Handbuch LDM 41-42-englisch 040923.indd
Contents
1. en Anschluss der Kabel 3 7 Interface Kabel I Achtung Die Kabelenden liegen frei Der Anwender hat daf r Sorge zu tragen dass Kurzschl sse vermieden werden Die Beschaltung des Interface Kabels befindet sich in Tabelle 2 Das Interface Kabel ist in den L ngen 2 m 5 m und 10 m lieferbar Kundenspezifische Kabell ngen sind optional lieferbar Finger GmbH amp Co KG Schamerloh 84 e 31606 Warmsen Internet www finger kg de email info finger kg de Technische Daten 3 7 Interface Cable Caution i i Both cable ends are exposed The user is responsible to take precautions that will prevent any kind of shorts For interface cable wire assignments refer to Table 2 The interface cable can be provided in 2 m and 5 m length version Cus tomized cable lengths are optionally available by previous agreement with Jthe manufacturer Bild 4 Interface Cable Interface cable extension is possible One should however observe some important rules depending on the particular application scenario LDM41 RxD and TxD data lines should be kept as short as possible in all cases because they tend to have an interference emitting and interference receiving effect notably when in open state Especially in environments with strong spurious radiation there may be faults that may in some cases require a reset turning the LDM41 off and on again In cases where no RS232 interface communication is re quired after parameter2. IEC825 1 EN60825 class II FDA21 CFR lt 1mW 0 6 mrad lt 6 mm at 10 m distance lt 30 mm at 50 m distance lt 60 mm at 100 m distance 3 2 Measuring Performance Measuring range Measuring accuracy Measured value resolution Time to measure Max target motion speed Max acceleration 0 2 m to 50 m with natural surfaces for DT DF or DM and ST 0 more than 100 m if target reflectance high enough 3 mm 15 C 35 C 2 mm for distance range from 0 1 m to 30 m under defined measuring condi tions Max 5 mm across full temp range and for any type of surfaces Depends on scale factor 1 mm with SF 1 Typ 160 ms 6s in standard mode measuring any type of surface 100 ms in DW measuring mode 20 ms in DX measuring mode only LDM42 5 m s in DX measuring mode only LDM42 2 5 m s in DX measuring mode only LDM42 1 conditional on target reflectance ambient light influences and atmospheric conditions 3 3 Interface Type of connec tion Supply voltage UL Max power con sumption in no load state Data interface Please specify on ordering sheet Digital switching output Analog output Trigger input 12 pole M18 flange mount connector Binder series 723 DC 10 V 30 V lt 1 5W RS232 LDM41 1 LDM42 1 or RS422 LDM41 2 LDM42 2 Baud rate 9 6 kBaud 2 4 4 8 19 2 38 4 kBaud selectable Data bits 8 Par
3. IOUT mA 20 mA 16 IOUT mA 20 RE lt RB RE gt RB 4 d1 d2 Distanz Figure 20 Output current diagram for RE gt RB and RE lt RB To match analog output behavior in the event of an error message E15 E16 E17 E18 appropriate settings can be made under SE 1 4 2 11 5 5 Trigger Input Figure 21 Wiring diagram of trigger input The trigger input is intended for triggering a distance measurement with an external signal that is applied as a voltage pulse between 3 V and 24 V 34 6 Error Messages It is for the user to specify a desired delay time and a pulse flank to be selec ted for synchronization see 4 2 16 Having done this he she must switch the LDM41 42 to trigger mode DF Code Description E15 E16 E17 E18 E23 E24 E31 E51 E52 E53 E54 E55 E61 E62 E63 E64 Reflexes are too weak use target board or distance from LDM front edge to target is less than 0 1 m Reflexes are too strong use target board Too much steady light e g sun DX mode only LDM42 reflexes too weak use target board or distance from LDM front edge to target is less than 0 1 m Temperature below 10 C Temperature above 60 C EEPROM checksum Failed to set avalanche voltage Excessively high laser current laser defect Division by O PLL range Unknown error Faulty command Illegal parameter invalid command SIO parity error SIO framing error 35 36 7 Service Maintena
4. SF 22222 1 error mode SE 000000ee eee 1 ALARM center AC 222222 1000 ALARM hysterese AH 22222 0 1 distance of Iout 4mA RB 1000 distance of Iout 20mA RE 2000 trigger delay trigger level TD 0 0 baud rate BR 000ce cece eee 9600 autostart command AS ID distance offset oOF 0 Figure 8 Standard settings 25 Communications Protocol 4 3 Example Establishing Communication with Hyperterminal Hyperterminal is a terminal program that is typically included in Win32 opera ting system delivery To start Hyperterminal use the starting menu in this order Start gt Programs Accessories gt Communication gt Hyperterminal Initially a dialog box appears for defining a randomly selectable name of a communication session you want to begin Connection Description Figure 7 Establishing communication with the hyperterminal name of communication session A second dialog box allows you to select the serial COM port to which the LDM41 42 is connected Connect To Figure 8 Establishing communication with the hyperterminal COM port selection 26 Communications Protocol A third dialog box is then displayed with various parameter setting options for this communication session At this point in the process the baud rate bits per second and the flow control must be correctly initialized Port Settings Bits per
