Fitting set of beams to control gates

[davec.]

I have a Q60A control box and have fitted a set of beams to open the gate on approach, but as you would know, if you give the open signal whilst the gates have opened and parked on the timer, you put the gates on hold, so if a second vehicle goes through the beam whilst in this condition the gates become parked open. But also if you open the gates with the remote then drive through the beam on your way in you get the same condition.
So my question is how can I stop the gates parking on double signal or can I wire the beams in some way that they won't send a signal (activate the gates) until the gates have closed again