Rockwell-automation 2755 AtomScan Bar Code Reader Bedienungsanleitung Seite 26
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3–6 Designing Your Scanner System
Publication 2755-6.9
Skew
A symbol is skewed when the ends of the symbol’s bars are not at
the same distance from the reader. The symbol can be read if the
distance of both ends of the bar are within the reader’s read range,
and the skew is less than 40 degrees from the centerline. Unlike
pitch, skew does not affect the read range.
Note: Some skew is necessary to prevent strong reflected light
(specular reflection) from interfering with a successful read. A skew
between 20°-30° is ideal. Or skew may be combined with pitch to
give the following angle.
20_-30_
20_-30_
Reader between 20_ and
30_above or below the symbol
The readers can read bar code symbols at various distances
depending upon the type of reader and the narrowest bar code
element width (width of smallest bar or space). With picket fence
orientated labels, scan width is a factor in determining the time it
takes to read a bar code symbol.
Catalog Number
Minimum Bar Code
Width
Read Range
Maximum Scan
Width
2755-LS7-SA,
5.0 mils (0.13 mm) 2.0 to 3.1 in. (5.08 to 7.87 cm) 2.1 in. (5.33 cm)
2755-LS7-RA
7.5 mils (0.19 mm)
2.0 to 4.0 in. (5.08 to 10.2 cm) 3.6 in. (9.14 cm)
2755-LS7-SB,
7.5 mils (0.19 mm) 2.5 to 5.5 in. (6.35 to 14.0 cm) 4.0 in. (10.2 cm)
2755-LS7-RB
10 mils (0.25 mm)
2.0 to 6.5 in. (5.08 to 16.5 cm) 5.0 in. (12.7 cm)
15 mils (0.38 mm) 2.0 to 7.5 in. (5.08 to 19.0 cm) 6.0 in. (15.2 cm)
20 mils (0.51 mm) 2.0 to 10.0 in. (5.08 to 25.4 cm) 7.0 in. (17.8 cm)
30 mils (0.76 mm) 2.0 to 10.0 in. (5.08 to 25.4 cm) 7.0 in. (17.8 cm)
40 mils (1.02 mm) 2.0 to 10.0 in. (5.08 to 25.4 cm) 7.0 in. (17.8 cm)
2755-LS7-SBV,
7.5 mils (0.19 mm) 1.25 to 4.0 in. (3.18 to 10.2 cm) 4.0 in. (10.2 cm)
2755-LS7-RBV
10 mils (0.25 mm)
1.0 to 5.0 in. (2.54 to 12.7 cm) 5.0 in. (12.7 cm)
15 mils (0.38 mm) 1.0 to 6.0 in. (2.54 to 15.2 cm) 6.0 in. (15.2 cm)
20 mils (0.51 mm) 1.0 to 8.5 in. (2.54 to 21.6 cm) 7.0 in. (17.8 cm)
30 mils (0.76 mm) 1.0 to 8.5 in. (2.54 to 21.6 cm) 7.0 in. (17.8 cm)
40 mils (1.02 mm) 1.0 to 8.5 in. (2.54 to 21.6 cm) 7.0 in. (17.8 cm)
Determining Read Range
- AtomScan 1
- Code Readers 1
- Allen-Bradley 1
- Important User 2
- Information 2
- Table of Contents 3
- Configuring Your Reader 4
- Hardware Operation 4
- Table of Contents toc–iii 5
- Chapter Objectives 7
- Contents of this Manual 7
- Conventions Used in this 8
- Intended Audience 8
- Related Publications 8
- Introduction to AtomScan 9
- Procedures 10
- 3. Install the reader 11
- 4. Install the interface box 12
- 5. Install the power supply 12
- • baud rate = 9600 13
- • parity = even 13
- • stop bits = one 13
- • data bits = 7 13
- Hardware Features 16
- Interface Box Features 17
- Decoding 18
- Safety Information 19
- Scan Beam Options 20
- Accessories 20
- Designing Your Scanner System 21
- Symbol Height and Length 22
- Symbol Quality 22
- Symbol Orientation 23
- Direction 24
- Tilt, Pitch, and Skew 25
- Determining Read Range 26
- Calculating the Number of 29
- Picket Fence Calculation 30
- Installing Your Hardware 31
- Installing the System 32
- Hardware 32
- 4–4 Installing Your Hardware 34
- Mounting Surface 34
- Connecting System 35
- Hardware Together When 35
- Using an Interface Box 35
- Using an Interface Box in a 41
- Daisy-Chain Configuration 41
- 4–14 Installing Your Hardware 44
- Not Using an Interface Box 45
- 5–4 Configuring Your Reader 49
- [Control]. It 49
- [0] (zero) 49
- Communications Menu 50
- Host Protocol Parameters 51
- 5–7Configuring Your Reader 52
- Operations Menu 54
- 5–13Configuring Your Reader 58
- 5–14 Configuring Your Reader 59
- Code Types Menu 60
- 5–17Configuring Your Reader 62
- 5–18 Configuring Your Reader 63
- • Status 64
- Scanner Output Menu 65
- 5–22 Configuring Your Reader 67
- Scanner Setup Menu 68
- Serial Configuration 69
- Concatenating Serial Commands 70
- Serial Command Status Request 70
- Losing Communications 70
- Serial Configuration Commands 71
- Sserial command status,serial 72
- • Auxiliary Port 76
- • External Trigger Level 77
- • Match Code Type 77
- • New Master Pin 78
- • Narrow Margins 78
- • Bar Code Output 81
- • Beeper 82
- • Laser On/Off 82
- • Serial Verification 82
- Decode Test 84
- Adjusting Reader 84
- Parameters 84
- Scan Width 85
- Label Speed 85
- Status Commands 91
- Operating Scanner System 94
- • Postamble = CR (^M) 95
- • Postamble is enabled 95
- • transparent 96
- • non–buffered full-duplex 96
- • non-buffered half-duplex 96
- 6–14 Hardware Operation 99
- [<Zd>] (Restore/Save 99
- Reader RS-232RS-232 IB1 Host 99
- Publication 2755-6.9 100
- Operating the Power Supply 101
- Operating the Host Device 101
- Chapter 7 102
- Troubleshooting the 103
- Technical Support Services 104
- Specifications 105
- Reader Specifications 106
- Interface Box 107
- Power Supply 107
- Cable Pinouts 108
- Interface Box Pinouts 109
- Scanner Port 110
- RS-485/422 Port 110
- RS-232 Port 111
- ASCII Table 112
- Multidrop Communications 113
- Polling Sequence 115
- Select Sequence 116
- Application Examples 117
- Flexible Interface Module 119
- Application Examples E–5 121
- Module data 122
- SLC 5/03 and SLC 5/04 123
- Controllers 123
- SLC Program 126
- PLC-5 Controller 127
- PLC-5 controllers 128
- PLC-5 Controllers Setup 129
- DTAM Plus DeviceNet 130
- DeviceNet Operation 132
- Application Examples E–17 133
- European Union Directives 134
- Declaration of Conformity 135
- Glossary 136
- GlossaryG–2 137
- Glossary G–3 138
- GlossaryG–4 139
- Glossary G–5 140
- Worldwide representation 141
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