LRFS-0040 User Manual
Contents
1. maximum value of 9999 ms The trigger level allows you to define if measurement is to be triggered at a low high flank 0 or a high low flank 1 Your selections for trigger delay and trigger level must be separated by space 20h see gt 11 Transmission Protocol Baud Rate BR For baud rate the following settings are available 2400 4800 9600 19200 38400 Faulty inputs are automatically rounded to the nearest available baud rate The data format is fixed It includes eight data bits no parity and one stop bit Autostart AS Allows you to define a function which the LRFS 0040 is to carry out when voltage supply becomes available All inputs are possible For example if ASDT has been parametrized the LRFS 0040 will start with distance tracking immediately after power is available Distance Offset OF With the help of this parameter the user may conveniently define a zero point of his her measuring setup LDM40 Staurohr 8mm 685mm 0 0 mm Figure 4 Front edge of LRFS 0040 Zero point of the LRFS 0040 OF 0 000000e 00 coincides with the front edge of the receiving lens see gt Figure 4 Front edge of LRFS 0040 Page 15 of 20 10 Functions E Digital Switching Output Alarm The purpose of the digital switching output is to allow monitoring of targets or scenes for positive or negative excession of a user parametrizable distance threshold AC AC Distance b Distance a Figure 5 Alarm hyste2. of negative excession of Range End or an output current of more than 4 mA in the case of positive excession of Range Beginning the corresponding limit value i e 20 mA and 4 mA will be output Example 2m 10m 4mA 4mA 8 mA 12 16 20 20 mA jmA mA_ mA E Remote Triggering This function allows distance measurement to be triggered with an external signal in the form of a 5 V voltage pulse The user may configure a desired delay time and a pulse flank he she wants to use for triggering see section gt Trigger Delay TD Having done this he she must switch the LRFS 0040 to remote triggering mode Page 17 of 20 11 Transmission Protocol RB Enter 0Dh Sets displays distance m for Jout 4 mA BR Enter ODh Sets displays baud rate 1200 38400 PR__ Enter ODh Resets selected setups ___ o Z o Page 18 of 20 12 Error Messages Code Description O Z O Z S O Reflexes are too weak use target board or distance between LRFS 0040 front edge and target lt 0 1 m Too much steady light e g sun Page 19 of 20 J 13 Service Maintenance Warranty The warranty period is one year To ensure that all functions are regularly checked and your LRFS 0040 operates faultlessly over a long period of time you are advised to have the LRFS 0040 laser distance measurement module inspected at our location at annual intervals If a repair becomes necessary you should carefully pack and send
3. s performance to a particular measuring site environment and sighting task which is achieved by intelligent parametrization before measurement actually begins Your parameter setups will be preserved after the LRFS 0040 has been shut down They can only be changed by selecting a new value or initializing the standard parameter set Page 12 of 20 Range Begin RB Analog output o o lt Baud rate BR si All serial communications __ _ E Distance Tracking DW For a constant measuring rate of 10 Hz a white target board must be affixed to the target E Mean Value SA For a specified range the mean value is obtained as follows Xi X2 X3 t F Xn 20 Mean value xX _ n E Distance Value Output Format SD For output of measured distance values decimal D or hexadecimal H output mode can be selected The output mode has an influence on all commands that display a distance value Hex format lt SPACE gt xxxxxx lt CR gt lt LF gt x 0 F 1 mm resolution SF1 Negative numbers two s complement Error Exx lt CR gt lt LF gt Dist 34 56789 m SF 1 output _008 08 lt CR gt lt LF gt Dist 34 56789 m SF10 output _05464F lt CR gt lt LF gt E Time to Measure ST The time to measure is directly conditional on the measuring technique As a general rule for target surfaces with poorer reflectance the LRFS 0040 takes longer to determine the distance with a given specified accuracy W
4. switch rated for max load of 0 5 A 4 mA to 20 mA current output programmable distance range limits load resistance lt 500 Q accuracy 0 15 Temperature drift lt 50 ppm C external triggering 5 V pulse height trigger flank adjustable trigger delay adjustable laser class 2 under DIN EN 60825 1 2001 11 650 nm visible 182 mm x 96 mm x 50 mm 850 g IP 65 2 dependent on target reflectance straylight influences and atmospheric conditions 3 typical measuring accuracy under average conditions within specified measuring range you should consult the Manufacturer or your local distributor gt reflection coefficient p gt 20 for measurement of a planar white target surface that is orthogonal to the direction of sighting with defined stable environmental conditions 8 at 10 m distance the beam diameter is 6 mm at a distance of 100 m it is 6 cm 9 10 in single shot mode convertible conversion to be carried out by certified personnel Page 6 of 20 4 Working Principle The LRFS 0040 works based on comparative phase measurement To achieve this it emits visible laser beams in different frequencies The target being measured returns diffusely reflected light that is subse quently compared with a reference signal Finally a microprocessor uses the recorded phase shift to calculate a required distance with mm accuracy LDM 40 Laser beam meas beam Target Figure 1 Working principle A distanc
