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Chapter 11 Loops and Charts
BridgeVIEW User Manual 11-2 © National Instruments Corporation
Charts
A chart is a numeric plotting indicator which is updated with new data
periodically. You can find two types of charts in the Controls»Graph
palette: waveform chart (or real-time trend) and intensity chart. You can
customize charts to match your data display requirements or to display
more information. Features available for charts include: a scrollbar, a
legend, a palette, a digital display, and representation of scales with respect
to time. For more information about charts, see Chapter 15, Graph and
Chart Controls and Indicators, in your G Programming Reference
Manual.
Chart Modes
The following illustration shows the three chart display options available
from the Data Operations»Update Mode submenu—Strip chart,
Scope chart, and Sweep chart. The default mode is strip chart.
- User Manual 1
- Important Information 3
- Chapter 2 5
- Chapter 3 5
- Chapter 4 7
- Chapter 5 8
- Chapter 6 8
- Chapter 7 9
- Chapter 8 10
- Contents 11
- Activities 16
- About This Manual 17
- G Tutorial 18
- C:\dir1name\dir2name\filename 20
- Related Documentation 21
- Customer Communication 21
- BridgeVIEW Concepts 22
- Part I BridgeVIEW Concepts 23
- Introduction 24
- Required System Configuration 25
- Installation 25
- What Is BridgeVIEW? 26
- How Does BridgeVIEW Work? 26
- G Programming 27
- Tag Configuration 28
- Data Type 28
- Connection 29
- Operations 29
- Security 30
- User HMI Application 31
- BridgeVIEW Engine 32
- Device Servers 32
- Where Should I Start? 33
- Examples 34
- BridgeVIEW Environment 35
- Virtual Instruments 36
- Icon/Connector 37
- Tools Palette 38
- Controls Palette 39
- Functions Palette 39
- Controls and Indicators 40
- Tank Simulation.vi 42
- End of Activity 2-1 44
- Table 2-1 45
- Table 2-2 47
- BridgeVIEW\Syslog 48
- Figure 2-2 48
- Figure 2-3 49
- What Is the Tag Browser? 50
- Table 2-3 51
- What Is the Tag Monitor? 52
- Figure 2-5 53
- Tag Monitor Utility 53
- Table 2-4 54
- Figure 2-6 55
- Status Details Dialog Box 55
- Figure 2-7 55
- Figure 2-8 56
- Simple/Complex Help View 57
- Links to Online Help Files 58
- General Attributes 60
- Connection Attributes 60
- Operation Attributes 60
- Scaling Attributes 60
- Alarm Attributes 61
- Static vs. Dynamic Attributes 61
- How Do You Create a Tag? 63
- How Do You Edit a Tag? 63
- How Do You Delete a Tag? 63
- What are Network Tags? 64
- How Do You Add Network Tags? 65
- How Do You Configure Tags? 68
- String Tags 69
- Figure 3-5 71
- Tag Connection Dialog Box 71
- I/O Group Configuration 72
- Figure 3-6 73
- Server Configuration Options 74
- Item Configuration 76
- What Is a Memory Tag? 77
- Table 3-4 81
- What Is Deadband? 82
- How Do You Use Deadband to 82
- IncreaseEngineThroughput? 82
- How Do You Configure a Tag 83
- Analog Tags 85
- Discrete Tags 86
- Bit Array Tags 87
- Figure 3-10 88
- Table 3-6 88
- Bit Array Scaling Examples 88
- Table 3-7 90
- Auto Ack on Normal 95
- Tag Configuration Parameters 96
- BridgeVIEW\Activity\Solutions 100
- User must Ack 100
- Table 3-11 100
- End of Activity 3-1 101
- How Do You Configure Shifts? 102
- Table 3-12 103
- Chapter 3 Tag Configuration 104
