Protocolo de comunicacion hart

HCF LIT 34

APPLICATION GUIDE

HART APPLICATION GUIDE

Table of Contents
Preface............................................................................................................................................................. 1 Theory ofOperation........................................................................................................................................ 2 Communication Modes ................................................................................................................................... 3 Master-Slave Mode ................................................................................................................................... 3 BurstMode................................................................................................................................................ 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 HARTDevice.................................................................................. 8 Device Description ................................................................................................................................... 8 Benefits of HART Communication ............................................................................................................... 9 Improved PlantOperations........................................................................................................................... 10 Cost Savings in Commissioning ............................................................................................................. 10 Cost Savings in Installation.................................................................................................................... 10 Improved Measurement Quality ............................................................................................................. 11 Cost Savings in Maintenance.................................................................................................................. 12 OperationalFlexibility.................................................................................................................................. 13 Instrumentation Investment Protection ....................................................................................................... 14 Compatibility of HART Revisions........................................................................................................... 14 Digital Communication...