5. SI EANEEHEF display set measure time 0 25 TER display set scale factor ehe display set error mode 0 1 2 are display set ALARM center BEN display set ALARM hysterese display set distance of lout 4mA eet display set distance of lout 20mA a display set trigger delay 0 9999ms trigger level 0 1 ENDER display set baud rate 2400 33100 18 AS display set autostart command DT DVV DX DF DM TP LO 190F display set distance offset 0SO set current distance to offset offset distance WMNAUKRWN J lt ws g Nn mm bs isis IS LY LY AMU RW vu AUmwT 3PA sind display settings APR reset settings Example Establishing Communication with Hyperterminal AABARARAARARAAAARRAAAAR AR ARR e w Ww Ww U Ww w W WN NN N N N N H WNNNNNNNNNNNNNNNNNNNNNNNNNO n N gt O LO O O 0 0ON NNN NOU WMBWN Operating Modes RS232 RS422 Digital Switching Output Analog Output Trigger Input Error Messages Service Maintenance Warranty 1 General The LDM41 42 is a laser range finder to measure distances from 0 1 M to more than 100 m with pinpoint accuracy A given target can be clearly identified with the help of a red laser sighting point In terms of operating reach the LDM41 42 performs depending on the reflectance morphology and qualities of the target to be measured The range finder works based on comparative phase measurement It emits modulated high frequency light which is diffu
6. counterpart is a cable jack series 423 from Binder with grading ring A cable set with open ends is optionally available Figure 3 View of LDM41 42 pole assignments HADDE ISS MMA IRS I NEUES KABEL ACHTUNG NDERUNG AUF INTERNATIONALEN FARBCODE Pin ee LDM4X X RS232 LDM4X X RS422 Wei TxD RS232 Sendedaten RX RS422 Empfangsdaten Braun RxD RS232 Empfangs RS422 daten Empfangsdaten Gr n TRIG externer TRIG Triggereingang Triggereingang Gelb IOUT Analogausgang IOUT Analogausgang Grau n c TX RS422 amp ber i E Sendedaten F Orange n c TX RS422 Sendedaten spannun spannung H Rot ALARM Digitaler ALARM Digitaler Schaltausgang Schaltausgang J Schwarz GND Signalmasse GND IL Wei Braun GND Versorgungsmasse Versorgungsmasse 4 abelle 2 Anschlussbelegung Die Leitungen GND sind intern zusammengef hrt und sind Bezugspotential f r alle nachfolgend angegebenen Spannungswerte Beschalten von Ausg ngen mit Eingangssignalen kann das LDM J 0040 1 2 besch digen Erfolgt die Daten bertragung ber RS232 wird empfohlen Kabel Schwarz GND als Signalmasse und Kabel Grau Pink GND als Versorgungsmasse zu nutzen Grenzwerte der Spannungen Belastungen und logischer Pegel entsprechen den Normen RS232 bzw RS422 Alle Ausg nge sind dauerkurzschlussfest ausgelegt Bitte achten Sie sorgf ltig auf den sachgem
7. second s Data bits jf O H 2 H Stebi 1 4 Elow conto TEE Bestore Defaults ma Figure 9 Establishing communication with the hyperterminal communication parameter settings Once the third dialog box has been confirmed the terminal window opens Its status bar in the lower left corner should display Connected With the LDM41 42 powered and operational commands can now be input for example ID Note A currently entered command will only be displayed if Local echo is enabled This function can be accessed via File menu File gt Properties gt Settings tag gt ASCII Setup 27 Communications Protocol LDM4x HyperT erminal Figure 10 Establishing communication with the hyperterminal ID input Once this command has been triggered by pressing the Enter key the LDM41 42 bius display its online help in response SF Enter SFx xl Enter display set scale factor SE Enter SEx Enter dtaplay est error mode 0 172 lout const ALARM con 1 lout 4mA REDRB Dom RECRB ALARM OFF AH gt O 0 2 lout 20mA REDRB 4mA RE lt RB ALARM ONBAH gt O OF note eal pox E display set ALARM center sener StxxlEnter display set measure time 0 25 NDAHCO AHlEnter AHx x Enter display set ALARM hysterese RBLEnter RBx x Enter display set distance of lout 4mA RElEnter REx x Enter display set distance of lout 20mA ro nter TOxx x Enter dis
8. typically includes no RS422 communication port you require an RS422 interface card or an RS422 to RS232 converter for commu nication 5 3 Digital Switching Output white 10 500mA Figure 17 Wiring diagram of digital switching output With the help of a user selectable distance threshold the switching output can be set to monitor objects or conditions for positive or negative excession Configuration settings to this end can be made in Alarm Center AC and Alarm Hysteresis AH see 4 2 12 and 4 2 13 Of decisive significance for the switching output logic state is the mathe matical sign of the hysteresis condition It can be used as a quasi inverter of the switching output In the case of positive hysteresis the output changes from LOW to HIGH condition with increasing distance if AC AH 2 was positively exceeded and from HIGH to LOW with decreasing distances if AC AH 2 was negatively exceeded In the case of negative hysteresis the output changes from HIGH to LOW with increasing distance if AC AH 2 was positively exceeded and from 32 Operating Modes LOW to HIGH with decreasing distance if AC AH 2 was negatively excee ded HIGH lt gt gt I 1 1 1 AH AH 1 I LOW T r AC AC Distanz Figure 18 Digital switching output behavior with positive and negative hysteresis Example For the given sample situation it is assumed that a moving object needs to be monitore
