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ASTECH LDS11A Manual

Led distance sensor
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LDS11A
Version 0.1

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Summary of Contents for ASTECH LDS11A

  • Page 1 Manual LDS11A Version 0.1...

  • Page 2: Revisions History

    Dear User, You are advised to carefully read this User Manual before powering on the LDS11A LED distance 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

    LDS11A Manual Content Content General....................8 Safety Instructions ................. 8 General Safety Instructions ........... 8 Intended & Conforming Use ..........8 Nonconforming use .............. 9 LED Classification ..............9 Electric Supply ..............10 Important Operating Advice ..........10 Technical Data ..................11 Mechanical Mounting Conditions ............

  • Page 4: Content

    Content LDS11A Manual MM - display/set measurement mode [1, 2, 5, 6] ....24 MX - display/set dual frequency measurement mode [1, 4, 8] SA – display/set average value [1…20] ........ 24 SD – display/set display format [d/h/s}] ......25 8.10...
  • Page 5 Output Format on the serial interface......... 35 Digital Switching Output (Alarm) ........36 Analog Output ..............38 Trigger Input ............... 39 List of Commands ................41 Error Codes ..................42 EG Declaration of Conformity ............... 43 Part Numbers ..................44 ASTECH GmbH Page 5...
  • Page 6 LDS11A Manual List of Figures Figure 1 : Dimensional drawing ............12 Figure 2 : LDS11A connector pin assignments ........13 Figure 3 : Interface cable with connector ........... 14 Figure 4 : Interface cable color codes ..........14 Figure 5 : Isolated Mounting .............. 16 Figure 6 : Recommended termination for open RS-232 ......
  • Page 7 Table 8: Examples for Scale factor ............26 Table 9 : Meaning of SE ..............27 Table 10 : List of commands ............... 41 Table 11 : Error Codes ................ 42 Table 13 : Part Numbers ..............44 ASTECH GmbH Page 7...

  • Page 8: General

    General LDS11A Manual General The LDS11A is an industrial grade distance sensor using advanced measurement and detection capabilities based on patented signal processing algorithms. It provides different interfaces to transmit the detection results to post processing unit like PLCs in industrial applications.

  • Page 9: Nonconforming Use

    Safety devices must not be defeated or otherwise rendered ineffective ▪ Information and warning signs must not be removed ▪ Repair work on the LDS11A must not be carried out by anyone other than authorized personnel. ▪ Avoid using the LDS11A without certified protection in an explosive environment ▪...

  • Page 10: Electric Supply

    Safety Instructions LDS11A Manual Electric Supply Use only 10 V to 30 V (direct voltage) for LDS11A 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

    LDS11A Manual Technical Data Technical Data Table 1 : Technical Data Measuring range Onto natural target (20 % reflection) 0.1 m … 10 m Onto target board (90% 0.1 m … 30 m reflection) Measuring uncertainty 1) 2) Onto natural target (18 % reflection ±...

  • Page 12: Mechanical Mounting Conditions

    Mechanical Mounting Conditions LDS11A Manual Mechanical Mounting Conditions Figure 1 : Dimensional drawing The casing consists of rugged, corrosion-resistant, casted aluminum with powder coating. It provides 2 through holes for base plate mounting. The zero-point has been introduced for constructional design reasons. It is located on the left side of the housing and can be compensated with the help of parameter OF (offset).
  • Page 13 LDS11A Manual Electrical Connection TRIG RS232 Figure 2 : LDS11A connector pin assignments Table 2 : Pin assignment connector and interface cable Color Assignment Function White Digital output Brown Power supply Green RS232, receive line Yellow RS232, transmit line Grey...

  • Page 14: Interface Cable

    Electrical Connection LDS11A Manual All outputs are protected against steady short-circuit currents. Caution: The cable end is exposed! The user is responsible to take precautions that will prevent any kind of shorts! The cable shield has to be connecting to earth with low resistance.

  • Page 15: Shield And Grounding

    EMC problems (no correct measurement function or required power reset of the gauge). • If no potential equalization is possible, mount the LDS11A isolated (3) from the carrier base (use Nylon screws and washers). • Use screened cable, e.g. “10XAWG224CULSW“, remember to extend also the cable screen (1).

