18
You have to define the gate leaf's midpoint, its fully
opened position, and its fully closed position for the
internal limit switches.
To set the limit switch module, be sure the gate is in
manual mode (turn the Manual Release Lever
clockwise).
S8 is ON
S8 is OFF
(a) Chain drive
S8 is OFF
S8 is ON
(b) Rack and pinion drive
Figure 13. Set DIP switch S8 for your gate:
(a) For a chain drive, S8 is ON when the gate
closes to the left and OFF when the gate closes
to the right; (b) for a rack and pinion drive, S8
is OFF when the gate closes to the left and ON
when the gate closes to the right
Define the Midpoint
Move the gate leaf by hand to exactly the half-opened
position. The longer your gate leaf, the more important
it is that you be precise in positioning the gate leaf
exactly at the half-opened position.
With the leaf in exactly the half-opened position, locate
the retaining screw for the plastic tab that disengages
the limit switch module from the operator (see Figure
14). Remove the retaining screw that holds the plastic
tab.
Caution:
Do not pull the plastic tab up unless
the gate leaf is opened exactly halfway.
Now turn on the power to the gate operator. The ADL
status indicator LED should be on. If it isn’t on, call us
before proceeding. The light should be on to confirm
the working status of the ADL board.
The illuminated ADL LED also indicates the the
operator is at its midpoint of potential travel. So, turn
off the main power and pull the plastic tab up to engage
the limit switch module.
Once you remove the plastic tab, you must test whether
you properly defined the midpoint. To test the midpoint,
turn on the main power and move the gate leaf by hand
first in one direction and then in the other. The ADL
LED should turn off when the gate leaves the midpoint
and turn on when the gate is at the midpoint of travel.
1
2
1. Remove the retaining screw.
2. Pull the plastic tab up only if
the gate is opened exactly
halfway
Caution:
Failure to remove the plastic tab or failure
to remove it properly can result in the mechanical
failure of the operator.
Figure 14. Defining the midpoint