- Human Machine Interface 105
- How Do You Build an HMI? 106
- Front Panel Objects 107
- HMI G Wizard 107
- Table 4-1 108
- HMI G Wizard Operations 108
- Figure 4-1 111
- HMI G Wizard Dialog Box 111
- Generate the Block Diagram 112
- Subdiagram Association 112
- BridgeVIEW\Activity 113
- Real-Time Trend 113
- End of Activity 4-1 115
- Control Editor 116
- BridgeVIEW 117
- End of Activity 4-2 119
- Tag Data Type 121
- Activity 4-3. Read a Tag 125
- Block Diagram 126
- End of Activity 4-3 128
- Figure 4-4 132
- Process View Display VI 132
- Tank Temperature 133
- Trend Tank Level 133
- Figure 4-5 134
- Two Trend Display VI 134
- Figure 4-6 134
- Figure 4-7 136
- Figure 4-8 137
- Alarms and Events 138
- Alarm Priority 139
- Alarm Summary 139
- Event History 139
- Chapter 5 Alarms and Events 140
- <ALL> 141
- End of Activity 5-1 142
- Alarm Summary Display 144
- End of Activity 5-2 146
- How Do You Configure Logging 147
- Historical Data Logging 152
- Historical Data VIs 155
- BridgeVIEW\Activity\Data 157
- End of Activity 6-1 160
- Panning Buttons 162
- Manual Changes 162
- How Do You Change the Y Axis? 163
- Has Been Logged to Citadel? 165
- BridgeVIEW\ 166
- Activity\Data 166
- End of Activity 6-2 168
- Advanced Application Topics 169
- Figure 7-1 170
- Panel G Wizard 170
- Will Be Polled? 171
- My Menu Bar.vi 172
- My Alarm Summary with Ack.vi 172
- End of Activity 7-1 173
- Virtual Instrument 174
- BridgeVIEW System Control 175
- Tag Attributes VIs 177
- <none> 179
- HI Limit 179
- End of Activity 7-2 180
- BridgeVIEW Security 181
- Table 7-1 182
- How Do You Log In and Out? 183
- Figure 7-3 184
- Privileges Dialog Box 184
- Figure 7-4 186
- Edit User Accounts Dialog Box 186
- Figure 7-5 186
- Add a User Account 186
- How Do You Modify the List 187
- How Do You Export Users to 188
- How Do You Import Users from 189
- Environment Privileges? 190
- Operator Interface Security 190
- Figure 7-6 191
- Summary Display 192
- Administrator 193
- Administration 193
- My Alarm Summary With Ack.vi 193
- Alarm Summary with Ack.vi 193
- End of Activity 7-3 195
- Chapter 8 Servers 197
- Figure 8-1 201
- Server Browser 201
- Figure 8-2 201
- Using Remote OPC Servers 202
- Figure 8-4 205
- Figure 8-5 206
- Creating VIs 209
- BridgeVIEW\Activity\Solution 210
- Terminals 211
- Tip Strips 212
- Wire Stretching 213
- Selecting and Deleting Wires 213
- Bad Wires 214
- Activity 9-1. Create a VI 215
- Activity 216
- End of Activity 9-1 217
- Activity 9-2. Document a VI 218
- Chapter 9 Creating VIs 219
- End of Activity 9-2 220
- What is a SubVI? 220
- Search Hierarchy 222
- Icon and Connector 222
- Temp & Vol.vi 225
- End of Activity 9-3 226
- Activity 9-4. Call a SubVI 227
- End of Activity 9-4 228
- How Do You Debug a VI? 229
- Using Temp & Vol.vi 230
- Tank Volume 230
- End of Activity 9-5 231
- Customizing VIs 232
- Front Panel 233
- Get Operator Info.vi 235
- Chapter 10 Customizing VIs 236
- End of Activity 10-1 239
- Loops and Charts 240
- Chart Modes 241
- End of Activity 11-1 242
- While Loops 243
- End of Activity 11-2 246
- Random Signal.vi 247
- End of Activity 11-3 248
- End of Activity 11-4 249
- Shift Registers 250
- Chapter 11 Loops and Charts 251
- End of Activity 11-5 254