5. Laser Distance Measuring Systems LRFS 0040 User Manual Dear User You are advised to read this User Manual carefully before you start using the LRFS 0040 laser distance measurement module This is necessary to ensure that you will be able to utilize all the capabilities which your new acquisition provides This technology is subject to continuously ongoing development NOTE No part of this User Manual may be reproduced in any way by print photocopying microfilm or any other technique without prior written approval nor may it be processed duplicatedated or disseminated with the help of electronic systems Appropriate care was used in compiling this document No liability will be accepted in the event of damage resulting from a non compliance of the information that is contained herein Page 2 of 20 Table of Contents Se Oe Se O canacaniaianad eniecaasiba daybianspsnndstnaialeaanadeniatendiiianepedinaebansasemiutneaeacenenetapnenene 4 1 CEO S a petcaccisuatartaasequniaca sam EEE 5 IE ALG ana sicnciccnvenunstnaniesnagisianeaanesebaiddawanna vada eateneeiatameasiaueianenanmnngdnaaienennee 6 PO MIMOMIIMUICIDIC cc cscsccunvessueveavsuaussensueccnusneceaeausneuessarausneseasarsusuesnapuausssanarsesuensarecss 7 O E A E EEE E E E A E T 8 Interface Cable Wire Assignments c cccecsecseseereecessenccrseseeneueensuseeneanersesnensarensaneegss 9 MIMI Ues for Voltages cccsseccucvsccuenecscususneveceavsusuessa
6. age 11 of 20 a 9 Parameters A comprehensive set of LRFS 0040 configuration functions can be triggered at the PC This variety provides the user with a broad range of potential applications By selecting ID Enter command you may call up the menu with available setup commands LRFS 0040 s n XXXXXX V X XX DT Enter aa distance tracking DIF Enter distance tracking with external trigger DAN Enter J es distance tracking on white target DM Enter distance measurement TP Enter 008 internal temperature C SA Enter SAxx Enter display set average value 1 20 SD Enter SDd Enter display set display format d h ST Enter SAxx Enter display set measure time 0 25 SF Enter SFx x Enter display set scale factor AC Enter ACx x Enter display set ALARM center AH Enter AHx x Enter display set ALARM hysteresis RB Enter RBx x Enter display set distance of Iout 4mA RE Enter REx x Enter display set distance of Iout 20mA TD Enter TDxx x Enter display set trigger delay 0 9999ms trigger level 0 1 BR Enter BRxxxx Enter display set baud rate 2400 38400 AS Enter ASdd Enter display set autostart command OF Enter OFx x Enter display set distance offset LO Enter 0 0008 laser on EE ERECI i aR laser off PA Enter cccccscnesens display settings PR Enter iasan reset settings This allows you to optimally match the measuring module
7. e Range End RE measure measure 0 01 yard 147 162 SF1 0936 0 01 feet 441 493 SF3 28084 52 979 100 inches _ SF0 3937 Alarm Center AC Alarm Center corresponds to the distance threshold of the switching output Alarm Center is input in meters On negative or positive excession of the preset switching threshold the alarm output will switch from High to Low or vice versa depending on the alarm hysteresis setting High corresponds to about VCC 1 V Low to O V Alarm Hysteresis AH Alarm Hysteresis defines the response hysteresis of the switching output Alarm Hysteresis settings are made in units of a meter The value of a hysteresis setting corresponds to the delay in switching in m its mathematical sign describes the logic level Page 14 of 20 Range Beginning RB Range Beginning corresponds to the lower range limit of the analog output Range Beginning settings are made in units of a meter Range Beginning corresponds to a current of 4 mA Range End RE Range End corresponds to the upper distance limit of the analog output Range End settings are made in units of a meter Range End corresponds to a current of 20 mA Trigger Delay TD Trigger Delay consists of two subparameters the actual delay i e the waiting time and the trigger level Delay corresponds to the time from the point when a trigger signal is received to the moment at which a measured value is output It may take on a
8. e measurement can be triggered in different ways manually at the PC with terminal program automatically after parametrization of autostart command continuously by selecting distance tracking mode remotely controlled with external triggering For a description of these trigger options refer to gt sections 9 Parameters and gt 10 Functions of this Manual Page 7 of 20 5 Setup The laser distance measurement module is shipped together with an interface cable about 2 m in length and a User Manual in a padded cardboard box which can also be used for safe transportation of the LRFS 0040 Figure 2 Technical drawing Casing Gland seal for feedthrough of interface cable in back cover Transmitter optics m Holes for mechanical attachment four Interface cable The casing consists of a robust non corroding continuously cast aluminum part with front and back cover also non corroding The baseplate contains four holes for mechanical attachment of the LRFS 0040 gt Figure 2 Technical drawing To protect the optical components from dust physical contact mechanical impacts etc a choke is fixed to the casing Depending on the customer s request the LRFS 0040 may be shipped with a choke of any greater length or with no choke at all In the event of unqualified choke removal measurement can no more be warranted to function correctly The back cover contains a feedthrough port for the in
