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Appendices
MS-9 Scanner User’s Manual A-27
Appendix J — Formulas for Number of Decodes
To ensure reliable scanning, the scanner should apply a minimum of five scans to each
symbol. Use the formulas below to predict the number of decodes that your symbol will
receive.
If the number of decodes you derive from one of these calculations is less than the min-
imum, plug in the minimum number of decodes (5) and solve for another parameter
that might be changed such as symbol speed or scans per second.
Note: While the formulas given here solve for the predicted number of decodes, you
may also use the formulas to solve for other parameters that might be changed, such
as symbol speed, symbol length, etc.
Single Line Ladder Calculation
For single scan line ladder scanning, use the following for-
mula:
1
ND (Number of Decodes) is the number of decodes that a
given symbol can be expected to achieve in a given appli
-
cation.
SH (Symbol Height) is a measurement of the height of individ-
ual bars.
SS (Symbol Speed) is the distance per second that a symbol moves through the scan.
DR (Decode Rate) is the number of scans per second that a given symbol receives (as
derived from a stationary scan test in
“Test Decode Rate” on page A-25).
Example:
1. The -3 component in the formula is included to allow for AGC acquisition, an incomplete first
scan, and an incomplete last scan. This applies only if the number inside the parentheses equals
4 or more. If the number equals 3, then only subtract 2 to derive 1 good scan.
Scan line
(full width)
Direction of label travel
Label
Label
placement
area
Figure A-9 Ladder
ND
SH
SS
--------
DR×
⎝⎠
⎛⎞
=3–
SH 1 inch=
SS 100 inches per second=
DR 900 decodes per second=
ND
1
100
---------
900×
⎝⎠
⎛⎞
=3– 6 complete decodes=
- MS-9 Scanner 1
- User's Manual 1
- Disclaimer 2
- Latest Manual Version 2
- What Is Covered? 3
- What Is Excluded? 3
- Limitation of Liability 3
- Table of Contents 4
- Chapter 7 OMR 5
- Chapter 8 I/0 Parameters 5
- Chapter 9 Diagnostics 5
- Chapter 10 Laser Control 5
- Chapter 11 Terminal Mode 6
- Chapter 12 Utilities 6
- List of Figures 7
- List of Tables 8
- About the MS-9 Scanner 9
- About This Manual 10
- Host Communications 10
- Approvals 11
- Safety Labels 11
- Warning and Caution Summary 12
- Quick Start 13
- Step 1 — Hardware Required 14
- Step 2 — Connect the System 15
- Step 3 — Install ESP 16
- Step 4 — Select Scanner Model 17
- Step 5 — Autoconnect 18
- Chapter Quick Start 19
- Step 7 — Test for Read Rate 20
- By Serial Commands 21
- By Embedded Menu 21
- Configure the Scanner 22
- Using ESP 23
- Setup Mode 24
- Application Mode 25
- Pulldown Menus 26
- Chapter 2 Using ESP 27
- Making Changes in ESP 29
- Send/Receive Options 30
- Communications 31
- Communications by ESP 32
- RS-232/422 Host Port 33
- Host Protocol 34
- Point-to-Point with RTS/CTS 35
- Polling Mode D 35
- User Defined Point-to-Point 36
- Chapter 3 Communications 37
- Host RS-422 Status 38
- RS-232 Auxiliary Port 39
- Aux Port Mode 40
- Transparent Mode 41
- Half Duplex Mode 41
- Full Duplex Mode 43
- Daisy Chain ID 44
- Preamble 45
- Postamble 46
- LRC Status 47
- Response Timeout 48
- Intercharacter Delay 48
- Read Cycle 49
- Read Cycle by ESP 50
- Read Cycle by Serial Command 51
- Multisymbol 52
- Chapter 4 Read Cycle 53
- Trigger Mode 54
- Continuous Read 1 Output 55
- External Trigger Level 56
- External Trigger Edge 57
- Serial Data 58
- Serial Data or Edge 58
- Trigger Filter 59
- Duration 59
- External Trigger State 59
- Serial Trigger 60
- End of Read Cycle 61
- Timeout or New Trigger 62
- Read Cycle Timeout 63
- Good Decode Reads 64
- Scanner Setup 65
- Automatic Gain Control (AGC) 66
- Video Settings 67
- Laser Setup 68
- Symbologies 69
