Hello,

of course it is possible just as you want to do it.
But to use cursor keys you haveto press the "ESC"-button additionally (e.g. ESC+C1).

For manually operated single steps i also think that it´s the best way to do this with the cursor keys if you don´t want to use inputs.
If you want to preselect an off-delay-time of e.g. 55 seconds, perhaps it would be better to use an analog input, use a potentiometer, an analog amplifier and refer this funktion block to the off-delay instead of pressing the cursor key 55 times.