Manual DE V1.0 - ASTECH Angewandte Sensortechnik GmbH
Contents
1. 000 0 Use instead of PR the Set Standard command from Windows program LDMTool ASTECH GmbH Interface Connection LDM41PN and LDM42PN Manual 9 Interface Connection 9 1 Profinet General The LDM41PN and LDM42PN is operated as a Profinet IO device It becomes operational with master 16 byte entry data 2x 8 bit error information 16 bit measurement value counter 32 bit time stamp 32 bit distance and 8 bit internal temperature are available 21 bit are reserved One byte of output data is used for control It is possible to switch between various measurement modes In addition the internal equipment temperature can be measured and the laser can be turned off The IP address and the subnet mask will be set via Profinet Master Connection takes place via circular plug in connectors that are in compliance with relevant standards Configuration of measuring time scaling etc takes place via the serial interface see Chapter 8 Parameter Setting The LDM41PN and LDM42PN is configured as a Profinet IO device Note Please ensure that the parameter setting of the LDM4xPN is AN correct The parameter baud rate BR9600 and output format SDh must be set via the serial RS232 interface of the LDM 4x P by using a PC and the LDMTool programme or alternatively a terminal program prior to connection to the Profinet Master Table 13 Meaning of Profinet mode Profinet IN Profinet Configuration 8 bit Error Counter 12. Page 42 ASTECH GmbH LDM41PN and LDM42PN Manual 13 EG Declaration of Conformity C In accordance with the Directive of Electromagnetic Compatibility 2004 108 EG The company ASTECH Angewandte Sensortechnik GmbH in Schonenfahrerstr 5 18057 Rostock Germany herewith declare represented by the signatory that the following designated product Laser Distance Measurement Sensor LDM41PN LDM42PN agree with the following harmonized standard IEC 61326 1 Electromagnetic interference and electromagnetic compatibility EMC including radio interference Rostock 21 September 2010 ASTECH Angewandte Sensortechnik GmbH Jens Mirow General Manager ASTECH GmbH Part Numbers LDM41PN and LDM42PN Manual 14 Part Numbers Table 17 Part numbers Part No 12 2021 00 12 2022 00 12 2023 00 12 2024 00 15 0018 00 15 0040 00 15 0040 01 15 0040 02 15 0019 00 15 2002 00 15 2002 01 11 0001 00 12 2006 00 12 2006 01 12 2006 02 12 2030 00 12 2030 01 12 2010 00 12 2011 00 12 2015 00 11 0006 00 16 2001 01 16 2001 02 17 2000 00 Name LDM41PN LDM42PN LDM41PN h with heating LDM42PN h with heating Male cable connector Ethernet M12 4 pin D coded Connection cable Ethernet M12 RJ45 3m Connection cable Ethernet M12 RJ45 5m Connection cable Ethernet M12 RJ45 10m PC Programming cable RS232 5m Connection cable LDM41PN and LDM42PN 5m Connection cable LDM41PN and LDM42PN 10m USB RS232 Interf
3. Figure 3 Mounting drawing To protect the range finder s optical surfaces from dust physical contact and impacts etc a protection tube has been attached to the casing Please note that measurement cannot be guaranteed to function correctly if the protection tube is removed incorrectly or by unqualified personnel ASTECH GmbH Page 13 Mounting LDM41PN and LDM42PN Manual The interface connector is located on the back cover Interface cables with different length are available standard 2 m optionally 5 or 10 m Figure 4 Offset against zero edge The LDM41PN and LDM42PN 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 8 22 OF display set distance offset Page 14 ASTECH GmbH LDM41PN and LDM42PN Manual 5 Electrical Connection 5 1 LDMRear Side Cover Terminals Connector terminals are located on the rear side cover of the device The terminals consist of 4 buses for metal circular plug in connectors from Binder or compatible connectors sealed against the casing in compliance with IP 65 requirements This connector type guarantees optimised screening and a high IP level The following connection plugs should be used Table 2 LDM41PN and LDM42PN terminals Quantity Connector
4. Terminal Log Window Senal interface Analog Output Calculation History Senal Interlace 005 009 General 005 001 sr fi or fo as fa se 2 PM fo String Oupa Format sp jd Analog Dutput 4 20 mA Re fo RE 40 Digtal Output Calculation Alam Output ac 2 au for Output 1 aw hoo 005 002 Poa Psa Messure Time 0 25 O fast _ Figure 7 LDMTool Note Configuration commands for the analogue output and digital AN alarm output cannot be used for the LDM41PN and LDM42PN ASTECH GmbH Parameters and Control via RS232 LDM41PN and LDM42PN Manual However they do ensure compatibility with the LDM41A and LDM42A without Profinet Prior to commencing measurements desired parameter settings can be entered via a smart selection procedure so as to adapt the LDM41PN and LDM42PN in an optimal manner to specific environments and measuring tasks Such settings will be stored when turning off the LDM41PN and LDM42PN They can only be changed by entering new values or by reinstalling the standard parameter settings Command entries are not case sensitive This means that small and capital lettering can be used for commands Any command must be terminated by a hexadecimal ODh carriage return character Where decimal digits are to be entered they must be separated by period 2Eh For command parameter entries one must distinguish between parameter settings and parameter queries Querying is achieve
5. orange 4 RD RD RJ45 6 green Note Only use connection plugs and Profinet cables that conform to AN the relevant standards 5 4 RS232 Serial Interface The RS232 interface was originally designed as a PC interface only It has now become the standard for serial data transfer for short distances It is subject to interference when used for longer distances in particular in environments with interfering high frequency electromagnetic radiance As a result this Page 16 ASTECH GmbH LDM41PN and LDM42PN Manual interface should only be used for configuring the LDM41PN and LDM42PN Please configure using the programming cable and the LDMTool program Following successful configuration remove the programming cable and protect the terminal with a sealing plug Note Please configure the LDM41PN and LDM42PN prior to connecting the Profinet The receiving line of the RS232 serial interface is deactivated after connecting to the Profinet master Please observe the RS232 standard The maximum extension of the RS232 lines is 15 m Table 5 Pin assignment RS232 Pin Description Colour Comment 1 RxD brown Receiving line 2 TxD white Transmit line 3 GND blue Ground potential Note Following successful programming remove the RS232 cable AN and protect the RS232 cable connector with the enclosed sealing plug against entry of dirt If the cable is to remain connected to the device then a terminal resistance must be attached
