This is PLC Program for 3 Phase Motor control (Forward/Reverse).
Problem Description
Write the PLC program for 3 phase motor control
(Forward Reverse) in SIMATIC manager using FBD language.
Problem Diagram
Problem Solution
In this case we'd like to
control motor in each direction which will be attainable solely by
forward/Reverse negative feedback circuit or Logic.
Here we tend to solve
this downside by easy Forward/Reverse management Logic.
So here we are going to
take into account one 3 phase motor for Forward and Reverse Operation.
And we can take 2
contactors or relays for control as a result of we'd like 2 totally different
directions here.
Also we must always take
into account 3 push buttons for forward, reverse and stop operate.
So here operator can use
FWD PB for forward operation, REV PB for reverse operation and STOP PB for stop
operate.
Program
Here is PLC program for 3 Phase
Motor control (Forward/Reverse).
List of Inputs/Outputs
Inputs
List:-
FWD PB-I0.0
REV-I0.1
STOP PB-I0.2
Motor
Trip-I0.3
Outputs List:-
Forward motor
contactor-Q0.0
Reverse motor
contactor-Q0.1
FBD diagram for 3 Phase Motor control (Forward/Reverse).
Program Description
In this application we
will use Siemens S7-300 PLC and SIMATIC manager Software for programming. We
can also design this logic with relay circuit.
Network 1:-In this network forward motor contactor (Q0.0) can be start by pressing
FBD PB (I0.0) and can be stopped by pressing STOP PB (I0.2).
Network 2:-In this network reverse motor contactor (Q0.1) can be started by pressing
REV PB(I0.1) and can be stopped by pressing STOP PB (I0.2).
Note:-Application is only for learning purpose .Above application may be different from actual application. This application can be done in other PLC also. Users are responsible for correct operation of the PLC system and for any possible injuries and or material damages resulting from the use of this program. It is necessary to take care of safety during implementation, installation, maintenance and operation.
All parameters and
graphical representations considered in this example are for explanation
purpose only, parameters or representation may be different in actual
applications. Also all interlocks are not considered in the application.