18
FAAC MODEL 844 Slide Gate Operator
Display
Function
Default
Display
Function
Default
OPENING PHOTOCELLS LOGIC:
Select the tripping mode of the opening photo-
cells.
They operate for the opening movement only:
they stop the movement and restart it when they
are released, or they reverse it immediately.
= Reverse immediately to closing
= Restart movement on release
ENCODER:
If the encoder is present, you may enable its
use.
If the encoder is present and enabled, "decele-
rations" and "partial opening" are controlled by
it (see relevant paragraphs).
The encoder operates as an anti-crushing de-
vice. If the gate hits an obstacle during opening
or closing, the encoder immediately reverses
the gate leaf movement for 2 seconds. If the
encoder operates again during the 2-seconds
reversing time, the movement stops (STOP)
without commanding any reversing.
If no encoder is supplied, the parameter must
be set to
. If there is the encoder, adjust
the sensitivity of the anti-crushing system,
by varying the parameter between
(maximum sensitivity) and
(minimum
sensitivity).
From
to
= Encoder active and sen-
sitivity adjustment
= Encoder disabled
Note 1
: To reset the programming default settings, check
that the edge input is closed (SAFE LED ON), and
simultaneously press keys
+, -
and
F
, holding them
down for 5 seconds.
Note 2
: Modifications of programming parameters take
effect immediately, whereas changes are saved to
memory only after you exit programming and return
to normal gate status viewing. If the equipment is
powered down before returning to status viewing,
any modifications will be lost.
Pre-limit switch DECELERATION:
You can select gate deceleration before the
opening and closing limit-switches have been
tripped.
Time can be adjusted from
to
in
0.1-second steps.
If an encoder is used, the adjustment is not
determined by time but by motor revs, thus
obtaining greater deceleration precision.
= Deceleration disabled
From
to
= Deceleration enabled
Post-limit switch DECELERATION:
You can select gate deceleration after the
opening and closing limit-switches have been
tripped.
Time can be adjusted from
to
in
0.1-second steps.
If an encoder is used, the adjustment is not
determined by time but by motor revs, thus
obtaining greater deceleration precision.
= Deceleration disabled
from
to
= Deceleration enabled
ASSISTANCE REQUEST (combined
with next function):
If activated, at the end of countdown (see the
next function: "Cycle Programming") it effects
2 sec. (in addition to the value already set with
the PF function) of pre-flashing at every Open
pulse (job request). It can be useful to set
scheduled maintenance jobs.
= Active
= Disabled
WORK TIME (time-out):
It is advisable to set a value of 5 to 10 seconds
over the time taken by the gate to travel from
the closing limit-switch to the opening limit-
switch and vice versa.
Adjustable from to
sec. in one-second
steps.
Subsequently, display changes to minutes and
tens of seconds (separated by a point) and
time is adjusted in 10 second steps, up to a
maximum value of
minutes.
Attention: the set value will not exactly
match the motor's maximum operating time
if decelerations are used.
PARTIAL OPENING:
You can adjust the width of partial leaf opening.
Time can be adjusted from
to
in
1-second steps.
If an encoder is used, the adjustment is not
determined by time but by motor revs, thus
obtaining greater partial-opening precision. For
example, with pinion Z20, partial opening can
vary from 2' to 13'.
CYCLE PROGRAMMING:
To set countdown of system operation cycles.
Settable (in thousands) from
to
thousand cycles.
The displayed value is updated as cycles
proceed.
GATE STATUS:
Exit from programming, save data and return
to viewing gate status (see Section 5.5.1.).
