SICK LMS400 Reference guide

ONLINE HELP
LMS400
LASER MEASUREMENT SENSORS

2© SICK AG · Germany · All rights reserved · Subject to change without notice 8011984/YSZ3/2016-02-04
Software version Online help
LMS400 laser measurement sensor
LMS400 Software version described
Software/tool Function Status
Device description LMS400-
XXXX (jar file)
Device specific software
module for SOPAS ET
V 01.01.20 or higher
SOPAS ET Configuration software V 03.00 or higher
Copyright
Copyright © 2006 - 2016
SICK AG Waldkirch
Erwin-Sick-Str. 1
79183 Waldkirch
Germany
Trademarks
Windows 98, NT 4.0, 2000, XP, 7, 8, 10 and Internet Explorer are registered trademarks of
Microsoft Corporation in the USA and other countries.

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Online help
LMS400
Contents
Table of contents
1 About this document ............................................................................................... 5
1.1 Function of this document .......................................................................................... 5
1.2 Target group ................................................................................................................5
1.3 Depth of information ................................................................................................... 5
1.4 Symbology used .......................................................................................................... 5
2 For your safety ......................................................................................................... 6
2.1 Authorised personnel .................................................................................................. 6
2.2 General safety notes and protective measures ........................................................ 6
3 Configuration ........................................................................................................... 7
3.1 Preparing the configuration ........................................................................................ 7
3.2 Application ................................................................................................................... 8
3.3 Position ........................................................................................................................ 9
3.4 Basic parameters ...................................................................................................... 12
3.5 Advanced parameters ............................................................................................... 15
3.6 Filter ........................................................................................................................... 16
3.7 Digital inputs/Trigger ................................................................................................ 18
3.8 Encoder and synchronization ................................................................................... 22
3.9 Interfaces ................................................................................................................... 23
4 Level Control .......................................................................................................... 26
4.1 Column width ............................................................................................................. 26
4.2 Column length ........................................................................................................... 27
4.3 Evaluation result ....................................................................................................... 29
4.4 Output message ........................................................................................................ 31
5 Monitor ................................................................................................................... 32
5.1 Scan view ...................................................................................................................32
5.2 Display of the Level Control application .................................................................. 33
6 Service ................................................................................................................... 36
6.1 Version information ................................................................................................... 36
6.2 Operating data ........................................................................................................... 36
6.3 System status ............................................................................................................ 36
7 Glossary ................................................................................................................. 37
8 Index ....................................................................................................................... 39

4© SICK AG · Germany · All rights reserved · Subject to change without notice 8011984/YSZ3/2016-02-04
Figures and tables Online help
LMS400 laser measurement sensor
Abbreviations
BCC Block Character Check
CAN Controller Area Network = standardised fieldbus system with message-based protocol for
exchanging data
CS Checksum
EEPROM Electrically Erasable Programmable Read-only Memory
FSI Fast Serial Interface = SICK proprietary communication interface
HTML Hypertext Markup Language = page description language on the Internet
LED Light Emitting Diode
LMS SICK AG laser measurement sensor
RAM Random Access Memory = volatile memory with direct access
RIS Remission Information System
ROM Read-only memory (permanent)
SOPAS ET SICK OPEN PORTAL for APPLICATION and SYSTEMS Engineering Tool = configuration
software for the configuration of the LMS400
Figures
Fig. 1: LMS coordinates above a conveyor system .........................................................10
Fig. 2: Gamma angle .........................................................................................................11
Fig. 3: Measurement area ................................................................................................12
Fig. 4: Measured value quality as a function of scan frequency
and angular resolution ...........................................................................................13
Fig. 5: Scanning area of the LMS400 ..............................................................................14
Fig. 6: Errors in the entry of the scan area ......................................................................15
Fig. 7: Scan view ................................................................................................................33
Fig. 8: Display of the Level Control results ......................................................................34