9. Dimensional drawing 1 Equalizer tube at front cover 2 Casing 3 Protective cap for flange mount connector 4 Receiver optics 5 Sender optics 6 Mechanical mounting holes four 7 12 pole M18 flange mount connector Binder series 723 Figure 1 Dimensional drawing To protect the range finder s optical surfaces from dust physical contact mechanical impacts etc the casing has a special equalizer tube attached to it This tube can be extended or removed as necessary to meet the customer s operating needs Please note that measurement cannot be guaranteed to function correctly if the equalizer tube is removed by unqualified action 4 consult your local distributor on this issue 12 Technical Data Figure 2 Offset against zero edge The LDM41 42 s zero point is located 7 mm behind the outer surface of the front cover or 137 mm before the back cover outside face respectively This zero point has been introduced for constructional design reasons It can be compensated with the help of parameter OF see section 4 2 19 OF display set distance offset 3 6 Electrical Mounting Conditions Located on the back cover is a connector terminal A 12 pole round type flange mount series 723 connector from Binder has been selected for this purpose It is sealed against the casing to comply with IP 65 requirements This connector type guarantees optimized screening and a high IP degree The required
10. by running an initialization routine The following is a short overview of the communications protocol Command Description DT Starts distance tracking DW Starts distance tracking on white target at 10 Hz DX Starts distance tracking on white target at 50 Hz only LDM42 DF Starts remote triggered single distance measurement single shot DM Starts single distance measurement single shot TP Queries inner temperature SA Queries sets floating average value 1 20 SD Queries sets output format dec hex ST Queries sets time to measure 0 25 SF Queries sets scale factor SE Queries sets error mode 0 1 2 AC Queries sets alarm center AH Queries sets alarm hysteresis RB Queries sets beginning of range 4 mA RE Queries sets end of range 20 mA TD Queries sets trigger delay BR Queries sets baud rate AS Queries sets autostart OF Queries sets offset so Sets current distance as offset LO Turns laser on LF Turns laser off PA Displays all parameter values PR Resets all parameters to standard values Table 3 Short overview of communications protocol 4 1 Online Help Once communication has been established with a PC as described above an online help tool can be called up by triggering an ID Enter or id Enter command at the keypad Its purpose is to support work with distance measu rement and parameter
11. cial safety precau tions one should refrain from directly looking into the laser beam Do not direct the laser beam onto persons Caution There is class 2 laser radiation Do not look into the beam 2 5 Electric Supply Use only 10 V to 30 V direct voltage for LDM41 42 operation Use only the specially designated connector terminal for voltage supply Specified signal levels must not be exceeded in order to guarantee correct data communication 2 6 Important Operating Advice To make full use of the system s inherent performance capabilities and achie ve a long service life you should always follow these operating rules Do not turn the module on if there is fogging or soiling on its optical parts Do not touch any of the module s optical parts with bare hands Proceed with care when removing dust or contamination from opti cal surfaces Prevent exposure to shock impacts during transportation of the LDM41 42 Prevent overheating of the LDM41 42 Prevent major temperature variances during LDM41 42 operation In accordance with IP65 internal protection standards the LDM41 42 is designed to be splashproof and dustproof Read these safety and operating instructions with due care and follow them in practical use 2 Technical Data 3 1 Laser Laser Laser class Output power Laser divergence Beam diameter 650 nm laser diode red light 650 nm visible laser class 2 conforming to standard
