Control Builder Components Theory EXDOC-XX16-En-110

7/24/2019 Control Builder Components Theory EXDOC-XX16-En-110

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Honeywell Process Solutions

Experion LX

Control Builder Components

Theory

EXDOC-XX16-en-110A

R110February 2014

Release 110

Honeywell


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ii Experion LX Control Builder Components Theory R110Honeywell February 2014

Notices and Trademarks

Copyright 2014 by Honeywell International Inc.Release R110 February 2014

While this information is presented in good faith and believed to be accurate, Honeywell disclaimsthe implied warranties of merchantability and fitness for a particular purpose and makes noexpress warranties except as may be stated in its written agreement with and for its customers.

In no event is Honeywell liable to anyone for any indirect, special or consequential damages. Theinformation and specifications in this document are subject to change without notice.

Honeywell, PlantScape, ExperionLX, and TotalPlantare registered trademarks of HoneywellInternational Inc.

Other brand or product names are trademarks of their respective owners.

Honeywell Process Solutions

1860 W. Rose Garden Lane

Phoenix, AZ 85027 USA

1-800 343-0228


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R110 Experion LX Control Builder Components Theory iiiFebruary 2014 Honeywell

About This Document

Provides general and detailed theoretical or how it works information for selectedControl Builder related functions and the control library function blocks. It does notcover the hardware associated blocks like the Input/Output Module blocks.

Release Information

Document Name Document ID Release

Number

Publication

DateControl Builder Components Theory EXDOC-XX16-en-110A R110 February

2014


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Support and Other Contacts

iv Experion LX Control Builder Components Theory R110Honeywell February 2014

Support and Other Contacts

Peoples Republic of China

Contact:Phone:Mail:

Email:

Honeywell Global TAC China+86- 21-5257-4568Honeywell (China) Co., Ltd33/F, Tower A, City Center, 100 Zunyi Rd.Shanghai 200051, Peoples Republic of [email protected]


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Symbol Definitions

R110 Experion LX Control Builder Components Theory vFebruary 2014 Honeywell

Symbol Definitions

The following table lists those symbols used in this document to denote certain conditions.

Symbol Definition

ATTENTION:Identifies information that requires specialconsideration.

TIP:Identifies advice or hints for the user, often in terms ofperforming a task.

REFERENCE -EXTERNAL:Identifies an additional source ofinformation outside of the bookset.

REFERENCE - INTERNAL:Identifies an additional source ofinformation within the bookset.

CAUTION Indicates a situation which, if not avoided, may result in equipmentor work (data) on the system being damaged or lost, or may result inthe inability to properly operate the process.

CAUTION: Indicates a potentially hazardous situation which, if notavoided, may result in minor or moderate injury. It may also be usedto alert against unsafe practices.

CAUTION symbol on the equipment refers the user to the productmanual for additional information. The symbol appears next torequired information in the manual.

WARNING: Indicates a potentially hazardous situation, which, if notavoided, could result in serious injury or death.

WARNING symbol on the equipment refers the user to the productmanual for additional information. The symbol appears next torequired information in the manual.

WARNING, Risk of electrical shock: Potential shock hazard whereHAZARDOUS LIVE voltages greater than 30 Vrms, 42.4 Vpeak, or60 VDC may be accessible.


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Symbol Definitions

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Symbol Definition

ESD HAZARD:Danger of an electro-static discharge to whichequipment may be sensitive. Observe precautions for handlingelectrostatic sensitive devices.

Protective Earth (PE) terminal: Provided for connection of theprotective earth (green or green/yellow) supply system conductor.

Functional earth terminal: Used for non-safety purposes such asnoise immunity improvement. NOTE: This connection shall be

bonded to Protective Earth at the source of supply in accordancewith national local electrical code requirements.

Earth Ground:Functional earth connection. NOTE: Thisconnection shall be bonded to Protective Earth at the source ofsupply in accordance with national and local electrical coderequirements.

Chassis Ground: Identifies a connection to the chassis or frame ofthe equipment shall be bonded to Protective Earth at the source ofsupply in accordance with national and local electrical coderequirements.