6. Ensure that no data line ends are left open HAD Pine since they may be subject to interference RxD Pin 1 EMC A terminator circuit should be installed when 3kQ 2 2nF the RS232 is unconnected Figure 6 Termination R 232 This circuit must be provided by the customer GND Pin 3 see diagram on the left 5 5 Programming Cable Connection to a PC requires the following cable with SUB D 9 F connectors The TxD and RxD signals of the LDM41PN and LDM42PN and the PC connection are crossed The colours apply to the optional programming cable ASTECH GmbH Electrical Connection LDM41PN and LDM42PN Manual Table 6 Pin assignment programming cable Pin LDM 4xP Description Colour 1 RxD brown 2 TxD white 3 GND blue 5 6 Shield and Grounding Pin SUB D9F Description 3 TxD 2 RxD 5 GND Cable shields must be grounded with low resistance Only high quality shielded cables should be used Carrier bases and control boxes should have equal potential Potential differences could lead to electrical currents and may cause EMC problems no correct measurement function or switching the gauge off or on is necessary If no potential equalization is possible then mount the LDM41PN and LDM42PN isolated from the carrier base use nylon screws and washers Connect the screen with mass to the cable end This way of assembly should also be used when installing the LDM41PN and LDM42PN inside vehicles Page 18 ASTECH
7. GmbH LDM41PN and LDM42PN Manual 6 Limiting Values for Voltages Input voltages Table 7 Input voltages Terminal point Voltage VCC 10 V 30 V TxD 13 2 V RxD 25 V TRIG 25 V Output voltages Table 8 Output voltages Terminal point Voltage TxD like VCC R 135 mQ Alarm gt VCC 2V Comment Pole reversal protected Short circuit proof Short circuit proof Short circuit proof Comment max 0 7 A load short circuit proof Level depending on VCC Limiting values of voltages loads and logical levels comply with relevant RS232 and Profinet standards y Trigger function is not available for devices with internal heating LDM41PN h and LDM42PN h ASTECH GmbH Start up LDM41PN and LDM42PN Manual 7 Start up Ensure that all cable ends are protected against short circuit prior to turning on the power supply Connect cable terminals as required for the particular operating mode A pole reversal protection is included so as to prevent the destruction of electronic components Connection to the Profinet master should only take place following start up Note Please turn on the LDM41PN and LDM42PN prior to connecting the Profinet The receiving line of the RS232 serial interface is deactivated after connecting to the Profinet master Turning on the LDM41PN and LDM42PN requires a PC with a corresponding COM1 data interface an optional programming cable and a terminal programme We rec
8. Laser Radiation Class 2 ee ee Ee Ee ee ee ee 9 gt MOUNTING drawing cccccccccceceessssssecececsesesessecececeeseeseesecsceeseeeaeees 13 Offset against zero edBe ie ee ee RR ee ee ee ek ee 14 LDM41PN and LDM42PN terminals ees ee se ee ee Re ee RA Re 15 Termination RS232 LDMTOOI ees sesse ss ee Digital switching output behavior GSD data and bitmap iese esse se se ee ee ee RA ee AR Ee Re ee ee Ee ee ke ee List of Tables To all ede ER AR OE 11 LDM41PN and LDM42PN terminals sees ses ee ee ee ee ee RA ee 15 Pin assignment power supply alarm and trigger sesse ees se se ee ee 16 Pin assignment Profibus DP ees se Ee ee ee ER Re AA ee ee Ke ee 16 Pin assignment RS232 sesse se se se ee ee ER ER ER ER ER Ee ER ER ER ER ER ee ee ee ee ee ee inina Pin assignment programming cable Dele N ER ER OR N Output voltageS esse se se ee ee ee Ee ee ee AE Ee ee ee ee ee ee ee ee ee ee ee Command list LDM41PN and LDM42PN ee ee ee RR ee ede delg EE EE ER EE EE EE EN Examples of scale factOF e ese se se ee ee Ee Ge ER ee Ee Re ee ee ee Ge ee Meaning OFSE sissies seine ees eende Ese ee Rd OER ee ee aiaa aat Meaning of Profibus DP modes iese se se ee ee ee ee ee Profibus error code ees ee ee ee saeni eiorinn ee LDM41PN and LDM42PN command list Error COC CS 4 Ee eeaeee ee Re Re ee Ke aa Re De ee be Ed Part numbers EE EE se ER GR GE Ge ee Ge ER GE Ee ASTECH GmbH Gen
9. SD selects the output format of measured value data There are three modes available Table 10 Output format Parameter Output Format d decimal XXX XXX lt CR gt lt LF gt x 0 9 h hexadecimal lt SPACE gt xxxxxx lt CR gt lt LF gt x 0 F s decimal with signal quality xxx xxx lt SPACE gt yyyyyy lt CR gt lt LF gt x 0 9 y 0 9 SD affects all commands that output a distance value An output value is calculated from a given measured distance value in mm multiplied by the scale factor SF Page 26 ASTECH GmbH LDM41PN and LDM42PN Manual Negative distance values are output in two s complement notation The value for the signal quality varies between O and 1024 O means a bad signal quality while 1024 indicates a very good signal quality Examples Distance 4 996 m SF1 dec 004 996 lt CR gt lt LF gt hex lt SPACE gt 001384 lt CR gt lt LF gt 4996 mm x SF1 dectsig 004 996_000005 lt CR gt lt LF gt bad signal quality dec sig 004 996_000985 lt CR gt lt LF gt good signal quality Distance 4 996 m SF10 dec 049 960 lt CR gt lt LF gt hex _00C328 lt CR gt lt LF gt 49960 4996 mm x SF10 dec tsig 049 960_000005 lt CR gt lt LF gt Error case dec hex E15 lt CR gt lt LF gt see 11 Error Codes RS232 and Profinet 8 11 ST display set measure time 0 25 Measuring time is directly conditional on the selected measuring mode As a general rule one may say the poorer the reflecta
