ASTECH LDS10A User manual

Manual
LDS10A
Version 1.0

LDS10A Manual
Page 2 ASTECH GmbH
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.
This technology is subject to continuously ongoing development.
Editorial deadline: May 2018
Firmware version: ≥1.0
Manual version: V 1.1
File: Manual_LDS10A_EN_V1.1.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
01.02.2018
First release
1.1
01.05.2018
First update
ASTECH GmbH, Schonenfahrerstr. 5, 18057 Rostock, Germany
Internet www.astech.de E-Mail [email protected]
Phone +49 (0)381 / 44073-0 Fax +49 (0)381 / 44073-20

LDS10A Manual Content
ASTECH GmbH Page 3
I. Content
1 General ............................................................................................ 7
2 Safety Instructions........................................................................... 7
2.1 General Safety Instructions .....................................................7
2.2 Intended & Conforming Use....................................................7
2.3 Nonconforming use .................................................................8
2.4 LED Classification.....................................................................9
2.5 Electric Supply ......................................................................... 9
2.6 Important Operating Advice....................................................9
3 Technical Data ............................................................................... 10
4 Mechanical Mounting Conditions .................................................11
5 Electrical Connection.....................................................................12
5.1 Connector Terminal............................................................... 12
5.2 RS485 connection..................................................................14
5.3 Analog current output...........................................................14
5.4 Digital switching outputs Q1 and Q2.....................................16
5.5 Device LEDs............................................................................17
6 Start-up and measurement principle ............................................19
6.1 Start up ..................................................................................19
6.2 Measurement principle .........................................................20
6.3 Measurement rate.................................................................22
7 MODBUS-Parameter......................................................................24
7.1 General ..................................................................................24
7.2 Read-only parameters ...........................................................24
7.3 Write-only parameters ..........................................................25

Content LDS10A Manual
Page 4 ASTECH GmbH
7.4 Read/Write parameters.........................................................27
7.5 MODBUS RTU –Register addressing .....................................32
8 Part Numbers.................................................................................34
9 EG Declaration of Conformity........................................................35

LDS10A Manual Content
ASTECH GmbH Page 5
II. 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.........................................................16
Figure 6 : Device LEDs............................................................................17
Figure 7 : Program ProsoftP1 ................................................................19
Figure 8 : Example for parameter OFFSET.............................................29

Content LDS10A Manual
Page 6 ASTECH GmbH
III. List of Tables
Table 1 : Technical Data.........................................................................10
Table 2 : Pin assignment connector and interface cable.......................13
Table 3 : Meaning of Status-LED signals................................................18
Table 4 : Meaning of Output-LED signals ..............................................18
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........................................................................34

LDS10A Manual General
ASTECH GmbH Page 7
1General
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.
The implemented sensing technology is based on infrared LED illumination
and the time-of-flight of light principle. The LED emitters illuminate the area of
interest (pulsed at high frequency) and the single channel sensor receiver
collects the backscatter of the emitted light and measures the time taken for
the emitted light to return back to the sensor. A single photodetector is used
and provides a full-beam sensing module. Oversampling and accumulation
techniques are used to provide extended resolution and range.
2Safety Instructions
2.1 General Safety Instructions
These safety and operating instructions should be carefully read and followed
during practical work with the LDS10A.
There is danger of electrical shock. For necessary repair work, the
LDS10A may not be opened by anyone other than authorized
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 product usage may cause
physical injury to the user or material damage to the LDA10A.
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 & Conforming Use
Measurement of distances
Special measuring functions

Safety Instructions LDS10A Manual
Page 8 ASTECH GmbH
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 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
Information and warning signs must not be removed
Repair work on the LDS10A must not be carried out by anyone
other than authorized personnel.
Avoid using the LDS10A without certified protection in an explosive
environment
Measurement with the LDS10A 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
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

LDS10A Manual Safety Instructions
ASTECH GmbH Page 9
2.4 LED Classification
The LDS10A meets the requirements of the “Exempt lamp class” of IEC
62471:2006.
The sensor can be used without any additional safety protection.
2.5 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.
2.6 Important Operating Advice
To make full use of the systems inherent performance capabilities and achieve
a long service life, you should always follow these operating rules:
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 LDS10A
Prevent the LDS10A from overheating.
Prevent the LDS10A from major temperature variances during
operation
In accordance with IP67 internal protection standards, the LDS10A
is designed to be splash proof and dustproof.
Read these safety and operating instructions with care and follow
them in practical use.

Technical Data LDS10A Manual
Page 10 ASTECH GmbH
3Technical Data
Table 1 : Technical Data
Sensing range1)
Onto natural target (20 %)
Onto target board (90%)
0.1 m … 10 m
0.1 m … 40 m
Accuracy2)
50 mm
Repeatability
± 5 mm
Resolution
1 mm
Measuring frequency
2.2 Hz … 140 Hz
Lighting
Infrared-LED, 850 nm
Lighting classification
Exempt class IEC 62471:2006
Lighting beam divergence
3°
Receiver beam divergence
6°
Operating temperature
-25 °C up to +75 °C
Supply voltage
10 V … 30 V DC (protected against polarity
reversal)
Power consumption
< 3 W
Serial data interface
RS485, MODBUS RTU, 19.400 Baud
Digital output
2x PNP, NO/NC selectable
Analogue output
0/4 mA ... 20 mA current output,
Adjustable range limits, 10 bit
Load impedance of analogue
Output
< 500 Ωat VCC = 24V, < 150 Ω at VCC = 12 V
Status indicator
2x RGB-LED on top cover
Connector
8 pin, M12-standard, male
Housing material
Aluminum, powder coated
Dimensions (L x W x H)
131 mm x 64 mm x 50 mm, incl. connector
Weight
280 g
Mounting
2 holes for M4 screws, 105 mm x 56 mm
Protection class
IP 67 (waterproof and dust protected)
EMC
IEC 61326-1
1) Dependent on target reflectance, surface structure, ambient light and atmospheric conditions
2) Single measurement, statistical spread 95 %