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Contents

1. CONTROL BUILDER COMPONENTS ..........................................45

1.1 Some Underlying Concepts ........................................................................ 45

Introduction ............................................................................................................... 45

In the beginning or the Single-Loop Controller Reference ........................................ 45

Experion LX architecture - partitioned functionality ................................................... 47

Blocks for building process control operations.......................................................... 48

Naming convention- independent versus dependent ................................................ 50

Full or expanded tag name ....................................................................................... 52

Parameter names ..................................................................................................... 52

Naming restrictions and conventions ........................................................................ 54

Parameter data types ............................................................................................... 54

Data flow -- active versus passive ............................................................................ 55

Active and passive connectors ................................................................................. 55

Cascade loop connections ....................................................................................... 56

Data pull or push ...................................................................................................... 57

1.2 Control Capacity and Performance ............................................................ 58

Control network capacity .......................................................................................... 58

C300 configuration options ....................................................................................... 58

C300 Redundancy .................................................................................................... 59

C300 communication performance ........................................................................... 60

C300 processing resources ...................................................................................... 63

C300 Memory Resources ......................................................................................... 63

1.3 I/O Capaci ty and Performance .................................................................... 64

C300 IO capacity ...................................................................................................... 64

IO Unit load factors ................................................................................................... 64

1.4 Function Block Execution Schedules ........................................................ 65

Schedule consideration differences .......................................................................... 65Control Module and Sequential Control Module FBs schedule ................................. 65

CM Component Function Block scheduling .............................................................. 69

IOM FB schedule ...................................................................................................... 73


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CEEC300 FB schedule ............................................................................................ 73

Cycle overruns ......................................................................................................... 74

1.5 Block Conf iguration Load Cons iderations ................................................ 75

About load considerations ........................................................................................ 75

Data categories ........................................................................................................ 75

Container and self-standing blocks load versus states ............................................. 76

Load error messages ............................................................................................... 77

RAM Retention Start Up (RRSU) ............................................................................. 77

1.6 Memory Usage for CEE on C300 ................................................................. 78

Typical Requirements............................................................................................... 78

C300 CEE Processing and Memory Models ............................................................ 78

1.7 CEE Standard Control Blocks ..................................................................... 82

2. CONTROL MODULE INDEPENDENCE ....................................... 89

2.1 Module Independence for Flexib le Modification ....................................... 89

2.2 CM Independence and Hypothetical Contro ller Comparison .................. 89

Hypothetical controller structure ............................................................................... 89

Coupling effects in hypothetical controller ................................................................ 90

2.3 CEE Architecture .......................................................................................... 92

CEE controller structure ........................................................................................... 92

Program and Data Partitioning ................................................................................. 93

Native program and custom program partitioning .................................................... 94

Regulated Base Cycle .............................................................................................. 94

Coupling effects in CEE-based controller ................................................................. 95

2.4 Validat ion of Cont rol Module Independence ............................................. 98

2.5 Resource Coupling Across Different Platforms ...................................... 100

3. RELATIVE REFERENCES ......................................................... 101

3.1 About Relative References ........................................................................ 101

3.2 Relative References structure rules ......................................................... 101

How relative reference matching function works .................................................... 102

3.3 Disp lay options for relat ive references .................................................... 104

How short name display option works .................................................................... 105


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3.4

Control Builder functions suppor ting relative references ..................... 106

3.5 Control Builder blocks suppor ting express ions ..................................... 106

3.6 Example of TRANSITION block using relative references ..................... 106

A container reference from a chart ......................................................................... 107

A reference to a parameter on the same block from a form ................................... 107

A reference to a parameter on a different block in the same CM............................ 107

Expression display interaction ................................................................................ 108

3.7 Example of parameter connector using relative references ................. 109

A reference to a parameter on a different block in the same CM............................ 109

Parameter connector display interaction ................................................................ 110

3.8

Example of other parameters using relative references ........................ 110

A reference to a parameter on a basic block of the CM .......................................... 112

Other parameters display interaction ...................................................................... 112

3.9 Bulk Bui lder and Bulk Editor support ...................................................... 113

4. PEER-TO-PEER FUNCTIONALITY ............................................ 115

4.1 Basic Peer-to-Peer Design Concepts ....................................................... 115

About Peer-to-Peer................................................................................................. 115

Data flow models .................................................................................................... 115

Peer environments and subscription periods .......................................................... 115

Software Architecture for C300/CEE ...................................................................... 116

4.2 Ini tiator Rate - Calculat ion ......................................................................... 118

Overview ................................................................................................................ 118

