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14–1
Chapter
14 Creating expressions
This chapter includes:
instructions for creating expressions
description of the components used for building expressions
About expressions
Sometimes the data you gather from devices is only meaningful when
you:
compare it to other values
combine it with other values
create a cause–effect relationship with other values
Expressions allow you to create mathematical or logical combinations
of data that return more meaningful values.
Expression components
Expressions can be built from:
tag values
constants
mathematical, relational, logical, and bitwise operators
built–in functions
if–then–else
logic
- RSView 32 1
- Contents 3
- Chapter 2 4
- Creating tags 5
- Configuring alarms 7
- Configuring data logging 9
- RSView32 User’s Guide 10
- Configuring activity logging 11
- Configuring events 12
- Adding security 12
- Contents xi 13
- Creating graphic displays 14
- Contents xiii 15
- Animating graphic objects 17
- Configuring trends 19
- Creating expressions 20
- Setting up navigation 21
- Sharing data with other 22
- Windows applications 22
- Using networks 23
- Running your project 24
- RSView32 commands 24
- System tags 25
- Differences between RSView32 25
- Appendix D 26
- Appendix E 26
- Appendix F 26
- P Preface 27
- Technical support services 28
- 1 Working with projects 29
- Project files 30
- Working with projects 1–3 31
- Tgs Tag monitor files .tgs 31
- Vba VBA program files .vba 31
- Component 32
- Viewing component locations 32
- Working with projects 1–5 33
- Renaming a component 35
- Naming files 36
- Printing 37
- Selecting a printer 38
- Using the Project Documentor 39
- 2 Setting up direct driver 41
- Communication channel 42
- Communication device 42
- Communication driver 43
- Node (control device) 43
- Configuring RSLinx drivers 45
- Using the drivers 46
- Configuring channels 47
- 2–8 RSView32 User’s Guide 48
- To Select 48
- IMPORTANT 49
- Active Driver 51
- Creating a node 53
- Scanning for new tag values 57
- RSView32 scan classes 58
- To configure a scan class: 59
- Monitoring communications 60
- 3 Setting up OPC and 63
- OPC for communications 65
- DDE for communications 66
- Creating an OPC node 67
- Use this syntax For this 71
- Creating a DDE node 74
- To create a DDE node: 75
- 4 Creating tags 81
- Tag types 82
- Data sources 83
- Organizing tags 83
- Naming tags 84
- Using folders to group tags 84
- The tag database editor 85
- Using the form 86
- Using the query box 86
- Using the folder hierarchy 87
- Opening a folder 88
- Adding tags to a folder 89
- Nesting a folder 89
- Duplicating a folder 90
- Using the spreadsheet 91
- Adding a tag 92
- Duplicating a tag 92
- Editing a tag 92
- Configuring tag type 93
- Creating tags 4–15 95
- The data types are: 96
- Configuring a digital tag 97
- Configuring a string tag 98
- Specifying a data source 99
- RSView32 User’s Guide 100
- Creating tags 4–21 101
- Creating tags 4–23 103
- Using the Tag Browser 104
- Creating tags 4–25 105
- Importing ControlLogix tags 107
- Adding alarms to tags 108
- Logging tag values 109
- Using the tag monitor 109
- Creating a tag monitor object 110
- Creating a tag monitor file 111
- Selecting tags 111
- Click OK 113
- Understanding what you see 114
- Changing what you see 115
- Viewing details 117
- 5 Creating derived tags 119
- Summary of steps 120
- The Derived Tags editor 121
- Creating derived tags 123
- Editing derived tags 124
- Creating derived tags 5–7 125
- 6 Configuring alarms 127
- Key concepts 128
- Example: Alarm thresholds 129
- Configuring alarms 6–5 131
- Alarms for digital tags 133
- Alarm severity 133
- Alarm messages 134
- Alarm log file 134
- Alarm displays 135
- Alarm system tags 137
- Alarm acknowledgment 138
- Alarm suppression 139
- Alarm expressions 141
- ALM_IN_ALARM (tag) 142
- ALM_ACK (tag) 142
- ALM_ALLACKED (tag*) 142
- Configuring alarms 6–17 143
- ALM_IN_ALARM (alarm*) 143
- Handshake bit 144
- Alarm events 145
- Configuring alarms 6–21 147
- The Alarm Setup editor 149
- Creating log files 151
- Monitoring disk space 152
- Creating files periodically 153
- Example: Creating a new file 154
- Deleting log files 155
- About alarm log files 157
- Example: Log file name 158
- Configuring alarm severity 159
- Alarm Severities 160
- Alarm Incidents 160
- Configuring alarms 6–35 161
- Configuring alarm messages 162