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Online help
LMS400
Figures and tables
1About this document
Please read this chapter carefully before working with this documentation and the
LMS400 laser measurement sensor.
1.1 Function of this document
This document provides technical personnel information on the configuration and
diagnostics on the LMS400 laser measurement sensor using the SOPAS ET configuration
software.
1.2 Target group
The target group for this document are people such as technicians, service technicians and
engineers who configure and perform diagnostics on the LMS400.
1.3 Depth of information
This document contains information on the configuration, diagnostics and troubleshooting
on the LMS400 laser measurement sensor with the aid of the SOPAS ET configuration
software.
Planning and using measurement sensors such as the LMS400 also require specific
technical skills which are not detailed in this documentation.
When operating the LMS400 laser measurement sensor, the national, local and statutory
rules and regulations must be observed.
1.4 Symbology used
Recommendation Recommendations are designed to give you assistance in the decision-making process with
respect to a certain function or a technical measure.
Note Refer to notes for device special features.
Explanation Explanations provide background knowledge on technical relationships.
MENU COMMAND This typeface indicates a term in the SOPAS ET user interface.
Terminal output This typeface indicates messages that the LMS400 outputs via its aux interface.
Take action … Instructions for taking action are shown by an arrow. Read carefully and follow the
instructions for action.
This symbol refers to additional available documentation.
ATTENTION
Warning!
A warning indicates an actual or potential hazard. They are designed to help you to prevent
accidents and to protect the device from being damaged.
Read carefully and follow the warning notices!
References to the software show you where to you can make the related setting in SOPAS
ET.

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Chapter 2For your safety Online help
LMS400 laser measurement sensor
2For your safety
This chapter deals with your own safety and the safety of the equipment operators.
Please read this chapter carefully before configuring the LMS400.
2.1 Authorised personnel
The LMS400 laser measurement sensor must be configured and commissioned only by
adequately qualified personnel.
The following qualifications are necessary for the various tasks:
knowledge on the use and operation of devices in the related application (e.g.
conveyors)
knowledge on the software and hardware environment in the related application (e.g.
conveyors)
basic knowledge of the Windows operating system
basic knowledge of an HTML browser (e.g. Internet Explorer)
experience in data transmission modes
2.2 General safety notes and protective measures
ATTENTION
Safety notes
Please observe the following items in order to ensure the correct and safe use of the
LMS400 laser measurement sensor.
The notices in this online help (e.g. on use, mounting, installation or integration into the
existing machine controller) must be observed.
National/international rules and regulations apply to the installation, commissioning,
use and periodic technical inspections of the laser measurement sensor, in particular:
– work safety regulations/safety rules
– other relevant health and safety regulations
Manufacturers and operators of the sensor are responsible for obtaining and observing
all applicable safety regulations and rules.
The tests must be carried out by specialist personnel or specially qualified and
authorised personnel and must be recorded and documented to ensure that the tests
can be reconstructed and retraced at any time.

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LMS400
Configuration
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Chapter 3
3Configuration
The LMS400 laser measurement sensor is adapted to the on-site measurement situation
by means of the configuration. You can configure and test the measurement properties, the
analysis behaviour and the output properties of the sensor as required.
Note Along with the interactive configuration with the aid of SOPAS ET, you can also configure the
LMS400 using configuration messages.
Save parameters permanently
The data are initially saved in RAM in the sensor so that you can check the effect
immediately. On completion of the configuration, you must save the parameters in the
EEPROM of the LMS400.
How to save the parameters permanently in the LMS400:
3.1 Preparing the configuration
To configure the LMS400 laser measurement sensor, you need:
SOPAS ET configuration software (not included in scope of delivery).
See Internet under: www.sick.com/sopas
PC/notebook (Windows 98, NT 4.0, 2000, XP, Vista, 7, 8 or 10) with Ethernet interface
(RJ45) and optional serial interface (RS232).
Device not included in scope of delivery.
Optional for configuration via serial interface (RS232): a threecore RS232 connection
cable (null modem cable) for connecting PC and LMS400.
Cable not included in scope of delivery.
How to prepare the configuration:
Ensure that the LMS400 laser measurement sensor has been correctly assembled and
that the electrical connections are also correct.
Plan all required settings (operating modes, beam coding, resolution, measured value
filtering, trigger etc.).
On this subject please read section “Data communication using messages” in the chapter
“Product description” of the LMS400 operating instructions.
ATTENTION
Don’t switch off the voltage supply during configuration!
Switching off the voltage supply during configuration causes all parameters already
configured to be lost.
From the LMS400-XX00 menu, choose the command PARAMETER, SAVE PERMANENT.
In this way the parameters are saved in the EEPROM in the LMS400 and will also be
available after the device is switched off and on again.

