Siemens SIMATIC Vision Sensor VS 130-2 User manual

s
Preface, Contents
Product Overview 1
System Integration 2
Installation 3
Commissioning 4
Operator Input 5
Process Interface 6
Diagnostics 7
Appendix 8
Index
SIMATIC
Vision Sensor SIMATIC
VS 130-2/VS 130-2vcr
Manual
Edition 09/2005
A5E00475759-01

Siemens AG
Automation and Drives
Postfach 4848
90437 NÜRNBERG
GERMANY
Copyright © Siemens AG 2005
A5E00475759-01
Siemens AG 2005
Technical data subject to change.
Safety Guidelines
This manual contains notices you have to observe in order to ensure your personal safety, as well as to
prevent damage to property. The notices referring to your personal safety are highlighted in the manual
by a safety alert symbol, notices referring to property damage only have no safety alert symbol. The
notices shown below are graded according to the degree of danger.
!Danger
indicates that death or severe personal injury will result if proper precautions are not taken.
!Warning
indicates that death or severe personal injury may result if proper precautions are not taken.
!Caution
with a safety alert symbol indicates that minor personal injury can result if proper precautions are not
taken.
Caution
without a safety alert symbol indicates that property damage can result if proper precautions are not
taken.
Notice
indicates that an unintended result or situation can occur if the corresponding notice is not taken into
account.
If more than one degree of danger is present, the warning notice representing the highest degree of
danger will be used. A notice warning of injury to persons with a safety alert symbol may also include a
warning relating to property damage.
Qualified Personnel
The device/system may only be set up and used in conjunction with this documentation. Commissioning
and operation of a device/system may only be performed by qualified personnel. Within the context of
the safety notices in this documentation qualified persons are defined as persons who are authorized to
commission, ground and label devices, systems and circuits in accordance with established safety
practices and standards.
Prescribed Usage
Note the following:
!
Warning
This device and its components may only be used for the applications described in the catalog or the
technical description, and only in connection with devices or components from other manufacturers
which have been approved or recommended by Siemens.
Correct, reliable operation of the product requires proper transport, storage, positioning and assembly
as well as careful operation and maintenance.
Trademarks
All names identified by ® are registered trademarks of the Siemens AG.
The remaining trademarks in this publication may be trademarks whose use by third parties for their
own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and
software described. Since variance cannot be precluded entirely, we cannot guarantee full consistency.
However, the information in this publication is reviewed regularly and any necessary corrections are
included in subsequent editions.

Preface
Purpose of the Manual
This manual describes the vision sensors SIMATIC VS 130-2 and
VS 130-2vcr. It helps to install, commission and operate the sensors.
The documentation addresses personnel concerned with the engineering,
commissioning and service of automation systems and visualization equipment.
Guide
The manual contains the following guides which provide quick access to the
specific information you need:
• The manual opens with a complete directory.
• The manual closes with a detailed index for quick access to the information
you require.
Further information
An installation and wiring manual is included in paper form.
On your CD you will find the "Getting Started" guide for initial commissioning of
your SIMATIC VS 130-2 or VS 130-2vcr vision sensor.
Further support
If you have any questions concerning the use of products which are not answered
in this manual, please contact your local Siemens partner at your Siemens office.
You can find your local partner at:
http://www.siemens.com/automation/partner
You can find a guide to the technical documentation on offer for the individual
SIMATIC products and systems at:
http://www.siemens.de/simatic-tech-doku-portal
You can find the catalog and online ordering systems at:
http://mall.automation.siemens.com/
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Preface
Training center
To help you to learn about the vision sensors SIMATIC VS 130-2 and
VS 130-2vcr and the S7 automation system, we provide a range of training
courses. Please contact your regional training center or the central training center
in Nuremberg, Germany.
Telephone: [phone].
Internet: http://www.sitrain.com
Technical support
How to reach technical support for all A&D products
• With the Support Request form on the Web:
http://www.siemens.de/automation/support-request
• Telephone: + 49 180 5050 222
• Fax: + 49 180 5050 223
Further information about our technical support is available in the Internet at
http://www.siemens.com/automation/service
Service & Support on the Internet
The Siemens Service & Support team provides you with comprehensive additional
information on SIMATIC products in its online Internet services.
http://www.siemens.com/automation/service&support
There you can find:
• Current product information and downloads which you may find useful for your
product.
