KONE UniDrive
TM
service manual vs 9 49
2.7. Safeties
2.7.1. Side screen protection
Together with the Photocell test, any input programmed at Side screen protection (TST_Safety Slow or
TST_Safety Stop will be tested as well.
This happens by switching the “test 12/24V” output witch is available close to the input 1-4 connections. When the
“test 12/24V” is switched, a reaction from the connection “12/24V Test > Sensor reaction” is expected. When no
(proper) reaction is detected, an error is generated.
2.7.2. Obstacle detection
To meet either current or future EN-normative regulations, the UniDrive
TM
software is supplied with a obstacle
detection system. An obstacle detection signal is generated whenever:
- Force to move the door will exceed certain limits,
- Door speed is reduced by an external force,
- Difference between requested speed and current speed will be (and stay) more than a certain limit.
- When movement direction is opposite the expected direction.
The obstacle detection sensitivity (height of the limits) can be set separately for both closing and opening of the
door.
In practice the obstacle detection signal is generated before the door is fully stopped by the user.
When the speed of the door is reduced by an external force (user) the UniDrive
TM
control box will rapidly reduce
the door speed down to zero, so dynamic forces are reduced as much as possible.
2.7.3. Obstacle detection closing
When the obstacle detection signal is generated during the closing cycle of the door, the movement of the door is
stopped as soon as possible.
At a closing door, the door will now open at normal speed, stay open for the time defined by the Stay open timer
added with the self-increasing obstacle timer.
The self-increasing time is defined as Stay-open timer + x-times event. (2-4-8-12 seconds)
When the door closes, it will run in low speed
When the closing movement is interrupted by an obstacle detection signal at the same position for more than 3
times in a row, the door will use this point at a virtual closing position.
The exact position is stored in the UniDrive
TM
control box memory.
2.7.4. Obstacle detection opening
When the obstacle detection signal is generated during the opening cycle of the door, the movement of the door is
stopped as soon as possible.
The door will stay at this position for 2 sec. and a self-increasing time, then the door will try to open again.
The self-increasing time is defined as Stay-open timer + x-times event. (2-4-8-12 seconds)
When the opening movement is interrupted by an obstacle detection signal at the same position for more than 5
times in a row, the door will no longer try to open but starts closing
Next open movement within 30 seconds will be carried out in low speed.
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