I would use a NO rising edge contact to a set coil and a no contact to a simple timer and have the output of that timer to a reset coil.

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Edit

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With the setup I mentioned if in the off state and the button is pressed and held it would be on for the timer amount then turn off. If this is not ​desirable use a NO falling edge contact and a NC done on the set coil rung

Edit 2

this shows what i was talking about. the normally closed TimerDN bit prevents the output from coming on if it is started in an off state and the button is pressed for more than 2 seconds

Here is a snippet of a Digital output to relay test procedure that I use in some of my projects.

Maybe you can use some of it for your purpose.

DI-0.1.1.1 is a N.O. PB.

Out() is an array that is mapped to the physical outputs (the testing program has 100 digital outputs, I included one CPD instruction for the first output card.

ptr_relay is a count for which relay the math points to

When the button is released, the math counts to the next value (pointing to the next element of the array, and thus, to the next physical output)

If the button is held for 1 second, the count is cleared and any output that might have been on, is turned off.

I do not use this in operation of equipment, it is a post-build test procedure to verify that each of the 100 outputs are wired to the correct relay.

Maybe something like this.

Hi bespoken,

This is similar to a flip flop circuit, but as you said with a timer.

https://accautomation.ca/creating-a-flip-flop-circuit-in-the-plc/

Here is some logic that will work as you indicated.

I've used the simulator to test the circuit.

Attached is the simple program.

Here is a link on how to use the simulator.

https://youtu.be/9TyA5FOcvrE

I hope this helps you out.

Regards,

Garry

https://accautomation.ca/series/productivity-1000-plc/

I'd use a toggle coil.