Allen-Bradley 2755 Manual do Utilizador Página 1

UserManualAdaptaScanBar Code Readers(Cat. No. 2755-SN3,-SN5, -SN8)Allen-Bradley

Overview 1–2A typical AdaptaScan installation consists of:• Reader• Wiring Base• Package DetectorConfiguration CablePersonal Computer(For Configuratio

Overview 1–3Scan WindowLED IndicatorsConfigurationPort ConnectorWiring BaseConnectorDust CapThe Reader scans and decodes bar code symbols. The integ

Overview 1–4LED IndicatorsSeven LEDs provide the following indications.Indicator Condition Indicates:Green Normal operating stateFlashing Green Initia

Overview 1–5The flexibility of the Reader allows you to configure it for a varietyof applications. This section shows the basic system types.Standal

Overview 1–6Distributed (DeviceNet Master/Slave, DH-485)The distributed application below shows three Readers scanning barcodes at different points in

Overview 1–7Distributed (DeviceNet Peer-to-Peer)Peer-to-Peer communications allows a single Reader to gather datafrom other Readers over a DeviceNet

Overview 1–8You can configure a Reader as either a linear or raster scanner. Theorientation of the bar code label with the scanner usually determines

Overview 1–9The Reader plugs into a wiring base. All wiring base connectionsare made using common electrician tools. Install the Reader after thewi

Overview 1–10Reader ConnectorThe Reader plugs into this connector. All power andcommunications with the Reader occurs through this connector.I/O Modu

Overview 1–11This section defines the communication options for the Reader.DeviceNet NetworkAdaptaScan Readers support both DeviceNet Master/Slave an

Solid state equipment has operational characteristics differing from those ofelectromechanical equipment. “Safety Guidelines for the Application,Insta

Overview 1–12RS-422 / RS-485An RS-422 / RS-485 port allows point-to-point communications witha single device. Through the RS-485 port, the AdaptaScan

Overview 1–13RS-232The RS-232 port provides point-to-point communications with adevice having an RS-232 port, such as a PLC-5 Channel 0 port orcomput

Overview 1–14The AdaptaScan Software (Catalog No. 2755-ASN), a WindowsTMbased package, lets you configure a Reader through a series ofmenus, tools and

Overview 1–15Scanning ParametersYou can configure the Reader for linear or raster scanning. Setupdialogs determine when and how the laser scans a ba

Overview 1–16Decoding OperationsMenus and dialog boxes also define parameters that determine whenand how decoding occurs and the destination of the da

Overview 1–17The Readers use a visible laser diode. As with any bright lightsource, such as the sun, you should avoid staring directly into thebeam.

Overview 1–18The following Readers are available.Item Description Catalog No.300 scans per second, raster/linear scan,VLD, scanner/decoder2755-SN3➀Rea

Chapter 2Installation ConsiderationsThis chapter describes important factors that affect how theAdaptaScan Bar Code Reader is oriented in respect to

Installation Considerations 2–2The Reader supports raster and linear scanning. The Reader can bemounted in either a step ladder or picket fence orien

Installation Considerations 2–3The skew, pitch and tilt of a bar code symbol affect its readability. Symbols that are pitched or skewed up to 45 ar

  iPrefaceChapter Objectives P–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview of this Ma

Installation Considerations 2–4The usable beam width depends on the Reader type, the scan angleand the distance from the bar code symbol. Make sure t

Installation Considerations 2–5Maximum Usable Beam Width (Catalog No. 2755-SN5)70 inches (1.78 meter)65 inches (1.65 meter)60 inches (1.52 meter)55 i

Installation Considerations 2–6An element is either a bar or space between bars in a bar code. Themaximum read range is determined by the narrowest e

Installation Considerations 2–7You can adjust the scan beam after the Reader is installed. Onlineadjustments can affect the width and location of th

Installation Considerations 2–8The following tables show tabular read range limits for the threeversions of the AdaptaScan Readers.Table 2.A Read Ran

Installation Considerations 2–9Use the following formulas to calculate the number of scans perlabel and the minimum number of scans per second needed

Chapter 3Installing the Wiring Base andPower SupplyThis chapter describes how to install and mount the wiring base.Section PageGeneral Mounting Guid

Installing the Wiring Base and Power Supply 3–2Make sure there is adequate space around the Reader for:• Mounting and removing the Reader• Wiring base

Installing the Wiring Base and Power Supply 3–3Wiring BaseThe wiring base is available in two versions:• U.S. Version (Catalog No. 2755-NB40)• Metric

Installing the Wiring Base and Power Supply 3–4There are 2 options for mounting the wiring base (Catalog No.2755-NB40 or -NB41):• Top Mounting – Mount

Table of ContentsiiAdaptaScan Software (Catalog No. 2755-ASN) 1–14. . . . . . . . . . . . . . . . . . . . . . Scanning Parameters 1–15. . . . . . .

