Operate two conveyors by given time.

Operate two conveyors by given time.

Application:-There are two conveyors in the system and we need to operate them in given time. Here conveyor 1 should be start first and second conveyor should be start after some time. Write PLC program for the system using ladder diagram language. 

Explanation:-

As per above application, there are two conveyors in the system and we need to operate them in sequence. So when start button is pressed conveyor 1 will be on and second conveyor will on after 10 second delay. In this case we need to use on delay timer because we are giving delay between two conveyors.

 

PLC program:-

Write the ladder program for above application using ladder diagram language. Here for ladder logic we can use any supported PLC system like S7-1200, S7-300, S7-1500 or any other PLC which can support this instruction. For PLC logic we need digital inputs and outputs.

For our application start and stop buttons are digital inputs and conveyors are the digital outputs. So define digital inputs address and output address as per below explanation,

Digital inputs:-

Start button=I0.0

Stop button=I0.1

Conveyor 1 trip=I0.2

Conveyor2 trip=I0.3

Digital Output:-

Conveyor 1=Q0.0

Conveyor 2=Q0.1

PLC program Explanation:-

In network 1, we have used NO contact of start button (I0.0), so when button is pressed conveyor 1 (Q0.0) will be on immediately.

In network 2, we have used No contact of conveyor 1 (Q0.0) to operate conveyor 2 (Q0.1). Here we used on delay timer to provide delay between two conveyors.

NC contact of trip signal is used for safety of motor during the overload.