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ASTECH LDS10A User Manual

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LDS10A
Version 1.0

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Summary of Contents for ASTECH LDS10A

  • Page 1 Manual LDS10A Version 1.0...
  • Page 2 Dear User, You are advised to carefully read this User Manual before powering on the LDS10A 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

    LDS10A Manual Content Content General .................... 7 Safety Instructions ................7 General Safety Instructions ............. 7 Intended & Conforming Use ............ 7 Nonconforming use ..............8 LED Classification ..............9 Electric Supply ................. 9 Important Operating Advice ............ 9 Technical Data ................10 Mechanical Mounting Conditions ..........

  • Page 4: Content

    Content LDS10A Manual Read/Write parameters ............27 MODBUS RTU – Register addressing ........32 Part Numbers ................. 34 EG Declaration of Conformity ............35 Page 4 ASTECH GmbH...
  • Page 5 List of Figures Figure 1 : Dimensional drawing ............. 11 Figure 2 : LDS10A connector pin assignments ........12 Figure 3 : Wiring diagram of analog output .......... 14 Figure 4 : Output current and parameter of QA ........15 Figure 5 : Digital switching output ............
  • Page 6 Table 5 : Examples for resulting measurement rate ......23 Table 6 : Status byte information ............25 Table 7 : Factory settings of the LDS10A ..........25 Table 8 : Teach byte description ............26 Table 9 : List of Modbus register addresses .......... 32 Table 10 : Part Numbers ................

  • Page 7: General

    LDS10A Manual General General The LDS10A 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 8: Nonconforming Use

     Application of specified signal levels to the appropriate data lines Nonconforming use  Do not operate the LDS10A in any other way than described under "Intended & Conforming Use" above and only in a proper working condition  Safety devices must not be defeated or otherwise rendered ineffective ...

  • Page 9: Led Classification

    The sensor can be used without any additional safety protection. Electric Supply Use only 10 V to 30 V (direct voltage) for LDS10A 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 10: Technical Data

    Technical Data LDS10A Manual Technical Data Table 1 : Technical Data Sensing range Onto natural target (20 %) 0.1 m … 10 m Onto target board (90%) 0.1 m … 40 m  50 mm Accuracy Repeatability ± 5 mm...

  • Page 11: Mechanical Mounting Conditions

    LDS10A Manual Mechanical Mounting Conditions Mechanical Mounting Conditions The casing consists of rugged, corrosion-resistant, casted aluminum with powder coating. It provides 2 through holes for base plate mounting. Figure 1 : Dimensional drawing The zero-point has been introduced for constructional design reasons. It is located appr.

  • Page 12: Electrical Connection

    8 pins. This connector type guarantees optimized screening and a high IP degree. The connection provides IP67 protection in connected state. Compatible cable jacks and interface cables with different length are available (standard 5 m). Figure 2 : LDS10A connector pin assignments Page 12 ASTECH GmbH...

  • Page 13: Table 2 : Pin Assignment Connector And Interface Cable

    Caution: If input signals are applied to an output port, this may damage the LDS10A! Do not connect the current output QA to the power supply. This will destroy the interface board! All outputs are protected against steady short-circuit currents.

  • Page 14: Rs485 Connection

    Electrical Connection LDS10A Manual RS485 connection The serial data interface of the LDS10A works according to the RS485-standard (EIA-485) with two data lines with inverse polarity. It provides fieldbus capabilities with multiple access and device identification by address. The used protocol is Modbus RTU with binary data transmission. The...

  • Page 15: Figure 4 : Output Current And Parameter Of Qa

    LDS10A Manual Electrical Connection The current is proportional to the measured target distance. This applies within a distance interval that is marked by the two limiting parameters QA_LOW and QA_HIGH, where QA_HIGH may be greater or smaller than QA_LOW. The output current value for 4 mA … 20 mA output is calculated according to this equation: Distance −...

  • Page 16: Digital Switching Outputs Q1 And Q2

    Electrical Connection LDS10A Manual Digital switching outputs Q1 and Q2 With the help of a user-selectable distance threshold, the switching outputs Q1 and Q2 can be set to monitor objects or conditions for positive or negative overstep. Using the digital switching outputs, objects can be monitored for excision of a threshold value.

  • Page 17: Device Leds

    Q1_OFF = 9000 Q1_HYST = 200 Q1_NONC = 0 Device LEDs There are two multi-color LEDs on the front side of the LDS10A. They are supposed to signalize the current status without any connected data interface. Output Status Figure 6 : Device LEDs Meanings of the LED-colors are shown in Table 3 and Table 4.

  • Page 18: Table 3 : Meaning Of Status-Led Signals

    Electrical Connection LDS10A Manual Table 3 : Meaning of Status-LED signals Signal Meaning Green, blinking Target reflectivity barely sufficient Green Target reflectivity ok Red, blinking Temperature warning, temperature 4 Kelvin before end of range Temperature range exceeded Blue, blinking Target reflectivity not sufficient...

  • Page 19: Start-Up And Measurement Principle

    Version 2.17 or higher. Figure 7 : Program ProsoftP1 As part of preparative actions, the LDS10A 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 homogeneous, bright surface.