• The documents you require, using our Service & Support search engine.
• A forum where users and experts from all over the world exchange ideas
• Your local partner for Automation & Drives.
• Information about onsite services, repairs, spare parts. Lots more is available
to you on our "Service“ pages.
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Contents
1Product Overview 1-1
1.1 Product Description .......................................................................................... 1-1
1.2 Components ..................................................................................................... 1-4
1.3 Processing Configuration.................................................................................. 1-5
1.4 Important Requirements for Installation............................................................ 1-6
1.5 Applications ...................................................................................................... 1-6
1.6 The lamp multiplexer accessory ....................................................................... 1-9
1.7 Requirements for Codes and Legibility........................................................... 1-11
1.7.1 What is Required of Data Matrix and Vericodes? .......................................... 1-11
1.7.2 Requirements for QR codes ........................................................................... 1-15
1.7.3 Requirements for PDF417 codes ................................................................... 1-17
2System Integration 2-1
2.1 Design............................................................................................................... 2-1
2.2 Application Examples ....................................................................................... 2-2
2.2.1 Reading codes or checking quality in stand-alone mode
with output over Ethernet.................................................................................. 2-2
2.2.2 Reading Codes or Quality in Stand-alone Mode with Output over RS-232 ..... 2-3
2.2.3 Reading Codes or Quality in a PROFIBUS Environment................................. 2-4
2.2.4 Reading Codes or Quality in a PROFINET Environment ................................. 2-5
2.2.5 Reading codes or checking quality in a PROFINET environment
and outputting over Ethernet ............................................................................ 2-6
2.2.6 Mixed operation ................................................................................................ 2-6
3Installation 3-1
3.1 Installing Components for VS 130-2................................................................. 3-1
3.2 Wiring Components .......................................................................................... 3-3
3.3 Guidelines on Interference-Proof Installation ................................................... 3-5
3.4 Guidelines for Installing PROFIBUS DP or PROFINET I/O ............................. 3-5
4Commissioning 4-1
4.1 Introduction ....................................................................................................... 4-1
4.2 Turning on the Device....................................................................................... 4-1
4.3 Control and Display Panel ................................................................................ 4-3
4.4 Adjusting the Sensor with the Setup Support................................................... 4-5
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Contents
5Operator Input 5-1
5.1 Overview........................................................................................................... 5-1
5.2 Working with the Processing Unit..................................................................... 5-1
5.3 Working with the Setup Support ..................................................................... 5-26
5.3.1 Starting Setup Support in the Web Browser................................................... 5-28
5.3.2 User interface of the VS 130-2/VS 130-2vcr .................................................. 5-29
5.3.3 Adjust Sensor ................................................................................................. 5-31
5.3.4 Connections .................................................................................................... 5-34
5.3.5 Train................................................................................................................ 5-37
5.3.6 Evaluating ....................................................................................................... 5-39
5.3.7 Options............................................................................................................ 5-40
5.3.8 Info .................................................................................................................. 5-44
5.3.9 Maintain .......................................................................................................... 5-48
5.3.10 Stop.................................................................................................................5-48
5.4 Operator Control over Personal Digital Assistant (PDA) ................................ 5-49
5.4.1 Prerequisites................................................................................................... 5-49
5.4.2 Establishing a Connection between PDA and Processing Unit...................... 5-49
5.4.3 Starting or stopping setup support from the PDA........................................... 5-50
5.4.4 User interface of the PDA ............................................................................... 5-50
5.4.5 Known PDA problems..................................................................................... 5-54
6Process Interface 6-1
6.1 Introduction ....................................................................................................... 6-1
6.2 Integrating the DP slave VS 130-2 in HW Config............................................. 6-2
6.3 Integrating the PROFINET I/O Device VS 130-2 in HW Config ....................... 6-4