  • Page 16: Termination Of Rs232

    Please keep the EIA standard. The maximal cable length of the RS232 cable is 15 m. Device LEDs There are two multi-color LEDs on the side of the LDS11A. They are supposed to signalize the current status without any connected data interface. Page 16...
  • Page 17 LDS11A Manual Electrical Connection Figure 7 : Device LEDs Meanings of the LED-colors are shown in and . Table 3 : Meaning of Status-LED signals Signal Meaning Green Device is powered up Red, blinking Internal error Table 4 : Meaning of Output-LED signals...

  • Page 18: Limiting Values For Voltages

    LDS11A Manual Limiting Values for Voltages Input voltages: Table 5 : Input voltages Terminal point Voltage Comment 30 V Pole-reversal-protected ±13.2 V Short-circuit-proof ±25 V Short-circuit-proof TRIG 30 V Short-circuit-proof Output voltages: Table 6 : Output voltages Terminal point Voltage Comment ±5.4 V...

  • Page 19: Start Up

    LDS11A Manual Start up Start up Make sure that all cable ends are protected against short circuit effects before you turn on power supply! 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 RS232 data interface and a terminal program are required.
  • Page 20 Start up LDS11A Manual As part of preparative actions, the LDS11A has to be installed properly on the designated working site, oriented onto the target and kept in a stable position. The target to be measured should preferentially have a homogeneous, bright surface.

  • Page 21: Commands And Parameter

    Commands and Parameter General The LDS11A can be parameterized very easy with the PC. The PC must be equipped with a serial interface RS232 according to the attached LDS11A. The use of USB to serially converters is also possible. On the PC a terminal program must be installed (LDMTOOL or HyperTerminal).
  • Page 22 Commands and Parameter LDS11A Manual All valid settings will be preserved on turning the LDS11A off! They can only be replaced with new value entries or changed back to their standard values by running an initialization routine. Command entries are not case-sensitive. This means that small and capital lettering can be used for commands.

  • Page 23: Dt - Distance Tracking

    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 LDS11A will send data and switches to digital and/or analog output.

  • Page 24: Tp - Internal Temperature [°C]

    Commands and Parameter LDS11A Manual TP – internal temperature [°C] TP queries the value of the inner LDS11A temperature. Note: In tracking mode, the inner temperature may exceed the surrounding temperature level by as much as 10 K. MM - display/set measurement mode [1, 2, 5, 6] The measurement mode controls the measurement range and the maximum measurement speed.

  • Page 25: Sd - Display/Set Display Format [D/H/S}]

    LDS11A Manual Commands and Parameter SD – display/set display format [d/h/s}] SD selects the output format of measured value data. There are three modes available: Table 7 : Output format Parameter Output Format decimal xxx.xxx<CR><LF> x=0…9 hexadecimal <SPACE>xxxxxx<CR><LF> x=0...F decimal with signal xxx.xxx<SPACE>yyyyyy<CR><LF>...

  • Page 26: St - Display/Set Measure Time [10

    As a general rule, the poorer the reflectivity of the surface of a particular target, the more time the LDS11A will need to determine the distance with the specified accuracy. For example, if an error message E15 appears due to poor reflectivity and insufficient measurement time, the latter setting must be increased.

  • Page 27: 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 LDS11A application environment, error messages have to be handled in different ways.

  • Page 28: Ah - Display/Set Alarm Hysteresis

    Commands and Parameter LDS11A Manual 8.14 AH – display/set ALARM hysteresis 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).

  • Page 29: Re - Display/Set Distance Of I = 20 Ma

    LDS11A Manual Commands and Parameter 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 9.4) In the event of a fault, the output value will correspond to the current that was set via parameter SE.

  • Page 30: Tdx Y - Display/Set Trigger Delay Trigger Level

    Commands and Parameter LDS11A Manual stands for the number of values that are out of the permissible value range (out of tolerance values). In the event of out-of-tolerance values arriving in succession, the most recently corrected value will be included in the correction process for the next out-of-tolerance value.

