Nice Wil Instructions And Warnings For The Fitter page 11

and is carrying out a test of the internal parts; lastly an irregular,
non constant flashing means that the test was unsuccessful and,
consequently, there is a failure.
C) Now check that the LEDs of inputs with NC type contacts are on
(all the safety devices active) and that the LEDs of inputs with NO
type contacts are off (no command present); if this does not hap-
pen check connections and effectiveness of the various devices.
D) Check that all the safety devices on the plant are working prop-
erly (emergency stop, photoelectric cells, pneumatic edges, etc.);
each time they trigger the corresponding STOP, PHOTOCELL or
PHOTOCELL 1 should turn off.
• This is one of the most important checks and must be done with
great care, in actual fact the "active" safety of the gate machine
depends on the correct functioning of the safety devices. If the
flashing light is an excellent instrument for signalling the state of
danger and the torque limiting devices are an excellent means to
minimise damages, only a correct installation of the safety
devices will make it possible to block the automatism before it
can cause any damage.
E) Now is the time to check whether movement occurs in the right
direction, that is, to see whether movement set on the unit corre-
sponds to that of the gates.
This check is of paramount importance, if the direction is wrong
in some cases (in the semiautomatic functioning mode for
instance), the gate might appear to be working properly; in fact,
the OPEN cycle is similar to the CLOSE cycle but with one basic
difference, the safety devices are ignored in the closing manoeu-
vre which is normally the most dangerous, and they will trigger in
the opening manoeuvre causing the gate to reclose up against
the obstacle with disastrous results!
Lock the boom gate with the bar at a 45° angle so it can move freely
in both directions. Now give a brief command pulse on the OPEN
input and if the bar does not move in the opening direction proceed
as follows:
1) Turn the electricity off to the boom gate
2) Unplug the "MOTOR" connector and replug it after it has been
turned 180°
3) Unplug the "LIMIT SWITCH" connector and replug it after it has
been turned 180°
Repeat the procedure described above in point E to see if rotation
direction is right.
Note:
when direction is reversed then all the three procedures described
above have to be carried out. In particular, if, for example, you turn
the "MOTOR" connector but not the "LIMIT SWITCH" connector it
will cause an error in the slowing down system. In such a case, the
motor is controlled, for instance, in the opening phase but the FCA
limit switch is never reached and consequently the bar reaches the
opening point with maximum force; the ammetric detecting system
then comes into play reversing direction in a new manoeuvre which
is also wrong.
F) Having checked all connections and motor rotation direction, it
is possible to try a complete movement, we recommend that you
always work in the manual mode with all functions deactivated.
If you use the Step-by-Step as the command input, the first
movement (after turning on) should be an opening one.
By means of the command inputs, move the bar up to the opening
point; about 20° from the stopping point the FCA limit switch should
trigger, activating the "slowing down" phase which makes the bar
reach the set point at a slower speed. Now carry out a closing phase
until the closing point is reached; in this case too, the FCC limit
switch should trigger, activating the slowing down phase 20° before
movement stops. Now test triggering of the safety devices: PHO-
TOCELL in opening has no effect while in the closing phase it caus-
es the bar to stop; PHOTOCELL 2 has no effect in the closing phase
while in the opening phase it causes the bar to stop. The devices
connected to the STOP input act both in the opening and in the clos-
ing phases, causing the bar to stop.
G) The hazardous situations caused by the movement have been
safeguarded by limiting the force of impact, the impact force
must be measured according to EN Standard 12445. If the con-
trol of the "motor force" is used to assist the system for the
reduction of the impact force, try to find the adjustment to obtain
optimal results.
There is a trimmer on the card to establish the triggering threshold of
this the friction; is has to be adjusted so that it comes into action as
soon as a light pressure is applied to the bar in the direction oppo-
site to the way it is moving.
To overcome the initial movement phase that always needs greater
motor power, the STOP_AMPERE friction system is excluded from
the motor start up phase; to evaluate the effect of the adjustment on
the trimmer, you ought to wait until the movement has started and
the bar has reached standard speed.
Keep in mind that, always for a question of safety, if the friction
comes into play three consecutive times, movement is stopped with-
out any reversal. If the automatic functioning mode is selected at the
end of the opening manoeuvre, there is a "pause time" after which a
closing manoeuvre is automatically launched. Pause time is adjust-
ed with the trimmer PAUSE TIME. Pause time is also activated in the
semiautomatic functioning mode when, in the closing phase, the
triggering of a safety device or the STOP_AMPERE friction, causes
a reversal in the opening manoeuvre.
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