Today we are going to discuss PLC program for Push to ON device and Push to Off Device.But the trick is that we have to use only Normally open(NO) ,Normally Close (NC) contacts ,and Coil as output only(No timer,Counter, OSR ). In short there will be a single Push Button Input (X0) , and one Output (Y0). When user press Push button for 1st time output will be ON ,when user Presses Push Button for 2nd time output will be OFF. This is also called as "Push to On Push to Off " logic.Analogy can be provided with "TV" on and off Push Button.
- Using only NO,NC,Coil only
- Using Counter
- Using Pulse Instruction
- Using OSR (Rising Edge ,Falling Edge) Instruction