Home » Ladder Logic for Stair-Case wiring using Toggle Switches
PLC Tutorials

Ladder Logic for Stair-Case wiring using Toggle Switches

Design Ladder Logic for Stair-Case wiring using two Toggle Switches in programmable logic controllers (PLC).

  • I0.0 & I0.1 : Input toggle switches.
  • Q0.0 : Output signaling device(bulb, motor etc.)

Ladder Logic for Stair-Case wiring

This ladder logic of stair-case wiring works on the X-OR logic i.e, Y is (A.B^) + (A^. B)

Suppose initially only I0.0 is pressed and I0.1 remains open physically as shown then the upper branch of rung 1 goes TRUE  and Q0.0 gets energized.

Ladder Logic for Stair-Case wiring using Toggle Switches

Now , if I0.0 is also pressed then it will make its interlock N-C contact I0.1 to go open and as a result Q0.0 de-energizes .

Again, if switch I0.0 is pressed it will also make its interlock contact I0.0 in parallel branch to go again N-C , which in turn makes the parallel branch logic true and Q0.0 again energizes but if the I0.1  input is also pressed again the logic goes FALSE and Q0.0 again de-energizes. This is the basic concept of an X-OR logic gate.

Articles You May Like :

Motor Start Stop Logic using PLC

PLC Program for Blinking Lamp

Multi Way Switches using PLC

How to use PLC Sub Routines

Down Counter PLC Logics

Related Articles

How a 4-20mA Transmitter Works ?

S Bharadwaj Reddy

PLC Program to Control Gas Pressure using Closed-Loop

S Bharadwaj Reddy

PLC Connection between Instrument, Junction Box, Marshalling & System Cabinet

S Bharadwaj Reddy

PLC Math instructions

S Bharadwaj Reddy

PLC Practice Questions

S Bharadwaj Reddy

Allen Bradley Math Functions

S Bharadwaj Reddy

Leave a Comment

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More

Ladder Logic for Stair-Case wiring using Toggle Switches

WordPress Image Lightbox

Send this to a friend