one to connect the windings in delta. In this lesson you’re going to learn how to wire these contactors to the motor terminals. 

Previously you’ve learned how a star-delta starter can reduce the rush current of the three-phase motors and what is the proper wiring of the contactors to the motor and also to the PLC in a simple step-by-step format. In this lesson, I’m going to write a PLC program to start and control the 3 phase motor with the star-delta starter method. 

Before writing the program I need to first define, in the software, all of the PLC modules that I’ve used in the actual environment. I have to let the software know the exact CPU model and input and output modules that were used. Every S7 PLC module has a unique “order number” which I can use as sort of a name to define that module in the software. Now let’s do this together step-by-step.