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
3.7.4 Gate
The LMS400 provides several trigger sources for gate control. These can start or stop the
measurement immediately or initiate a delayed start and/or stop of the measurement.
SOPAS ET provides several trigger sources for gate control:

digital inputs

software trigger

CAN BUS

test trigger (see 3.7.6 “Advanced I/O settings” on page 22 )

triggering by the LMS400 master
The trigger sources can stop or start the measurement immediately, or trigger a delayed
measurement start and/or stop.
In addition, you can extend the gate produced by the triggering with a so-called expansion
distance.
Note Depending on whether the measurement is triggered time or track controlled (see 3.7.2
“Common settings” on page 19 ), you can enter the delay and expansion as a distance or as
a time.
Example:
A photoelectric switch is mounted 1000 mm in front of the scan line. You initialise the start
of the measurement on the entry of the object into the photoelectric switch. You initialise
the measurement when the object leaves the photoelectric switch.
1000 mm are entered as the distance delay. In this way the measurement is actually only
started when the object reaches the scan line, and only stops when it leaves the scan line.
If an expansion distance of 50 mm is now entered, the measurement starts 50 mm
before
the object reaches the scan line and stops 50 mm after it leaves the scan line.
You can start and stop the measurement using one trigger source or you can use one trigger
source to start and a second to stop the measurement.
How to configure a gate:
Gate for the Level Control application
In the Level Control application the start and stop of the gate (that is e.g. switching on and
off a photoelectric switch) define the length of the columns or the length over which
columns are generated (see
3.7.7 on page 22 ).
On this subject please read section “Control of the measurement process using a gate” in
the chapter “Product description” of the LMS400 operating instructions.
 Open in the P
ROJECT TREE
, LMS400-XX00, P
ARAMETER
the device page D
IGITAL
I
NPUTS
/T
RIGGER
.
 In the G
ATE SETTINGS
area in the S
TART TRIGGER SOURCE
and S
TOP TRIGGER SOURCE
selection
field select the source for the triggering.
 Configure as necessary
DISTANCE DELAY
and
EXPANSION DISTANCE
.
On this subject please read the section “ Evaluation in X direction ” in the chapter “Level
Control” of the LMS400 operating instructions.