10. Type Use 1 4 pin male cable connector Profinet series 715 B from Binder 1 5 pin male cable connector RS232 series 713 from Binder 1 5 pin female cable connector Power supply trigger input series 713 from Binder and digital output until Dec 2006 4 pin male cable connector Note Various connectors and cables are available Please ensure that only shielded connectors and shielded cables are used RS232 Profinet O Power supply trigger input and digital output 10 OM Figure 5 LDM41PN and LDM42PN terminals ASTECH GmbH Electrical Connection LDM41PN and LDM42PN Manual 5 2 Assignment of Terminals The required power supply is 10 to 30 V DC The trigger input allows for a distance measurement via an external signal in the form of a voltage impulse from 3 to 24 V only DF mode please see Chapter 8 Table 3 Pin assignment power supply alarm and trigger Pin Description Colour Comment 1 VCC brown Power supply 10 to 30 V 2 ALARM white Digital Output 2 VCC 2 V 3 GND blue Power supply 0 V 5 Trigger gray Trigger input 3 to 24 V ground potential GND 5 3 Profinet The LDM41PN and LDM42PN has two terminals input and output for circular plug in connectors series 715 B for Profinet from Binder conforming to the relevant standards Table 4 Pin assignment Profinet Pin Description Comment 1 TD TD RJ45 1 white orange 2 RD RD RJ45 3 white green 3 TD TD RJ45 2
11. an on board vehicle supply point an industrial direct voltage supply net or a DC power pack Features consistently low power consumption of lt 3 5 WY without laar Up to 30 m reach for distance measurement with potential for more than 100 m reach if additional reflectors are mounted onto the target depending on reflectance and environmental conditions Visible Laser beam for easier sighting Output and control via Profinet Measured values can be displayed in meters decimetres centimetres feet and inches due to Option for remote triggering of a measurement from an external trigger device Large range of accessories available inactive internal heating for devices with internal heating LDM41PN h and LDM42PN h e g 3M self adhesive foil white non glossy or foil 3290 for longer distances ASTECH GmbH Safety Instructions LDM41PN and LDM42PN Manual 2 Safety Instructions 2 1 General Safety Instructions These safety and operating instructions should be carefully read and followed during practical work with the LDM41PN and LDM42PN There is danger of Laser radiation or electrical shock For necessary AN repair work the LDM41PN and LDM42PN 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 nonconforming prod
12. ee ee Se ee 26 8 9 SA display set average value 1 20 ees ee ee ee ee ee ee Re ee ee 26 8 10 SD display set display format d h sM esse sesse ee ee ee ee ee Re ee ee 26 8 11 ST display set measure time 0 25 esse esse ee see ee ee ee RR ee Ge ee 27 ASTECH GmbH Page 3 Content LDM41PN and LDM42PN Manual 8 12 SF display setscalefactOF iese ee ee ee ee Re ee ee Re ee ee ee Re ee ee ee 28 8 13 SE display set error mode O 1 2 ees ee ee ee ee ee RR ee ee 29 8 14 AC display set ALARM center issie iss se ees ee ee se ee ee ee ee ee ee ee 29 8 15 AH display set ALARM hystereS esse ee ee ee ee ee Re ee ee ee Re ee Ge ee 30 8 16 AW display set ALARM width ccccsccccscccsssceeseecsseceeseecsseeeeeees 30 8 17 HO display set Temperature for heating ON esse see se se ee ee 30 8 18 HF display set Temperature for heating Off esse esse ee ee ee 31 8 19 TDxy display set trigger delaytriggerlevel iese ee se ee ee ee 31 8 20 BR display set baud rate 2400 38400 iese ee ee ee ke ee ee 31 8 21 AS display set autostart command iss see ee ee ee ee ee Re ee ee 32 8 22 OF display set distance OffSet ees ese ee ee ee ee ee Re ee ee ee Re ee ee ee 32 8 23 SO set current distance to offset iss ee se ee ee Re ee 32 Le baser ON RE OR EO eE 32 825 LF laser OT siusE GEES SG SEE GSSESG ERGE GR GERS NEES DERS SS E ER AE G EED REEDE R GEE DE EE RED 3
13. gt see page 41 chapoter 11 Error Codes RS232 and Profinet 9 4 Digital Switching Output Alarm With the help of a user selectable distance threshold the switching output can be set to monitor objects or conditions for positive or negative overstep ASTECH GmbH Interface Connection LDM41PN and LDM42PN Manual For example using the digital switching output an object which was selected for measurement can be monitored for excision of a threshold value To do this parameter settings for a measurement window are reguired Settings for this window can be made via the three parameters Alarm Center AC Alarm Hysteresis AH and Alarm Width The range which will be subject to monitoring begins at AC and ends at AC AW Switching transitions can be set via parameter AH The logic state of the switching output follows from the mathematical sign of AH In the case of a positive AH the output switches with increasing distance from LOW to HIGH if the distance is greater than AC AH 2 from HIGH to LOW if the distance is greater than AC AW AH 2 with decreasing distance from LOW to HIGH if the distance is smaller than AC AW AH 2 from HIGH to LOW the distance is smaller than AC AH 2 In the case of a negative AH the output switching pattern will be inverse AH AH k k tAH AH HIGH LOW LOW HIGH 1 AC AW Dist p Figure 8 Digital switching output behavior with positive and negative hysteres
14. increase the time ST gt 2 or set auto ST 0 to measure in this case One should work in DW or DX measuring mode where stable measuring times are required 8 12 SF display set scale factor SF multiplies a calculated distance value with a user selectable factor for changes in resolution or outputs in a different unit of measure The scale factor may also be negative Standard setting is 1 The scale factor influence the output of measurement results Offset OF Alarm Centre AC Alarm Hysteresis AH Range Begin RB and Range End RE Page 28 ASTECH GmbH LDM41PN and LDM42PN Manual Table 11 Examples of scale factor Scale factor Resolution Output Output Unit 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 SFO 3937 1 inch 4 860 100 inch SF 1 1 mm 12 345 m Note Following a change in the scale factor the settings for digital and or analog output and offset must be matched accordingly 8 13 SE display set error mode 0 1 2 SE error mode allows you to configure the behaviour of the digital switching output alarm and or the analog output following an error message E15 E16 E17 Depending on the particular LDM41PN and LDM42PN application environment error messages have to be handled in different ways Available setting options are 0 1 and 2 with the following effects in the case of an error Table 12 Meaning of SE SE Digital switching outp
