Nice Mindy A6 Instructions Et Recommandations Pour L'installateur page 11

For obvious safety reasons, when STOP, PHOTOCELL and PHOTO-
CELL 1 or PHOTOCELL 2 (on the PIU' card) or one of the limit switch-
es trigger, there is no gradual stop, being replaced by an ordinary stop.
Switch 9: On = Water hammering
When reversible actuators are used, and hence the gate does not
remain closed with the mere thrust of the motors, an electric lock
has to be installed (see actuator instructions as to use).
Consequently the natural thrust applied to the electric lock might
tend to leave the gate wings slightly ajar, sometimes this thrust is so
great that it keeps the electric lock's triggering mechanism blocked.
With the water hammering function on, a short closing cycle is acti-
vated prior to an opening manoeuvre but it causes no movement
since the gates are already up against the mechanical closing stop.
In this way, when the electric lock is activated, without any force and
therefore ready to trigger.
Switch 10: On = Courtesy light on flashing
In certain cases it might be necessary to illuminate the gate move-
ment area and often it is required that the light turn off automatically
soon after the gate has finished its manoeuvre. This function is com-
monly referred to as the "Courtesy light". By connecting appropriate
light fixtures to the same output as the flashing light (for a maximum
total capacity of 100 W) and activating this function, the output will
remain active, illuminating the area for the duration of the manoeuvre
plus 60 seconds.
Only on the A700F version there is a second set of dip-switches
with other functions:
Switch 11: On = Positioning function (only with the use of the limit
switches)
The limit switches can be used, instead of for signalling movement
limits, for indicating the point in which positioning starts. Normally
when the positioning function is used, the limit switches are installed
at an angle of 10-20° before the mechanical stop. This means that
when the moving wing reaches the limit switch, a reduced force will
be sent to the motor which can be adjusted with the "Positioning
Force" trimmer for an additional 3 seconds so that the gate can
reach the mechanical stop as gently as possible.
Switch 12: On = Flashing also in Pause
The flashing light is normally activated only during the opening and
closing manoeuvres, this function means that the flashing light
remains active also during the Pause Time to signal the "closing
soon" condition.
Switch 13: On = Pressure holding
In the oleodynamic actuators the thrust to keep the gate closed is
developed inside a hydraulic circuit which is constantly under pres-
sure. When time and wear reduce the hydraulic circuit's sealing
effect it could happen that after a few hours the internal pressure
drops and there is the risk of the gate opening slightly.
If the Pressure Holding Function is activated, after 4 hours, and then
for each 4 hours that the gate is closed, a brief closing manoeuvre is
activated with the sole aim of recharging pressure in the hydraulic
circuit.
NOTE: the "Water hammering" and "Pressure Holding" functions
only have sense and are carried out if the gate is closed.
The internal logic considers the gate closed if the relative limit switch,
FCC, has triggered or, if the limit switches are not used, by the fact
that the previous closing manoeuvre was concluded regularly by the
end of the working time.
Switch 14: On = Gate Open Indicator with proportional flashing
The Gate Open Indicator normally signals gate condition as follows:
Off: Gate completely closed
On: Gate only partly open
Slow flashing: Gate starting to open
Fast flashing: Gate closing
The flashing of the indicator light during movement can be rendered
proportional, going gradually from slow to fast and vice versa; this
will provide an indication about the opening and closing state.
Switch 15: On = Phototest activation
This switch starts a test of the photoelectric cells before each move-
ment begins; thus doing, the chance of malfunctioning is eliminated
and plant safety is augmented. In order to take advantage of the
Phototest function the photoelectric cell transmitters must be con-
nected to the corresponding output (see: Note on connections).
Switch 16: On = Photocell and Photocell 1 also in opening
The safety devices PHOTOCELL and PHOTOCELL 1 normally trig-
ger only in the closing manoeuvre; if dip-switch no. 16 is activated,
triggering of the safety devices will cause movement to be interrupt-
ed even in the opening phase; if it is set on Semiautomatic or Auto-
matic, movement in the opening direction will start again as soon as
the last object has passed by the photoelectric cell.
Switch 17: On = Photocell and Photocell 1 at the beginning of the
opening manoeuvre
As a rule the safety devices PHOTOCELL and PHOTOCELL 1 are
only active in the closing manoeuvre and not in the opening manoeu-
vre because the former is the most dangerous. In some countries
there are standards that impose the control of the safety devices at
least at the beginning also of the opening manoeuvre. If such stan-
dards have to be complied with or if you wish to increase the level of
safety, it is possible to activate the function and consequently check,
prior to starting movement, consent given by the PHOTOCELL and
PHOTOCELL 1 safety devices, and only then start movement.
Switch 18: On = Misses STOP in opening
The Step-by-Step cycle is normally: OPEN-STOP-CLOSE-STOP.
With this function on, Step-by-Step becomes: OPEN-CLOSE-
STOP- OPEN, while the Open input loses its possibility to STOP.
Switch 19: On = Misses STOP in closing
This is similar to the previous function but concerns the closing
cycle, hence the Step-by-Step cycle becomes: OPEN-STOP-
CLOSE-OPEN, while the Close input loses its possibility to STOP.
NOTE: By turning dip-switches 18 and 19 ON, the step-by-step
cycle becomes: OPEN-CLOSE-OPEN, losing its possibility to STOP.
Switch 20: On = CLOSE becomes PEDESTRIAN OPEN
It could happen that you do not need to open the gate fully like, for
instance, when a person has to transit; in such a case, the
PEDESTRIAN OPEN function is useful which opens just the one
gate, connected to the 2nd motor, leaving the other one closed.
This type of opening is activated by the CLOSE input which loses its
original function, becoming like the Step-by-Step input, but only for
the opening of one gate. We ought to stress that the pedestrian
opening cycle will only start if the gate is closed; if the gate is mov-
ing or open, the input pulse will have no effect.
ACCESSORY: "PIÙ" EXPANSIONS CARD
The electronic unit is equipped with all the main functions required of
a normal automation, in the A700F version there is also the possibil-
ity of adding the optional PIU card by means of which unit perfor-
mance can be enhanced.
GB
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