6.4 Control Via the "DI/DO" I/O Interface ............................................................... 6-6
6.4.1 Control Signals ................................................................................................. 6-6
6.4.2 Selecting the Mode ........................................................................................... 6-7
6.5 Control over PROFIBUS DP and PROFINET IO ........................................... 6-11
6.5.1 File Transfer Principle over PROFIBUS DP and PROFINET IO.................... 6-11
6.5.2 Assignments for PROFIBUS DP and PROFINET IO-relevant Interfaces
for the Processing Unit ................................................................................... 6-12
6.5.3 Sample program for data exchange if code length <= 27 bytes..................... 6-15
6.5.4 Programming the Data Block.......................................................................... 6-17
6.5.5 FB 79 "VS130-2_CONTROL"......................................................................... 6-19
6.6 Sample Programs ........................................................................................... 6-32
6.6.1 Sample Program for Interfacing the VS 130-2 to a SIMATIC Controller
with the Aid of FB79........................................................................................ 6-32
6.6.2 Sample Program for Outputting the Read Code to a PC or PG ..................... 6-33
6.6.3 Sample Program for Archiving Diagnostic Information on a PC or a PG ....... 6-34
7Diagnostics 7-1
7.1 Introduction ....................................................................................................... 7-1
7.2 Diagnostics with Messages .............................................................................. 7-1
7.2.1 Error Messages ................................................................................................ 7-2
7.2.2 Warnings/Notes ................................................................................................ 7-7
7.2.3 Read Results .................................................................................................. 7-10
7.3 Diagnostics Based on the "BF" LED............................................................... 7-11
7.3.1 "BF" LED with PROFIBUS DP........................................................................7-11
7.3.2 "BF" LED with PROFINET IO ......................................................................... 7-11
7.4 Slave Diagnostics or I/O Device Diagnostics ................................................. 7-12
7.4.1 Introduction ..................................................................................................... 7-12
7.4.2 Reading Out the Diagnostic Information with S7............................................ 7-12
7.4.3 Diagnostics for PROFIBUS DP ......................................................................7-13
7.4.4 Diagnostics for PROFINET IO ........................................................................ 7-15
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Contents
8Appendix 8-1
8.1 Components of the Product.............................................................................. 8-1
8.2 Standards and Approvals ................................................................................. 8-6
8.3 Installation Dimensions..................................................................................... 8-7
8.4 Interface Assignment of the Processing Unit.................................................... 8-9
8.5 Calculating the C-mount Lens and the Size of the Field of View
for Data Matrix Codes at a Given Distance .................................................... 8-12
8.6 Technical Specifications ................................................................................. 8-15
8.6.1 Vision Sensor SIMATIC® VS 130-2/VS 130-2vcr .......................................... 8-15
8.6.2 General Specifications.................................................................................... 8-18
8.6.3 Interface Digital Inputs/Outputs ...................................................................... 8-21
Index Index-1
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Contents
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1 Product Overview
1.1 Product Description
The Vision Sensor SIMATIC VS 130-2 is a code reader for data matrix codes of the
type ECC200 (with the exception of the types "Structured Append" and
"Reader Programming Code") and the codes PDF417 and QR (with the exception
of the types "ECI Code", "Byte Code", "Kanji Code", "Structured Append" and
"FNC1 Code"). The code type is detected during training and adjustment and
during training is saved as a code property.
The Vision Sensor VS 130-2vcr is Vericode reader.
You can use these readers to read the coded labeling of products and then pass
the read code to a PLC or a computer.
The SIMATIC VS 130-2/VS 130-2vcr operates with overhead lighting. The object is
lit from above with the supplied ring flash. With the lamp multiplexer accessory, it is
possible to select one of up to 4 lamps for the lighting.
The Vision Sensor SIMATIC VS 130-2/VS 130-2vcr is available in the following
models:
• SIMATIC VS130-2 for large code areas
(order number of the full package: 6GF1 130-1BA with 2.5 m cable length and
6GF1 130-1BA01 with 10 m cable length)
• SIMATIC VS130-2 for small code areas
(order number of the full package: 6GF1 130-2BA with 2.5 m cable length and
6GF1 130-2BA01 with 10 m cable length)
• SIMATIC VS130-2 for very small code areas
(order number of the full package: 6GF1 130-4BA with 2.5 m cable length and
6GF1 130-4BA01 with 10 m cable length)
• SIMATIC VS130-2 for variable code areas (order number of the basic package:
6GF1 130-3BC with 2.5 m cable length and 6GF1 130-3BC01 with 10 m cable
length) if you use the C- or CS-mount lenses (includes the high-resolution
sensor)
• SIMATIC VS130-2 for variable code areas
(order number of the basic package: 6GF1 130-3BB with 2.5 m cable length
and 6GF1 130-3BB01 at 10 m cable length), if you are using C or CS-mount
lenses and want to use the lens protective housing (6GF9 002-7AA01).
