ASTECH LDM41P Manual
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ASTECH LDM41P Manual

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Manual
LDM41P and LDM42P
Version 3.5

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Summary of Contents for ASTECH LDM41P

  • Page 1 Manual LDM41P and LDM42P Version 3.5...
  • Page 2 Dear User, You are advised to carefully read this User Manual before powering on the LDM41P and LDM42P 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 acquisition provides.

  • Page 3: Table Of Contents

    LDM41P and LDM42P Manual Content Content General ....................... 6 Safety Instructions ..................8 General Safety Instructions ............... 8 Intended & Conforming Use ............. 8 Nonconforming use ................8 Laser Classification ................9 Electric Supply ................. 10 Important Operating Advice ............10 Technical Data ..................
  • Page 4 Content LDM41P and LDM42P Manual 8.12 SF – display/set scale factor ............28 8.13 SE – display/set error mode [0/1/2] ..........29 8.14 AC – display set ALARM center ............29 8.15 AH – display/set ALARM hysterese ..........30 8.16 AW –...

  • Page 5: Content

    Table 6 : Pin assignment programming cable ........... 18 Table 7 : Input voltages..................19 Table 8 : Output voltages .................. 19 Table 9 : Command list LDM41P and LDM42P ..........23 Table 10 : Output format .................. 26 Table 11 : Examples of scale factor ..............29 Table 12 : Meaning of SE ..................

  • Page 6: General

    LDM41P and LDM42P Manual General The LDM41P AND LDM42P 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.
  • Page 7 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 (LDM41P-h and LDM42P-h) e.g. 3M, self adhesive foil white non glossy or foil 3290 for longer distances ASTECH GmbH...

  • Page 8: Safety Instructions

    Compliance with all specified operating conditions is necessary. Failure to observe advisory notes or nonconforming product usage may cause physical injury to the user or material damage to the LDM41P and LDM42P. Cable connectors must not be plugged or unplugged under voltage.

  • Page 9: Laser Classification

    Rapidly changing measuring conditions are likely to falsify the result of measurement Laser Classification The LDM41P and LDM42P is a Class 2 laser product, ≤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.

  • Page 10: Electric Supply

    The sensor can use without any additional safety protection. Electric Supply Use only 10 V to 30 V DC (direct voltage) for LDM41P and LDM42P 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.

  • Page 11: Technical Data

    +15 up to +30 °C dependent on target reflectance, stray light influences and atmospheric conditions Please use only 24V DC For devices with heating (LDM41P-h and LDM42P-h) The heater is connected directly to the power supply. ASTECH GmbH...
  • Page 12 IP 65 (spatter water and dust protection) trigger function is not available for devices with internal heating (LDM41P-h and LDM42P-h) 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...

  • Page 13: Mounting

    Mounting The casing consists of a rugged, corrosion-resistant extruded aluminum 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 LDM41P and LDM42P. Figure 3 : Mounting drawing To protect the range finder’s optical surfaces from dust, physical contact and...

  • Page 14: Figure 4 : Offset Against Zero-Edge

    (standard 2 m, optionally 5 or 10 m). Figure 4 : Offset against zero-edge The LDM41P and LDM42P’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.

  • Page 15: Electrical Connection

    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 : LDM41P and LDM42P terminals Quantity Connector Type 4-pin male cable connector...

  • Page 16: Assignment Of Terminals

    Trigger input 3 to 24 V (ground potential GND) Profibus DP The LDM41P and LDM42P has two terminals (input and output) for circular plug-in connectors (series 715 B for Profibus DP from Binder) conforming to the relevant standards. Table 4 : Pin assignment Profibus DP...

  • Page 17: Programming Cable

    Programming Cable Connection to a PC requires the following cable with SUB-D 9 F connectors. The TxD and RxD signals of the LDM41P and LDM42P and the PC connection are crossed. The colours apply to the optional programming cable. ASTECH GmbH...