  • Page 31: Tmx Y - Display/Set Trigger Mode Trigger Level

    LDS11A Manual Commands and Parameter 8.22 TMx y – display/set trigger mode trigger level TM provides parameter setting options for the auto-start trigger function which allows external triggering of the auto-start command that was set via parameter AS. Triggering is accomplished via the external trigger input. All starting modes which are selectable via AS can be launched and stopped by external triggering.

  • Page 32: Br - Display/Set Baud Rate [2400

    Possible entries are those delivering a measured value to the outputs, an ID command or the command for turning the Laser on (LO). For example, if ASDT has been parameterized, the LDS11A will begin with distance tracking on turning on power.

  • Page 33: So - Set Current Distance To Offset

    LO turns the Laser on. This function can be used for orientation or functional testing of the LDS11A. 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 8.28 LF –...

  • Page 34: Dr - Device Reset (Sensor Restart)

    LDS11A Manual autostart command[AS].....dt distance offset[OF]....0 8.31 DR – Device reset (sensor restart) DR executes a cold start of the LDS11A and practically simulates a voltage interruption. This command is useful when the autostart command has been changed. Interface Connection...

  • Page 35: Output Format On The Serial Interface

    LDS11A Manual Interface Connection Output Format on the serial interface The output format on the serial interface is selected by the command SD. There are three modes available: Parameter Output Format decimal xxx.xxx<CR><LF> x=0…9 hexadecimal <SPACE>xxxxxx<CR><LF> x=0...F Decimal with signal xxx.xxx<SPACE>yyyyyy<CR><LF>...

  • Page 36: Digital Switching Output (Alarm)

    Interface Connection LDS11A Manual 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. Figure 13 : Wiring diagram of digital switching output For example, using the digital switching output, an object which was selected for measurement can be monitored for excision of a threshold value.
  • Page 37 LDS11A Manual Interface Connection Figure 14 : Digital switching output behavior 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 AH0.2 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“...

  • Page 38: Analog Output

    Interface Connection LDS11A Manual Analog Output The purpose of the analog output is to allow transmission of analog measured values via a 4…20mA interface. Figure 15 : Wiring diagram of analog output The current is proportional to the measured target distance. This applies within a distance interval that is marked by the two limiting parameters “Range Begin“...

  • Page 39: Trigger Input

    LDS11A Manual Interface Connection Figure 16 :Output current diagram for RE > RB and RE < RB To match analog output behavior in the event of an error message (E15, E16, E17, E18), appropriate settings can be made under “SE“ (see 8.12)
  • Page 40 Interface Connection LDS11A Manual Having done this, the LDS11A has to be switched to trigger mode (see 8.3, DF – distance measurement with external trigger). Page 40 ASTECH GmbH...

  • Page 41: List Of Commands

    LDS11A Manual List of Commands Table 10 : List of commands Command Description Starts distance tracking Starts remote-triggered single distance measurement (single shot) Starts single distance measurement (single shot) Queries inner temperature Queries / sets measurement mode (1, 2, 5, 6) Queries / sets dual frequency measurement mode (1, 4, 8) Queries / sets floating average value (1...20)

  • Page 42: Error Codes

    Error Codes LDS11A Manual Error Codes Table 11 : Error Codes Code Description Action Reflexes are too weak, or distance from Use white target board LDM (front edge) to target is less than increase distance to target 0.1 m Reflexes are too strong Use white target board or filter Too much steady light (e.g.

  • Page 43: 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 LED Distance Sensor...

  • Page 44: Part Numbers

    Part Numbers LDS11A Manual Part Numbers Table 12 : Part Numbers Part-No. Name 10-2058-00 LDS11A Sensor 15-0048-05 Connection cable M12F8A-open, 5 m, 90° 15-0048-10 Connection cable M12F8A-open, 10 m, 90° 15-0048-20 Connection cable M12F8A-open, 20 m, 90° Page 44 ASTECH GmbH...
  • Page 45 LDS11A Manual Part Numbers ASTECH GmbH Page 45...

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