Telcoma Automations T201 Instructions Pour L'installation page 56

GB
PHOTO TEST
The foto test is a special function for checking the efficiency of the photocells prior to every movement.
For the foto test to work, the system must have two power supply lines for the photocells: the first is connected to
terminals 12 and 13 and powers the receivers, while the second is connected to terminals 14 and 15 and powers the
transmitters. The foto test function must be enabled by putting the dipswitch No. 7 to the ON position (det. 14 of fig. 1).
In practice the control unit cuts off the power supply, to the transmitter, for an instant and checks that the receivers
change state. If everything is in correct and in working order, the motors start and gate movement begins; if the receiver
has a problem, the cycle is stopped and indicated by several fast blinks of the open gate indicator light.
NOTES:
- The foto test also operates with the photocell 3 (wild input).
- With the foto test enabled and the control unit in stand-by, the photocell transmitters are not powered
and the inputs FT1 and FT2 are open (LEDs off). In this condition, it is still possible to check photocell
operation by short-circuiting the photocell "Test" pins (det. 7 of Fig. 1).
SETTING THE FUNCTIONS (tab. 2)
The control unit is already set with a standard configuration as seen in det. 14 of fig. 1.
Options to the standard operation may be selected by setting the dipswitch functions differently (det. 14 of fig. 1).
It should be noted that the power supply to the control unit should be cut off and then reconnected
(RESET) before the new settings can be memorised.
ENCODER
The control unit is equipped with encoder input.
This device enables precise adjustment of gate movement; anti-crushing is thus ensured throughout the entire travel of the
gate , including slow-downs, with no need for the MAS200 card.
With the help of the motor encoders, the control unit detects when any motor is mechanically blocked: consequently it
reverses the direction of the motor (and gate) for a few seconds. The manoeuvre following any activation of the safety
device is always contrary to the one that was previously in progress. For example, if the motor is blocked during an opening
manoeuvre, it will automatically carry out a brief closing manoeuvre. If the P/P button is pressed at this point, it will start
closing again.
Connect the motor encoders to the T201 terminals as shown in fig. 2 and TABLE 1.
During the programming of the gate travel, the flashing of Led L1 signals that the control unit has detected the presence of
the encoder. On the other hand, steady burning Led L1 signals that the control unit will not operate with the encoder.
MAS200 CARD (anti-crushing – det. 3 fig. 1)
This optional card fulfils the same purpose as the encoder with respect to the anti-crushing function, with the
following limitations:
- it does not operate when the motor is decelerating
- it does not operate in the last part of the opening and closing travel of the gate if there are no electric limit
switches.
NOTES:
- There is a separate setting of the MAS200 card for each motor (see MAS200 instructions)
- If the motor is not connected, or is not connected properly, the MAS200 card cuts in continuously.
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