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2.4) Notes about connections:
Most connections are simple; many of them are direct connections to
a single user point or contact but others are a little more complicated.
A particular description should be made of the “Phototest” output;
this is the best possible solution in terms of reliability as regards safety
devices and puts the control unit and safety photocells in “category 2”
according to UNI EN 954-1 standard (ed. 12/1998).
Before every manoeuvre is begun, the relative safety devices are
checked and only if everything is in order will the manoeuvre start.
Should the test be unsuccessful (photocells blinded by the sun, short
circuited cables, etc.) the failure is identified and the manoeuvre is not
carried out.
This can only be achieved by using a certain configuration in the safety
device connections that require the photocell transmitter power input
to be connected to terminals 8-9 while the receiver power input should
be derived from the accessories output (terminals 13-14).
When movement is required, it is first checked that all the receivers
involved in the movement give their consent, then the phototest output
is turned off after which it is checked that all the receivers signal the fact
by removing their consent; the phototest output is finally reactivated
and the consent of all the receivers is verified once more.
Synchronism should always be activated on the two transmitters by
cutting the jumpers; this is the only way of ensuring that the two pairs
of photoelectric cells do not interfere with one another.
Check the instructions in the photocell manual regarding
synchronised functioning.
If a PHOTO input is not used (e.g.: PHOTO2) and the phototest
function is required, jumper the unused input with phototest output
terminal n°9.
TX
PHOTO 2
(PIU card)
8
TX
PHOTO
9
RX
RX
14
13
15
PIU (10)
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Once the motor and various accessories have been connected you
can now check all the connections and test the installation.
ATTENTION: the following operations entail working on live
circuits; most of these run on extra-low safety voltage so they
are not dangerous but some are powered by mains voltage
which means they are HIGHLY DANGEROUS! Pay the greatest
of attention to what you are doing and NEVER WORK ALONE!
Work on the control unit should be started in the “manual mode” and
with all the functions deactivated (dip-switches OFF); in all cases,
when working in the manual mode and the control key is released,
the motor will stop immediately. Also check that all the adjustment
trimmers are at a minimum (turned fully anti-clockwise); only the
“FORCE” trimmer can be positioned on maximum.
A)
Unlock the gate and take it halfway the run and then lock it;
now it is free to move in either the opening or closing direction.
B)
Make sure you have selected the correct input voltage on the
terminal board to the left of the overload cut-out.
C)
Power the unit and check that voltage between terminals 13-
14 and 8-9 is 24 Vac.
As soon as the unit is powered the indicator lights (LED’s) on the
active inputs should turn on and shortly after the "OK" LED should
start flashing regularly. If none of these events occur, turn power off
immediately and check the connections more carefully.
The “OK” LED in the centre of the card has the job of signalling the
state of the internal logic: regular flashing at 1 second intervals means
that the internal microprocessor is active and waiting for commands.
When the microprocessor recognises a variation in the state of an
input (whether it is a command or function dip-switch input) it
generates a rapid double flash even if the variation does not have any
immediate effect. Extremely rapid flashing for 3 seconds means that
the control unit has just been powered or is performing internal
testing, lastly, irregular flashing means that the test has been
unsuccessful and that a fault has occurred.
D)
Now check that the NC-contact inputs LED’s are on (all safety
devices active) and that the NO-contact inputs LED’s are off
(no command present); if this is not the case, check the
connections of the various devices and make sure they are in
good working order.
E)
Check that all the safety devices of the unit are in proper
working order (emergency stop, photocells, pneumatic edges,
etc.); each time they cut in, the relative STOP or PHOTO LED
should turn off.
F)
Check the limit switches are connected properly; move the
gate and check that once the required point is reached the
relative limit switch cuts in and switches off the relative LED on
the control unit.
G)
Now make sure that movement is in the right direction, that is,
check that the movement set on the unit corresponds to that
of the wings. This check is of paramount importance. If the
direction is wrong, in some cases (in the semiautomatic 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
manoeuvre, which is normally the most dangerous, and they
will trigger in the opening manoeuvre causing the gate to close
up against the obstacle with disastrous results!
To see whether the direction of rotation is correct, give a short
pulse to the Step-by-Step input; the first manoeuvre the unit
will carry out after being powered is always an OPEN one, so
simply verify that the gate starts opening; if this movement is
incorrect, proceed as follows:
1 – Turn the power off
3) Testing:
!
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