Configuration without peer environment table ........................................................ 118

Configuration with peer environment table ............................................................. 118

4.3 Implications for Control Builder Configuration ...................................... 122

CEE execution and subscription rates .................................................................... 122

Function block support ........................................................................................... 122

Peer-to-peer connections and DEF and REF blocks .............................................. 123

Peer-to-peer configuration example ....................................................................... 124

Peer-to-peer configuration guidelines ..................................................................... 127

5. TIME SUPPORT IN EXPERION LX SYSTEM ............................. 129

5.1 Date and Time Synchronization ................................................................ 129


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5.2

C300 Interface Module Time Synchronization ......................................... 129

BOOTP Mechanism and Multiple Clusters ............................................................. 130

5.3 Time Conf igurat ion Cons iderations ......................................................... 131

Time Data Types in Control Execution Environment (CEE) Blocks ........................ 131

Time Data Types in User Algorithms and Displays ................................................ 131

5.4 Examples o f Time Usage in CAB and SCM .............................................. 133

Example - Custom Algorithm Block (CAB) writes Time CDP ................................. 133

Example - Custom Algorithm Block (CAB) reads Time CDP .................................. 133

Example - Sequence Control Module (SCM) waits for a specified Time ................ 134

Example - Sequence Control Module (SCM) records Time of process command.. 134

6. COLD AND WARM RESTART FUNCTIONALITY ...................... 137

6.1 Overview ...................................................................................................... 137

CEE Initial Startup .................................................................................................. 137

CEE Restarts ......................................................................................................... 137

CEE Restart Behaviors .......................................................................................... 138

6.2 Planning ....................................................................................................... 139

Invariant or Variant Restart Behaviors ................................................................... 139

Blocks with Invariant Restart Behavior ................................................................... 139

Blocks with Variant Restart Behavior ..................................................................... 142

6.3

Conf iguration of Restart Behaviors .......................................................... 145

CEE Block .............................................................................................................. 145

Control Module (CM) .............................................................................................. 145

Control Module Function Blocks ............................................................................. 146

Logic Blocks ........................................................................................................... 146

Sequential Control Module (SCM) .......................................................................... 148

Summary Of SCM Restart Behavior ...................................................................... 151

Supporting SCM Functionalities ............................................................................. 152

SCM Blocks............................................................................................................ 154

Warm and Cold Restart Behaviors of Cascades .................................................... 154

6.4 Operations ................................................................................................... 158

CEE Function Block ............................................................................................... 158

7. EXTERNAL OPC SERVER SUPPORT ....................................... 161


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7.1

OPC Data Access ....................................................................................... 161

OPC Server function block ..................................................................................... 161

7.2 OPC Data References ................................................................................ 161

OPC Data Name Syntax ......................................................................................... 161

Parameter connectors only ..................................................................................... 161

OPC references in expressions .............................................................................. 161

OPC references in SCM Alias table ........................................................................ 162

8. CONTROL MODE SHED ON LOSS OF I/O FUNCTIONALITY .. 165

8.1 Basic Control Mode Shed Design Concepts ........................................... 165

About Control Mode shed on loss of I/O ................................................................. 165

How it works ........................................................................................................... 165

8.2 Option to specify a time delay for the REGCTL blocks to shed the mode...................................................................................................................... 166

Enabling the option of specifying time delay for REGCTL blocks to shed the mode166

Description of values for Bad Output Connection Option ....................................... 168

Considerations for setting the BADOCOPT value .................................................. 170

Applicability of BADOCOPT parameter for FANOUT blocks .................................. 170

Simulation support for the BADOCOPT parameter ................................................ 171

Impact of BADOCOPT parameter on regulatory control functionalities .................. 171

Effects of BADOCOPT value on delay timer in various scenarios .......................... 172

Auxiliary memory usage for the parameters ........................................................... 173

Detail Displays ........................................................................................................ 173

8.3 Implications for Operation ........................................................................ 176

Resetting mode after I/O communications are restored. ........................................ 176

Allowing Redundancy synchronization with lost I/O communications ..................... 176

8.4 Remote Cascade funct ion betw een Controllers ..................................... 176

9. CONTROL BUILDER EXPORT AND IMPORT FUNCTIONALITY177

9.1 Basic Export /Impor t Design Concepts .................................................... 177

About Control Builder Export and Import functions ................................................. 177