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Chapter 3Configuration Online help
LMS400 laser measurement sensor
Connect the PC/notebook with the aux interface of the LMS400. The connection of the
PC is described in chapter “Electrical installation” in the LMS400 operating
instructions.
Install the SOPAS ET configuration software.
Note The second generation of SOPAS ET (version 2.38.3) can continue to be used, although
support for it is no longer being provided. To receive updates or support, please use the
latest version, i.e., the third generation of SOPAS ET (version 3.xx).
Download and installation of SOPAS ET
The configuration software SOPAS ET, the current system prerequisites for the PC, and the
instructions for downloading the software and the device description file(s) can be found in
the Web at: www.sick.com/sopas.
1. Start PC.
2. Download and install version V3.x of the SOPAS ET configuration software from the
online product page for the software by following the instructions provided there.
Administrator rights may be required on the PC to install the software.
3. Start the “SOPAS ET” program option after completing the installation.
Path: C:\Program Files (x86)\SICK\SOPAS ET\SopasET.exe or via Windows search.
4. Install the device driver (SDD) in the device catalog using the wizard (gear symbol). The
*.jar file can be obtained from the online repository if an Internet connection is present.
5. In the device search list, establish a connection between SOPAS ET and the LMS400
using the search settings. To do this, select the LMS4xx family of devices and select the
default IP address 192.168.0.1 when connecting for the first time. The device is
detected and can now be integrated into a project for configuration purposes.
Note The installation file for SOPAS ET and the *.jar file for the device driver can also be
exported to a data card in order to install them on another PC when there is no Internet
connection.
The LMS4xx does not support Automatic Private IP Addressing (auto-IP). For this reason,
the device is not detected by the default search. To ensure the device search is
successful, the correct IP address and a sufficiently precise address range must be
specified. It is possible to save a search setting that has been set up specifically for this
purpose under a separate name (default: IP address = 192.168.0.1, subnet mask =
255.255.255.0).
3.2 Application
The LMS400 can be operated in two modes:
as a laser measurement sensor for the acquisition and output of pure measured data,
e.g. to a host
using the Level Control application for completeness and contents checks, e.g. on
containers
If you select the Level Control application, additional and different parameters will be
displayed:
see section 3.3 “Position” on page 9
see chapter 4 “Level Control” on page 26
On this subject please read the chapter “Level Control” of the LMS400 operating
instructions.

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Chapter 3
see section 3.6.4 “Filter for the Level Control application” on page 18
see section 3.7.7 “Internal gate” on page 22
How to select the Level Control application:
3.3 Position
Note The POSITION device page is only displayed if you have activated the Level Control application
(see 3.2 on page 8).
On this device page you can enter the coordinates and angle of the LMS400 over the
conveyor system and in this way define the zero point for the system.
You can also define the relevant working area as the measurement area.
3.3.1 Coordinates
As delivered the zero point for the distance measurement is at the origin of the laser
(marked by a dot on the top and underside of the housing).
The Level Control application requires a global zero point to which all other settings refer
(e.g. right edge of the conveyor system as seen in the transporting direction). You can define
this zero point with the aid of the X, Y and Z coordinates.
As a rule this zero point is at the bottom right edge of the conveyor system as seen in the
transporting direction.
Fig. 1: LMS400 coordinates above a conveyor system
X coordinate
Enter the value 0 mm in the field.
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page APPLICATION.
In the APPLICATION field select the option LEVEL CONTROL.
The additional device pages for the application are displayed in the project tree.
LMS400
y
z

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LMS400 laser measurement sensor
Y coordinate
Enter in the field the distance between the vertically incident beam and the zero point
for the measurement.
A plumb line positioned in the middle of the sensor is helpful.
Z coordinate
Enter in the field the distance from the zero point for the measurement to the top edge
of the transporting area.
Note There is an installation setup for the configuration of the position of the LMS400. Start the
assistant on the LMS400_XX00 menu, COMMISSIONING, START INSTALLATION HELP.
How to define the coordinates:
3.3.2 Angle
Using the fields on the device page you can define the angle at which the LMS400 is
mounted in relation to the conveyor system.
Alpha
Enter 90° for the ALPHA angle.
Beta
Enter 0° for the BETA angle.
Gamma
Read the angle GAMMA on the mounting kit for the LMS400, in general this angle is 0°.
Note An installation setup is available for the definition of the angle Gamma. Start the assistant
on the LMS400_XX00 menu, COMMISSIONING, START INSTALLATION HELP.
On this subject please read the section “Determining the coordinates using the installation
setup” in the chapter “Level Control” of the LMS400 operating instructions”.
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page POSITION.
Enter the related values in the X COORDINATE, Y COORDINATE, Z COORDINATE fields.
On this subject please read the section “Determining the coordinates using the installation
setup” in the chapter“Level Control” of the LMS400 operating instructions.

