internal registers/flags AB Micrologix 1000

I'm new to PLC programming. I'm trying to write a program that turns on a LED and flashes it.

I'm trying to find some way to set an internal flag/register that can execute a timer enable function. What instruction do I use to do this?

In the attached image, I want to latch a "flag" on when I turn on "TOG1" and press the "GRN_PB" switch. That flag will turn on the timer and start flashing.

I want to disable (unlatch) this flag when I press "REDPB"

I don't need to use one of the discrete outputs on the PLC since this is internal, so what should I use here?

It looks OK except that REDPB appears to be an Output bit instead of an Input bit. But maybe the image is just too fuzzy.

bernie_carlton said:

It looks OK except that REDPB appears to be an Output bit instead of an Input bit. But maybe the image is just too fuzzy.

Click to expand...

Yeah, it was set to an output bit, but I changed that to an input bit.

With the revision to an Input bit it should work. To be frank - the logic could have been a lot more compact but whatever works - works.

If it is working then we can talk about minimizing and optimizing.

bernie_carlton said:

With the revision to an Input bit it should work. To be frank - the logic could have been a lot more compact but whatever works - works.

If it is working then we can talk about minimizing and optimizing.

Click to expand...

So the program works, but in its current state, I'm setting an output bit O:0/4 to on to enable the timer. The plc I have only has four outputs, so I'm addressing an imaginary output. Is this the right way to set an "internal flag" or is there another function to use?

Also, is there an easier way to have an output "strobe" like this? What's your suggestion for minimizing the steps in the program?