YOKOGAWA UT55A - Page 20

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IM 05P01C31-01EN
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App
Index
8.1.3 Cascade Secondary-loop Control, Cascade Secondary-loop Heating/cooling
Control, and Cascade Secondary-loop Position Proportional Control .............. 8-15
n
Cascade Secondary-loop Control Function Block Diagram ...........................................8-17
n
Cascade Secondary-loop Heating/cooling Control Function Block Diagram .................8-18
n
Cascade Secondary-loop Position Proportional Control Function Block Diagram .........8-21
8.1.4 Cascade Control, Cascade Heating/cooling Control, and Cascade Position
Proportional Control .......................................................................................... 8-23
n
Cascade Control Function Block Diagram .....................................................................8-24
n
Cascade Heating/cooling Control Function Block Diagram ...........................................8-27
n
Cascade Position Proportional Control Function Block Diagram ...................................8-29
8.1.5 Loop Control for Backup, Heating/cooling Loop Control for Backup, and
Position Proportional Loop Control for Backup ................................................. 8-31
n
Loop Control for Backup Function Block Diagram .........................................................8-33
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Heating/cooling Loop Control for Backup Function Block Diagram ...............................8-35
n
Position Proportional Loop Control for Backup Function Block Diagram .......................8-37
8.1.6 LoopControlwithPVSwitching,Heating/coolingLoopControlwithPVSwitching,
andPositionProportionalLoopControlwithPVSwitching
.................................. 8-39
n
LoopControlwithPVSwitchingFunctionBlockDiagram ..............................................8-40
n
Heating/coolingLoopControlwithPVSwitchingFunctionBlockDiagram ....................8-43
n
PositionProportionalLoopControlwithPVSwitchingFunctionBlockDiagram ...........8-45
8.1.7 LoopControlwithPVAuto-selector,Heating/coolingLoopControlwithPV
Auto-selector,andPositionProportionalLoopControlwithPVAuto-selector
.... 8-47
n
LoopControlwithPVAuto-selector(2inputs)FunctionBlockDiagram ........................8-49
n
Heating/coolingLoopControlwithPVAuto-selector(2inputs)FunctionBlockDiagram ....8-51
n
PositionProportionalLoopControlwithPVAuto-selector(2inputs)FunctionBlockDiagram ...8-52
n
LoopControlwithPVAuto-selector(4inputs)FunctionBlockDiagram(onlyforUT55A) ....8-55
n
Heating/coolingLoopControlwithPVAuto-selector(4inputs)FunctionBlockDiagram
(only for UT55A) ............................................................................................................8-57
n
PositionProportional
LoopControlwithPVAuto-selector(4inputs)FunctionBlock
Diagram (only for UT55A) .............................................................................................8-59
8.1.8 LoopControlwithPV-holdFunction,Heating/coolingLoopControlwithPV-hold
Function,andPositionProportionalLoopControlwithPV-holdFunction ....... 8-61
n
LoopControlwithPV-holdFunctionFunctionBlockDiagram .......................................8-63
n
Heating/coolingLoopControlwithPV-holdFunctionFunctionBlockDiagram ..............8-64
n
PositionProportionalLoopControlwithPV-holdFunctionFunctionBlockDiagram .....8-66
8.2 Setting Control Type (CNT) ............................................................................................ 8-68
8.2.1 PID Control ....................................................................................................... 8-69
8.2.2 ON/OFF Control (1 point of hysteresis / 2 points of hysteresis) ....................... 8-70
8.2.3 Heating/cooling Control ....................................................................................
8-72
8.2.4 T
wo-position Two-level Control .........................................................................
8-78
8.2.5 PD Control (Stable Control in Which a Setpoint is not Exceeded) ................... 8-80
8.2.6 Sample PI Control (Controlling a Process with Long Dead
Time) ....................
8-81
8.2.7 Batch PID Control (Performing Control with Rapidly Settling Setpoints) .......... 8-83
8.2.8 Feedforward Control ......................................................................................... 8-85
8.3 Setting PID Control Mode (ALG) .................................................................................... 8-87
8.4 Switching PID ......................................................................................................
........... 8-89
8.4.1 Switching PID
According to Target Setpoint Number (SPNO) ..........................
8-89
8.4.2 SwitchingPIDAccording
toPV ......................................................................... 8-90
8.4.3 Switching PID According to SP ......................................................................... 8-92
8.4.4 Switching PID
According to Target SP ..............................................................
8-94
8.4.5 Switching PID According to Deviation (Reference Deviation) ........................... 8-96
8.4.6 Setting Hysteresis at
Time of PID Switch .........................................................
8-97
8.4.7 Switching PID by Contact Input ........................................................................ 8-97
8.5 Suppressing Overshoot (Super Function) ...................................................................... 8-98
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