• SIMATIC VS 130-2vcr (Vericode reader) for variable code areas (order number
of the basic package: 6GF1 130-3BB02)
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Product Overview
Reading, matching or verifying code
SIMATIC VS 130-2/VS 130-2vcr can read codes, match the entire code or part of it
with a trained code and relate (verify) the quality values of the currently read code
to the quality values of a trained code.
The entire read character string or only part of it (in other words, filtered) can be
output. When it is output, further characters can de appended at the start or end as
a prefix or suffix.
The SIMATIC VS 130-2/VS 130-2vcr can operate both in standalone mode to
make good/bad decisions or as part of a control system to pass on the read codes
for further processing.
Performance Features
• Reliable reading of data matrix codes or Vericodes even under difficult
conditions (for example, for oil-smeared or needle-punched codes)
• Reading printed or lasered codes of the type PDF417 and QR on a
homogeneous background
• Overhead ring flash with VS 130-2
• Activation of up to 4 lamps using a special lamp multiplexer
• Linking of several trained codes that do not necessarily belong to the same
code type to form a code set with the VS 130-2
• It is possible to specify a region of interest with the VS 130-2
• Fully Web-based user interface
• When using data matrix codes, up to 20 codes can be read per second
• With Vericodes up to 5 code readings per second
• Calculating quality characteristics
• Extensive operator control and monitoring functions even in the processing
mode
• Wide-ranging diagnostics and logging functions: Error image memory and
event logging
• Firmware update over the user interface
• Control over digital I/O, trigger signal and also over RS-232 interface of an
RS-232 Ethernet converter or TCP server
• Acquiring the code without a trigger signal ("Continuous" mode)
• Event output over PROFIBUS DP, PROFINET I/O, RS-232 interface of an
RS-232 Ethernet converter, and TCP connection to PC
You will find the Technical Specifications of SIMATIC VS 130-2/VS 130-2vcr in the
appendix.
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Product Overview
Code Properties
To improve clarity, the following terms are used in the table below:
• Variant 1: SIMATIC VS 130-2 for "large code areas" (6GF1 130-1BA and
6GF1 130-1BA01 with sensor head 6GF2 002-8DA01)
• Variant 2: SIMATIC VS 130-2 for "small code areas" (6GF1 130-2BA and
6GF1 130-2BA01 with sensor head 6GF2 002-8EA01)
• Variant 3: SIMATIC VS 130-2 for "very small code areas" (6GF1 130-4BA and
6GF1 130-4BA01 with sensor head 6GF2 002-8FA01)
• Variant 4: C/CS Mount (6GF1 130-3BB and 6GF1 130-3BB01 with sensor
head 6GF2 002-8CB)
• Variant 5: C/CS Mount (6GF1 130-3BC and 6GF1 130-3BC01 with sensor
head 6GF2 002-8GB)
• Variant 6: C/CS Mount (6GF1 130-3BB02 with sensor head 6GF2 002-8CB) for
acquiring Vericodes
Properties Configuration 1 Configuration 2 Configuration 3 Configuration 4
and
Configuration 6
Configuration 5
CCD resolution 0,11 mm/pixel 0,06 mm/pixel 0.032 mm/pixel Image width /
640 pixels
Image width /
1024 pixels
Minimum dot size
(edge length)
0,6 mm 0,35 mm 0,16 mm Image width /
120 pixels
Image width /
200 pixels
Maximum dot
size (edge
length)
3,5 mm 2 mm 1 mm Image width /
22 pixels
Image width /
35 pixels
Minimum code
dimension
(rows * columns)
10 *10 10 *10 10 *10 10 *10 10 *10
Maximum code
dimension
(rows * columns)
48 *48 48 *48 48 *48 72 *72 1) 72 *72 1)
Clearance
sensor front edge
- test object
100 mm 90 mm 75 mm Depending on
lens
Depending on
lens
Image field 75 mm * 57 mm 45 mm * 34 mm 20 mm * 15 mm depending on
lens
depending on
lens
1) With large code dimensions such as 72*72, make sure that the lens used does not cause any distortion
at the edges.
