APPLICATION GUIDE
HCF LIT 34
Table of Contents
HART APPLICATION GUIDE
© 1999 HART Communication Foundation Page iii
Preface.............................................................................................................................................................1
Theory of Operation........................................................................................................................................2
Communication Modes...................................................................................................................................3
Master-Slave Mode...................................................................................................................................3
Burst Mode................................................................................................................................................3
Frequency Shift Keying..................................................................................................................................4
HART Networks..............................................................................................................................................5
Point-to-Point...........................................................................................................................................5
Multidrop..................................................................................................................................................6
HART Commands...........................................................................................................................................7
Universal...................................................................................................................................................7
Common Practice.....................................................................................................................................7
Device Specific..........................................................................................................................................7
Summary Table.........................................................................................................................................7
Establishing Communication with a HART Device..................................................................................8
Device Description...................................................................................................................................8
Benefits of HART Communication ...............................................................................................................9
Improved Plant Operations...........................................................................................................................10
Cost Savings in Commissioning.............................................................................................................10
Cost Savings in Installation....................................................................................................................10
Improved Measurement Quality.............................................................................................................11
Cost Savings in Maintenance..................................................................................................................12
Operational Flexibility..................................................................................................................................13
Instrumentation Investment Protection.......................................................................................................14
Compatibility of HART Revisions...........................................................................................................14
Digital Communication................................................................................................................................15
Getting the Most out of HART Systems.......................................................................................................16
Wiring and Installation.................................................................................................................................17
Cable Length...........................................................................................................................................17
Intrinsic Safety..............................................................................................................................................18
Intrinsic Safety Devices..........................................................................................................................18
Designing an IS System Using Shunt-Diode Barriers............................................................................19
Designing an IS System Using Isolators.................................................................................................20
Multidrop IS Networks............................................................................................................................21
IS Output Loops......................................................................................................................................21
IS Certification Considerations..............................................................................................................21
IS Network Cable Length Calculations..................................................................................................21
HART Multidrop Networks..........................................................................................................................22
Multidrop with HART Field Controllers................................................................................................23
Application Considerations....................................................................................................................23
Configuring Devices for Multidrop Operation.......................................................................................23
Control System Interfaces.............................................................................................................................24
HART I/O Subsystems.............................................................................................................................24
HART I/O for Multidrop Support...........................................................................................................24
HART I/O for Burst Mode Support.........................................................................................................24
Table of Contents
HART APPLICATION GUIDE
Page iv © 1999 HART Communication Foundation
Data Handling........................................................................................................................................25
Passthrough Feature...............................................................................................................................25
Gateways.................................................................................................................................................25
SCADA/RTU Systems..............................................................................................................................25
Multiplexers...................................................................................................................................................26
Multiplexer as the Primary I/O System...................................................................................................26
Parallel Monitoring with a Multiplexer..................................................................................................26
Reading HART Data into NonHART Systems............................................................................................28
HART Data-Conversion Products..........................................................................................................28
Universal Handheld Communicator............................................................................................................30
PC Configuration Software..........................................................................................................................31
Summary Table of HART Software.........................................................................................................31
Commissioning HART Networks.................................................................................................................32
Device Verification.................................................................................................................................32
Loop Integrity Check..............................................................................................................................32
As-Installed Record Keeping..................................................................................................................32
Device Status and Diagnostics......................................................................................................................33
Connecting a PC to a HART Device or Network.........................................................................................34
PC Application Development Tools..............................................................................................................35
Control in Field Devices...............................................................................................................................36
HART Field Controller Implementation.................................................................................................37
Industry Applications....................................................................................................................................38
Inventory-Management Applications...........................................................................................................39
HART Multidrop Network for Tank Level and Inventory Management.................................................39
Multidrop for Tank Farm Monitoring....................................................................................................40
Underground Petroleum Storage with HART Communication for Accuracy........................................41
Cost-Saving Applications..............................................................................................................................42
Wastewater Treatment Plant Upgrade...................................................................................................42
Appliance Manufacturing with Multidrop..............................................................................................43
Remote Rezeroing in a Brewery..............................................................................................................44
Water Treatment Facility Upgrade.........................................................................................................45
Improved Diagnostics.............................................................................................................................46
Remote-Operation Applications....................................................................................................................47
Unmanned Offshore Gas Production with HART Networks..................................................................47
Venezuela Gas-Lift Project.....................................................................................................................48
Open-Architecture Applications...................................................................................................................49
Oil Refinery Expansion...........................................................................................................................49
HART Within a PROFIBUS Network.....................................................................................................50
HART/DDE Server..................................................................................................................................51
Where To Get More Information.................................................................................................................52
What Information is Available?..............................................................................................................52