- Customize Your Trends 256
- End of Activity 11-6 259
- For Loops 259
- Numeric Conversion 260
- Activity 11-7. Use a For Loop 261
- End of Activity 11-7 263
- Case and Sequence Structures 264
- Case Structure 265
- End of Activity 12-1 267
- Sequence Structures 268
- Modifying the Numeric Format 269
- Setting the Data Range 270
- End of Activity 12-2 273
- Formula Node 274
- End of Activity 12-3 278
- Artificial Data Dependency 278
- Front Panel Object Attributes 279
- End of Activity 13-1 282
- Arrays, Clusters, and Graphs 283
- Auto-Indexing 284
- Multiplot Graphs 288
- End of Activity 14-1 289
- Input Array 290
- End of Activity 14-2 291
- Initialize Array 292
- Array Size 293
- Array Subset 294
- Index Array 295
- Extract Column 296
- Extract Row 296
- End of Activity 14-3 298
- What is Polymorphism? 299
- Clusters 299
- Customizing Graphs 300
- Graph Cursors 301
- Graph Axes 302
- Data Acquisition Arrays 302
- End of Activity 14-4 304
- Intensity Plots 305
- Application Control 306
- What is the VI Server? 307
- End of Activity 15-1 312
- Program Design 313
- Chapter 16 Program Design 314
- Create the Program 315
- Good Diagram Style 316
- Use Left-to-Right Layouts 317
- Check for Errors 317
- Study the Examples 320
- HMI Function Reference 321
- BridgeVIEW VI Library 323
- Alarms and Events VIs 324
- Acknowledge Alarm 325
- Get Alarm Summary Status 326
- Read Alarm Summary 327
- Read Event History 331
- Read Tag Alarm 335
- Call HTV 338
- Decimate Historical Trend 340
- Decimate Historical Trends 341
- Get Historical Tag List 343
- Get Historical Trend Info 344
- Historical Trend Statistics 345
- MM/DD/YYYY 347
- DD/MM/YYYY 347
- Read Historical Trend 351
- Read Historical Trends 353
- System VIs 355
- Enable Event Logging 356
- Enable Printing 358
- Engine Launch 359
- Engine Shutdown 360
- Get Engine Status 361
- Get Tag Status Info 362
- Post System Error or Event 363
- Tag Status Handler 364
- Security VIs 366
- Check Operator Privileges 367
- Get Operator Name 368
- Invoke Login Dialog 369
- Programmatic Login 370
- Programmatic Logout 371
- Security Monitor 372
- User Account List 373
- Tags VIs 373
- Read Tag 374
- Read Tag (bit array) 376
- Read Tag (discrete) 378
- Read Tag (string) 380
- Trend Tags 382
- Write Tag 383
- Write Tag (bit array) 384
- Write Tag (discrete) 385
- Write Tag (string) 386
- Write Tag on Change 387
- Write Tag on Change (string) 390
- Get Analog Tag Alarm Limit 392
- Get Group List 395
- Get Tag Alarm Enabled 396
- Get Tag Attribute 397
- Get Tag Bad Status Alarm Info 398
- Get Tag Description Group 399
- Get Tag I/O Connection Info 400
- Get Tag List 401
- Get Tag Logging Info 402
- Get Tag Range and Units 403
- Set Multiple Tag Attributes 404
- Set Tag Attribute 405
- Citadel and Open Database 406
- Connectivity 406
- System\Data 407
- What is SQL? 408
- Threads Table 409
- Data Transforms 409
- Table B-1 410
- Data Transform Commands 410
- SQL Examples 411
- >= "9:45" 415
- FROM Threads 417
- Telephone and Fax Support 421
- Technical Support Form 422
- National Instruments Products 423
- Other Products 423
- Documentation Comment Form 424
- Glossary 425
- For i = 0 to n – 1, do 428
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