Final project

Industrial washing machines are common applications for timers. Typically, an operator will press a button and the washing machine will run for a given amount of time; then, a spin cycle will start. Essentially, this project will be an exercise in cascading timers. When one timer fires, it will trigger the start of another timer. Therefore, to begin this project, we will need the following variables.

Variables

To start off, let’s declare the following variables:

PROGRAM PLC_PRG
VAR
     wash       : TON; //washing machine timer
     spin       : TON; //spin timer
     start      : BOOL; //simulated start button
     washOn     : BOOL; //washing state
     spinOn     : BOOL; //spin state...