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Chapter 3
Fig. 2: Gamma angle
How to define the angles of the LMS400:
3.3.3 Measurement area
You define the working area relevant for the Level Control application as the measurement
area. You define for this measurement area a left and right border as well as a top and
bottom border. All four values refer to the global zero point defined previously.
Fig. 3: Measurement area
Notes Ensure that the zero point is on the right and Y extends to the left. For this reason the
value for the left border is always greater than the value for the right border.
The bottom border can also have a negative value, e.g. to include the conveyor system
in the evaluation.
Gamma
Z
LMS400
Y
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page POSITION.
In the ANGLE area enter the values for the measurement area borders in the fields.
Top border,
e.g. 500 mm
Bottom border,
usually 0 mm
Right border,
usually 0 mm
Left border,
e.g. 1200 mm
Measurement
area
Zero point

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LMS400 laser measurement sensor
All measured values outside the measurement area are invalid and are not taken into
account.
How to define the measurement area:
3.4 Basic parameters
To be able to perform measurements with the LMS400, the basic parameters must be
configured. For this purpose configure the size of the scanning area, the angular resolution
and the scanning frequency in the scan settings.
3.4.1 Current device parameters
The CURRENT DEVICE PARAMETER area indicates the scanning frequency and the angular
resolution actually set and the resulting measured value quality.
Note Values are only displayed if you configure a device online, that is the PC is connected to the
device.
Measured value quality
You cannot configure the measured value quality directly. The sensor calculates the
measured value quality based on the configured angular resolution and the scanning
frequency.
The measured value quality should ideally be 7. A higher value corresponds to a better
measured value quality. If the measured value quality determined from the parameters is
lower than 7, the sensor is no longer compliant with the values given in the technical data.
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page POSITION.
In the MEASUREMENT AREA area enter the values for the measurement area borders in the
fields.

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Chapter 3
At a high scan frequency and fine angular resolution, the sensor provides more measured
values with a tendency to a lower measured value quality than for a coarse angular
resolution and low scan frequency. You can estimate the achievable measured value quality
based on the following diagram.
Fig. 4: Measured value quality as a function of scan frequency and angular resolution
How to display the current device parameters:
Scanning frequency wizard
Determine scanning frequency and angular resolution using the scanning frequency wizard.
There are two options in the scanning frequency wizard:
Choose the option ANGULAR RESOLUTION and in the VALUE field enter the required angle
in °.
Choose the option FREQUENCY and in the VALUE field enter the required frequency in Hz.
Various configuration options are displayed in the next step. The recommended options
(measured value quality 7) have a green dot in the RECOMMENDED column.
Recommendation Choose the configuration that provides the highest measured value quality.
Once you have completed the wizard the new parameters will be displayed in the CURRENT
DEVICE PARAMETER area.
Angular resolution
Scanning frequency
Better measured
value quality
Lower measured value quality
Measuredvaluequality7
In the LMS400 operating instructions in the section “Measured value quality” of the chapter
“Product description” you will find tables with the measured value qualities given by the
angular resolution and scanning frequency.
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page BASIC PARAMETER.
The CURRENT DEVICE PARAMETER area indicates the SCANNING FREQUENCY and the ANGULAR
RESOLUTION actually set and the resulting MEASURED VALUE QUALITY.