  • Page 18: Shield And Grounding

    EMC problems (no correct measurement function or switching the gauge off or on is necessary). If no potential equalization is possible, then mount the LDM41P and LDM42P isolated from the carrier base (use nylon screws and washers). Connect the screen with mass to the cable end.

  • Page 19: Limiting Values For Voltages

     VCC – 2 V Alarm Level depending on VCC Limiting values of voltages, loads and logical levels comply with relevant RS232 and Profibus standards. Trigger function is not available for devices with internal heating (LDM41P-h and LDM42P-h) ASTECH GmbH Page 19...

  • Page 20: Start Up

    We recommend the use of the following programme: LDMTOOL (Version 4.5 or higher). When turning on the LDM41P and LDM42P, it must be properly installed at the designated operation site, aimed at the target, and kept in a stable position.

  • Page 21: Parameters And Control Via Rs232

    Parameters and Control via RS232 Parameters and Control via RS232 General It is easy to configure the LDM41P and LDM42P by using a PC, as it provides a wide range of operating functions. Configuration should take place prior to connecting to the Profibus.
  • Page 22 LDM41P and LDM42P Manual Prior to commencing measurements, desired parameter settings can be entered via a smart selection procedure, so as to adapt the LDM41P and LDM42P in an optimal manner to specific environments and measuring tasks. Such settings will be stored when turning off the LDM41P and LDM42P.

  • Page 23: Table 9 : Command List Ldm41P And Ldm42P

    Turns Laser off Displays all parameter values Resets all parameters to standard values (don't use) Trigger function is not available for devices with internal heating (LDM41P-h and LDM42P-h) Only for devices with internal heating (LDM41P-h and LDM42P-h) ASTECH GmbH Page 23...

  • Page 24: Dt - Distance Tracking

    DT mode can be chosen for distance measurement of different kinds of surfaces (varying reflectance). In this type of distance tracking mode, the LDM41P and LDM42P 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.

  • Page 25: Dx - Distance Tracking With Target Board (50 Hz)

    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 LDM41P and LDM42P will send data and switches to digital and/or analog output.

  • Page 26: Dm - Distance Measurement

    DM mode triggers a single measurement (single shot) TP – internal temperature [°C] TP queries the value of the inner LDM41P and LDM42P temperature. Note: In tracking mode, the inner temperature may exceed the surrounding temperature level by as much as 10 K.

  • Page 27: St - Display/Set Measure Time [0

    Measuring time is directly conditional on the selected measuring mode. As a general rule, one may say: the poorer the reflectance of the surface of a particular target, the more time the LDM41P and LDM42P 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.

  • Page 28: Sf - Display/Set Scale Factor

    An exception there from is zero-value. In this case, the LDM41P and LDM42P automatically picks the smallest possible time value for measurement! The LDM41P and LDM42P comes factory-set with ST = 0.

  • Page 29: Se - Display/Set Error Mode [0/1/2]

    SE (error mode) allows you to configure the behavior of the digital switching output (alarm) and/or the analog output following an error message (E15, E16, E17). Depending on the particular LDM41P and LDM42P application environment, error messages have to be handled in different ways.

  • Page 30: Ah - Display/Set Alarm Hysterese

    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. Only for devices with internal heating (LDM41P-h and LDM42P-h) Page 30 ASTECH GmbH...

  • Page 31: Hf - Display/Set Temperature For Heating Off

    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 Trigger function is not available for devices with internal heating (LDM41P-h and LDM42P-h) ASTECH GmbH...

  • Page 32: As - Display/Set Autostart Command

    LO turns the Laser on. This function can be used for orientation or functional testing of the LDM41P and LDM42P. 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.

  • Page 33: Pa - Display Settings

    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 LDM41P and LDM42P is necessary average value[SA]....1 display format[SD]....d measure time[ST]....0 scale factor[SF]....1...

  • Page 34: Interface Connection

    Profibus DP General The LDM41P and LDM42P is operated as a standard Profibus slave. It becomes operational with master 13 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.