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Product Overview
1.2 Components
The complete Vision Sensor SIMATIC VS 130-2/VS 130-2vcr consists of the
following:
• Sensor head with CCD sensor chip (CCD = Charge Coupled Device) for
sensing the code
• LED overhead lighting unit, red, degree of protection IP65 as ring flash
(order number 6GF9 004-8BA01; only with VS 130-2)
• Processing unit for code processing, output of results, PROFIBUS DP and
PROFINET I/O communication and parameter assignment
• Cables to connect the individual components
• Installation instructions for installing and wiring the
SIMATIC VS 130-2/VS 130-2vcr
• CD with:
- This manual SIMATIC VS 130-2/VS 130-2vcr (German, English, French,
Spanish, Italian for VS 130-2, German and English for VS 130-2vcr)
- Online help (interfacing the Com Server of W&T, establishing the
connection, setup support)
- Getting Started
- Installation Instructions
- Compact Com Server manual from W&T
- The installation manual SIMATIC S7-300 Automation System, Hardware
and Installation
- Getting Started Collection for PROFINET I/O
- PROFINET System Manual, System Description
- PROFINET IO from PROFIBUS DP to PROFINET IO Programming
Manual
- PROFINET IO Structure of the Diagnostic Data Records Product
Information
- The device master data file SIEM8111.GSD and the corresponding bitmap
file VS1X0__N.DIB (for PROFIBUS DP)
- the GSD file GSDML-V1.0-Siemens-VS130-2-20041021.xml (General
Station Description) and the bitmap file vs100.bmp (for PROFINET I/O)
- Three sample programs (connecting the VS 130-2 to a SIMATIC controller
using FB79, output of the read code to a PC or a PG, archiving diagnostic
information on a PC or PG)
Overview of the complete package
Note
If you want to use C or CS-mount sensors under IP65 conditions, use the lens
protective housing (6GF9 002-7AA01).
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Product Overview
1.3 Processing Configuration
The objects with the code are fed past the sensor head with a suitable conveyor.
They must be located fully within the sensor field of view when being read.
In the training mode, the character content of the code is saved.
In the processing mode, the current code is read and, if required, compared with
the saved content of the trained code. The digital output signals are set according
to the read result: READ (code was localized and decoded), MATCH (code
matches the trained code), N_OK (code was not legible).
The read result is output over PROFIBUS DP, PROFINET IO or over the RS-232
interface of an RS-232 Ethernet interface converter or over a TCP server
depending on the parameter settings.
Triggering
To read the code, you must make sure that the code is completely within in the
sensor field of view and clearly visible.
The code is captured at the trigger time. In this case, you generate an exact and
debounced trigger signal at the trigger time, for example with a laser light barrier.
As an alternative, you can record the code without a trigger signal (trigger source
"endless"). In this case the code is output again only when there is a code change.
This is required, for example, with rotating parts if the exact position of the code is
not known.
You can check your settings with the setup support of the VS 130-2/VS 130-2vcr.
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Product Overview
1.4 Important Requirements for Installation
The following requirements must be met:
• The code must be clearly visible:
- There should be as few reflections as possible in the code field.
- The code field should be uniformly illuminated without shadows.
- All parts of the code should be sharply printed.
• The sensor can be up to 40° from the vertical.
• The distance between the code and the image edge should be at least two dot
widths.
1.5 Applications
Below, you will see several examples of data matrix codes, QR, PDF417 and
Vericodes:
• Printed data matrix code
• Lasered data matrix code (plastic surface)
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Product Overview
• Lasered data matrix code (pcb)
• Data matrix code created with inkjet printer
• Punched data matrix code
• Needle punched data matrix code
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Product Overview
• Printed QR code
• Printed PDF417 code
• Vericode
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Product Overview
1.6 The lamp multiplexer accessory
If there are varying lighting conditions in the vicinity of the sensor head, it is
sometimes advisable to work with different lamps at different times. You can
therefore connect up to 4 flash lamps to the Vision Sensor VS 130-2/VS 130-2vcr
using he lamp multiplexer (6GF9 002-7BA).
Note
The lamp multiplexer can only be used if you have set the multilight mode. If you
not activate the multilight mode, you must connect your lamp directly to the
processing unit.
The lamp multiplexer is shown in the figure below.
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Product Overview
Connecting the lamp multiplexer
You connect to the processing unit as follows: Connect a lighting cable
(6GF9 002-8CE) to the LAMP socket of the processing unit and to the input socket
LIN. of the lamp multiplexer.
Connect each of the maximum four lamps to the lamp multiplexer over a lighting
cable. Lamp 1 is assigned to socket L1, lamp 2 to socket L2 etc.