- Configuring alarms 6–37 163
- Example: Message placeholders 164
- Configuring alarms 6–39 165
- Configuring alarms 6–41 167
- Alarm thresholds 169
- Advanced 172
- Configuring alarms 6–47 173
- Alarm states 174
- Configuring alarms 6–49 175
- Viewing the alarm log file 179
- Creating an alarm summary 180
- Configuring alarms 6–55 181
- The parts of an alarm summary 182
- Inserting headings 183
- The fonts listed here 185
- Windows 185
- Blink colors appear 186
- Formatting buttons 187
- 6–62 RSView32 User’s Guide 188
- Does this 188
- Changing the button text 189
- Choosing data 190
- Filtering data 190
- You can use 191
- #1 = bean_weight 192
- #2 = bean_level 192
- #3 = bean_temp 192
- Display Canning /PBeans 192
- Sorting data 193
- Configuring alarms 6–69 195
- Suppressing alarm printing 196
- Suppressing alarm monitoring 197
- Using the Suppressed List 198
- Viewing suppressed tags 198
- Click a tag name and 199
- Click here to turn off 199
- Ways to stop alarm monitoring 200
- 7 Configuring data 201
- The .dbf file format 203
- 7–4 RSView32 User’s Guide 204
- Narrow Wide 204
- How .dbf log files are named 205
- Long file names 205
- Example: Long file name 206
- Short file names 206
- The ODBC storage format 208
- How ODBC tables are named 209
- The Data Log Setup editor 211
- Setting up a model 211
- Digits After Decimal Point 213
- Setting up logging paths 220
- Specifying logging paths 222
- Relative To Project 223
- Absolute Path 223
- Creating .dbf log files 227
- Never creating new files 230
- After Maximum Time 233
- After Maximum Files 233
- Specifying when to log data 235
- Logging periodically 236
- Logging on change 236
- Logging on demand 237
- DataLogSnapshot <file> 238
- Combining logging 239
- Choosing the data to log 240
- Editing the data log model 241
- DataLogPath command 242
- Displaying data in a trend 244
- Ways to start data logging 245
- Ways to stop data logging 245
- 8 Configuring activity 247
- The Activity Log Setup editor 248
- By default, activity 250
- About activity log files 256
- UDerek /Pgolf 258
- This activity 259
- Editing activity log setup 261
- Using the activity bar 261
- Activity 262
- Status bar 262
- Using the Activity Log Viewer 263
- Selecting a record 264
- to resize columns 265
- Ways to stop activity logging 266
- 9 Configuring events 268
- The Events editor 269
- Configuring events 9–3 270
- Creating events 271
- Configuring events 9–5 272
- Editing events 273
- Ways to stop event processing 274
- 10 Adding security 275
- Security function 276
- Electronic signatures 276
- Security Monitor utility 276
- Adding security 10–3 277
- Before you begin 278
- Configuring security codes 278
- Security codes 279
- The default 279
- Using strict security 281
- Turning off strict security 282
- Select a 283
- Select a security code 285
- Configuring user accounts 286
- About the default user 287
- Creating user accounts 287
- Login and logout macros 289
- Securing the Project Manager 290
- Logging in at runtime 291
- Changing passwords at runtime 292
- The new 293
- 11 Creating graphic 294
- The Graphic Display editor 295
- Mastering basic techniques 296
- Using the toolbars 297
- A toolbar 298
- Toolbars that 298
- Selecting a drawing tool 299
- Selecting colors 300
- Using the grid 301
- Using the Rotate tool 302
- Zooming in and out 304
- Correcting mistakes 304
- Setting up the display 305
- Creating a default 306
- Specifying the display type 307
- Specifying caching 309
- Title Bar 310
- Specifying display size 313
- Specifying resize behavior 313
- Specifying display position 314
- Specifying a security code 315
- Specifying background color 315
- Beep on Press 318
- Types of graphic objects 321
- Creating simple objects 322
- Drawing a rectangle or square 323
- Drawing an ellipse or circle 323
- Drawing a line 323
- Drawing a polyline or polygon 324
- Drawing a freehand object 325
- Drawing an arc or wedge 325
- Creating text 326
- Font substitution at runtime 327
- Reshaping simple objects 328
- Creating advanced objects 329
- Using tag placeholders 330
- Display Canning /TCorn 334
- Display Canning /TBean 334
- 3. Release the mouse button 336
- 5. Click OK 338
- In this field Do this 338
- Using input fields at runtime 339
- Using the on–screen keyboard 342
- Creating labels 347
- Creating arrows 348
- Creating buttons 350
- Editing a button object 354
