Key Automation 900CT-380 Anleitungen Seite 35

End of Stroke Inputs
900CT-380 control unit allows connecting mechanical ends of stroke
(normally closed contacts) which are activated by the gate motion and
showing to the control unit the position of complete opening or closing.
no End of stroke inputs are disabled.
Si End of stroke inputs are enabled.
Anti-skid
When an opening or closing operation is interrupted by a command or for the
intervention of the photocell, the set-up time for the opposite movement
would be excessive, so the control unit operates the motors only for the time
necessary to recover the actually covered journey. This could be not
sufficient, particularly in the case of very heavy gates, as because of the
inertia at the inversion moment the gate runs an extra space in the previous
direction that the control unit is not able to take into account.
If after an inversion the gate does not return exactly to the starting position,
it is possible to set an anti-skid time that is added to the time calculated by
the control unit in order to recover the inertia.
WARNING: If function ASM is disabled, the gate goes backward until it
comes to the end stops. In this phase the control unit does not activate the
slow down function before the end stops are reached and any obstacle that
comes across after the inversion is considered as an end of stroke.
Activating the obstacle sensor
This menu allows you to regulate the sensitivity of the obstacle
sensor. When the power absorbed by the motor exceeds the level set, an
alarm goes off in the power unit, stops the motor and inverses the motion for
3 seconds.
If no is set, the function is turned off.
Dynamic regulation of the obstacle sensor threshold
activating this function, the power unit automatically adjusts the obstacle
sensor threshold to compensate the increased strain caused by aging
mechanisms or the accumulation of debris.
Allowance on the end stroke
If installation requires the gate to seal against a mechanic end stroke bump
(either when opening or closing), then you have to set an end stroke
allowance: time in which the obstacle sensor does not cause the safety
withdrawal as a result of the bump against the stop, but allows it to conclude
the cycle.
If you set a margin higher than the work times, any kind of obstacle sensor
intervention will cause the interruption of the cycle.
If you set zero, any intervention of the obstacle sensor will cause the gate to
withdraw.
31
By