SICK LMS400, Онлайн руководство пользователя

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© SICK AG · Germany · All rights reserved · Subject to change without notice
8011984/YSZ3/2016-02-04
Chapter 3
Configuration
Online help
LMS400 laser measurement sensor
3.6.4 Filter for the Level Control application
Z median filter
The Z median filter forms a 3 by 3 median from the Z values for the measured points (and
not, like the median filter, from the polar distance values).
How to activate the Z median filter:
Interval distance
At large column lengths and low conveyor speed a quantity of scans will be obtained that is
inappropriate for the evaluation of a column in the X direction. For this reason with the aid
of an interval you can define the magnitude of the distance between two scans that are to
be used for the measurement.
How to configure the interval distance:
3.7 Digital inputs/Trigger
Using the settings on the device page you can define whether the start and end of the
measurement are defined by triggers.
You can select whether the settings for the triggering are to be time or distance controlled.
You can define the sources for the triggering and if necessary the logic and debounce for
the digital inputs.
You can also define whether the laser in the LMS400 is switched on by a trigger or remains
switched on continuously.
3.7.1 Operating principle of the LMS400
Note You can only change the settings if the Level Control application is activated (see 3.2 on
page 8 ).
The settings define what determines the start and end of the measurement.

Free running
In case of free running operating mode, measured value messages are output after the
LMS400 has received the measured value request until the output of measured values
is stopped by a stop message. Measurements are performed continuously or with
internal gate between the reception of the measured value request and the reception
of the stop message (see
3.7.7 on page 22 ).

Triggered (gate)
If you use an external gate, then the start and end of the gate (that is e.g. switching on
and off a photoelectric switch on a digital input) define the length of the columns.
 Open in the P
ROJECT TREE
, LMS400-XX00, P
ARAMETER
the device page F
ILTER
.
 Select there in the L
EVEL
C
ONTROL
area the option A
CTIVATE
Z-
MEDIAN FILTER
.
 Open in the P
ROJECT TREE
, LMS400-XX00, P
ARAMETER
the device page F
ILTER
.
 Enter there in the L
EVEL
C
ONTROL
are in the I
NTERVAL DISTANCE
field the necessary value
in mm.