8
2.2.4) Checking connections
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 contain mains voltage which means they are
HIGHLY
DANGEROUS!
Pay the greatest of attention to what you are doing and
NEVER
WORK ALONE!
• Power the unit and check that voltage between terminals 8-9 is
approx. 24Vac.
• Check that the “OK” Led flashes rapidly for a few moments and
then that it flashes at a regular frequency.
• Now check that the Led’s relative to the N.C. (Normally Closed)
contacts are on (all safety devices active) and that the Led’s
relative to the N.A. (Normally Open) inputs 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.
The STOP input switches off both FCA and FCC.
• Make sure the limit switches are connected properly; move the
limit switch lever and check that the relative limit switch cuts in
and switches off the relative Led on the control unit.
• Release the leaf, take it to the halfway point and then block it; it
is now free to move in either the opening or closing direction.
• Now make sure that movement occurs in the right direction, that
is, see whether the movement set on the unit corresponds to
that of the leafs. This check is of paramount importance, if the
direction is wrong, in some cases (in the “Semiautomatic” mode,
for instance) the “Automatic” system 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 against the obstacle with disastrous results!
• To see whether or not the direction of rotation is correct, give a
short pulse to the Step-by-Step (PP) input; the first manoeuvre
the unit will carry out after being powered is always an “Open”
one, so simply verify that the automatic system moves in the
opening direction; if this movement is incorrect, proceed as
follows:
Turn the power off
Turn the motor and the limit switch power connectors
180°. (Ref. “L” and Ref. “G” of
fig.1
)
Once this has been done, check whether the direction of
rotation is now correct by repeating previous point.
The “OK” Led located in the centre of the board has the task of
signalling the status of the internal logic: regular flashing at 1 second intervals
indicates 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 a 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 s means that the control unit has just been
powered or is carrying out internal testing. Irregular flashing, lastly, means that
the test has been unsuccessful and that a fault has occurred.
!
Adjustments can be made with the trimmers that modify the
following parameters:
Working time (TL):
Adjusts the maximum duration of the opening or closing manoeuvre.
To adjust the working time TL, select the “Semiautomatic” operating
mode by moving Dip-Switch 1 to ON and adjust the TL trimmer to
halfway along the travel distance. Then run a complete opening
cycle followed by a complete closing cycle and readjust the TL
trimmer in order to leave enough time for the whole manoeuvre plus
a margin of about 2 to 3 s.
If the trimmer is at maximum and there still is not enough time, cut
the TLM jumper on the printed circuit near the TL trimmer, in order
to provide more working time.
If you wish to use the deceleration function, adjust the Trimmer so
that the deceleration stage starts 50 - 70cm before the limit switch
is triggered.
The modification of the working time will be effective starting with the
next opening manoeuvre.
Pause Time (TP):
In the “Automatic” mode, this adjusts the delay between the end of
the opening manoeuvre and the beginning of the closing manoeuvre.
To adjust Pause Time TP, select the “Automatic” operating mode by
moving Dip-Switch 2 to ON and adjust the TP trimmer as required.
Then carry out an opening manoeuvre and check the time elapsed
before “Automatic” closing manoeuvre.
Force (F):
Take great care when adjusting the Force (F) trimmer as this may
affect the level of safety of the automatic system. Trial by error is
required to adjust this parameter, measuring the force applied to the
leaf and comparing it with regulatory values.
3) Adjustments:
F
TL
TP
TLM
Summary of Contents for ROBO RO1040
Page 2: ...robo...
