Using RSLogix to program Micrologix 1000.

I'm having problems writing a program that uses 1-push button to turn on LED then push the same button to turn the LED off.

I can use a seal-in circuit or a latch to turn it on but cant figure out how to write the next rung to turn it off with the same button.

Any suggestion?

 

Use a state variable to keep track of the LED state (ON |OFF). Simply toggle the variable from one state to the other each time the button is pressed and released. Have a rung simply turn the light on or off based on the state variable.

 

Im not quite sure if I understand how to set a state variable? Is that similar to setting the I/O to a simple 0;1?

The only thing I could imagine is a latch then seal the input then somehow unlatch using some parallel command..