12. d The output is to switch at a distance of 10 m AC10 with 20 cm hysteresis AHO 2 and AH 0 2 respectively Increasing distance gt Decreasing distance gt AH 98m 99m 10 0m 10 1m 10 2m 10 1m 10 0m 99m 98m AH L L L H H H H H L AH H H H L L L L L H L LOW H HIGH How the switching output is to behave on occurrence of an error message 5 E16 a 7 E18 can be defined by making suitable settings under SE see 4 2 11 5 4 Analog Output Figure Wiring diagram of analog output The analog output is designed to allow normalized analog distance data transmission over greater length via a two wire cable The current which is injected into the cable is proportional to the measured target distance This applies within a distance interval that is marked by the 33 Operating Modes two limiting parameters Range Begin RB and Range End RE see 4 2 14 und 4 2 15 where RE may be greater or smaller than RB The output current value is calculated according to this equation Distanz RB RE RB Distanz RE RB RF If RB is negatively exceeded in RE gt RB direction or positively exceeded in ig lt RB direction by the actual distance value the analog output current will e4mA If RE is positively exceeded in RE gt RB direction or negatively exceeded in RE lt RB direction by the actual distance value the analog output current will be 20 mA RE gt RB IOUT mA 4 mA 16 RE lt RB
13. e data lines 2 3 Nonconforming Use Do not operate the LDM41 42 in any other way than described under Intended amp Conforming Use above and only in a proper working condition Safety devices must not be defeated or otherwise rendered ineffective Information and warning signs must not be removed Repair work on the LDM41 42 must not be carried out by anyone other than the manufacturer Refrain from using the LDM41 42 in an explosive environment Measurement with the LDM41 42 pointed at the sun or other strong lightsources may produce faulty results Measurement of targets with poor surface reflectance in a strongly reflecting environment may also result in faulty measurement values Measurement of strongly reflecting surfaces may deliver faulty results Measurement performed through transparent optical media for example glass optical filters plexiglass etc may equally produce incorrect results Rapidly changing measuring conditions are likely to falsify the result of measurement 2 4 Laser Classification The LDM41 42 is a class 2 laser product as stipulated in IEC825 1 DIN EN 60825 1 2001 11 and a class Il product under FDA21 CFR In the event of accidental short time laser exposure the human eye is sufficiently protected by its own optico facial winking reflex This natural reflex may be impaired by medication alcohol and drugs Although the product can be operated without taking spe
14. finger ik LDM41 42 User Manual Dear User You are advised to carefully read this User Manual before powering on the LDM41 42 laser distance measuring module for the first time This is necessary to ensure that you will be able to utilize all the capabilities and features which your new acquisition provides This technology is subject to continuously ongoing development Editorial deadline July 2004 Document number 012840 002 98 02 0704 en Finger GmbH amp Co KG Sapelloh 84 D 31606 Warmsen Tel 49 5767 96020 Fax 49 5767 93004 E Mail info finger kg de Revision state Date Revision Explanation July 2004 000 Compiled Content General Safety Instructions Basic Notes Intent amp Conforming Use Nonconforming Use Laser Classification Electrical Supply Important Operating Advice Technical Data Laser Measuring Performance Interface Environment amp Ambient Conditions Mecanical Mounting Conditions Electrical Mounting Conditions Interface Cable Communications Protocol Online Help Commands and Their Funktion DT parrer distancetracking DW distancetracking with cooperative target 10Hz DX distancetracking with cooperative target 50Hz OUIAWN AOMUIRWN DF distance measurement with external trigger Kekse distance measurement Rassen internal temperature C SA display set average value 1 20 Der display set display format d h
15. ill cease to deliver varying distance readings At a distance of RE a current of 20 mA will be output RE must be selected so it is properly matched to the currently valid scale factor SF value RE can be greater or smaller than RB see 5 4 Analog output 23 4 2 16 TD display set trigger delay 0 9999ms trigger level 0 1 Standard setting 0 0 TD is solely intended for behavioral configuration of the remote trigger input DF mode see 4 2 4 TD consists of two subparameters of the actual delay value i e the delay time and the trigger level trigger delay corresponds to the time from arrival of the trigger signal to the starting point of a measurement It may be set to any value between 0 and 9999 ms With the help of the trigger level one may define if measure ment is to begin on a rising or a falling pulse edge Trigger delay and trigger level must be separated by space 20h in the entry line Example TD1000_ O Enter In the given example the delay has been set to 1000 ms and the trigger flank to rising LOW to HIGH transition 4 2 17 BR display set baud rate 2400 38400 Standard setting 9600 Available baud rate settings are 2400 4800 9600 19200 38400 Faulty entries will be rounded to the nearest baud rate A fixed data format of eight data bits with no partiy and one stop bit is used 4 2 18 AS display set autostart command DT DW DX DF DM TP LO Standard se