15. time time to measure can be limited via ST parameter settings ESC stops the measurement 84 DW distance tracking with target board 10 Hz 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 As a necessary precondition for measured values to be stable a white target board must be placed at the selected object There must be no sudden jumps in distance greater than 16 cm within the measuring field Page 24 ASTECH GmbH LDM41PN and LDM42PN Manual ESC stops the measurement 8 5 DX distancetracking with target board 50 Hz 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 only LDM42 As a necessary precondition for measured values to be stable a white target board must be placed at the selected object This measurement mode is intended in the first place for objects performing homogeneous motion up to 4m s For higher rates of measurement preceding measured values will be included in the process to calculate a currently measured value There must be no sudden jumps in distance greater than 16 cm within the measuring field Caution To prevent transmission problems please use 9600 baud AN as the minimal baud rate for DX Mode 8 6 DF distance measurement with external trigger Input parameter SD SE SF ST OF TD S
16. 2 8 26 PA display settings iese es see ee ee Ge Ee Re ee Ee ee ee ee ee 33 8 27 PR reset settings ok BE Ses AE Dee Se GE ON Dee Se oe be OE ee SR DE 33 9 Inteiface COnne HON ese cs Ee NE EE Ee ES Re ee ED GE eine be se 34 9 1 Profinet ES ek Sees Berea ease tat bbl EE GE GE N n de 34 9 2 Serial Interface RS232 EERS EDGE SEE eg AE de Ee RD Ie Ee Ge ke De 36 9 3 Output Format Ethernet and RS232 iese se se ee ee ee Ee ee ee ee 36 9 4 Digital Switching Output Alarm ees sesse ee ee ee Ee Re ee ee ee 37 9 5 Trigger E SE oe Es Dee Eg dek Sek De Se N Ee Dee Ego neg ee oek bee ee ae 39 10 List of Commands ii EEN Ee ee GR RE ES SN baka beens 40 11 Error Codes RS232 and Profinet cccssccecssstececseececeeseeeceeeeeeeseeeeeeeeas 41 12 GGSDML Data ie veer esse ee sh ese EER Eben seccuacessdceheeseeadaceecnecdenaeecuecdece 42 13 EG Declaration of ConformitY iese ss se se ee ee ee Ee ee ee AE Ee ee ee ee ee 43 14 Part NUMBERS Sree indie bosse eed EE iat mien ee eg OE ee ah Ee 44 Page 4 LDM41PN and LDM42PN Manual Content Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16 Table 17 List of Figures Measurement principle iii iss se ee ee ee ee ee ee RA ee AE ee ee ee ee 6 Warning Sign
17. 2PN h ASTECH GmbH List of Commands LDM41PN and LDM42PN Manual 10 List of Commands Table 15 LDM41PN and LDM42PN command list Command DT DS DW DX DF DM TP SA SD ST SF SE AC AH AW HO HF TD BR AS OF SO LO LF PA PR Description Starts distance tracking Starts distance tracking lt 7 m Starts distance tracking on white target at 10 Hz Starts distance tracking on white target at 50 Hz only LDM42PN Starts remote triggered single distance measurement single shot Starts single distance measurement single shot Queries inner temperature Queries sets floating average value 1 20 Queries sets output format dec hex sig Queries sets time to measure 0 25 Queries sets scale factor Queries sets error mode 0 1 2 Queries sets alarm center Queries sets alarm hysteresis Queries sets alarm with Queries sets temperature for heating on Queries sets temperature for heating off Queries sets trigger delay and level Queries sets baud rate Queries sets auto start Queries sets offset Sets current distance as offset Turns Laser on do not use please use DT Turns Laser off Displays all parameter values Resets all parameters to standard values don t use 4 Only for devices with internal heating LDM41PN h and LDM42PN h Page 40 ASTECH GmbH LDM41PN and LDM42PN Manual 11 Error Codes R 232 and Profinet Table 16 Error c
18. 6 byte IN 8 bit Error Code 1 byte OUT 16 bit Counter 32 bit Time Stamp Page 34 ASTECH GmbH LDM41PN and LDM42PN Manual 32 bit Distance 8 bit Temperature 21 bit reserved Profinet IN Explanation of Error Codes Table 14 Profinet error codes Code Description 0 0x00 Received valid measurement value Error Counter and Code are set to zero 15 OXOF Reflexes too weak use target board or distance from LDM front edge is out of range 16 0x10 Reflexes too strong use target board 17 0x11 Too much constant light e g sun 23 0x17 Temperature below 10 C 24 0x18 Temperature above 50 C 61 0x3D Faulty command 255 Invalid string from LDM4xPN e g hexadecimal output has not OxFF been set Profinet IN Explanation of Additional Binary Values Error Counter Number of errors after last valid measurement value Counter Increased for each new valid measurement value Time Stamp Set for each new valid measurement value ms Profinet OUT Explanation of Control Byte The control byte sets the Measuring Mode via Bit 0 to 2 For a description of the various Modes please see Chapter 8 Bit 3 to 5 are reserved and can be set to 0 If Bit 6 has been set to 1 then the actual measuring value is kept If Bit 6 is set from O to 1 the 1 0 slope is also activated This slope will provide a new 18 Scaling depends on LDM 4xP parameter settings 19 Displays the internal temperature in C if the control
19. Manual LDM41PN and LDM42PN Version 1 0 CE LDM41PN and LDM42PN Manual Dear User You are advised to carefully read this User Manual before powering on the LDM41PN and LDM42PN Laser distance measuring sensor for the first time This is necessary to ensure that you will be able to utilize all the capabilities and features which your new acduisition provides This technology is subject to continuously ongoing development Editorial deadline March 2015 Firmware version 27 05 and 8 06 Manual version V1 0 Flle Manual LDM41 42PN EN V1 0 docx Note Proper care has been used in compiling this document No liability will be accepted in the event of damage resulting from failure to comply with the information contained herein Revisions history Manual Version Date Changes 1 0 16 03 2015 First release ASTECH GmbH Schonenfahrerstr 5 D 18057 Rostock Internet www astech de E Mail info astech de Telefon 49 0 381 44073 0 Telefax 49 0 381 44073 20 Page 2 LDM41PN and LDM42PN Manual Content l Content 1 Generaler e EO N OR RE N OE 6 2 Safety nd ee ie ER OR EN EE EN 8 2 1 General Safety Instructions iese ees se se ee ee Re Re ee ee Re ee ee ee 8 2 2 Intended amp Conforming USe is ee ee Ee Ee Re AR ER Ge ee ee 8 2 3 N conforming USE ses EERS Re NEE ESE ER Ee ee ee ok ERA Ne oe ees EE 8 2 4 Laser ClassiticatiO Miss es DE Re eke tesnenia easain 9 2 5 Electric SUPPLY seine esse siek be