Export functionality ................................................................................................. 177Import functionality ................................................................................................. 179

Export/Import functional overview ........................................................................... 180


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9.2

Some Operat ion Considerations ............................................................... 181

Export/Import usage notes ..................................................................................... 181

10. SCM AND CM CHART VISUALIZATION FUNCTIONALITY ...... 183

10.1 Basic Chart Visualization Design Concepts ............................................ 183

About Chart Visualization ....................................................................................... 183

How SCM chart visualization works ....................................................................... 183

10.2 Some SCM and CM Chart Operat ion Cons iderations ............................. 188

Detail display interaction notes ............................................................................... 188

11.

I/O LINK INTERFACE ................................................................. 189

11.1 I/O Link Interface ......................................................................................... 189

Seamless integration .............................................................................................. 189

I/O Functions .......................................................................................................... 189

About Point form .................................................................................................... 189

11.2 I/O Link Cable Status and Statistics ......................................................... 190

Periodic swap functionality ..................................................................................... 190

Periodic swap transition diagram ............................................................................ 190

12. COMPONENT CATEGORIES AND TYPES ............................... 193

12.1

Overview ...................................................................................................... 193

About categories .................................................................................................... 193

Function block types and Data Organization .......................................................... 193

13. REGULATORY CONTROL ......................................................... 195

13.1 Regulatory Control Blocks ........................................................................ 195

Functional overview................................................................................................ 195

CAB insertion configuration considerations for regulatory control blocks ............... 198

Insertion type functional characteristics for regulatory control blocks ..................... 199

Functional requirements for Custom CAB algorithm for regulatory control block ... 201

CAB insertions for Regulatory Control block parameters ....................................... 203Pin connections to inserted CAB instances ............................................................ 204

Insertion status and fail alarm for regulatory control blocks .................................... 205

Handling of insertion failure on regulatory control block ......................................... 205


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CAB insertion on regulatory control block configuration examples ......................... 206

Tuning Conversions from Interactive to Non-Interactive PID .................................. 212

13.2 About Safety Interlock Function ............................................................... 215

Safety Interlock processing .................................................................................... 215

Safety Interlock processing considerations............................................................. 216

Safety Interlock Alarming ........................................................................................ 217

13.3 About Red Tagging .................................................................................... 217

Purpose of Red Tagging ......................................................................................... 217

Function of Red Tagging ........................................................................................ 218

Before red tagging a point ...................................................................................... 218

13.4

AUTOMAN (Auto Manual) Block ............................................................... 218

Description ............................................................................................................. 218

Function .................................................................................................................. 228

Configuration example ............................................................................................ 228

Inputs...................................................................................................................... 230

Output..................................................................................................................... 231

Initializable inputs and outputs................................................................................ 231

Output ranges ......................................................................................................... 232

Output bias ............................................................................................................. 232

Output Indication Function ...................................................................................... 235

Mode Handling ....................................................................................................... 238

Timeout Monitoring ................................................................................................. 238

Control Initialization ................................................................................................ 238

Secondary initialization option ................................................................................ 239

Override feedback processing ................................................................................ 240

Windup processing ................................................................................................. 240

Anti-Reset Windup Status ...................................................................................... 243

AUTOMAN parameters .......................................................................................... 244

13.5 ENHREGCALC (Enhanced Regulatory Control Calculator ) Block ........ 244

Description ............................................................................................................. 244

Function .................................................................................................................. 257


Operating modes and mode handling ..................................................................... 258

Inputs...................................................................................................................... 259

Initializable input ..................................................................................................... 259

SP limit checking .................................................................................................... 260


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SP target value processing .................................................................................... 260

Initializable outputs ................................................................................................. 263

Output ranges and limits ........................................................................................ 264

Assignable outputs ................................................................................................. 265

Output assignment rules ........................................................................................ 265

Control initialization ................................................................................................ 267

Output bias ............................................................................................................. 268

Output Indication Function ..................................................................................... 270

Timeout monitoring ................................................................................................ 273

Timeout processing ................................................................................................ 274

Mode shedding on timeout ..................................................................................... 274


Windup handling .................................................................................................... 276



Expressions ............................................................................................................ 281

Parameters in Expressions .................................................................................... 284

