Yokogawa AXFA14G/C - Manual (Page 5)

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CONTENTS
IM 01E20F02-01E
APPENDIX 5. PID BLOCK .............................................................................. A-32
A5.1 Function Diagram .............................................................................. A-32
A5.2 Functions of PID Block ..................................................................... A-32
A5.3 Parameters of PID Block .................................................................. A-33
A5.4 PID Computation Details ................................................................... A-35
A5.4.1 PV-proportional and -derivative Type PID (I-PD)
Control Algorithm ........................................................................ A-35
A5.4.2 PID Control Parameters ............................................................. A-35
A5.5 Control Output ................................................................................... A-35
A5.5.1 Velocity Type Output Action ....................................................... A-35
A5.6 Direction of Control Action ................................................................ A-35
A5.7 Control Action Bypass ....................................................................... A-35
A5.8 Feed-forward ..................................................................................... A-36
A5.9 Block Modes ...................................................................................... A-36
A5.9.1 Mode Transitions ........................................................................ A-36
A5.10 Bumpless Transfer ............................................................................ A-37
A5.11 Setpoint Limiters ............................................................................... A-37
A5.11.1 When PID Block Is in Auto Mode ............................................ A-37
A5.11.2 When PID Block Is in Cas or RCas Mode ............................... A-37
A5.12 External-output Tracking ................................................................... A-37
A5.13 Measured-value Tracking .................................................................. A-37
A5.14 Initialization and Manual Fallback (IMan) ......................................... A-38
A5.15 Manual Fallback ................................................................................ A-38
A5.16 Auto Fallback .................................................................................... A-38
A5.17 Mode Shedding upon Computer Failure ........................................... A-39
A5.17.1 SHED_OPT .............................................................................. A-39
A5.18 Alarms ............................................................................................... A-39
A5.18.1 Block Alarm (BLOCK_ALM) ..................................................... A-39
A5.18.2 Process Alarms ........................................................................ A-39
A5.19 Example of Block Connections ......................................................... A-40
A5.20 View Object for PID Function Block ................................................. A-40
APPENDIX 6. SOFTWARE DOWNLOAD ....................................................... A-42
A6.1 Benefits of Software Download ......................................................... A-42
A6.2 Specifications .................................................................................... A-42
A6.3 Preparations for Software Downloading ........................................... A-42
A6.4 Software Download Sequence .......................................................... A-43
A6.5 Download Files .................................................................................. A-43
A6.6 Steps after Activating a Field Device ................................................ A-44
A6.7 Troubleshooting ................................................................................. A-45
A6.8 Resource Block’s Parameters Relating to Software Download ....... A-45
A6.9 System/Network Management VFD Parameters Relating to
Software Download ........................................................................... A-47
A6.10 Comments on System/Network Management VFD Parameters
Relating to Software Download ........................................................ A-48
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