  • Page 35: Table 13 : Meaning Of Profibus Dp Modes

    LDM41P and LDM42P Manual Interface Connection Table 13 : Meaning of Profibus DP modes Modes Profibus IN Profibus Profibus Configuratio Configuration Bytes Standa 8 bit Error Counter 13 byte IN 156 32 0 8 bit Error Code 1 byte OUT...

  • Page 36: Serial Interface Rs232

    To turn off the Laser and switch the LDM41P and LDM42P 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 LDM41P and LDM42P will operate in the DT mode (Distance Tracking, continuous measurement).

  • Page 37: Output Format Ethernet And Rs232

    LDM41P and LDM42P Manual Interface Connection The commands of the serial interface are described in chapter 8 starting page 21. The data output format is determined by parameter SD (display format), see page 26. Output Format Ethernet and RS232 The output format on the serial interface is selected by the command SD.

  • Page 38: Digital Switching Output (Alarm)

    Interface Connection LDM41P and LDM42P Manual dec+sig: 049.960_000005<CR><LF> Error case dec/hex: E15<CR><LF> (see page 42, chapter 11, Error Codes RS232 and Profibus) 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.
  • Page 39 LDM41P and LDM42P Manual Interface Connection In the case of a negative AH, the output switching pattern will be inverse. Figure 8 : Digital switching output behavior with positive and negative hysteresis 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.

  • Page 40: Trigger Input

    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 LDM41P and LDM42P has to be switched to trigger mode (see 8.6, DF – distance measurement with external trigger).

  • Page 41: List Of Commands

    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) Only for devices with internal heating (LDM41P-h and LDM42P-h) ASTECH GmbH Page 41...

  • Page 42: Error Codes Rs232 And Profibus

    Error Codes RS232 and Profibus LDM41P and LDM42P Manual Error Codes RS232 and Profibus Table 16 : Error codes Code Description Action Reflexes are too weak, or distance Use white target board from LDM (front edge) to target is increase distance to target less than 0.1 m...

  • Page 43: Gsd Data

    LDM41P and LDM42P Manual GSD Data GSD Data ;========================================================== ; Profibus Device ASTECH Unigate for LDM4xA and LDM4xP ; Model : LDM 4x Series ; Description : LDM 4x Series with Profibus-DP ; Language : English ; Date : 6 September 2005 ;...
  • Page 44 GSD Data LDM41P and LDM42P Manual Bitmap_Device "LDM4xP_" ; Supported DP features Freeze_Mode_supp Sync_Mode_supp Auto_Baud_supp Set_Slave_Add_supp ; Maximum polling frequency Min_Slave_Intervall ; 100 us ; Maximum supported sizes Modular_Station ; modular Max_Module Max_Input_Len = 244 Max_Output_Len = 244 Max_Data_Len = 432...

  • Page 45: Contact Assignment For Cable Connectors

    LDM41P and LDM42P Manual Contact Assignment for Cable Connectors Contact Assignment for Cable Connectors Numbers are displayed when looking at the terminal side. RS232 Power supply and Trigger 5-pin male cable connector 5-pin female cable connector Profibus Output Profibus Input...

  • Page 46: Eg Declaration Of Conformity

    EG Declaration of Conformity 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...

  • Page 47: Part Numbers

    12-2015-00 Protection tube for pressure air for LDM4x-Serie 11-0006-00 ASTECH USB Stick (Documentation and Software) 16-2001-01 Printed Manual LDM41P and LDM42P, A5, DE 16-2001-02 Printed Manual LDM41P and LDM42P, A5, EN 17-2000-00 License number for PC-Software LDMTOOL for LDM3x und...
  • Page 48 Part Numbers LDM41P and LDM42P Manual 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 48 ASTECH GmbH...
  • Page 49 LDM41P and LDM42P Manual Notice ASTECH GmbH Page 49...
  • Page 50 Notice LDM41P and LDM42P Manual Page 50 ASTECH GmbH...

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