20. T SA RM Output RS232 RS232 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 LDM41PN and LDM42PN will send data and switches to digital and or analog output Settings for trigger delay delay and trigger slope can be defined via parameter TD see 8 19 TDx y display set trigger delay trigger level With ST 1 the maximum trigger frequency should not exceed 3 5 Hz Trigger function is not available for devices with internal heating LDM41PN h and LDM42PN h ASTECH GmbH Parameters and Control via RS232 LDM41PN and LDM42PN Manual 8 7 DM distance measurement Input parameter SD SE SF ST OF Output RS232 RS232 digital switching output analog output DM mode triggers a single measurement single shot 8 8 TP internal temperature C TP queries the value of the inner LDM41PN and LDM42PN temperature Note In tracking mode the inner temperature may exceed the surrounding temperature level by as much as 10 K 8 9 SA display set average value 1 20 SA allows you to calculate a floating average value from 1 to 20 measured values Calculation is based on this formula X t XI Xn 20 Average value X n Standard setting is 1 no average 8 10 SD display set display format d h s
21. ace converter 0 2m Protection window Standard for LDM4x Serie Protection window Quartz glass for LDM4x Serie Protection window Sapphire glass for LDM4x Serie Gray filter 2 fach for LDM4x Serie Gray filter 4 fach for LDM4x Serie Reflection foil matte white A4 Highly reflective foil silver A4 Protection tube for pressure air for LDM4x Serie ASTECH USB Stick Documentation and Software Printed Manual LDM41PN and LDM42PN A5 DE Printed Manual LDM41PN and LDM42PN A5 EN License number for PC Software LDMTOOL for LDM3x und LDM4x Note Several single sensors are also available as packages including sensor and cable manual and CD sets Additionally are other protection enclosures with and without a thermostat available Page 44 ASTECH GmbH LDM41PN and LDM42PN Manual Notice ASTECH GmbH Notice LDM41PN and LDM42PN Manual Page 46 ASTECH GmbH
22. alid SF scale factor AW is always equal or greater than 0 zero AW is always equal or greater than AH the amount of AH Standard setting is 100000 means off 8 17 HO display set Temperature for heating on HO displays sets the temperature value at which the internal heating is switched on The values can be varied between 40 C and 70 C Standard setting is 3 C 16 Only for devices with internal heating LDM41PN h and LDM42PN h Page 30 ASTECH GmbH LDM41PN and LDM42PN Manual 8 18 HF display set Temperature for heating off HF displays sets the temperature value at which the internal heating is switched off The values can be varied between 40 C and 70 C Standard setting is 12 C 17 8 19 TDx y display set trigger delay trigger leve TD is only intended for the configuration of the remote trigger input see 8 6 DF distance measurement with external trigger TD consists of two sub parameters 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 measurement is to begin on a rising or a falling pulse slope Trigger delay and trigger level must be separated by space 20h in the entry line Standard setting 0 0 Xx Delay time between trigger s
23. byte has been set on the TP mode activation HI LO slope bit 6 2 E g 3M self adhesive white non glossy foil ASTECH GmbH Interface Connection LDM41PN and LDM42PN Manual measurement for the DM single measurement mode and TP temperature measurement For all other modes Bit 6 generally remains set at 0 To turn off the Laser and switch the LDM41PN and LDM42PN to standby operation Bit 7 should be set at 1 The remaining bits have no meaning If all bits are set at 0 then the LDM41PN and LDM42PN will operate in the DT mode Distance Tracking continuous measurement 7 6 5 4 3 2 1 0 Modes Reserved 000 DT continuous 001 DW continuous Hold 010 DF waiting for external trigger 011 DX continuous only LDM42 P Laser off 100 TP single 101 DM single 110 DS continuous 9 2 Serial Interface RS232 Initially RS232 communication interfaces purely functioned as PC communication 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 LDM41PN and LDM42PN configuration The commands of the serial interface are described in chapter 8 starting page 21 The data output format is determined by parameter SD display
24. d 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 The following is a short overview of the commands Table 9 Command list LDM41PN and LDM42PN Command Description DT Start distance tracking DS Start distance tracking lt 7 m Page 22 ASTECH GmbH LDM41PN and LDM42PN Manual Command DW DX DF DM TP SA SD ST SF SE AC AH AW HOT HF TD BR AS OF sO LO LF PA PR Description Start distance tracking on white target at 10 Hz Start distance tracking on white target at 50 Hz nur LDM42PN Start remote triggered single distance measurement Start single distance measurement Queries inner temperature Queries sets floating average value 1 20 Queries set output format dez hex sig Queries set time to measure 0 25 Queries set scale factor Queries set Error Mode 0 1 2 Queries set alarm center Queries set alarm hysteresis Queries set alarm width Queries set temperature for heating on Queries set temperature for heating off Queries set trigger delay and level Queries set baud rate Queries set auto start Queries set offset Sets current distance as offset Turns Laser on Turns Laser off Displays all parameter values Resets all parameters to standard va