Guidelines for Writing Expressions ........................................................................ 284

Enable/Disable switch example expression ............................................................ 286

String data support in expressions ......................................................................... 286

Time support in expressions .................................................................................. 287

Restart or Point Activation ...................................................................................... 290

ENHREGCALC parameters ................................................................................... 290

13.6 FANOUT Block ............................................................................................ 291

Description ............................................................................................................. 291

Function ................................................................................................................. 300

Configuration example ........................................................................................... 300

Inputs ..................................................................................................................... 301

Outputs .................................................................................................................. 301

Initializable inputs and outputs ............................................................................... 301

Output ranges ........................................................................................................ 302

Output bias ............................................................................................................. 303

Mode handling ........................................................................................................ 305






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BACKCALC processing .......................................................................................... 308


Windup processing in FANOUT block .................................................................... 311

Windup processing in Regulatory blocks ................................................................ 312


FANOUT parameters ............................................................................................. 316

13.7 OVRDSEL (Override Selector) Block........................................................ 316

Description ............................................................................................................. 316

Function .................................................................................................................. 326


Configuration considerations .................................................................................. 331

Inputs...................................................................................................................... 332

Input ranges ........................................................................................................... 332

Input descriptors ..................................................................................................... 332


Output ranges and limits ......................................................................................... 333


Mode handling ........................................................................................................ 337

Timeout monitoring ................................................................................................. 337


Bypass processing ................................................................................................. 338

Bad input option ..................................................................................................... 338

Equations ............................................................................................................... 338

Input switching ........................................................................................................ 339

Output bias ............................................................................................................. 339

Bad CV processing ................................................................................................. 339


Restart or function block activation ......................................................................... 340

Override feedback propagation .............................................................................. 341

Recommendations on configuring override strategies ............................................ 342



OVRDSEL parameters ........................................................................................... 347

13.8

PID Block ..................................................................................................... 347Description ............................................................................................................. 347

Function .................................................................................................................. 363

Functional scenario ................................................................................................ 364


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Configuration examples .......................................................................................... 365

Operating modes and mode handling .................................................................... 369

Required inputs ...................................................................................................... 369

Input ranges and limits ........................................................................................... 370



Output bias ............................................................................................................. 372


Direct or reverse control ......................................................................................... 375

Set Point Ramping ................................................................................................. 375

PV tracking ............................................................................................................. 379

PID equations ......................................................................................................... 380

Gain options ........................................................................................................... 382

Tuning Constant Change Considerations ............................................................... 384




Windup handling .................................................................................................... 389




PID parameters ...................................................................................................... 395

13.9

PID-PL (Prof it Loop PKS) Block ................................................................ 395

Description ............................................................................................................. 395

Function ................................................................................................................. 410

Configuration examples .......................................................................................... 419


Required inputs ...................................................................................................... 426




Output bias ............................................................................................................. 428




Range Control Ramping ......................................................................................... 428

PV tracking ............................................................................................................. 429


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PV Bad Value Handling .......................................................................................... 430

PV Calibration ........................................................................................................ 430

Asynchronous PV Inputs ........................................................................................ 431

Control Equations ................................................................................................... 432




Windup handling ..................................................................................................... 437




PID-PL parameters ................................................................................................. 441

13.10PIDER (PID w ith External Reset Feedback) B lock .................................. 442

Description ............................................................................................................. 442


Function .................................................................................................................. 458


Required inputs ...................................................................................................... 460




Output bias ............................................................................................................. 462



Set Point Ramping.................................................................................................. 466

PV tracking ............................................................................................................. 470

PID equations ......................................................................................................... 471

PIDER equation variations ..................................................................................... 473

Gain options ........................................................................................................... 474





Windup handling ..................................................................................................... 479





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Error handling for RFB and TRFB inputs ............................................................... 483

Restart or point activation....................................................................................... 484

PIDER parameters ................................................................................................. 484

13.11PIDFF (PID with Feedforward) Block ........................................................ 484

Description ............................................................................................................. 484

Function ................................................................................................................. 501

Functional scenario ................................................................................................ 502


Required inputs ...................................................................................................... 504




Output bias ............................................................................................................. 506




PV tracking ............................................................................................................. 513

Feedforward add or multiply action and equations ................................................. 514

Feedforward value status ....................................................................................... 517

PID equations ......................................................................................................... 517