16. istance to offset offset distance LO Enter 2 3 cia ieee laser on LF Enter cccc eens laser off PA LEnter c0ceeeeeeee display settings PR Enter 0cceeaceeeee reset settings Bild 7 Start protocol of connection establishment gt only available for LDM42 18 4 2 Commands and Their Functions Command entries are not case sensitive This means that small and capital lettering can be used for commands Any command which is to be sent to the LDM must be terminated by a hexa decimal ODh carriage return character Orn decimal digits are to be entered they must be separated by period 2Eh For command paramater entries one must distinguish between parameter settings and parameter queries Querying is achieved with a command in simple format e g for alarm center parameters AC Enter For parameter setting a new value must be added after the command with no delimitation sign in between for example AC20 8 Enter In the given example the alarm center will be set to 20 8 4 2 1 DT distancetracking Input parameter SA SD SE SF ST OF Output RS232 RS422 digital switching output analog output DT mode can be chosen for distance measurement of different kinds of surfaces varying reflectance In this type of distance tracking mode the LDM41 42 uses internal algorithms to continuously evaluate the quality of the laser radiation signal that is coming back This may cause longer measu
17. ity none Stop bit 1 Handshake nonen Protocol ASCII HIGH U 2 V LOW lt 2 V rated for loads up to 0 5 A switching threshold and hysteresis selectable can be inverted 4 mA 20 mA distance range limits can be set beha vior on error report can be preselected Load resistance lt 500 W against GND Accuracy 0 15 Max temperature drift 50 ppm K Trigger voltage 3V 24V Trigger threshold 1 5 V Trigger flank to start of measurement preset at 5 ms delay time Trigger pulse length gt 1 ms Delay time trigger selectable from 0 ms to delay 9999 ms Trigger flank selectable Max input U 30V protected against polarity reversal voltages RxD 25 V RX RX 14V TRIG 25 V Output voltages TxD 5V TX 2 V 2 x 50 W load differential ALARM U 2 3 4 Environment amp Ambient Conditions Operating temperature 10 C bis 60 C Storage temperature 20 C bis 70 C Protection type IP65 Technische Daten 3 5 Mechanical Mounting Conditions Casing Extruded aluminum profile with powder coat paint finish front side amp rear side cover and tube anodized Dimensions Lx W x H 182 mm x 96 mm x 50 mm Weight 850 g The casing consists of a rugged corrosion resistant extruded aluminum profi le with front side and rear side covers also in corrosion resistant design Four mounting holes are provided in the baseplate for mechanical attachment of the LDM41 42 gt Figure 1
18. ization you should provide for a termination wiring as shown in Figure 5 geen TxD gt gt yellow lt lt RxD grey GND 3kQ 2 2 nF Figure 5 Recommended termination wiring for work with open RS232 Technical Data LDM42 Extension and termination according to standard requirements For correct screening three essential rules must be followed 1 Use screened cable e g 10XAWG224CULSW remember to extend also the cable screen 2 Connect screen to reference potential of UV on cable end 3 For integration with vehicles where attachment point and reference potential GND or have equal potentials it may be necessary to electrically isolate the LDM41 42 casing In order to prevent ground loops GNC Figure 6 Correct screening of LDM41 42 4 Communications Protocol The easiest way to trigger and parameterize the LDM41 42 is by using a PC with RS232 communication port see 5 1 RS232 and a terminal program see 4 3 Example Establishing Communication with Hyperterminal The commu nications protocol is available in ASCII format Before an operating session begins desired parameter settings can be made in a smart selection procedure until the measuring module is optimally adap ted to the particular measuring site conditions and the measuring job All valid settings will be preserved on turning the LDM41 42 off They can only be replaced with new value entries or changed back to their standard values
19. ization commands Enter corresponds to hexadecimal ODh carriage return DT Enter cccce eee eee distancetracking DW Enter ccc eee eee distancetracking with cooperative target 10Hz DX Enter cccee eee distancetracking with cooperative target 50Hz DF Enter ccceeeeeaee distance measurement with external trigger DM Enter 222222200 distance measurement TP Enter z2222nnnnn 0 internal temperature C SA lEnter SAxx Enter display set average value 1 20 sD Enter SDxx Enter display set display format d h ST Enter STxx Enter display set measure time 0 25 SF Enter SFx x Enter display set scale factor SE Enter SEx Enter display set error mode 0 1 2 0 Iout const ALARM const 1 Iout 4mA RE gt RB 20mA RE lt RB ALARM OFF AH gt 0 ON AH lt O 2 Iout 20mA RE gt RB 4mA RE lt RB ALARM ON AH gt O OFF AH lt O AC Enter Acx x Enter display set ALARM center AH Enter AHx x Enter display set ALARM hysterese 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 DT DW DX DF DM TP LO OF Enter OFx x Enter display set distance offset SO FEHtEr Ta 444 Be set current d