25. eactivated 3625 after connecting to the Profinet master high side switch programmable switching threshold and hysteresis rated for max load of 0 5 A HIGH UB 2 V LOW lt 2 V External trigger trigger pulse 3 up to 24 V pulse length2 1 ms start of measurement 5 ms trigger delay trigger slope and delay can be set 0 ms 9999 ms EN 61326 1 10g 6ms Persistence shock DIN ISO 9022 3 31 01 1 Laser class 2 under EN60825 1 2007 Class 2 650 nm red visible 0 6 mrad Better than 1 to the ground plane 100 000 h at 60 C Laser temperature intern 12 pol M18 male socket Binder Serie 423 212 mm x 96 mm x 50 mm 100 mm x 85 mm 4 x M6 holes approx 850 g IP 65 spatter water and dust protection trigger function is not available for devices with internal heating LDM41 42PN h 1 at 10 m distance the beam diameter is 6 mm at a distance of 50 m it is 3 cm and at a distance of 100 m it is 6 cm Page 12 LDM41PN and LDM42PN Manual Mounting 4 Mounting The casing consists of a rugged corrosion resistant extruded aluminium profile with front side and rear side covers also of corrosion resistant design Four mounting holes are provided in the base plate for mounting the LDM41PN and LDM42PN 198 AR IP 210 G TT 5 50 100 85
26. eral LDM41PN and LDM42PN Manual 1 General The LDM41PN and LDM42PN are Laser sensors 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 LDM41PN and LDM42PN performs depending on the reflectance morphology and qualities of the target to be measured The sensor works based on comparative phase measurement It emits modulated Laser light which is diffusely 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 eN LDM 40 Laser beam meas beam Target Figure 1 Measurement principle 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 auto start 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 chapter 8 Parameters and Control via RS232 of this User Manual Page 6 LDM41PN and LDM42PN Manual Special performance features are Provides high accuracy and great reach under extreme outdoor temperatures Works in a wide range of operating voltages from 10 V to 30 V from
27. example glass optical filters Plexiglas etc may equally produce incorrect results Measurement on translucent objects materials allow light to pass through but are not transparency e g polystyrene wax different plastics etc can give a too large measured value since also light is reflected by deeper layers Rapidly changing measuring conditions are likely to falsify the result of measurement 2 4 Laser Classification The LDM41PN and LDM42PN is a Class 2 laser product lt 1 mW as stipulated in EN60825 1 2007 Class 2 Caution There is Class 2 Laser radiation Do not stare into beam Figure 2 Warning Sign Laser Radiation Class 2 The Laser power is limited to maximum 1 mW The Laser radiation is visible A short term exposure duration up to 0 25 s is harmless to the eye ASTECH GmbH Safety Instructions LDM41PN and LDM42PN Manual Users are instructed by Laser warning sign see Figure 2 to do not stare into the beam They have to protect themselves by turn the head and or closing the eyes and by avoid a long look into the beam Do not direct the Laser beam onto persons The sensor can use without any additional safety protection 2 5 Electric Supply Use only 10V to 30V DC direct voltage for LDM41PN and LDM42PN 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 Impo
28. format see page 26 9 3 Output Format Ethernet and RS232 The output format on the serial interface is selected by the command SD There are three modes available Parameter Output Format 21 New temperature measurement second and subsequent at Bit 6 Hold 1 0 slope 2 New distance measurement second and subsequent at Bit 6 Hold 1 0 slope Page 36 ASTECH GmbH LDM41PN and LDM42PN Manual d decimal XXX XXX lt CR gt lt LF gt x 0 9 h hexadecimal lt SPACE gt xxxxxx lt CR gt lt LF gt x 0 F S Decimal with signal xxx xxx lt SPACE gt yyyyyy lt CR gt lt LF gt quality x 0 9 y 0 9 SD affects all commands that output a distance value An 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 The value for the signal quality varies between O and 1024 0 means a bad signal quality while 1024 indicates a very good signal quality Examples Distance 4 996 m SF1 dec 004 996 lt CR gt lt LF gt hex lt SPACE gt 001384 lt CR gt lt LF gt 4996 mm x SF1 dectsig 004 996 _000005 lt CR gt lt LF gt bad signal quality dectsig 004 996 _000985 lt CR gt lt LF gt good signal quality Distance 4 996 m SF10 dec 049 960 lt CR gt lt LF gt hex _00C328 lt CR gt lt LF gt 49960 4996 mm x SF10 dectsig 049 960_000005 lt CR gt lt LF gt Error case dec hex E15 lt CR gt lt LF
29. ignal and start of measurement delay can be set from 0 to 9999 ms y 0 for HIGH gt LOW slope 1 for LOW gt HIGH slope Example TD1000_O Enter In the given example the delay has been set to 1000 ms and the trigger slope to rising LOW to HIGH transition 8 20 BR display set baud rate 2400 38400 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 1 Trigger function is not available for devices with internal heating LDM41PN h and LDM42PN h ASTECH GmbH Parameters and Control via RS232 LDM41PN and LDM42PN Manual data bits with no parity and one stop bit is used Standard setting is 9600 baud 8 21 AS display set autostart command AS auto start defines which function will be carried out when power becomes available to the LDM41PN and LDM42PN 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 LDM41PN and LDM42PN will begin with distance tracking on turning on power 8 22 OF display set distance offset 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 s zero point refer to section Fehler Verweisquelle konnte nicht gefunden werden OF must be selected so it is properly matched to the curren
30. is Example A moving object is assumed to be monitored within a window of 10 m to 11 m with a hysteresis of 0 2 m AC10 AHO 2 AW1 Page 38 ASTECH GmbH LDM41PN and LDM42PN Manual Distance m increases gt 9 8 99 100 10 1 10 2 ass 11 0 111 112 11 3 AH L L L H H H H L L L AH H H H L L L L H H H Distance m decreases 11 3 11 2 11 1 11 0 10 9 10 8 ve 100 99 98 AH L L L L H H H AH H 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 E15 E16 E17 E18 can be defined by making suitable settings under SE see 8 13 SE display set error mode 0 1 2 9 5 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 This input is used only in trigger mode DF DF distance measurement with external trigger It is for the user to specify a desired delay time and a pulse slope to be selected for synchronization see 8 19 TDx y display set trigger delay trigger level The distance measurement will always be started with a delay of 5 ms in addition with the programmed trigger delay time Having done this the LDM41PN and LDM42PN has to be switched to trigger mode see 8 6 DF distance measurement with external trigger 23 Trigger function is not available for devices with internal heating LDM41PN h and LDM4
