This is a PLC program for the sequential lamp operation.
Problem
description: -
Write PLC program
to operate lamps in sequential mode using ladder diagram Language.
Problem diagram: -
Solution: -
Here in this system,
there are two lamps, two bush buttons which are connected to the PLC.
The bush buttons are connected to the PLC
inputs and lamps are connected to the Outputs of the PLC.
There are
following condition for the system to work which are as follows: -
1)
When
START PB is to be pushed lamp1 should start and lamp 2 should start after 5 seconds
of lamp1.
2)
When
STOP PB is to be pushed both the lamps1&2 are to be stopped.
Now to meet the following conditions we have use a timer which delay the operation of lamp2.
List of inputs/outputs: -
Inputs: -
1)
X0 -Start PB
2)
X1 -Stop PB
Outputs: -
1)
Y0 -Lamp1
2)
Y1 -Lamp2
Ladder diagram for the sequential operation of the lamps.
Program Description: -
-In Rung we used STRAT PB (X0) to start LAMP 1 (Y0). Here we used NC contact of STOP PB (X1) to stop the LAMP 1(Y0). In parallel of X0 contact we used NC contact of Y0 to latch the output.
-In second rung we
used Timer T1 to count the delay for the LAMP 2 (Y1).
-In rung 3 we used
NO contact of T1 so once time delay over the LAMP 2 (Y1) will on.
By Naisarg Prajapati