Rosemount OCX 8800 - Page 6

Instruction Manual
IM-106-880, Rev 2.1
April 2017
OCX 8800
TOC-2
SECTION 6
Field Communicator
Overview ............................................................................................... 6-1
Field Communicator Connections ......................................................... 6-1
Off-Line and On-Line Operations .......................................................... 6-4
Hart Menu Tree ..................................................................................... 6-5
Fieldbus Menu Tree .............................................................................. 6-9
SECTION 7
Foundation Fieldbus
Foundation Fieldbus Technology .......................................................... 7-1
Overview .......................................................................................... 7-1
Introduction ...................................................................................... 7-2
Instrument-Specific Function Blocks................................................ 7-4
Network Communication .................................................................. 7-4
OCX Function Blocks ............................................................................ 7-6
Resource Block ..................................................................................... 7-6
PlantWeb Alerts ............................................................................... 7-6
Mapping of PWA .............................................................................. 7-7
PWA Simulate ................................................................................ 7-10
Fieldbus/PWA Simulate ................................................................. 7-10
Configure Simulation with the Model 375 Field Communicator . . 7-11
Support Resource Block Errors ..................................................... 7-13
Transducer Block ................................................................................ 7-13
Transducer Block Parameters ....................................................... 7-13
Transducer Block Enumerations.................................................... 7-17
Transducer Block Channel Assignments for AI Blocks ................. 7-22
Transducer Block Channel Status ................................................. 7-22
Transducer Block Simulate ............................................................ 7-23
Support Transducer Block Errors .................................................. 7-23
Analog Input (AI) Function Block ........................................................ 7-23
Introduction .................................................................................... 7-23
Simulation ...................................................................................... 7-26
Filtering .......................................................................................... 7-27
Signal Conversion .......................................................................... 7-27
Block Errors ................................................................................... 7-28
Modes ............................................................................................ 7-29
Alarm Detection ............................................................................. 7-29
Status Handling ............................................................................. 7-29
Advanced Features ........................................................................ 7-30
Application Information .................................................................. 7-30
Application Examples .................................................................... 7-31
Troubleshooting ............................................................................. 7-35
Proportional/Integral/Derivative (PID) Function Block ........................ 7-36
Setpoint Selection and Limiting ..................................................... 7-40
Filtering .......................................................................................... 7-41
Feedforward Calculation ................................................................ 7-41
Tracking ......................................................................................... 7-41
Output Selection and Limiting ........................................................7-41
Bumpless Transfer and Setpoint Tracking .................................... 7-41
PID Equation Structures ................................................................ 7-42
Reverse and Direct Action ............................................................. 7-42
Reset Limiting ................................................................................ 7-42
Block Errors ................................................................................... 7-42
Modes ............................................................................................ 7-43
Alarm Detection ............................................................................. 7-44