Device description
Leuze electronic
LES 36
34
TNT
35/7-2
4
V
4.4
Analysis Window (AW)
In addition to the EAWs, four AWs can be configured with the LES. In AWs, only object detec-
tion is possible.
During object detection, the number of measurement points in an AW is determined and
compared with two adjustable limits. From this, the logical object detection state
ok
or
not
ok
of the AW is determined. If there are not enough measurement points in the AW, the
object detection state is
not ok
. Configuration of the object detection in EAWs/AWs is
performed with
LESsoft
(
Edit Analysis Windows
->
Analysis Window Defini-
tions
). The position and size of the AW are configured here for each AW.
For unique object detection, it may be necessary to combine AWs or EAWs. For this
purpose, the LES offers the AND combination and inversion of multiple analysis windows.
The configuration of applications with additional object detection with logic combinations
is performed with
LESsoft
(
Edit Logical Combinations
->
AW Logic
panel).
The result of combinations can be output via PROFIBUS or Ethernet. Detailed evaluation
results such as, e.g., the status of all EAWs/AWs, the number of measurement points within
the EAW/AW and the state of the complete object detection are transmitted via Ethernet.
For more information please refer to Chapter 10 and Chapter 11.
Note!
An object detection is carried out only within the active EAWs. Areas outside of the mea-
surement range and field of view are likewise not evaluated. An object is detected if the
number of measurement values in the EAW reaches or exceeds an arbitrarily defined mini-
mum value.
Note!
The number of hit points does not necessarily correspond with the object size, since the num-
ber of hit points is dependent on distance
z
. At near distance to the sensor (e.g., 300 mm),
an object expanded in the X direction has nearly twice as many hit points as it does at a far
distance (e.g, 600mm). If the object distance is the same, the number of hit points remains
nearly constant.
