Syntax question

I cannot find an explanation as to what the figure in brackets means in the following

"pdoor1 = 1 [2]

What does the [2] mean / do /stand for?

Thanks

Figured it out :-)

Ralph, Glad you got it. I was going to ask for more info. Like what software, hooked to what.... ???

it displays the delay of the action
In this case the door light will illuminate 2 seconds later after the event.
I am not sure if the numbers are seconds ...

Thanks Jan and yes, the numbers are seconds