  • Page 20: Measurement Principle

    Start-up and measurement principle LDS10A Manual Measurement principle The measurement principle of the LDS10A consists of a number of separate data acquisition and processing algorithms. Signal Acquisition The signal acquisition module samples the signal of the photodiode element using a patented oversampling and accumulation strategy to maximize the signal resolution and the signal to noise ratio.
  • Page 21 Start-up and measurement principle Saturation Compensation The algorithm classifies the detected pulses based on their shape. The LDS10A determines which pulses are saturated and which have a normal shape. Saturated pulse occurs when the signal backscattered by the object is so strong that the full-waveform signal is clipped.

  • Page 22: Measurement Rate

    Start-up and measurement principle LDS10A Manual Measurement rate The sensor acquires a base input waveform at a rate of 72131 Hz (44MHz/610). Multiple acquisitions are used to perform accumulations and oversampling and generate a final waveform, which is processed afterwards to detect the presence of objects and measure their position.

  • Page 23: Table 5 : Examples For Resulting Measurement Rate

    LDS10A Manual Start-up and measurement principle The configuration software ProsoftP1 automatically calculates the most suitable combination of accumulations and oversampling according to the selected measurement rate. Table 5 : Examples for resulting measurement rate Accumulation Oversampling Measurement rate (Hz) 4096 2.20...

  • Page 24: Modbus-Parameter

    Read-only parameters are not allowed to be changed by the user. R/W parameters are used to change the device setup. Write-only parameters trigger just internal actions inside the LDS10A. There are not transmitted data. See chapter 7.5 for the Modbus address references.

  • Page 25: Write-Only Parameters

    Not used Bit 7 Not used Write-only parameters  Restore factory settings: If this parameter is triggered the LDS10A is set back to factory settings. The setup is stored immediately. Table 7 : Factory settings of the LDS10A ACCUMULATIONEXPO 4096 OVERSAMPLING...

  • Page 26: Table 8 : Teach Byte Description

    MODBUS-Parameter LDS10A Manual Q1_HYST Q1_NONC Q2_ON Q2_OFF 5000 Q2_HYST Q2_NONC OFFSET  Teach: This parameter triggers the automatic teach of the threshold values for Q1 and Q2. Table 8 : Teach byte description Bit 0 Set Q1_ON Bit 1 Set Q1_OFF...

  • Page 27: Read/Write Parameters

    LDS10A Manual MODBUS-Parameter Read/Write parameters  Slave Address Reads / Writes the slave address of the LDS10A for RS485 mode with multiple bus access  Accumulation Exponent The Accumulation Exponent is an important parameter for the measurement quality. It controls the number of measurements taken to generate on distance value.
  • Page 28 MODBUS-Parameter LDS10A Manual  Smoothing The behavior of the smoothing algorithm can be adjusted in 32 steps. Higher values enhance the sensor precision, but reduce the sensor reactivity. The smoothing algorithm can be deactivated. Data Format: Decimal number Range: -16 … +16; -17 = off The PC parameterization software ProsoftP1 shifts the data range of the smoothing function to 1 …...

  • Page 29: Figure 8 : Example For Parameter Offset

     Offset The offset enables the user to set the zero point for the distance measurement to a specific point outside the LDS10A. This is helpful for direct measurements of lengths or deviations starting in front or behind the LDS10A.
  • Page 30 MODBUS-Parameter LDS10A Manual  Qx_ON Qx_ON sets the distance value where the switching outputs change their logical state from 0 to 1. Data Format: Decimal number Range: -65535 … +65536  Qx_OFF Qx_OFF sets the distance value where the switching outputs change their logical state from 1 to 0.
  • Page 31 LDS10A Manual MODBUS-Parameter  QA_HIGH QA_HIGH selects the end distance for the analogue output range. Data Format: Decimal number Range: -65535 … +65335  QA_KBYTE QA_KBYTE selects the operating mode of the analog current output Data Format: Decimal number Range: 1 = 0…20 mA / 0…10 V; 2 = 4…20 mA...

  • Page 32: Modbus Rtu - Register Addressing

    Notice LDS10A Manual MODBUS RTU – Register addressing Table 9 : List of Modbus register addresses Register-Address Description Version Sub-Version Device serial number Slave address Internal temperature Maximum temperature Minimum temperature Factory settings Device type ID Level of target reflectivity...
  • Page 33 LDS10A Manual Notice Q2_ON MSW Q2_ON LSW Q2_OFF MSW Q2_OFF LSW Q2_HYST Q2_NONC QA_LOW MSW QA_LOW LSW QA_HIGH MSW QA_HIGH LSW Offset MSW Offset LSW ASTECH GmbH Page 33...

  • Page 34: Part Numbers

    Connection cable M12F8A-open, 10 m 15-0044-20 Connection cable M12F8A-open, 20 m 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° 11-0001-02 USB-RS485 interface converter for LDS10A Page 34 ASTECH GmbH...

  • Page 35: 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 36 Notice LDS10A Manual Page 36 ASTECH GmbH...

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