20. minal are required As part of preparative actions the LDM41 42 must be properly installed in the designated working site oriented onto the target and kept in a stable position The target to be measured should preferentially have a homogene ous white surface Caution Do not use any retroreflectors Alignment is facilitated by the visible laser beam of the LDM41 42 It can easily be turned on at the PC 5 1 RS232 Initially RS232 communication interfaces purely functioned as PC communi cation ports They have become the established standard tool for serial data transmission over short cable lengths With greater transmission lengths the interface is highly susceptible to interferences notably in the vicinity of strong electromagnetic noise emitters Therefore it should only be used for LDM41 42 configuration Figure 14 Diagram of RS232 wiring at 9 position D Sub cable jack Shield Figure 15 Diagram of RS232 wiring at 25 pole D Sub cable jack 8 depending on ambient light and target to be measured 31 Operating Modes 5 2 RS422 For configuration purposes and permanent data transmissions over a greater length the RS422 can be used This type of interface is insusceptible to inter ference and noise influences and qualities for industrial use Where twisted cable pairs are involved transmissions lengths up to 1200 m can be handled lt lt RX Figure 16 RS422 wiring diagram Since a standard PC
21. nce Warranty In relations with our Customers and Distributors we grant a two year war ranty period for this product In the event of necessary repair work before or after these scheduled dates you should carefully pack your LDM and send it back to your sales agent or the address below stating all relevant operating conditions applications connectivity data environmental conditions Finger GmbH amp Co KG Sapelloh 84 D 31606 Warmsen You may also contact us via phone or by fax before dispatching the LDM We can be reached at Tel 49 5767 96020 Fax 49 5767 93004 E Mail info finger kg de Internet www finger kg de 37 38
22. play set trigger delay 0 9999ms trigger level display set baud rate 2400 38400 display set autostart command fp1 ON 0F OWTP LO display set distance offset set current distance to offset offset distance laser on laser off display settings reset settings Figure 11 Establishing communication with the hyperterminal LDM41 42 response 28 Communications Protocol Before terminating a hyperterminal session the software queries if you really want communication abandoned This query must be acknowledged HyperT erminal x You are curently connected Are you cure you want to disconnect now _ Figure 12 Establishing communication with the hyperterminal disconnect query box Finally unless performed earlier the current hyperterminal configuration can be saved for more convenience i e you don t have to reconfigure the interface for each new hyperterminal session HyperTerminal x Q Do you want to save session LOM 4x No Cancel Figure 13 Establishing communication with the hyperterminal saving a communication session 29 30 5 Operating Modes Make sure that all cable ends are protected against short circuit effects before you turn power supply on Connect cable terminals as required for the particular operating mode To prevent short circuits you should seal unused cable ends For starting up a PC with RS232 or RS422 data interface and a terminal program such as the hyperter
23. positive and negative excession of preselectable distance range window by sighting distance Measured values can be displayed in meters decimeters centimeters feet inches due to ra for remote triggering of a measurement from an external trigger evice The LDM41 42 measuring module is shipped in a rugged cardboard box with adequate padding for safe transportation 2 Safety Instructions 2 1 Basic Notes These safety and operating instructions should be carefully read and followed during practical work with the LDM41 42 There is danger of laser radiation or electrical shock For necessary UN repair work the LDM41 42 may not be opened by anyone other than Manufacturer personnel Unauthorized intervention into the inner product space will void any warranty claims Compliance with all specified operating conditions is necessary Failure to observe advisory notes or information contained in this Manual or nonconforming product usage may cause physical injury to the user or mate rial damage to the LDM41 42 Cable connectors must not be plugged or unplugged as long as voltage Is supplied Remember to turn voltage supply off before you begin working on cable connections 2 2 Intended amp Conforming Use Measurement of distances Special measuring functions Compliance with prescribed temperatures for operation and storage Operation at correct voltage level Application of specified signal levels to the appropriat
