Nice MINDY A6-A6F Manual De Instrucciones página 32

English
Switch 8:
When movement finishes, a gradual stop is carried out, sending a diminishing force to the motor with a decrement that lasts about
1 second; this guarantees a jolt-free stop.
For obvious safety reasons, when STOP, PHOTOCELL and PHOTOCELL 1 or PHOTOCELL 2 (on the PIU' card) or one of the
limit switches trigger, there is no gradual stop, being replaced by an ordinary stop.
Switch 9:
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 activated 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:
In certain cases it might be necessary to illuminate the gate movement area and often it is required that the light turn off
automatically soon after the gate has finished its manoeuvre. This function is commonly 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
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
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
In the oleodynamic actuators the thrust to keep the gate closed is developed inside a hydraulic circuit which is constantly under
pressure. 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
The Gate Open Indicator normally signals gate condition as follows:
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
This switch starts a test of the photoelectric cells before each movement 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 connected to the corresponding output (see: Note on connections).
32
On = Gradual stop
On = Water hammering
On = Courtesy light on flashing
On = Positioning function (only with the use of the limit switches)
On = Flashing also in Pause
On = Pressure holding
On = Gate Open Indicator with proportional flashing
Off : Gate completely closed
On : Gate only partly open
Slow flashing : Gate starting to open
Fast flashing : Gate closing
On = Phototest activation