Allen-Bradley 2-D Manual do Utilizador Página 42
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3–4 Operating the Scanner
Publication 2755-6.4
When the scanner has decoded a symbol successfully:
• laser turns off
• green LED lights
• short, high-tone beep occurs
4. Decoded data is transmitted to the host device using the
communication parameters described in Chapter 5.
Scan the Entire Bar Code Symbol
•
The larger the symbol, the farther away you should hold the
scanner to permit the raster pattern to cover the symbol (but not
more than 8 inches).
• Hold the scanner close for denser symbols (but not less than 2
inches).
• In all cases, make sure the scan pattern extends at least three
quarters of an inch beyond each edge of the bar code.
• The PDF417 bar code symbol has multiple rows, but the raster
pattern also has multiple scanning rows. Do three basic things
when scanning:
– Center the aiming pattern on the bar code.
– Keep the pattern in the same horizontal plane as the bar code.
Orienting Scan Pattern on PDF417 Bar Code
3/4”
3/4”
- 2-D Hand-Held 1
- Bar Code 1
- Scanners 1
- Important User Information 2
- • identify a hazard 2
- • avoid the hazard 2
- • recognize the consequences 2
- Table of Contents 3
- Table of Contentstoc–ii 4
- Table of Contentstoc–iv 6
- Table of Contentstoc–vi 8
- • intended audience 9
- • contents of this manual 9
- • related publications 9
- • laser warning symbol 9
- Intended Audience 9
- Contents of this Manual 10
- Related Publications 11
- Laser Warning Symbol 11
- Scanner Features 12
- 1–2 Scanner Features 13
- Cable Connector 13
- LED Indicators 14
- Safety Labels 15
- Smart Raster 16
- Scanning Options 17
- Scanner Features 1–7 18
- Scanning Ranges 19
- • 1-D bar codes 19
- • 2-D bar codes 19
- Read Ranges 20
- 1-D Bar Codes 20
- 2-D Bar Codes (PDF417) 21
- 2-D Bar Codes 21
- Accessories 22
- • 8 ft. / 2.44 meter 22
- 1–12 Scanner Features 23
- • (Catalog No. 2755-HFN-K3) 24
- • (Catalog No. 2755-HTN-H1) 24
- Connecting the Scanner 25
- Overview 26
- • RS-232 Synapse cable 26
- Scanner Cable Connection 27
- • IBM PC/AT 32
- • IBM PC/XT and compatibles 32
- • IBM PS/2-30 32
- Scanner to PLC Connection 37
- Scanner to SLC Connection 38
- Operating the Scanner 39
- Scanning 2-D Bar Codes 41
- • Press the trigger 41
- Specular Reflection 44
- Dead Zone 45
- Beeper Indications 46
- This Response Indicates 47
- Configuring the Scanner 48
- Scanner Default Settings 49
- 4–4 Configuring the Scanner 51
- Code 39 Options 52
- UPC / EAN Options 53
- UPC / EAN Options (Continued) 54
- • system character only 54
- • no preamble 54
- Code Lengths 55
- Configuring the Scanner 4–9 56
- – Scan This Symbol First 57
- – <Prefix><Data> 57
- Decode Options 59
- – Pause Duration 59
- – 0 (under Pause Duration) 59
- – 5 (Under Pause Duration) 59
- – Decode Attempt Duration 60
- – 6 (under Pause Duration) 60
- – 0 (Under Pause Duration) 60
- Communication Setup (Synapse 62
- • Catalog No. 2755-HFC-SR2-01 63
- • Catalog No. 2755-HFC-SR3-01 63
- • RTS State Low (default) 66
- • RTS State High 66
- • Catalog No. 2755-HFC-SP1-01 70
- • Catalog No. 2755-HFC-SP2-01 70
- Settings 70
- • Medium 50 msec delay 72
- • Long 99 msec delay 72
- • Catalog No. 2755-HFC-SV2-01 74
- Synapse Cable Options 77
- • Catalog No. 2755-HFC-SV1-01 77
- • DEC VT 220/320 (default) 77
- • DEC VT420 77
- • Catalog No. 2755-HFC-SA1-01 80
- Chapter 6 85
- Troubleshooting the Scanner 86
- Cleaning the Scan Window 88
- A-B Technical Support 88
- Specifications 89
- Mechanical 90
- Environmental 90
- Laser Certifications 90
- Agency Certifications 90
- Scanner Pinout Connections 91
- ASCII Chart 92
- Undefined 94
- ALT Key Values 95
- Miscellaneous Key Values 95
- Numeric Key Values 96
- Extended Keyapd Key Values 96
- AIM Code Identifiers 97
- Advanced Data Formatting 99
- Publication 2755-6.4 100
- Advanced Data Formatting E–3 101
- E–4 Advanced Data Formatting 102
- Criteria 103
- E–6 Advanced Data Formatting 104
- Advanced Data Formatting E–7 105
- ADF Formatting Example 106
- Entering Rules bar code 107
- E–10 Advanced Data Formatting 108
- Advanced Data Formatting E–11 109
- • Third Rule 110
- • Second Rule 110
- • First Rule 110
- Default Rules 111
- European Union Directives 113
- F–2 European Union Directives 114
- Glossary 115
- G–2 Glossary 116
- Glossary G–3 117
- G–4 Glossary 118
- Glossary G–5 119
- G–6 Glossary 120
- Glossary G–7 121
- G–8 Glossary 122
- Glossary G–9 123
- G–10 Glossary 124
- Glossary G–11 125
- G–12 Glossary 126
- Glossary G–13 127
- G–14 Glossary 128
- Worldwide representation 134
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