24. resolution or outputs in a different unit of measure The scale factor may also be negative Scale factor Resolution Output Unit of measure SF1 1 mm 12 345 m SF10 0 1 mm 123 45 dm SF1 0936 0 01 yard 13 500 yard SF3 28084 0 01 feet 40 501 feet SF0 3937 1 inch 4 860 100 inch SF 1 1 mm 12 345 m Table 4 Examples of scale factor Note Following a change in the scale factor the settings for digital and or analog output and offset must be matched accordingly 4 2 11 SE display set error mode 0 1 2 Standard setting 1 SE allows you to configure how the digital switching output alarm and or the E output is to behave on occurrence of an error message E15 E16 E17 E18 Depending on the particular LDM41 42 application different reactions to an error message are possible Available selection options are 0 1 and 2 with the following effects in the event of an error message SE Digital switching output alarm Analog output 4 20 mA 0 Preserves the state of a latest Outputs the current of a latest valid measurement valid measurement 1 Positive alarm hysteresis LOW RE gt RB current 4 mA Negative alarm hysteresis HIGH RE lt RB current 20 mA 2 Positive alarm hysteresis HIGH RE gt RB current 20 mA Negative alarm hysteresis LOW RE lt RB current 4 mA Table 5 Digital switching output and analog output for SE 0 1 and 2 22 4 2 12 AC display set ALARM center Standard
25. ring times in the case of poor reflectance or sudden jumps in distance The minimum time to measure is 160 ms the maximum time is 6 s If the measuring signal fails to reach a specified quality within six seconds an error message Is output The time to measure may also be limited by setting the ST parameter to a desired value 4 2 2 DW distancetracking with cooperative target 10Hz Input parameter SA SD SE SF OF Output RS232 RS422 digital switching output analog output DW mode performs at a steady measuring rate of 10 Hz LDM 41 only The selected object must have a white target board for measured values to be stable 4 2 3 DX distancetracking with cooperative target 50Hz Input parameter SA SD SE SF OF Output RS232 RS422 digital switching output analog output DX mode performs at a steady measuring rate of 50 Hz The selected object must have a white target board for measured values to be stable 4 2 4 DF distance measurement with external trigger Input parameter SD SE SF ST OF TD Output RS232 RS422 digital switching output analog output DF mode allows a measurement that is triggered by an external trigger pulse Initially after selecting this mode the operator does not receive any response As soon as the trigger pulse has been detected the LDM41 42 will send data and switches to digital and or analog output Settings for trigger delay delay and trigger flank can be defined via parame
26. sely reflected back from the target with a certain shift in phase to be compared with a reference signal From the amount of phase shift a required distance can then be determined with millimeter accuracy A distance measuring cycle can be triggered in three different ways By sending a command from the PC or another equivalent control unit By making appropriate prior parameter settings for the autostart command and applying supply voltage By external triggering in remote trigger mode For a more detailed description of these three trigger options you should consult section 5 Operating Modes of this User Manual PEC performance features are Provides high accuracy and great reach under extreme outdoor temperatu res Works in a wide range of operating voltages from 10 V to 30 V from an on board vehicle supply point an industrial direct voltage supply net or a DC power pack Features consistently low power consumption of lt 1 5 W without 1 Up to 30 m reach for distance measurement with potential for more than 100 m reach if additional reflectors are mounted onto the target depen ding on reflectance and environmental conditions Visible laser beam for easier sighting RS232 interface port for input of measuring functions and commands from and output of measured values to a PC or a laptop Switching output and analog output are separately programmed Switching output with adjustable limit to indicate