- Reshaping a button object 354
- Creating a recipe field 354
- Creating a recipe file 355
- Using a recipe at runtime 358
- Converting OLE objects 364
- Using the ActiveX Toolbox 369
- This page 370
- setting a tag value 372
- issuing an RSView command 372
- Creating signature buttons 373
- When you click an option 376
- … the options displayed 376
- Naming graphic objects 379
- Working with objects 380
- Copying objects 381
- Duplicating objects 383
- Resizing objects 384
- Arranging objects 385
- To group objects: 386
- Performing group editing 387
- Stacking objects 388
- Aligning objects 390
- Spacing objects 392
- Flipping objects 393
- Applying colors 394
- Applying fill patterns 395
- Changing line properties 396
- Peeking at objects 398
- To turn Peek on and off: 400
- 4. Click Open 402
- Using bitmaps 403
- When could a bitmap help? 404
- Using graphic libraries 405
- Printing displays at runtime 406
- 12 Animating graphic 408
- Expression Result 412
- Minimum and Maximum Values 412
- Testing animation 413
- Using commands and macros 414
- Using expressions 415
- Defining a range of motion 416
- Configuring color animation 420
- The parts of the list box 421
- 8. Click Apply 422
- 2. Select the text 422
- Create the expression 424
- Configuring fill animation 425
- 7. Click Apply 428
- 1. Select the object 428
- Configuring width animation 429
- Configuring height animation 431
- 6. Click an anchor point 432
- Rotate too 434
- Configuring touch animation 435
- 5. Click Apply 436
- Configuring ActiveX control 440
- Naming an ActiveX object 442
- Creating object keys 449
- Example: Using object keys 450
- Using index numbers 452
- Changing index numbers 453
- Creating a tab sequence 454
- Examples 457
- Type the name of the 458
- Help [tag] 459
- Display AlmSumm /t[tag] 460
- Creating display keys 461
- To create a display key: 462
- 2. Click Add 462
- Modifying a key 464
- Removing a key 464
- Removing all keys 464
- Disabling the key list 465
- Applying animation to groups 466
- Using Peek 468
- 3. Make the required changes 470
- 4. Click Apply 470
- 13 Configuring trends 472
- Data source 474
- Control tags 475
- Creating a trend object 476
- Trend configuration 478
- Example: Relative Time 480
- Configuring trends 13–11 482
- Configuring the vertical axis 483
- Choosing a data source 484
- Configuring control 486
- Creating a legend 487
- Configuring trends 13–17 488
- Pen configuration 489
- Configuring pen style 490
- This item Does this 491
- Configuring pen scale 492
- Configuring shading 493
- Configuring trends 13–23 494
- Pen 1 VIN_LEVEL Pen 2 Pen 3 494
- Pen 2 75 494
- Pen 3 25 494
- Pen 1 VIN_LEVEL Pen 2 495
- Pen 2 OIL_LEVEL 495
- Display Trend1 /ZA 497
- Display Trend1 497
- Creating control for a trend 498
- Trend control tags 499
- StartTime 501
- NewestTime 501
- To Use this expression 502
- Masking pens 503
- Specifying a start time 505
- Configuring trends 13–35 506
- Display “Process Trend” 506
- 7. Click Replace 508
- To choose Do this 508
- Using the trend at runtime 510
- Selecting points 511
- Editing a trend 512
- 14 Creating expressions 514
- Where you can use expressions 515
- Expression buttons 517
- Creating expressions 14–5 518
- Formatting expressions 519
- Using the = (Equal) command 519
- Creating expressions 14–7 520
- Tag1 = Tag1 + 1 520
- Tag1 = Tag2 520
- 14–8 RSView32 User’s Guide 521
- Constants 522
- Arithmetic operators 523
- Relational operators 524
- Logical operators 525
- Bitwise operators 525
- Creating expressions 14–13 526
- Built–in functions 527
- Tag functions 528
- Example: Tag functions 529
- Time functions 529
- This function Returns 530
- Creating expressions 14–19 532
- BEFORE_TIME(“aug 18 1997”) 532
- File functions 533
- Math functions 534
- Evaluation order of operators 535
- Example: Evaluation order 536
- If–then–else 537
- Nested if–then–else structure 538
- This expression: 539
- 15 Setting up navigation 541
- RSView32 543
- Function 543
- Reducing display call–up time 544
- Example of navigation methods 545
- The tools 547
- Creating macros 547
- Using parameters 550
- Nesting macros 550
- Creating symbols 551
- Example: The Define command 552
- Important guidelines 552
- Key definitions 553
- Precedence and the F1 key 555
- Reserved keys 557
- This reserved key Does this 558
- Creating global keys 559
- Setting up navigation 15–21 561
