Cardin Elettronica ZVL322.02 Mode D'emploi page 20

SOFT TRAVEL LIMITS
The system is designed to operate without mechanical closing travel limits; the work time management
allows the system to control the position of the garage door. The following points however should be
taken into consideration:
1) Due to climatic variations or mechanical wear the performance of the system can change. A work
time programmed without leaving a margin of tolerance (extra time) may not be sufficient to complete
the manoeuvre (in other words, over a period of time the garage door may remain slightly open). To
avoid this situation proceed as follows:
1a) During programming keep the motor under tension for a couple of seconds after the mechanical
opening direction travel limit has cut-in (not more than four seconds).
1b) the programmer automatically allows for a 3-second increase in order to guarantee that during
repeated travel direction inversion manoeuvres the forcing movement of the garage door does
not cause this problem.
Example: with the gate/door completely open
Command sequence: the gate closes for 1 second then opens.
Result: the gate moves in the closing direction for 1 second and in the opening
direction for 1 + 3 seconds, so the motor remains under tension for 3 seconds after the gate is com-
pletely open.
2) During blackouts the programmer will lose the position of the gate/door which will be considered to
be "completely closed", unless the completely open or closed travel limit is active, (see table 1, page 18)
this is so as to allow the opening manoeuvre. The work times are programmed in this transitory phase
in such a way as to guarantee the complete opening of the door and successively complete closing.
Attention! To enable this situation; when the system is restarted with the door not completely closed
the motor will be kept under tension (for longer than normally necessary) during the first cycle. This
remains valid until the cycle has been completed and the door is completely closed. At this point the
programmer will once again know the exact position of the door.
The particular work time management method avoids keeping the motor under tension when it is not
necessary:
Example: double hinged gates
Opening command followed by a closing command after 1 second has elapsed.
As gate 2 still has to start the manoeuvre (2 second gate delay in the opening direction)
motor 2 will not be activated in the closing phase.
If while moving, the gate delay phase has already taken place, once the gates start to move again
after a blocking command this will not be repeated. This always occurs however during travel direction
inversion.
ELECTRIC LOCKING DEVICE
The electric locking device only activates during opening and reopening. This occurs for the each move-
ment command given after start up until the door is completely closed. From this point onwards the
electric lock will only activate when the door is in proximity with the completely closed position (thus
avoiding unnecessary activation)
ELECTRIC LOCKING DEVICE FREEING MOVEMENT
The lock freeing movement, (only for hinged gates) which is active when the gates are completely
closed, forces gate one to move in the closing direction for 1 second in order to allow the lock to free
itself correctly. The lock remains active for 2 seconds (plus a margin of 0,5 seconds) giving time for
gate 1 to move in the opening direction. This only occurs when the gates are completely closed. For all
manoeuvres after a blocking command has been given with the gates open the "lock freeing movement
will not take place" but the electric locking device will be activated.
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