Gain options ........................................................................................................... 519





Windup handling .................................................................................................... 526



Bypassing feedforward control action ..................................................................... 530


PIDFF parameters .................................................................................................. 532

13.12LEGACYGAP Opt ion .................................................................................. 532

Introduction ............................................................................................................ 532

Legacy gap gain option .......................................................................................... 533Equation ................................................................................................................. 533

Configuration .......................................................................................................... 534

Migration ................................................................................................................ 535


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13.13

POSPROP (Posit ion Proport ional) Block ................................................ 535

Description ............................................................................................................. 535

Function .................................................................................................................. 546


Required inputs ...................................................................................................... 549


Output..................................................................................................................... 550


Output ranges ......................................................................................................... 550

Set Point Ramping.................................................................................................. 551



Equations ............................................................................................................... 556




Raise/Lower limit switches ...................................................................................... 558

Bad control processing ........................................................................................... 558



POSPROP parameters........................................................................................... 563

13.14PULSECOUNT Block .................................................................................. 563

Description ............................................................................................................. 563

Function .................................................................................................................. 565

Required inputs ...................................................................................................... 566

Output..................................................................................................................... 566


PULSECOUNT parameters .................................................................................... 567

13.15PULSELENGTH Block ................................................................................ 568

Description ............................................................................................................. 568

Function .................................................................................................................. 569

Required inputs ...................................................................................................... 570

Output..................................................................................................................... 570


PULSELENGTH parameters .................................................................................. 571

13.16RAMPSOAK Block...................................................................................... 572


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Description ............................................................................................................. 572

Function ................................................................................................................. 584

Required inputs ...................................................................................................... 586




Mode handling ........................................................................................................ 588

Hold command ....................................................................................................... 588

CEE idle or Control Module inactivate command ................................................... 588

Profile statistics ...................................................................................................... 589

Guaranteed ramp rate ............................................................................................ 589

Guaranteed soak time ............................................................................................ 590

Event timer functions .............................................................................................. 590






RAMPSOAK parameters ........................................................................................ 596

13.17RATIOBIAS Block ....................................................................................... 596

Description ............................................................................................................. 596

Function ................................................................................................................. 605



Required inputs ...................................................................................................... 608





Ratio bias option .................................................................................................... 611

Output bias ............................................................................................................. 612





Windup handling .................................................................................................... 619



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RATIOBIAS parameters ......................................................................................... 624

13.18RATIOCTL (Rat io Control ) Block .............................................................. 624

Description ............................................................................................................. 624

Function .................................................................................................................. 635



Required inputs ...................................................................................................... 637





Equations ............................................................................................................... 641

Output bias ............................................................................................................. 643





Windup handling ..................................................................................................... 650



Restart or point activation ....................................................................................... 655

Error handling ......................................................................................................... 655

RATIOCTL parameters .......................................................................................... 656

13.19REGCALC (Regulatory Cont rol Calculator) B lock .................................. 656

Description ............................................................................................................. 656

Function .................................................................................................................. 669


Inputs...................................................................................................................... 670




Assignable outputs ................................................................................................. 672

Output assignment rules ......................................................................................... 673Control initialization ................................................................................................ 674

Output bias ............................................................................................................. 675



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Windup handling .................................................................................................... 683



Expressions ............................................................................................................ 688



String data support in expressions ......................................................................... 692

Time support in expressions .................................................................................. 693

REGCALC parameters ........................................................................................... 696

13.20REGSUMMER (Regulatory Summer) Block ............................................. 696

Description ............................................................................................................. 696

Equation ................................................................................................................. 706

Function ................................................................................................................. 707


Inputs ..................................................................................................................... 707

Outputs .................................................................................................................. 708

Initializable inputs and outputs ............................................................................... 708

Output Ranges ....................................................................................................... 708

Output bias ............................................................................................................. 709

Mode handling ........................................................................................................ 710





REGSUMMER parameters .................................................................................... 718

13.21REMCAS (Remote Cascade) Block ........................................................... 718

Description ............................................................................................................. 718

Function ................................................................................................................. 728


Inputs ..................................................................................................................... 733

Input ranges and limits ........................................................................................... 733Input descriptors ..................................................................................................... 733

Outputs .................................................................................................................. 733



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Mode handling ........................................................................................................ 739



