Rockwell-automation 2755 Atomscan Bar Code Scanner User Manual

ALLEN-BRADLEYAtomScan Bar Code Scanner(Catalog No. 2755-L6SA, -L6RA, -L6SB, -L6RB )User Manual

Chapter 2AtomScan Product Family2–4AtomScan scanners require an adapter and a cable to connect with anEnhanced Decoder. The scanners are compatible wi

Chapter 2AtomScan Product Family2–5A Package Detector is used to sense when a package containing a bar codesymbol is in position to have that symbol s

A–B3Chapter3–1Designing the SystemThis chapter provides information needed to set up the scanner correctly,including:• Bar code symbols• Symbol orient

Chapter 3Designing the System3–2There are two basic types of bar code symbols.One-dimensionalThe one-dimensional bar code symbols have one row of bars

Chapter 3Designing the System3–3Bar Code Symbol Length and HeightWhen measuring a symbol, orientation must be ignored. Its height ismeasured from one

Chapter 3Designing the System3–4Bar code symbols must be in the correct position as they move by thescanner. The scan line must cross every bar, space

Chapter 3Designing the System3–5Figure 3.3Step Ladder OrientationScanner MountedOn Side of ConveyorScanner MountedAbove ConveyorDirection ofTravelDire

Chapter 3Designing the System3–6The AtomScan scanner can read a symbol correctly even if the symbol orpackage is not correctly oriented. Figure 3.4 sh

Chapter 3Designing the System3–7Figure 3.5Correct Setup of Scanner20_-30_20_-30_Scanner between 20_ and 30_above or below the symbolWhen using “A” ran

Chapter 3Designing the System3–8Determining the Read RangeThe Read Range is the distance from the face of the scanner over which a barcode symbol can

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

Chapter 3Designing the System3–9Table 3.A and Table 3.B show the relationship among the symbol density(width of the narrowest bar or space), the Read

Chapter 3Designing the System3–10Raster HeightA raster scanner is used when the bar code symbol is of poor quality:• symbols printed on a dot matrix p

Chapter 3Designing the System3–11Picket Fence ApplicationsTo calculate minimum scans per symbol, use this formula:R (W–L)CS = Scans per labelR=W= Scan

Chapter 3Designing the System3–12Step Ladder ApplicationsTo calculate scans per symbol for step ladder applications, use this formula:R x HCS = Scans

Chapter 3Designing the System3–13When a symbol is pitched, the bars appear to the scanner to be narrower andcloser together than if it faced the scann

Chapter 3Designing the System3–14Example:A 10 mil (0.25 mm) symbol including Quiet Zones is 3 inches (7.6 cm) long.It is pitched at 30_. What differen

Chapter 3Designing the System3–15Table 3.CCosines and Tangents for Various Pitch AnglesUse for Apparent Narrow Element Use for Lost Read DistancePitch

Chapter 3Designing the System3–16 Step 1 + Step 2. With both of these aspects working together, the ReadRange is shorter with a pitched symbol than wi

A–B4Chapter4–1Installing the AtomScan ScannerThis chapter provides the information needed to mount, wire, and correctlyaim the scanner. The following

Chapter 4Installing the Scanner4–2 The scanner can be mounted either from the bottom, or from the top with theoptional mounting plate. The only tool y

AtomScan User ManualUser ManualTable of ContentsChapter 1Chapter Objectives 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 4Installing the Scanner4–3• If you do not use the mounting plate, use the measurements given inFigure 4.2 to locate centers of mounting holes.

Chapter 4Installing the Scanner4–4The scanner is connected to the Enhanced Decoder through the AdapterModule. The scanner cable is plugged into the Ad

Chapter 4Installing the Scanner4–5A package sensor may be used to trigger the scanner and decoder. It must beplaced so that it is tripped for the enti

Chapter 4Installing the Scanner4–6Connecting the Package SensorChapter 2 gives the information needed to select a retro-reflective photo switch, and a

A–B5Chapter5–1Operating the ScannerThis chapter provides information on how to set up and operate theAtomScan bar code scanner. This includes:• Laser

Chapter 5Operating the Scanner5–2!ATTENTION: If during operation an intense dot of light isgenerated instead of a thin line of light, immediately remo

Chapter 5Operating the Scanner5–31. Place the bar code symbol where it can be read.2. Assure that the scan line crosses all the bars and both quiet zo

A–B6Chapter6–1Maintenance and TroubleshootingThis chapter provides information necessary to maintain your scanner. Thesetopics are covered:• Cleaning

Chapter 6Troubleshooting and Maintenance6–2This section lists problems that may occur with the scanner and/or connecteddecoder. Each problem lists pos

AAppendixA-1SpecificationsLaser SpecificationsWavelength 670 nm nominalSafety Class CDRH Class IIOperating Life50,000 hrs. @ 25_ CScanning ParametersS

AtomScan User ManualUser ManualTable of ContentsChapter 4Chapter Objectives 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

IndexIndex – 1AAdapter ModuleSee also SystemCatalog No., 2–4Setup Diagram, 2–4CCables, Catalog Nos., 2–4Cleaning, Scanner Window, 6–1DDecoderSee also

IndexIndex – 2SSafety, Warnings, 2–2, 5–3Scan WidthDefine, 3–8Read Ranges, 3–8 to 9ScannerCleaning Window, 6–1Features, 2–3Installation, 4–1 to 6Mount

IndexIndex – 1AAdapter ModuleSee also SystemCatalog No., 2–4Setup Diagram, 2–4CCables, Catalog Nos., 2–4Cleaning, Scanner Window, 6–1DDecoderSee also

IndexIndex – 2SSafety, Warnings, 2–2, 5–3Scan WidthDefine, 3–8Read Ranges, 3–8 to 9ScannerCleaning Window, 6–1Features, 2–3Installation, 4–1 to 6Mount

Publication 2755–840 – May 1995 40062-304-01(A)Copyright 1995 Allen-Bradley Company, Inc. Printed in USAWith major offices worldwide.Algeria • Argen

A–B1Chapter1–1Using this ManualThis chapter gives an overview of the manual, including:• Contents of manual• What you need to know• Conventions and te

Chapter 1Using this Manual1–2AtomScan scanners are Class II Laser Devices as specified by the Center forDetection of Radiation Hazards (CDRH). Momenta

A–B2Chapter2–1AtomScan Product FamilyThis chapter gives an overview of features and accessories of AtomScanscanners:• Overview of the AtomScan scanne

Chapter 2AtomScan Product Family2–2The scanners use a low power visible laser diode. As with any bright lightsource, such as the sun, you should avoid

Chapter 2AtomScan Product Family2–3Features of AtomScan scanners include: • low power consumption• wide field of view• the ability to read a wide rang