Installing the Wiring Base and Power Supply 3–5Bottom MountingThe wiring base mounts from the bottom to any flat surface withthree mounting screws.

Installing the Wiring Base and Power Supply 3–6All permanent Reader connections are made to the wiring base.Wiring connections are made with conduit o

Installing the Wiring Base and Power Supply 3–7ConduitUse flexible conduit whenever possible. This allows you to adjustthe position of the Reader (w

Installing the Wiring Base and Power Supply 3–8The mounting bracket kit (Catalog No. 2755-NM42) is suitable for avariety of applications. This bracket

Installing the Wiring Base and Power Supply 3–9Top Post MountingThe mounting plate attaches to the bottom of the wiring base withthree screws (see ne

Installing the Wiring Base and Power Supply 3–10Side Post MountingThe mounting plate attaches to the bottom of the wiring base withthree screws that a

Installing the Wiring Base and Power Supply 3–11Installing the Safety WireInstall the safety wire whenever the mounting bracket is installed inan inv

Installing the Wiring Base and Power Supply 3–12The Reader requires 14 watts (maximum) of power. The Readeraccepts 11 to 28 VDC at either one of the

Installing the Wiring Base and Power Supply 3–13Catalog No. 2755-PW46 Power SupplyThe 120 VAC Power Supply (Catalog No. 2755-PW46) providespower to o

Installing the Wiring Base and Power Supply 3–14Single Reader Power ConnectionBelow is a single power supply (Catalog No. 2755-PW46, -PW47)providing p

Table of ContentsiiiPower Requirements 3–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Supplies 3–12. .

Installing the Wiring Base and Power Supply 3–15Reader 2Reader 3Reader 1Other DeviceNetDevices24V+V- 24V+V- 24V+V-Ground Screwon Wiring BaseGround Sc

Installing the Wiring Base and Power Supply 3–16For network wiring, the wiring base has two DeviceNet terminalblocks; one for incoming power and commu

Installing the Wiring Base and Power Supply 3–17The wiring base has an RS-485/RS-422 terminal block forpoint-to-point or network communications. Up

Installing the Wiring Base and Power Supply 3–18The RS-232 port provides point-to-point communications atdistances up to 50 feet (15.2 meters). Use t

Installing the Wiring Base and Power Supply 3–19The wiring base supports 2 optional input or output modules. Any ofthese modules can be used. These

Installing the Wiring Base and Power Supply 3–20Output Module ApplicationShown below is a typical output module application. Whenconnecting high impe

Installing the Wiring Base and Power Supply 3–21Input Module ApplicationExternal Power SourceA typical input module application using external power

Installing the Wiring Base and Power Supply 3–22The package detect input accepts only a current sinking output.Allen-Bradley Photoswitchr package dete

Installing the Wiring Base and Power Supply 3–23The following is a typical package detector configuration:PackageDetectorReflectorConnect the package

Chapter 4Installing / Removing theReaderThis chapter describes how to install the Reader on the wiring base.Section PageInstallation 4–1Power-up Se

Table of ContentsivAppendix AElectrical A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechan

Installing / Removing the Reader 4–2On initial power-up, the Reader performs a series of self-diagnostictests and LED tests (all LEDs flash). When th

Installing / Removing the Reader 4–3To replace a Reader:Note: If you are installing more than one Reader on a network,install each Reader one at tim

Chapter 5Downloading ConfigurationsThis chapter describes how to download a configuration between theReader and a personal computer running the Adap

Downloading Configurations 5–2The following figure shows the connections for downloadingfirmware or a Reader configuration.Personal ComputerConfigurat

Downloading Configurations 5–3This section shows the procedure used to download new firmware tothe AdaptaScan Bar Code Reader. Each Reader is shippe

Downloading Configurations 5–4This section shows how to download a configuration to one or moreReaders. Verify that your computer is connected to a R

Chapter 6Troubleshooting andMaintenanceThis chapter describes how to isolate and correct the most commonoperating problems and perform routine maint

Troubleshooting and Maintenance 6–2Table 6.A Troubleshooting ChartProblemProbable Cause(s) Corrective Action(s)Reader does not power up. No LED indi

Troubleshooting and Maintenance 6–3Use the 7 LED indicators to isolate operating problems. Figure 6.1 LED IndicatorsOn SymbolCondition IndicationYell