- Running global key files 562
- 16 Sharing data with other 563
- Retrieving historical data 565
- RSView32 User’s Guide 566
- 5. Select a .dbf file 567
- 7. Click OK 567
- Activity log files 569
- Activity log—ODBC format 570
- Alarm log files 571
- This column Contains 572
- Alarm log files—ODBC format 573
- Tag name 576
- Data log—ODBC format 579
- Selecting the data source 582
- 2. Click Get Data 583
- Organizing the pivot table 586
- Creating a chart 587
- Sharing tag values locally 588
- =RTData 590
- Example: Writing to a tag 591
- 17 Using networks 593
- Sharing components at runtime 594
- How to share components 595
- LogModel.dlg 596
- Using networks 17–5 597
- Using networks 17–7 599
- Configuring RSLinx Gateway 601
- RSLinx OPC Server or 602
- RSLinx Remote OPC Server 602
- Using networks 17–11 603
- PLC_HVAC1 603
- [PLC_HVAC1]N7:12 603
- 18 Running your project 605
- Preferences 607
- Running your project 18–5 609
- Click the Startup tab 610
- Running your project 18–7 611
- Setting the project path 612
- Running your project 18–9 613
- Changing application paths 614
- Running your project 18–11 615
- Changing the database path 616
- Running a project 617
- Stopping a project 619
- A RSView32 commands 621
- RSView32 commands A–3 623
- Display Screen$Tag1$ 623
- Display $Tag3$$Tag2$ 623
- Valve23 = Open 623
- Precedence 624
- Using the command line 625
- Using the Command Wizard 625
- Building a command string 626
- RSView32 commands A–7 627
- Abort [parameter] 629
- Examples: The Abort command 630
- RSView32 commands A–11 631
- Acknowledge Hopper1\Flow 631
- Acknowledge Hopper1\* 631
- Acknowledge * 631
- Acknowledge [tag] 632
- RSView32 commands A–13 633
- RSView32 commands A–15 635
- RSView32 commands A–17 637
- RSView32 commands A–19 639
- Example: The AppAbort command 640
- RSView32 commands A–21 641
- RSView32 commands A–23 643
- RSView32 commands A–25 645
- Examples: The Define command 648
- RSView32 commands A–29 649
- RSView32 commands A–31 651
- Examples: The Display command 652
- RSView32 commands A–33 653
- RSView32 commands A–35 655
- RSView32 commands A–37 657
- Identify Hopper1\Divider 658
- Identify [tag] 658
- Identify 658
- RSView32 commands A–39 659
- RSView32 commands A–41 661
- Examples: The Monitor command 662
- RSView32 commands A–43 663
- Monitor Bread 663
- RSView32 commands A–45 665
- RSView32 commands A–47 667
- RSView32 commands A–49 669
- Examples: The Ramp command 670
- RSView32 commands A–51 671
- RSView32 commands A–53 673
- Examples: The Set command 676
- RSView32 commands A–57 677
- Set Valve\23 open 677
- Set Hopper1\Level Preset 677
- Set String\string1 “open” 677
- RSView32 commands A–59 679
- Example: The Undefine command 680
- RSView32 commands A–61 681
- B System tags 682
- Communications 683
- Graphics 685
- B–6 RSView32 User’s Guide 687
- Windows memory resources 689
- C Differences between 690
- Alarm log 691
- Alarm summary 691
- Commands 692
- Renamed commands 693
- Data log 694
- Derived tags 694
- Global keys 695
- Scan classes 696
- SLC addressing syntax 696
- Tag database 697
- D Addressing syntax for 699
- PLC addressing syntax 700
- PLC–3 data table sections 701
- PLC–3 timers and counters 702
- Example: B3/1024 703
- PLC–5 I/O and status files 704
- Example: B27/248 708
- SLC 5 status files 712
- (optional) File number: 713
- (optional) Bit number: 716
- SLC 5 (Enhanced) I/O files 717
- SLC 5 (Enhanced) status files 717
- ASCII, and string files 718
- (optional) Bit number: 722
- SoftLogix 5 addressing syntax 724
- Example: B4095/65308 726
- Mnemonic tables 728
- Control mnemonics 729
- PID mnemonics 730
- Message mnemonics 732
- Block transfer mnemonics 733
- Token data mnemonics 733
- SFC status mnemonics 734
- E Station addressing for 735
- Remote station addressing 736
- 1785–KA5 740
- Pyramid Integrator 741
- F Importing and 748
- Editing XML files 749
- Importing XML files 749
- Importing graphic XML file 750
- F–4 RSView32 User’s Guide 751
- Element Description 751
- Numerics 752
- I–2 RSView32 User’s Guide 753
- I–4 RSView32 User’s Guide 755
- I–6 RSView32 User’s Guide 757
- I–8 RSView32 User’s Guide 759
- I–10 RSView32 User’s Guide 761
- I–11 762
- I–12 RSView32 User’s Guide 763
- I–13 764
- I–14 RSView32 User’s Guide 765
- I–15 766
- I–16 RSView32 User’s Guide 767
- I–17 768
- I–18 RSView32 User’s Guide 769
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