9. ion of distance is signalled with adjustable distance barrier at switching output Measured values are displayed in meters decimeters centimeters feet inches etc due to free scaling Option for remote triggering of measurement from external trigger device 3M Typ 3270 3290 5290 Page 4 of 20 2 Safety Instructions These safety and operating instructions should be carefully read and followed during operation and handling of the LRFS 0040 There is danger from laser radiation or electrical shock For repair work the LRFS 0040 may not be opened by anyone other than Manufacturer personnel or expressly authorized and duly instructed persons Please note that dangerous high voltage and laser radiation is present in the inner product space Compliance with the prescribed operating conditions is necessary Failure to observe advice or information contained herein or non conforming usage of the LMC J 0040 may cause physical injury to operating personnel or material damage to the measuring module To operate the LRFS 0040 use only 10 V to 30 V direct voltage supply in all cases Important operating advice To be able to fully utilize the system s capabilities you should strictly follow these rules Do not operate the module if there is fogging or contamination on optical parts Do not touch the module s optical parts with bare hands Use caution when removing dust or soiling from optical components Prevent expos
10. ith poor reflectance and too small a time to measure an error message E15 may be output among other possibilities You should increase the setting for time to measure in this case The range of available time to measure values is 0 to 25 Please note the greater the selected value the greater will be time to measure and the smaller the measuring frequency 14 see gt section 12 Error Messages Page 13 of 20 An exception is 0 value If set to 0 the LRFS 0040 automatically determines the minimal time to measure The LRFS 0040 comes with measuring time set to zero ST 0 In addition the user may configure a desired measuring frequency via the time to measure for example in order to limit the amount of data or for synchronization purposes The time to measure can approximately calculated using this equation Time to measure ST 240 ms except ST 0 Example The distance to be determined is 25 m The target s reflectance is not ideal If ST 2 is selected for time to measure E15 will be output You should choose a greater time to measure value in this case Scale Factor SF The scale factor multiplies a calculated distance value with a user selectable factor to change resolution or to switch the output to a different unit of measure The scale factor setting has an influence on the output of the measured value the distance offset OF the Alarm Center AC the Alarm Hysteresis AH the Range Beginning RB and th
11. limiting values for voltages load rates and logic levels are identical with those specified for RS 232 or RS 422 operation All outputs are sustained short circuit proof Page 9 of 20 7 Limiting Values for Voltages Input voltages Terminal point protected 13 2 V short circuit proof short circuit proof Output voltages Terminal point DD ft AV Pare differentially at 2 x Alarm gt vee 2 V All outputs are sustained short circuit proof Page 10 of 20 8 Starting Up Protect all cable ends against short circuit effects before you turn voltage supply on Necessary cable connections must be established in accordance with table specifications on the previous page You require a PC with corresponding data interface port and a terminal program to perform Start up of the LRFS 0040 For starting up the LRFS 0040 needs to be installed at the measuring site aligned until pointing to a desired target and kept stable in this position The target should preferentially have a homogeneous white surface AN Caution Do not use any retroreflectors Alignment of the LRFS 0040 is facilitated by a laser beam that is visible and can easily be turned on at the PC Operating voltage supply must be connected to the corresponding ends of the interface cable A pole reversal protection is integrated to prevent the destruction of electronic components 13 depending on ambient light and target conditions P