31. k es sker Gen EE se gs denk we oe Re eke Ge de de 10 2 6 Important Operating Advice see ees se Ee ee ee Ee ee ee ee ee ee 10 3 TechnicaliDatas sessie esse ee see Rees aiaa Dee EE DE Ge 11 4 MOUNTING EE EE ER N EE NG Ed 13 5 Electrical ConimeEtiON ER EERS RE a EE ee see Red 15 5 1 LDMRear Side Cover Terminals cccccssccecsecceceeseeeecesseeeeseneeeeneas 15 5 2 Assignment of Terminals cccsccccccecsesssssceceeeceeseseseeeeesceesesaaeees 16 5 3 de il EE OE OE 16 5 4 RS232 Serial Interfa EE iss RES ESEG EN SE RE Ee BEG ED Ee EG DEER GE EER 16 5 5 Programming Cable iese ees ee Ee ee ee AR Ee ee ee ee Ge Ge ee ee ee ee 5 6 Shield and Grounding 6 Limiting Values for Voltages i iss se ee ee Ee ee Re Re Ee Re ee ee ee Ge eke ee 19 7 Start UD sos nes OE EA EE RE EE N 20 8 Parameters and Control via RS232 esse see ee se se ee Re ee Ge Re ee ee ee ee ee ee 21 8 1 el ER RE a E 21 8 2 DT distance tracking siese se se ee ee Se ER ee ee Ge ee ee ee ee 24 8 3 DS distance tracking lt 7 M ees eek ee ee ee ee ee ee Re ee ee ee 24 8 4 DW distance tracking with target board 10 Hz sesse see ee se 24 8 5 DX distance tracking with target board 50 HZ cccccceeseeceees 25 8 6 DF distance measurement with external trigger esse se se ee 25 8 7 DM distance measurement sesse se ee RA ee Ge Re ee 26 8 8 TP internal temperature PC esse ss se se ee ee Ee Ee Re
32. lues don t use Trigger function is not available for devices with internal heating LDM41PN h and LDM 42PN h 14 Only for devices with internal heating LDM41PN h and LDM42PN h ASTECH GmbH Parameters and Control via RS232 LDM41PN and LDM42PN Manual 8 2 DT distance tracking Input parameter SA SD SE SF ST OF Output RS232 RS232 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 LDM41PN and LDM42PN uses internal algorithms to continuously evaluate the quality of the Laser radiation signal that is coming back This may cause longer measuring times in the case of poor reflectance or sudden jumps in distance The minimum time to measure is 240 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 ESC stops the measurement 8 3 DS distance tracking lt 7 m Input parameter SA SD SE SF ST OF Output RS232 RS422 digital switching output analog output Operation in DS mode makes sense where different types of surfaces have to be measured at close range up to 7 m Compared to DT measuring mode it allows a higher measurement rate Within the range from 0 1 m to 0 5 m measuring accuracy is restricted 4 mm Measuring
33. nce of the surface of a particular target the more time the LDM41PN and LDM42PN will require to determine the distance with specified accuracy For example if error message E15 is output because of poor reflectance and insufficient time to measure this latter setting must be increased ASTECH GmbH Parameters and Control via RS232 LDM41PN and LDM42PN Manual 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 there from is zero value In this case the LDM41PN and LDM42PN automatically picks the smallest possible time value for measurement The LDM41PN and LDM42PN 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 Measuring time can only be set as an approximate value because the underlying principle of measurement is subject to certain variances that cannot be accounted for DT measuring mode gt measuring time ST x 240 ms except ST 0 DS measuring mode measuring time ST x 150 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
34. odes Code E15 E16 E17 E18 E23 E24 E31 E51 E52 E53 E54 E55 E61 E62 E63 E64 Description Reflexes are too weak or distance from LDM front edge to target is less than 0 1 m Reflexes are too strong Too much steady light e g sun or reflexes are too strong DX mode only LDM42PN reflexes too weak or distance from LDM front edge to target is less than 0 1m Inner temperature below 10 C Inner temperature above 60 C EEPROM checksum error Failed to set avalanche voltage Excessively high Laser current Laser defect Division by 0 Hardware error PLL range Other hardware error Invalid command Wrong parameter wrong command SIO overflow SIO framing error 3 e g 3M self adhesive foil matte white Action Use white target board or increase distance to target Use white target board or filter Use aperture or filter or white target board Use white target board or increase distance to target Heading necessary Cooling necessary Necessary to repair Necessary to repair Necessary to repair SF must be unequal of zero or necessary to repair Necessary to repair Necessary to repair Correct input Check data transmission Check data transmission Check data transmission ASTECH GmbH GSDML Data LDM41PN and LDM42PN Manual 12 GSDML Data The GSDML File for the LDM41PN and LDM42PN device can be downloaded from the ASTECH Website Figure 9 GSD data and bitmap
35. ommend the use of the following programme LDMTOOL Version 4 5 or higher When turning on the LDM41PN and LDM42PN it must be properly installed at the designated operation site aimed at the target and kept in a stable position Targets to be measured e g machine or system components should preferably have a light and homogeneous surface Several optional reflex foils are available AN Caution Do no use any retro reflectors Alignment of the LDM41PN and LDM42PN is facilitated by a visible laser beam that can easily be turned on from a PC Operating voltage supply occurs via the power supply terminal see Chapter 5 1 Depending on ambient light and target conditions Page 20 ASTECH GmbH LDM41PN and LDM42PN Manual 8 Parameters and Control via RS232 8 1 General It is easy to configure the LDM41PN and LDM42PN by using a PC as it provides a wide range of operating functions Configuration should take place prior to connecting to the Profinet Caution If the LDM41PN and LDM42PN has been configured via the Profinet Master then the PC interface RS232 can no longer be used to enter commands However the LDMTool programme can be used for display distance values By selecting the ID Enter command you may call up the menu with the available set up commands i LOMTool LOM4X Simulation fle Parameter Commands Qptons tiep SUS TT BH ANKE YT Paramotor Timing s 005 006 m 0 Device Diagram
