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- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Formulas for Number of Decodes
MS-880 Industrial Long Range Scanner User’s Manual A-31
Appendices
Appendix M — Formulas for Number of Decodes
To ensure reliable scanning, apply a minimum of five decodes to each bar code. Use
the formulas below to calculate the number of decodes that your label will receive.
If the number of decodes you derive from one of these calculations is less than the
minimum for your application, plug in the minimum number of decodes (5) and solve
for another parameter that might be changed, such as label speed or scans per sec-
ond.
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 label speed, label length, etc.
Single Line Ladder Calculation
Ladder scanning is seldom done with raster scanning unless
the raster is set for single scan line scanning (Top Offset
setting equal to Bottom Offset) or bar codes are presented
as stop-and-go.
For single scan line ladder scanning, use the following for-
mula:
1
LH (Label Height) (ladder formula only) is a measurement of the height of individual bars.
LS (Label Speed) is the distance per second that a bar code moves through the scan.
DR (Decode Rate) is the number of decodes per second that a given bar code receives
(as derived from a stationary scan test in
Appendix L — “Test Decode Rate” on
page A-30).
Example 1:
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.
Direction of label travel
Scan Line
Figure A-7 Ladder
LH
LS
--------
DR×
3– NS (number of decodes)=
LH 1 inch=
LS 100 inches per second=
DR 900 scans per second=
ND
1
100
---------
900×
=3– 6 complete decodes=
- Industrial 1
- Long Range Scanner 1
- User's Manual 1
- Table of Contents 4
- List of Tables 9
- About This Manual 10
- Host Communications 10
- Keystrokes 11
- Approvals 11
- Safety Labels 12
- Warning and Caution Summary 13
- Quick Start 15
- Step 1 — Hardware Required 16
- Step 2 — Connect the System 17
- 1–Quick Start 18
- Chapter 1 Quick Start 19
- Step 3 — Install ESP-MP 20
- Step 4 — Select Scanner Model 21
- Communications 31
- Communications Options 32
- Communications 33
- Communications by ESP 33
- 2–Communications 34
- Host Port Parameters 35
- Data Bits, Host Port 36
- RS422 Status 37
- Auxiliary Port 38
- Tra ns par en t Mo d e 39
- Half Duplex Mode 40
- Full Duplex Mode 41
- Daisy Chain Mode 42
- Command Processing Mode 43
- Baud Rate, Aux Port 44
- Parity, Aux Port 44
- Data Bits, Aux Port 44
- Daisy Chain Autoconfigure 46
- Daisy Chain Remote Scanner ID 47
- IrDA Port 48
- Menu Mode 49
- Protocol 51
- Protocol by ESP 52
- Protocol by Serial Command 52
- Protocol 53
- Protocol by Embedded Menu 53
- Point-to-Point with RTS/CTS 55
- Polling Mode D 55
- Multidrop 56
- User Defined Point-to-Point 56
- User Defined Multidrop 58
- Response Timeout 60
- Intercharacter Delay 61
- Output Data Format 62
- Postamble Characters 63
- Auxiliary Status 64
- Configuration Status 64
- Network Client 65
- 3–Protocol 66
- Read Cycle/Trigger 67
- Read Cycle/Trigger by ESP 68
- Read Cycle/Trigger 69
- Trigger Mode 70
- Continuous Read 1 Output 71
- External Trigger Level 72
- External Trigger Edge 73
- Serial Data 74
- Serial Data or External Edge 74
- Network Trigger 74
- Trigger Filter Duration 75
- Good Decode Reads 75
- Serial Trigger 76
- External Trigger State 78
- End of Read Cycle 79
- 4–Read Cycle/Trig 80
- Timeout Duration 81
- Multilabel 82
- Multilabel Separator 83
- Code Types by ESP 86
- Code Types by Serial Command 87
- Code Types by Embedded Menu 88
- Narrow Margins 89
- Symbology ID 90
- Background Color 91
- Code 39 Status 92
- Check Digit Status (Code 39) 92
- Check Digit Output (Code 39) 92
- Fixed Code Length (Code 39) 93
- Full ASCII Set (Code 39 94
- Codabar Status 95
- Fixed Code Length (Codabar) 96
- Check Digit Type (Codabar) 97
- Check Digit Output (Codabar) 97
- Interleaved 2 of 5 100
- UPC Status 101
- EAN Status 101
- Separator Status (UPC/EAN) 102
- Separator Character (UPC/EAN) 103
- Supplementals Type (UPC/EAN) 103
- PDF417 Status 104
- Fixed Code Length (PDF417) 104
- (PDF417) 105
- Code 128 106
- UCC/EAN-128 107
- Chapter 5 Codes 109
- Code 93 Status 110
- Fixed Code Length (Code 93) 110
- Pharma Code 111
- Bar Widths (Pharma Code) 112
- Autodiscriminate 113
- Autocalibration 115
- Overview of Autocalibration 116
- Autocalibration 117
- Autocalibration Steps 117
- Autocalibration by ESP 118
- 6–Autocalibration 120
- Auto Range 120
- Scanner Settings 123
- Autocalibration Menu Options 124
- Calibration 127
- Database 127
- 7–Calibration Data 128
- Calibration with Multilabel 128
- Calibration Database by ESP 129
- Database Index 130
- Focus Position 130
- Tra ck in g 130