12. resis Figure 6 Alarm hysteresis positive negative Configuration is performed by choosing appropriate settings for Alarm Hysteresis and Alarm Center see gt sections 9 Parameter The logic state of the switching output essentially depends on the mathematical sign of your hysteresis setting If the setting for hysteresis is positive the output will switch to high on positive excession of the switching threshold hysteresis 2 and to low on negative excession of the switching threshold hysteresis 2 If the setting for hysteresis is negative the output will switch to low on positive excession of the switching threshold hysteresis 2 and to high on negative excession of the switching threshold hysteresis 2 Example m 0 2m m im L low H high with distance increasing from left to right Page 16 of 20 E Analog Output The analog output allows a standardized long distance transmission of analog distance data with the help of a two wire cable The level of current which is output to this cable is proportional to the measured distance value within a distance interval that is defined by Range Beginning and Range End see gt sections 9 Parameter The output current value in mA can be calculated according to this equation jour ama 16 Distance Value Range Peeing fake Range End Range Beginning Where these calculation rules would result in an output current less than 20 mA in the case
13. terface cable 2 m in length as required by IP 65 standards Where local conditions necessitate a greater distance between the actual measuring location and the PC voltage supply an extended interface cable can be provided You should however consult us in any case before you start working under modified operating conditions 1l please get in touch with your contact person 12 may deviate from interfacing specifications Page 8 of 20 6 Interface Cable Wire Assignments AN Caution The cable ends are uncovered It s the user s responsibility to prevent shorts Interface cable wiring assignments are as follows Alarm TxD RX RxD RX GND TRIG VCC GND IOUT TX TX Schirm Figure 3 Interface cable color codes No Color code Designation Function ifRS232 Function if RS422 ALARM Digital switching output Digital switching output 2 green RS 232 send data RS 422 receive data RX RS 232 receive data RS 422 receive data RX Ground potential Ground potential 6 pink ___ VCC Supply voltage Supply voltage 8 red IOUT Current output Current output _ _ 9 black TX RS 422 Send data 10 violet TXt RS 422 send data The GND wires are internally combined to serve as reference potential for all voltage values specified below If data transfers are accomplished via RS 232 we recommend using cable 4 gray GND as signal ground and cable 7 blue GND as supply ground The
14. the LRFS 0040 to our address Page 20 of 20
15. ure to shock impacts during transportation and operation Prevent overheating of the module Do not expose the module to direct sun radiation while it is stored in a motor vehicle The LRFS 0040 is splashproof and dustproof as required under IP 65 internal protection standards The LRFS 0040 laser distance measurement module is a class 2 laser product under DIN EN 60825 1 2001 11 Warning There is class 2 laser radiation when the cover is removed Do not look into the beam Page 5 of 20 E 3 Performance Data Measuring range Measuring accuracy Meas value resolution Measuring rate Laser divergence Operating temperature Storage temperature Supply voltage Power consumption Data interface Digital switching output Analog output Trigger input Eye safety class Wavelength Dimensions L x W x H Weight Internal protection class 0 2 m to 50 m with natural surfaces more than 100 m achievable depending on target reflectance 3mm 2 mm under defined measuring conditions in a distance range from 0 2 to 30m 0 1 mm user scalable typically 5 Hz up to 10 Hz possible 0 6 mrad 10 C to 50 C 20 C to 70 C 10 V to 30 V direct voltage depending on operating mode lt 0 4 W for standby lt 1 W for distance tracking RS 232 RS 422 baud rate 2400 to 38400 format 8N1 fixed programmable switching threshold and hysteresis high side
16. vcenuseeusararausuaseanarsusuensusegs 10 SEET OR 11 Poio ie oi 55 ceca cca aaa au sniensia asd daibais vain onmamenna ne aided aeesae atmenE TA anemia aad badaU ta eORaeaONeEN 12 I a 5 5 cscatcinadaweanduaceahawadannaesuidetvieen ties suenstananed ceaeaannaaanueseaiegeeemeasteseiaeennaew 16 DF FOCOC o P E E 18 aor oles 19 Service Maintenance Warranty sssssssssssssrnnrrnssnnnrnnnrnnnnnnnnnnrnnnrnnnrnnrnnurnnnrrnnrnnnnne 20 Page 3 of 20 1 General The LRFS 0040 laser distance measurement module is designed for mobile and stationary distance measurement Particular features are Operation under extreme outdoor temperatures with high accuracy and great reach Great range of operating voltages 10 V to 30 V from on board vehicle supply a direct voltage industrial supply net or a DC power pack Small stable power consumption lt 1 5 W without Iaiarm Up to 30 m reach for distance measurement and more than 100 m reach with additional reflectors mounted onto target depending on reflectance and environmental conditions Simple sighting with visible laser beam Flexible extendible interface cable for voltage supply bidirectional data interface switching output and analog output Input of commands for available measuring functions and output of measured readings via PC or laptop Switching output and analog output are separately programmed and with different parameters Positive and negative excess
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