27. setting 1000 AC corresponds to the distance on identification of which the switching output switches AC must be defined taking into consideration the currently valid scale factor SF value As soon as the predefined distance threshold is negatively or positively ex ceeded the alarm output will switch from HIGH to LOW or vice versa with a certain delay as set under alarm hysteresis AH see 5 3 Digital Switching Output 4 2 13 AH display set ALARM hysterese Standard setting 0 1 AH sets the switching hysteresis of the switching output AH must be selected so it is properly matched to the currently valid scale factor SF As soon as the predefined distance threshold is negatively or positively exceeded the alarm output will switch from HIGH to LOW or vice versa with a certain delay as set under alarm hysteresis AH see 5 3 Digital Switching Output 4 2 14 RB display set distance of lout 4mA Standard setting 1000 RB Range Begin defines the point of a distance range at which the analog output will begin to deliver varying distance readings At a distance of RB the output current will be 4 mA RB must be selected so it is properly matched to the currently valid scale factor SF setting RB can be smaller or greater than RE see 5 4 Analog output 4 2 15 RE display set distance of lout 20mA Standard setting 2000 RE Range End defines the point of a distance range at which the analog output w
28. tay 1D see 4 2 16 TD display set trigger delay 0 9999 ms trigger level 0 1 425 DM distance measurement Input parameter SD SE SF ST OF Output RS232 RS422 digital switching output analog output DM mode triggers a single measurement single shot 42 6 TP internal temperature C TP queries the value of the inner LDM41 42 temperature Note In tracking mode the inner temperature may exceed the surrounding temperature level by as much as 10 K 4 2 7 SA display set average value 1 20 Standard setting 1 SA allows you to calculate a floating average value from 1 to 20 measured values Calculation is based on this formula Die Berechnung erfolgt Uber folgende Formel X X X X n 20 Average value x n 20 4 2 8 SD display set display format d h Standard setting d SD switches between decimal d and hexadecimal h output format of measured value data SD affects all commands that output a distance value A hexadecimal output value is calculated from a given measured distance value in mm multiplied by the scale factor SF Negative distance values are output in two s complement notation Example Distance 4 996 m SF1 dec 4 996 hex 001384 4996 mm x SF1 Distance 4 996 m SF10 dec 49 960 hex 00C328 49960 4996 mm x SF10 4 2 9 _ ST display set measure time 0 25 Standard setting 0 Measuring time is directly conditional on the selec
29. ted measuring mode As a general rule one may say the poorer the reflectance of the surface of a particular target the more time the LDM41 42 will require to determine the distance with specified accuracy For example if error message E15 is out put because of poor reflectance and insufficient time to measure this latter setting must be increased The available value range for measuring time is O to 25 Basically the greater the time setting is the more time will be available for measurement and the lower the resulting measuring rate An exception therefrom is zero value In this case the LDM41 42 automati cally picks the smallest possible time value for measurement The LDM41 42 comes factory set with ST 0 ST is effective in the DT DF and DM mode of operation The measuring time setting option can also be used to modify the measuring rate for example in order to restrict the data volume or for synchronization purposes The following sample time setting can only be regarded as provi ding an approximate value Measuring time STx240 ms except ST 0 Example The target distance is 25 m but the target s reflectance is not ideal With a measuring time setting of ST 2 E15 will be output following measurement The user must increase the time to measure in this case 21 4 2 10 SF display set scale factor Standard setting 1 SF multiplies a calculated distance value with a user selectable factor for changes in
30. tting ID AS autostart defines which function will be carried out when power beco mes available to the LDM41 42 Possible entries are those delivering a measured value on the output side an ID command or the command for turning the laser on LO For example if ASDT has been parameterized the LDM41 42 will begin with distance tracking on turning on power 4 2 19 OF display set distance offset Standard setting 0 With the help of OF offset the user may define a zero point for his her application For details on the position of the module zero point refer to section 3 5 Mechanical 6 space 20h 7 only LDM42 24 OF must be selected so it is properly matched to the currently valid scale factor setting SF OF may also take on negative values 4 2 20 SO set current distance to offset offset distance SO performs a distance measurement and saves the measured reading as an offset value with inverted mathematical sign OF 4 2 21 LO laser on LO turns the laser on This function can be used for orientation or functional testing of the LDM41 42 4 2 22 LF laser off LF turns the laser off 4 2 23 PA display settings PA lists all parameters in a table 4 2 24 PR reset settings PR resets all parameters except for baud rate to their standard settings average value SA e0eeeeee 1 display format SD d measure time ST 22 2 0 scale factor
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