Troubleshooting and Maintenance 6–4NetworkCondition IndicationGreen Normal DeviceNet operating state.Flashing Green Communication link established but

PrefaceUsing this ManualRead this chapter to familiarize yourself with the rest of the manual. You will learn about:• Contents of this manual• Intend

Troubleshooting and Maintenance 6–5!ATTENTION: Other than cleaning the scan window,no user maintenance of the Reader is required. Do notopen the e

Troubleshooting and Maintenance 6–6The scan window fits into an opening behind the front of the Reader.A bezel and gasket create a NEMA Type 4 seal.Th

Troubleshooting and Maintenance 6–73. Remove the six #6-32 screws from the bezel/window assembly.4. Carefully pull bezel/window assembly away from th

Appendix ASpecificationsElectricalVoltage 11 to 28V DCPower 14 Watts maximumMechanicalEnclosureNEMA Type 4 (when used with properly sealedwiring bas

Specifications A–2OpticalLight Source Visible Laser Diode (TE Cooled)Wavelength 660 nmOutput Power 1.0 mW maximumScan Rate (Nominal)Catalog No. 2755-S

Specifications A–3CertificationsUL ListingLISTEDLISTEDUL ListedUL Listed to Canadian safety standardsEuropean Union Directive Electromagnetic Compati

Appendix BDIN Rail MountTerminal BlocksThis appendix lists Allen-Bradley DIN Rail Mount Terminal Blocks(with diodes, fuses and resistors) that are a

Appendix CEuropean Union DirectiveComplianceIf this product is installed within the European Union or EFTAregions, the following regulations apply.T

European Union Directive Compliance C–2Declaration of Conformity

AACKAn ASCII control character used to acknowledge the reception andacceptance of a transmission block.address1) A character string that uniquely iden

Using this ManualP1–2Because the AdaptaScan Software runs in the Microsoft Windowsenvironment, you should know how to use a mouse, choosecommands, and

GlossaryG–2BbarThe dark element of a printed bar code.bar codeAn array of parallel rectangular bars and spaces that togetherrepresent data elements or

Glossary G–3Ccapture countThe number of consecutive identical valid decodes that result in avalid read.characterOne symbol of a set of symbols that no

GlossaryG–4continuous codeA bar code symbology where all spaces within the symbol are partsof the characters (Interleaved 2 of 5). There is no intera

Glossary G–5element widthThe thickness of an element measured from the edge closest to thesymbol start character to the trailing edge of the same elem

GlossaryG–6Iinter-symbol no–read countThe minimum number of no–reads that must occur between symbolsscanned when Self–Triggered (continuous decode) is

Glossary G–7find and replacement strings. There are both metacharacter searchand replacement characters.misreadA condition which occurs when the data

GlossaryG–8OorientationThe alignment of bars and spaces to the scanner. Often referred to asPicket Fence or Step Ladder.output counterA counter that

Glossary G–9Qquiet zoneSpaces preceding the start character of a symbol and following thestop character. Sometimes called the clear area.RreadA condi

GlossaryG–10self-checkingA bar code or symbol using a check algorithm which can be appliedto each character to guard against undetected errors. Codes

Glossary G–11symbologyThe conventions, or rules, which govern the formation of charactersand strings of characters in a bar code symbol.symbology iden

Chapter 1This chapter briefly describes the AdaptaScan Bar Code Reader.Section PageTypical System 1–2Reader 1–3Typical Applications 1–5Sc

GlossaryG–12XX dimensionThe nominal dimension of the narrow bars and spaces in a bar codesymbol.

Aaccessories, 1–18Apparent element width, 2–6Applications, 1–5distributed (master–slave), 1–6distributed (peer–to–peer), 1–7standalone, 1–5Autof

IndexI–2OOn Symbol Indicator, 6–3Operating environment, 1–4Output module application, 3–20Output Modules, Specifications, A–2PPackage detect termi

Index I–3UUsable beam widthcatalog no. 2755–SN3, 2–4catalog no. 2755–SN5, 2–5catalog no. 2755–SN8, 2–5WWiring basebottom mounting, 3–5cabling, 3–

Code 39HIGH DENSITYLOW DENSITYMEDIUM DENSITYCode 128HIGH DENSITYLOW DENSITYMEDIUM DENSITYInterleaved 2 of 5HIGH DENSITYLOW DENSITYMEDIUM DENSITYUniver

PART NO. (P)QUANTITY (Q)SUPPLIER (V)SERIAL (S)2784291060 0 0 1 2 3 4 5 6 7 8 9 0 59 00 38200 11413 8

Publication 2755-837 – September 1997Rockwell Automation helps its customers receive a superior return on their investment by bringingtogether leading