Input switching ........................................................................................................ 740

Equations ............................................................................................................... 741

Output bias ............................................................................................................. 741





REMCAS parameters ............................................................................................. 749

13.22SWITCH Block ............................................................................................ 749

Description ............................................................................................................. 749

Function .................................................................................................................. 759

Inputs...................................................................................................................... 761


Input descriptors ..................................................................................................... 762

Initializable Outputs ................................................................................................ 762


Mode handling ........................................................................................................ 763



Equations ............................................................................................................... 764

Bad input handling .................................................................................................. 766

Bypass processing ................................................................................................. 767

Input switching ........................................................................................................ 767

Output bias ............................................................................................................. 767

Error handling ......................................................................................................... 770






SWITCH parameters .............................................................................................. 778

14. AUXILIARY FUNCTIONS ............................................................ 779


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14.1

Auxi liary Funct ion Blocks ......................................................................... 779

Functional Overview ............................................................................................... 779

Common auxiliary block functions .......................................................................... 781

14.2 AUXCALC (Auxil iary Calculation) Block .................................................. 782

Description ............................................................................................................. 782

Function ................................................................................................................. 782


Input ....................................................................................................................... 784

Output .................................................................................................................... 785

Expressions ............................................................................................................ 785



Assignable Outputs ................................................................................................ 787

AUXCALC parameters ........................................................................................... 787

14.3 AUXSUMMER (Aux il iary Summer) Block ................................................. 788

Description ............................................................................................................. 788

Function ................................................................................................................. 788

Configuration parameters ....................................................................................... 789


Input ....................................................................................................................... 791

Output .................................................................................................................... 792

Error handling ......................................................................................................... 792

Restart or point activation....................................................................................... 792

AUXSUMMER parameters ..................................................................................... 792

14.4 CTUD (COUNTER UP/DOWN) Block ......................................................... 792

Description ............................................................................................................. 792

Function ................................................................................................................. 793

Inputs ..................................................................................................................... 793

Outputs .................................................................................................................. 796

Edge or Level trigger mechanism ........................................................................... 796

Supported algorithms ............................................................................................. 799

Counter overflow and underflow conditions ............................................................ 799

Effects of restart or point activation on CTUD ........................................................ 803

Effects of Import or Export on CTUD ...................................................................... 803

Effects of Checkpoint operations CTUD ................................................................. 803

Parameter error handling ....................................................................................... 805


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CTUD parameters .................................................................................................. 805

14.5 DEADTIME Block ........................................................................................ 805

Description ............................................................................................................. 805

Function .................................................................................................................. 807

Input ....................................................................................................................... 808

Output..................................................................................................................... 808

PV status ................................................................................................................ 808

Error handling ......................................................................................................... 809

Delay type .............................................................................................................. 809

Delay table ............................................................................................................. 810

Restart condition .................................................................................................... 811

DEADTIME parameters .......................................................................................... 811

14.6 ENHAUXCALC (Enhanced Auxil iary Calculation) Block ........................ 812

Description ............................................................................................................. 812

Function .................................................................................................................. 813


Input ....................................................................................................................... 815

Output..................................................................................................................... 816

Expressions ............................................................................................................ 816

Parameters in Expressions ..................................................................................... 816

Guidelines for Writing Expressions ......................................................................... 817

Enable/Disable switch example expression ............................................................ 818

Scaled Input example expression ........................................................................... 819

Assignable Outputs ................................................................................................ 819

ENHAUXCALC parameters .................................................................................... 820

14.7 ENHGENLIN (Enhanced General Linearization) B lock ........................... 820

Description ............................................................................................................. 820

Function .................................................................................................................. 822

Configuration Parameters ....................................................................................... 823

Input ....................................................................................................................... 824

Output..................................................................................................................... 824

Error Handling ........................................................................................................ 824

Strategy Optimization using ENHGENLIN block ..................................................... 824

ENHGENLIN block Usage Scenario .................................................................... 825

ENHGENLIN parameters ....................................................................................... 832

14.8 FLOWCOMP (Flow Compensation) Block ............................................... 832


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Contents

xxvi Experion LX Control Builder Components Theory R110Honeywell February 2014

Description ............................................................................................................. 832

Function ................................................................................................................. 833


Input ...................................................................

Documents

Control Builder Components Theory EXDOC-XX16-En-110