Plug Detection; Auto Detect Number Of Drives; Collision Detection (Drive Back) - Hettich LegaDrive Operating And Installation Instructions

7. Operation

7.5.5 Plug detection

The control unit detects whether a lifting column is plugged in at
a specific socket. The control unit also detects whether a lifting
column has been changed.
If a lifting column is missing or has been replaced, the control
unit clicks three times. The display also shows a fault code (see
list of faults in Section 8) if the handset has a display.
A manual reset must be performed to rectify the fault, (see Sec-
tion 7.4.4 for further details).

7.5.6 Auto detect number of drives

Besides plug detection, the control unit can also automatically
detect the number of lifting columns plugged in. This feature is
always active during first startup of the control unit and after
returning the control unit to factory settings (see section 7.5.9).
Lifting columns plugged in after the first startup of the control
unit will not be detected automatically. For changing the estab-
lished configuration the control unit has to be returned to factory
settings.
Possible situations:
· The control unit is being used for the first time
· The control unit has been returned to factory settings

7.5.7 Collision detection (Drive back)

The desk top automatically changes its position by a defined dis-
tance in the opposite direction after triggering a safety function
(through collision detection ISP or optional accessory, e.g. crush
guard). This prevent parts of the body from being permanently
trapped.
Note
i
The drive back function is only active if a collisi-
on detector (ISP or optional accessory, e.g. switch
or crush guard) is available.
Warning
Warning!
In spite of ISP collision detection there is still
a risk of getting crushed in exceptional cases
as motor shutdown is not only governed by the
control unit but also by the interaction of all
components of the electrically height adjustab-
le workstation! Deactivation sensitivity is also
influenced by the mechanical components, motor
and ambient conditions!
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