TST
Assembly instructions
LGB
FEIG ELECTRONIC GmbH
Page 21 of 26
TST_LGB_Assembly_instructions_rev5_EN.docx
ATTENTION
7
Functions
The TST LGB supports different operating modes. The main difference between modes is the manner that
the door is being blanked.
To be able to use the TST LGB as sole safety unit (protection level E) in accordance with EN 12453
on doors and gates with automatic operation and for use by non-trained personnel the mode "intelli-
gent blanking" must be used.
7.1 Intelligent blanking
In the "intelligent blanking“ mode, the light beams occupied by the door are blanked by their reference posi-
tions.
Therefor Parameter P.433 must be “5”.
The light beams below the door
’s edge monitors the danger zone. This area has a height of three light
beams. These three light beams are scanned at a higher frequency than the lines of the object zone (see
below). Fast scanning supports a response time of less than 10 ms to detect occupancy.
An assignment in the danger zone activates OUT 1.
With the appropriate parameter
configuration, OUT1 results in a “hard stop“ of the door movement
.
The remaining lines of beams below the danger zone are the object zone. These are scanned at a lower
frequency resulting in somewhat slower response times as in the danger zone. These response times are
below 100 ms.
An assignment in the object zone activates OUT2
With the appropriate parameter configurat
ion, OUT2 results in a “Soft Stop" of the door movement.
(Protecting the door’s mechanics).
7.2 Manual blanking of light beams
Manual blanking ranges of light beams can be utilized to deactivate these, beginning from the bottom and/or
from the top.
ATTENTION
Manual blanking may be used only within ranges that are not located in the door
’s area of movement
and that are not accessible to humans or objects.
Blanking from the top: set parameter P.44B to light beams No. “0…. 8” or 0… 1180 mm.
Blanking from below: set parameter P.44C to light beams No. “0…. 28” or 0… 2500 mm.
Parameter “0“ signifies no blanking.