Connect the socket connector "DI/DO" of the processing unit to the left-hand plug
connector "DI/DO" of the lamp multiplexer with the supplied special cable. You can
connect a digital communication cable (6GF9 002-8CB) to the right-hand plug
connector "DI/DO". Please remember that you must not then use the MATCH and
NOK signals. These are used to select a lamp.
Note
If you connect the lamp multiplexer with connected lamps to a
VS 130-2/VS 130-2vcr while this is operating, this can lead to the processing unit
resetting itself in some situations.
Installing the lamp multiplexer
You have the following installation options:
• Wall-mounting using the two holes at the upper end of the lamp multiplexer
• Installation on a standard rail: In this case, screw the supplied rail adapter to
the back of the lamp multiplexer.
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Product Overview
1.7 Requirements for Codes and Legibility
1.7.1 What is Required of Data Matrix and Vericodes?
General Requirements for Data Matrix and Vericodes to Ensure Readability
VS 130-2 can read data matrix codes with properties corresponding to those
published in the standard for data matrix codes. In many ways, VS 130-2 reacts
tolerantly even when certain basic properties are absent and is capable of dealing
with difficulties that are not specified in the standard.
As a result, VS 130-2 and VS 130-2vcr have a very wide range of application in
normal situations, a fact reflected in the following broad limits:
• It can read codes in which directly adjacent code points have a minimum
distance of only 5 pixels and up to a maximum distance of 35 pixels.
• The deviation of the sensor axis from the vertical can be between 0 °und 40 °.
• The code field can approach the edge of the image up to a distance equivalent
to twice the code point diameter.
• The dominant polarity of the code points compared with the background is
required uniformly for all points (as it was during the training procedure). Slight
shadows or shiny areas are tolerated.
• The ratio of the distance to the closest neighbor and the diameter of any code
point can be between 2 and 0.8.
• Although code points must be printed according to a regular square grid
pattern, individual points can be displaced from their ideal position by up to 1/3
of the grid unit. Even slight parallelogram-shaped distortion is tolerated.
• With large-image but small-dimensioned codes, slight curves in the printed
material surface are tolerated. With high-value codes (for example, more than
14 x 14) or a strongly inclined sensor axis, curves are not allowed.
• Large tolerance of background disturbances that cannot be described
quantitatively
• Large tolerance of poor contrast conditions
• Due to the limited image resolution, codes with a maximum code dimension of
72x72 can be read.
In terms of these limit characteristics and when using minimum read rates due to
the requirements of the application (can be set with the "Cycletimelimit" parameter)
the tolerances are generally restricted, in some cases in stages, or other conditions
come into play. The limits described below are intended mainly as guidelines since
the actual conditions in a real application cannot be assessed accurately in
advance. It is therefore conceivable that higher read rates can be achieved even if
individual conditions are not fully adhered to.
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Product Overview
Processing Method for Reliable Reading of Difficult Data Matrix Codes and
Vericodes
Settings:
• Speed = low
• Exposure = Manual or Auto V1 or Auto
The self-adapting recognition method of VS 130-2/VS 130-2vcr allows the most
difficult codes to be read reliably. The most reliable detection is reached by
VS 130-2/VS 130-2vcr when you make adequate time available for adaption by
setting a high cycle time limit.
The recognition method is designed for a variety of practical situations in which
various aspects of the read configuration cannot be considered ideal. For example:
• Any alignment and position of the code in the image
• Reading codes even when dots overlap or are largely isolated
• Reading codes recorded mirror-inverted
• Tolerance of distortion, due for example to inclined installation of the image
sensor (view angle down to a lower limit of approximately 50° to the printed
surface)
• Resistant to similar-looking foreign objects in the area of the code
• Resistant to interference patterns (grooves, granularity) in the area of the code
• Good tolerance of contrast fluctuations
• Good range of imaging size from 5 to 35 pixels per dot
Rectangular or square codes (with data matrix codes with maximum dimensions of
72 x 72 dots) can be read, whereby the brightness polarity (bright on dark or dark
on bright) is unimportant.
If individual conditions are particularly favorable and stable in a concrete situation
(and therefore less effort is required for internal adaption), the read rate of
VS 130-2/VS 130-2vcr can reach a peak of 20 per second. You can influence this
by setting the "Speed" and "Cycle time limit" parameters as described below.
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