- Symbologies by ESP 70
- Symbologies by Serial Command 71
- Code 39 Status 72
- Check Digit Status (Code 39) 72
- Symbol Length (Code 39) 73
- Full ASCII Set (Code 39) 74
- Code 128 75
- Interleaved 2 of 5 76
- Chapter 5 Symbologies 77
- Codabar Status 78
- Symbol Length (Codabar) 79
- Check Digit Type (Codabar) 80
- UPC/EAN Status 81
- EAN Status 81
- Separator Status (UPC/EAN) 82
- Separator Character (UPC/EAN) 83
- RSS Expanded 84
- RSS Limited 85
- RSS-14 Status 86
- Narrow Margins 87
- Symbology Identifier 88
- Background Color 89
- Autodiscriminate 90
- Matchcode 91
- Matchcode by ESP Menu 92
- Matchcode by Serial Command 92
- Overview of Matchcode 93
- Using Master Symbols 93
- Matchcode Type 94
- Sequential Matching 95
- Match Start Position 95
- Match Length 96
- Wild Card 96
- Sequence On Noread 97
- Sequence On Mismatch 98
- New Master Pin 100
- (Optical Mark Recognition) 101
- Chapter Contents 101
- OMR Setup by ESP Menu 102
- OMR Setup by Serial Command 102
- OMR Description 103
- OMR Definitions 104
- Chapter 7 OMR 105
- OMR Setup 106
- Number of Fields 107
- Trigger Delay Type 108
- Number of Scans 108
- Gate Bar Location 109
- Trigger Delay 109
- Output Style 109
- Static Test 110
- Dynamic Calibration 111
- Calibration Data 112
- Auto Frame Status 113
- Average Bar Width 113
- Average Cell Width 113
- Leading Margin 113
- Scan Count 114
- Laser Control 115
- I/0 Parameters 117
- I/O Parameters by ESP 118
- Symbol Data Output 119
- When to Output Symbol Data 121
- Noread Message 122
- Beeper Status 123
- Partial Output 124
- Serial Verification 125
- Operation Command Output 126
- Output 1 Parameters 127
- Active State 128
- Pulse Width 128
- Output Mode 129
- Trend Analysis Mode 130
- Trigger Evaluation Period 131
- Number to Output On 131
- Decodes per Trigger 131
- Output 2 Parameters 132
- Output 3 Parameters 132
- Quality Output 133
- Diagnostics 135
- Diagnostics by ESP Menu 136
- Diagnostics by Serial Command 137
- Power-on 138
- Hours Since Reset 139
- Warning Messages 140
- Laser High 141
- Laser Low 142
- Chapter 9 Diagnostics 143
- High Temperature Threshold 144
- Low Temperature Threshold 145
- Lifetime Hours 146
- Laser Control by ESP Menu 148
- Laser On/Off 149
- Laser Framing 150
- Laser Off Time 151
- Laser On Time 152
- Terminal Mode 153
- Terminal Window 154
- Find Function 155
- Editing a Macro 156
- Terminal Window Functions 157
- Utilities 159
- Utilities by ESP Menu 160
- Utilities by Serial Command 161
- Read Rate 163
- Counters 165
- Counters by Serial Command 166
- Device Control 167
- Master Database 169
- Enter Master Symbol Data 170
- Chapter 12 Utilities 171
- Request Master Symbol Data 172
- Delete Master Symbol Data 173
- Firmware 174
- By Serial Command 175
- Autodiscrimination 177
- Scanner Status Requests 178
- Appendices 179
- General Specifications 180
- FIS Options 181
- LED Indicators 182
- Electrical Specifications 184
- Optoisolator Outputs 185
- Output Circuit Examples 185
- Optoisolator Inputs 187
- IB-131 Interface Module 188
- Scanner to IB-131 189
- Multidrop 190
- Daisy Chain 190
- Serial Configuration Commands 192
- Serial Utility Commands 194
- Serial Command Status Request 195
- Appendix F — ASCII Table 196
- Appendix G — Embedded Menus 198
- Defaulting 199
- Initialize 200
- Initializing 202
- Loss of Communications 202
- Appendix I — Test Decode Rate 203
- Scan line 205
- Figure A-11 Angled 206
- Picket Fence 206
- Appendix K — Operational Tips 208
- Configure the Scanner for 210
- Polling Sequence 212
- Select Sequence 213
- Multidrop Communications 214
- Glossary of Terms 216
- MS-9 Scanner User’s Manual 222
Produits connexes et manuels pour Lecteurs de codes-barres Microscan MS-96
(34 pages)
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