- Calibration Database 131
- Request Database Settings 131
- Optoelectrics 133
- Optoelectric by ESP 134
- Optoelectrics 135
- Overview of Optoelectrics 136
- Optoelectric Database Modes 137
- Timer Mode 138
- Automatic/Static Mode 138
- Control Trigger Mode 139
- 8–Optoelectrics 140
- Control Trigger #1 141
- Control Trigger #2 141
- Control Trigger #3 141
- Latch on Trigger 142
- Timer Value 143
- Raster/Laser 145
- Raster Setup 147
- Bottom Offset 148
- Raster/Laser Control 149
- Raster Sweep Rate 149
- Laser Setup 150
- Laser Framing Status 151
- Laser Off Time 152
- Laser On Time 152
- Laser Power 152
- Raster/Laser by Embedded Menu 153
- Scanner Setup 155
- Scanner Setup by ESP 156
- Scanner Setup 157
- Scan Speed 158
- Zero Position 159
- Gain Adjustment 160
- Tracking 160
- Transition Counter 161
- Maximum Element 162
- Matchcode 163
- Matchcode by ESP 164
- Matchcode by Serial Command 164
- Matchcode 165
- Matchcode by Embedded Menu 165
- Overview of Matchcode 166
- Matchcode Type 167
- Sequential Matching 168
- Match Start Position 168
- Match Length 169
- Wild Card Character 169
- Sequence On Noread 170
- Sequence On Mismatch 171
- 11–Matchcode 172
- Sequence Step 172
- Master Label Database 173
- Enter Master Label Data 174
- Request Master Label Data 175
- Request All Master Label Data 175
- Delete Master Label Data 176
- New Master Pin 178
- 12–Outputs 179
- Chapter Contents 179
- Outputs by Serial Command 180
- Outputs by Embedded Menu 180
- Outputs 181
- Output Data by ESP Menu 181
- Noread Message 182
- Bar Code Output 183
- When to Output Bar Code Data 184
- Serial Verification 186
- Control/Hex Output 187
- Beeper Status 188
- Quality Output 189
- Output Format 191
- 13–Output Format 192
- Output Format and Filtering 193
- Output Format Status 194
- Extraction Mode 195
- Extraction by Serial Command 196
- Insertion Mode 197
- Insertion by Serial Command 198
- Advanced Output Format by ESP 199
- Output Format Status by ESP 200
- Ordered Output/Filtering 201
- Filter # 202
- Code Type 202
- Number of Filters 204
- Master Database in ESP 206
- Discrete I/0 207
- Discrete I/O by ESP Menu 208
- Discrete I/0 209
- Input Mode 210
- Active State 210
- Output 1 211
- Pulse Width 212
- Output Mode 213
- Trend Analysis Mode 214
- Trigger Evaluation Period 215
- Number Before Output 215
- Reads per Trigger Threshold 215
- Output 2 216
- Output 3 216
- Diagnostic Outputs 217
- 14–Discrete I/0 218
- Diagnostics 219
- Diagnostics by ESP Menu 220
- Diagnostics by Serial Command 220
- Diagnostics 221
- Diagnostics by Embedded Menu 221
- Warning Messages 222
- Laser High Warning 223
- Laser Low Warning 224
- NOVRAM Corrupt Warning Status 225
- High Temperature Threshold 226
- Low Temperature Threshold 227
- Lifetime Hours 228
- Powerups 230
- Time Since Last Reset 231
- 15–Diagnostics 232
- Wiring Box Option 233
- Wiring Box Description 234
- Installation Steps 235
- 16–Wiring Box 236
- Wiring Box Ports 237
- Chapter 16 Wiring Box Option 239
- Figure 16-7 Wiring Box PCB 240
- Mounting Plate 241
- Utilities 243
- Utilities by ESP Menu 244
- Utilities 245
- Utilities by Serial Command 245
- 17–Utilities 246
- File Transfer 247
- Counters 248
- Part Number 250
- Checksum 251
- Read Rate 252
- Device Control 254
- Appendices 257
- Centerline of scan window 258
- , IrDa port** 259
- Table A-1 MS-880 FIS Options 259
- Table A-2 MS-880 Read Ranges 259
- Appendix A 260
- Mounting Specifications 260
- LED Indicators 260
- General Specifications 261
- Safety Certifications 261
- Appendix B 262
- Pin Assignments 262
- Electrical Specifications 263
- Optoisolator Outputs 265
- Optoisolator Inputs 267
- IrDA Configuration Port 269
- Serial Menu: 269
- IrDA Status 269
- Appendix C 270
- IR Timeout 270
- Embedded Menu Mode 270
- IrDA/Ir Comm for Palm Pilot 271
- Obtaining the drivers: 271
- Installing the drivers: 271
- Appendix E 272
- Serial Configuration Commands 273
- Serial Command Format 275
- Serial Utility Commands 275
- Control Characters 276
- Appendix G — ASCII Table 277
- Appendix G 278
- Appendix H — Embedded Menus 279
- Defaulting 280
- Appendix I 282
- Initializing 283
- Loss of Communications 283
- Appendix J 284
- Position Object Detector 285
- With a Static Label 286
- Number of Decodes 286
- With a Moving Label 286
- Direction of label travel 287
- Scan Line 287
- Raster pattern 288
- Appendix M 290
- Appendix N — Operational Tips 291
- Interface Standards 293
- ProfiBus DP 293
- Modicon Ethernet 293
- Appendix P 294
- Multidrop Communications 295
- Polling Sequence 296
- Select Sequence 297
- Glossary of Terms 299
- Appendix Q 300
- Numerics 305
- Tracking 7-4, 10-6, A-34 311
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