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How to open the scanning frequency wizard:
Note On master/slave operation (see “Master/slave configuration (synchronization)” on
page 22), master and slave must be configured to the same scanning frequency and
angular resolution.
3.4.2 Scan settings
Scanning area
The scanning area of the LMS400 covers an angle of maximum 70°, the minimum starting
angle is 55° (see Fig. 5). Using the STARTING ANGLE and ANGULAR RANGE fields you can adjust
the scan area.
Fig. 5: Scanning area of the LMS400
How to define the scanning area:
Explanation The values that can be entered are dependent on each other. If, for example, 95° are given
as the STARTING ANGLE, the ANGULAR RANGE can only be a maximum of 30°. If, for instance you
enter 60° as the angular range, the starting angle can be a maximum of 65°.
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page BASIC PARAMETER.
Click in the CURRENT DEVICE PARAMETER area the SCANNING FREQUENCY WIZARD button.
Starting angle 55°
to 123°
Angular range 2° to 70°
55° 123°
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page BASIC PARAMETER.
In the SCAN SETTINGS area enter a value between 55° und 123° in the STARTING ANGLE
field.
Enter a value between the maximum 70° und minimum 2° in the ANGULAR RANGE field.

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Chapter 3
Invalid entries are displayed in SOPAS ET with a red border (see Fig. 6).
Fig. 6: Errors in the entry of the scan area
3.4.3 Other settings
In the MISCELLANEOUS SETTINGS area you can define a device name for the LMS400. The
device name will then be displayed on the project tree. Use this field, for example, to make
it easier to differentiate between different applications.
How to enter a device name:
If the PC is connected to the LMS400 and the device is switched online, the device name is
displayed in the project tree.
3.5 Advanced parameters
Note The advanced parameters are only available in the “Authorised client” user level.
Enable extended RIS detectivity
If you want to measure objects with remission values smaller or higher than the values given
in the data sheet for the LMS400, you can extend the so-called Remission-Information-
System (RIS) in the LMS400. In this way the RIS facilitates, e.g., the improved detection of
dark or lighter bodies with reduced accuracy.
For measured values that are measured using extended RIS detectivity the following
applies:
The distance value may not have the defined measuring accuracy.
The same measurement point/the same object will not necessarily be detected by
another LMS400 because the remission value determined is dependent on the factory
calibration of the sensor, outside the specified range the calibration may be subject to
minor variations.
With extended RIS detectivity, your application must therefore evaluate, based on
additional criteria, whether the distance value is to be used or not.
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page BASIC PARAMETER.
In the MISCELLANEOUS SETTINGS area enter a device name with a maximum of 16
characters in the DEVICE NAME field.
Press the Return key.
On this subject please read the section “Extended RIS detectivity” in the chapter “Product
description” of the LMS400 operating instructions .

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LMS400 laser measurement sensor
How to activate the extended RIS detectivity:
3.6 Filter
The LMS400 has digital filters for the pre-processing and optimisation of the measured
distance values.
Notes You can combine the filters as required.
If several filters are active, then the filters act one after the other on the result of the
previous filter. The processing in this case follows the following sequence:
– edge filter
– median filter
–rangefilter
–mathematicalfilter
Active filter functions change the measured values that are output. It is not possible to
convert filtered output values back to the original measured values.
3.6.1 Contour filter
Edge filter
The edge filter prevents incorrect/extreme distance values at edges that result from it not
being possible to determine a distance value for the previous or next point (e.g. if the
previous/next measured point was too dark or outside the measuring range of 3 metres).
With the edge filter enabled, the LMS400 also sets a distance value to 0 at each edge.
Note Using the edge filter, points can be completely suppressed at the outer edges of the object.
In this case the width determined for an object is too narrow by up to 2 × the angular
resolution.
How to activate the edge filter:
Open in the PROJECT TREE, LMS400-XX00, PARAMETER, BASIC PARAMETER the device page
ADVANCED PARAMETERS.
Select there in the ADVANCED DEVICE PARAMETERS area the option DARK or LIGHT.
On this subject please read the section “Edge filter” in the chapter “Product description” of
the LMS400 operating instructions.
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page FILTER.
Select there in the CONTOUR area the option ACTIVATE EDGE FILTER.

