ON VIDEO How to run a three phase motor with 💡PLC

 

How to run a three phase motor with 💡PLC

Three-phase motor controlled by PLC (Siemens) PLC
To implement the control circuit of electric motors through the programmed logic rule, it is necessary to know how to manage the programs for entering sound diagrams on the computer, and we will start with the first exercise, which is to operate a three-phase motor with the programmed logic rule.

Starter
While the previously discussed lighting control system is useful in explaining basic PLC operation, a more practical and slightly more complex application is the on-off control of an AC motor. Before looking at the PLC program, consider a hard-wired approach first.

Basic PLC program for controlling a three-phase motor - for beginners (pictured: Simatic S7-1500 PLC; credit: SIEMENS)



PLC and motor control application
This motor control application can also be carried out with a PLC. In the following example, a normally open start pushbutton is wired to the first input (I0.0), a normally closed stop pushbutton is wired to the second input (I0.1), and relay contacts normally closed overload relays (part of the motor starter) are connected to the third input ( I0.2).

These inputs are used to control normally open contacts in a line of ladder logic programmed into the PLC.

 

How to run a three phase motor with 💡PLC

Three-phase motor controlled by PLC (Siemens) PLC
To implement the control circuit of electric motors through the programmed logic rule, it is necessary to know how to manage the programs for entering sound diagrams on the computer, and we will start with the first exercise, which is to operate a three-phase motor with the programmed logic rule.

Starter
While the previously discussed lighting control system is useful in explaining basic PLC operation, a more practical and slightly more complex application is the on-off control of an AC motor. Before looking at the PLC program, consider a hard-wired approach first.

Basic PLC program for controlling a three-phase motor - for beginners (pictured: Simatic S7-1500 PLC; credit: SIEMENS)



PLC and motor control application
This motor control application can also be carried out with a PLC. In the following example, a normally open start pushbutton is wired to the first input (I0.0), a normally closed stop pushbutton is wired to the second input (I0.1), and relay contacts normally closed overload relays (part of the motor starter) are connected to the third input ( I0.2).

These inputs are used to control normally open contacts in a line of ladder logic programmed into the PLC.