YOKOGAWA GX20 - Page 703

GS 04L53B01-31EN
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All Rights Reserved. Copyright © 2017, Yokogawa Electric Corporation 2017.06.26-00
LoopNumber:
Loop Number; loop 1: 1
loop 2: 2
L x x x
Unit number: GX/GP recorder/GM main unit: 0
GX60 expandable I/O unit/GM sub unit: 1 to 6
Slot number: GX10/GP10: 0 to 2
GX20/GP20 main unit: 0 to 9
GM main unit: 0 to 4
GX60 expandable I/O unit/GM sub unit: 0 to 5
Tag:
Tagstringsandtagnumberscanbeassignedtoloop
numbers.
•Tagstring:upto32characters
 Displayablecharacters:English,Japanese,and
Chinesecharacters
•TagNo.:upto16characters
 Displayablecharacters:Alphanumericandsymbols
PIDChannel:
PIDchannelsareusedtodisplaycontroldataandI/O
dataofPIDcontrolmodulesontrendordigitaldisplays
andsavethedataasrecordeddata.
•PIDchannel:
analog input (AI1/AI2), digital input (DI1 to
DI8), analog output (AO1/AO2), digital output
(DO1 to DO8), control data (PV1/PV2, SP1/
SP2, OUT1/OUT2)
•PIDchannelrecordinginterval:
dependsonthe
recorder’s recording
interval
PIDChannelDisplaySettings:
tag,color,zone,scale,bargraph
Control data; PV1: 01, SP1: 02, OUT1: 03
PV2: 04, SP2: 05, OUT2:06
I/O data; AIN1: 07, AIN2: 08, AO1: 09, AO2: 10
DI1 to DI8: 11 to 18
DO1 to DO8: 19 to 26
x x x x
Unit number: GX/GP recorder/GM main unit: 0
GX60 expandable I/O unit/GM sub unit: 1 to 6
Slot number: GX10/GP10: 0 to 2
GX20/GP20/GM main unit: 0 to 9
GX60 expandable I/O unit/GM sub unit: 0 to 5
NumberofPIDChannels:
ThenumberofchannelsoftheGX90UTmoduleis26
(xed).
WhenchoosingthetypeofGX/GP/GMmainunit
(Standard / Large memory), please calculate it as 26
channelsperoneunit.
ControlFunctions
Control Mode
Selectfromsingleloopcontrol,
*
cascade control, and
loopcontrolwithPVswitching
* Twosingleloopscanrunonasingleunit.(Dual-
loopcontrolispossible.)
NumberofControlLoops
2loops/module(singleloopcontrol×2,cascadecontrol)
1loop/module(loopcontrolwithPVswitching)
 GX/GP/GMsystem(standardtype):6loopsmax.
GX/GP/GMsystem(largememorytype):20loopsmax.
ControlPeriod(InputSamplingPeriod)
100msor200ms(systemglobalsetting)
ControlComputationFunction
•Controltype:PIDcontrol,on/offcontrol
• Target setpoint (SP): up to 8 per loop
• PID parameter: 8 groups/loop
• PID parameter group selection:
Usingtargetsetpointnumbers(SPNO)(PIDnumbers
canbeassignedasyoulike)orsegmentPIDs(during
program control)
UsingPVinputzones(zonePIDs)*
Usingtargetsetpointzones(zonePIDs)*
Usingnaltargetsetpointzones(zonePIDs)*
Externally(usingthecontactinput)
* Ifthedeviationexceedsthereferencedeviation
setpointduringconstantpresetcontrol,thePID
constantswitchesautomaticallytothepresetPID
parameter group.
•ZonePIDswitches:7max.
•PIDdefaultsettingfunction:Thecontrolledtargetcan
besettoaPIDconstantsuitableforthetemperature
orthatsuitableforthepressureorowrate.
• PID control mode:
 xed-pointcontrolmodeorconstantpresetcontrol
•SPlimiterfunction:Ahighlimitorlowlimitcanbeset.
•SPrampratesettingfunction:Arisingramprateor
fallingrampratecanbeset.
•Trackingfunction:
SPtracking,PVtracking
•Auto-tuningfunction
•“Super”function(overshoot-suppressingfunction)
• Anti-reset windup (over-integration prevention
function)
•Presetfunction(whenoperationisstopped)
•Inputerrorpresetfunction
OperationModeSwitching
Remote/local (R/L), auto/manual (A/M), run/stop
(R/S), cascade/auto/manual (CAS/AUTO/MAN), auto
tuning (AT) run/stop