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Chapter 3
Median filter
Note The median filter is not available if on the APPLICATION device page the LEVEL CONTROL option
was selected (see 3.2 “Application” on page 8).
The median filter reduces individual extreme values over the entire measurement line by
outputting the median for each measurement point (not: the mean/average) from a 3 × 3
matrix. The matrix comprises nine measured values: The distance values for the point and
its neighbouring points, as well as the distance values determined for these points in the
previous and subsequent scan.
How to activate the median filter:
3.6.2 Range filter
Note The range filter is not available if on the APPLICATION device page the LEVEL CONTROL option
has been selected (see 3.2 “Application” on page 8).
The range filter reduces the number of valid measured values by only outputting distance
values that are within a specific distance range. For other measured values the filter
delivers the distance value 0 and the remission value 0 as the result.
How to activate the range filter:
3.6.3 Mathematical filter
The mean filter smooths the distance value. For this purpose the filter forms the arithmetic
mean over several scans. The number of scans can be configured.
Recommendation Use the mean filter together with the median filter. In this way individual outliers will be
smoothed in advance by the median filter.
How to activate the mean filter:
On this subject please read the section “Median filter” in the chapter “Product description”
of the LMS400 operating instructions.
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page FILTER.
Select there in the CONTOUR area the option ACTIVATE MEDIAN FILTER.
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page FILTER.
Select there in the RANGE area the option ACTIVATE RANGE FILTER.
In the MIN. MEASUREMENT DISTANCE field enter a value of at least 700 mm and maximum
3000 mm.
Then in the MAX. MEASUREMENT DISTANCE field enter a value larger than the value in the
MIN. MEASUREMENT DISTANCE field and maximum 3000 mm.
On this subject please read in the LMS400 operating instructions chapter “Product
description”, section “Mean filter”.
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page FILTER.
Select there in the MATHEMATICAL area the option ACTIVATE MEAN FILTER.
In the NUMBER OF AVERAGED SCANS field enter a value of at least 2 and maximum 100.

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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 PROJECT TREE, LMS400-XX00, PARAMETER the device page FILTER.
Select there in the LEVEL CONTROL area the option ACTIVATE Z-MEDIAN FILTER.
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page FILTER.
Enter there in the LEVEL CONTROL are in the INTERVAL DISTANCE field the necessary value
in mm.

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Chapter 3
3.7.2 Common settings
In the COMMON SETTINGS area you can select whether the remaining settings for the triggering
are to be time or track controlled.
Note The method of control can only be changed in the “Service” user level.
In the case of time-dependent control, enter the debounce, delay, etc. in ms.
In the case of track-dependent control, enter the debounce, delay, etc. in mm.
The debounce, delay, etc. are determined for track controlled triggering using the actual
distance determined by the encoder (see 3.8.2 on page 23). Velocity fluctuations in the
conveyor system are then irrelevant.
How to define the general settings:
3.7.3 Digital inputs
The digital inputs 1 and 3 (IN1 and IN3) are used for triggering the LMS400, for example
using external switches or sensors. To bridge bounce times on external switches, you can
configure an input delay for the inputs. For both inputs you can also select whether they are
to be active high or active low.
Note Depending on whether the measurement is triggered time or track controlled (see 3.7.2
“Common settings” on page 19), you must enter the debounce for the inputs in ms or mm.
How to configure the settings for the digital inputs 1 and 3:
Note You must add the input delay to the start delay for the triggering (see 3.7.4 “Gate” on
page 20).
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page DIGITAL
INPUTS/TRIGGER.
In the COMMON SETTINGS area select whether the measurement is to be triggered time or
track controlled.
You will find the pin assignment for the inputs in the LMS400 operating instructions in the
chapter “Electrical installation”.
Open in the PROJECT TREE, LMS400-XX00, PARAMETER the device page DIGITAL
INPUTS/TRIGGER.
Select under DIGITAL INPUT SETTINGS in the LOGIC selection field, whether the related input
is to be ACTIVE HIGH or ACTIVE LOW.
In the DIGITAL INPUT SETTINGS area in the DEBOUNCING IN1 or DEBOUNCING IN3 field enter the
path for the conveyor system in mm that is necessary to debounce the switches or
sensors connected.
Or
In the DIGITAL INPUT SETTINGS area in the DEBOUNCING IN1 or DEBOUNCING IN3 field enter the
input delay in ms that is necessary to debounce the switches or sensors connected.

20 © SICK AG · Germany · All rights reserved · Subject to change without notice 8011984/YSZ3/2016-02-04
Chapter 3Configuration 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 PROJECT TREE, LMS400-XX00, PARAMETER the device page DIGITAL
INPUTS/TRIGGER.
In the GATE SETTINGS area in the START TRIGGER SOURCE and STOP 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.
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