36. p or auto Mode DT 0 1 s 10 Hz mode DW at white surface 20 ms 50 Hz mode DX at white surface only LDM42PN lt 4 m s in DX Mode LDM42PN only lt 2 5 m s in DX Mode LDM42PN only 10 C up to 50 C 40 C up to 50 C LDM41PN and LDM42PN h only 40 C up to 70 C 10 V 30 V DC protected against polarity reversal Depending on operation mode lt 2 5 W in Standby lt 4 0 W for distance tracking lt 24 W with heating active LDM4x A h only dependent on target reflectance stray light influences and atmospheric conditions e g 3M self adhesive foil white non glossy 5 statistic spread 95 for measurement at a planar white target surface in continues movement or still standing 15 up to 30 C dependent on target reflectance stray light influences and atmospheric conditions 5 please use only 24V DC For devices with heating LDM41PN h and LDM42PN h The heater is connected directly to the power supply ASTECH GmbH Technical Data LDM41PN and LDM42PN Manual Profinet interface Data interface Digital switching output Trigger input EMC Shock resistance Laser Class Wave length Laser divergence Laser angle tolerance Average service life Connector Dimensions LxWxH Mounting Weight Protection class Profinet Device ID Device Name Idm4x pn 13 Byte IN 1 Byte OUT RS232 baud rate 9600 2400 38400 ASCII Format 8N1 fix receive path is d
37. rtant Operating Advice To make full use of the system s inherent performance capabilities and achieve 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 parts with bare hands Proceed with care when removing dust or contamination from optical surfaces Prevent shock impacts during transport and use of the LDM41PN and LDM42PN Prevent overheating of the LDM41PN and LDM42PN Prevent major temperature variances during LDM41PN and LDM42PN operation In accordance with IP65 internal protection standards the LDM41PN and LDM42PN is designed to be splash proof and dustproof Read these safety and operating insturctions with due care and follow them in practical use Page 10 LDM41PN and LDM42PN Manual 3 Technical Data Table 1 Technical data 3 Measurement range F 5 Measuring accuracy Resolution Reproducibility Measuring time Target motion speed Acceleration Operating temperature Storage temperature Supply voltage Power consumption 0 1 m up to 30 m with natural surfaces depending on target reflectance or reflectors more than 100 m achievable 2 mm under defined measuring conditions 3 mm 15 C up to 30 C 4 mm in DS mode lt 0 5 m 15 C 30 C 5 mm 10 C up to 50 C 0 1 mm user scalable standard 1 mm 0 5 mm 0 24to6s setu
38. tly valid scale factor setting SF OF may also take on negative values Standard setting 0 8 23 SO set current distance to offset SO performs a distance measurement and saves the measured reading as an offset value with inverted mathematical sign OF 8 24 LO Laser on LO turns the Laser on This function can be used for orientation or functional testing of the LDM41PN and LDM42PN After the command LO it s necessary to send LF Don t use LO because this Please use instead of LO the command DT to turn the Laser on 8 25 LF laser off LF turns the Laser off Page 32 ASTECH GmbH LDM41PN and LDM42PN Manual 8 26 PA display settings PA lists all parameters in a table 8 27 PR reset settings PR resets all parameters except baud rate After this a new configuration of the LDM41PN and LDM42PN is necessary average value SA 0eeeeeeee 1 display format SD d measure time ST 00000eeeee 0 scale factor SF c cece eens 1 error mode SE 0c eee eens 1 ALARM center AC 00000005 1000 ALARM hysterese AH 00005 0 1 ALARM width AW 0 e00es 100000 distance of Iout 4mA RB 1000 distance of Iout 20mA RE 2000 remove measurement RM 000 trigger delay trigger level TD 0 0 trigger mode trigger level TM 0 1 baud rate BR 0 0c eee eee ees 9600 autostart command AS 5 ID distance offset OF
39. uct usage may cause physical injury to the user or material damage to the LDM41PN and LDM42PN Cable connectors must not be plugged or unplugged under voltage 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 storage Operation at correct voltage level Application of specified signal levels to the appropriate data lines 2 3 Nonconforming use Do not operate the LDM41PN and LDM42PN 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 LDM41PN and LDM42PN must not be carried out by anyone other than authorized personnel Page 8 LDM41PN and LDM42PN Manual Refrain from using the LDM41PN and LDM42PN without certified protection in an explosive environment Measurement with the LDM41PN and LDM42PN pointed at the sun or other strong light sources may produce faulty results Measurement of targets with poor surface reflectance in a strongly reflecting environment may also result faulty measurements Measurement of strongly reflecting surfaces may deliver faulty results Measurement performed through transparent optical media for
40. ut Alarm Analog output 4 20 mA O ALARM of latest valid Outputs current of last valid measurement measurement 1 Positive alarm hysteresis LOW RE gt RB Current 3 mA Negative alarm hysteresis HIGH RE lt RB Current 21 mA 2 Positive alarm hysteresis HIGH RE gt RB Current 21 mA Negative alarm hysteresis LOW RE lt RB Current 3 mA 8 14 AC display set ALARM center AC sets the beginning of the distance range for which the switching output will be turned active The length of this active range can be set using the AW parameter ASTECH GmbH Parameters and Control via RS232 LDM41PN and LDM42PN Manual AC must be selected in keeping with the currently set SF scale factor see 9 4 Digital Switching Output Alarm 8 15 AH display set ALARM hysterese AH allows you to make parameter settings for the switching hysteresis at the beginning and the end point of the active range of the switching output AH must be selected so it is properly matched to the currently valid scale factor SF The mathematical sign of AH can be used to set an active state logic level Positive sign active range is HIGH active u u Negative sign active range is LOW active No sign setting means positively signed see 9 4 Digital Switching Output Alarm 8 16 AW display set ALARM width AW pa ets the length of the active range beginning at AC AW settings must be made in agreement with the currently v
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