Ier Automatic Systems BL52 - Page 22

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BL5x-MT-EN-13 page 22/56
Parameter
Values
Description
OFF
(by default, except for
BL4x)
The obstacle remains mechanically locked, thanks to the
position of the transmission elements between them.
Nevertheless, it is possible to unlock it manually using a
lever or a crank.
ON
(by default for BL4x
only, not adjustable)
The obstacle is unlocked: a pulse is given to take the
transmission elements out of alignment; opening may have
to be effected by hand.
This electrical opening is only available for equipment that
has a reversible motor reduction drive and a frequency
inverter (thanks to the capacitors integrated into the control
board and the frequency inverter).
Note: for BL4x AVR (with automatic opening of the arm in
case of power failure) subjected to great forces (strong
winds or fraud attempts to manually open the arm), the
locking pin might press against the locking clips and prevent
the automatic opening of the lock in case of power failure.
This parameter gives the necessary reversed impulse to
release the lock.
For the BL4x SR (without automatic opening), this parameter
has no effect because the electromagnetic brake will lock
the arm in position in any case.
Warning: this adjustment is incompatible with the Lock
Closed command which has priority and will maintain the
obstacle closed.