YOKOGAWA GX20 - Page 704

GS 04L53B01-31EN
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All Rights Reserved. Copyright © 2017, Yokogawa Electric Corporation 2017.06.26-00
ControlParameterSettingRange
•Proportionalband(P):0.0to999.9%
• Integral time (I): 0 to 6,000 s
• Derivative time (D): 0 to 6,000 s
•ON/OFFcontrolhysteresis:
0.0to100.0%ofmeasuringrange(highandlowcan
besetseparately)
• Preset output value: -5.0 to 105.0%
• Output limiter setting range: -5.0 to 105.0%
 (limiterlowlimit<limiterhighlimit)
•Normal/reverseoperationswitching:normalor
reverse
•Tightshutfunction:
Whenmanualcontroliscarriedoutwith4to20mA
output,controloutputcanbereducedtoabout0mA.
•Rate-of-changelimiterofoutput:
Offor0.1to100.0%/s
ExternalPV(EXPV)
ExternalPVcanbeturnedonandoff.
AnI/O,math,orcommunicationchannelcanbe
assigned to PV.
EXPVsendperiod:100msto500ms(dependsonthe
systemconguration.)
RemoteSP(RSP)
RemoteSPcanbeturnedonandoff.
AnI/O,math,orcommunicationchannelortheanalog
inputofaPIDcontrolmodulecanbeassignedtoSP.
AlterandratiobiascanbesetontheremoteSP.
Remote SP send period: 100ms to 500ms (depends
onthesystemconguration.)
RetransmissionOutput(AnalogRetransmission)
Function
Outputfunction:currentoutput(reverseoutput
possible)
PV,SP,orOUTcanberetransmittedfromanalog
output.
MathFunction
CP computation (zirconia O2 sensor electromotive
force,CO2partialpressure),specialCLOG.AVE
computation,magicnumber
* Themathfunctionisarecorderoption(/MT).For
details,seethegeneralspecicationsoftheGX/
GP/GM recorder.
AlarmFunction
• Control alarm types
PVhighlimit,PVlowlimit,SPhighlimit,SPlowlimit,
deviationhighlimit,deviationlowlimit,deviationhigh
andlowlimits,deviationwithinhighandlowlimits,
controloutputhighlimit,controloutputlowlimit,PV
rate-of-change
• Alarm action
Standbyaction,relayaction(hold/nonhold,reseton
ACK,normalactiononACK),hysteresis,ON-delay
timer,Off-delaytimer
•Numberofalarmsetpoints:4perloop
•Standbyaction
Turnsoffalarmsfromthestartofcontrol(power-on)
untilastableconditionisreached.
•Hysteresis:Hysteresiscanbesetforeachalarm
setting.
•Display:statusdisplayinthedigitaldisplayareawhen
an alarm occurs. Common alarm display can
beswitchedbetweenholdandnonhold.
OtherFunctions
• Recorder operation
Operation
Operation security settings
Control Event Action
Controlactionorstatusoutputcanbeperformedusing
DI,DO,andinternalswitch.
• Action
All loop control operation start
All loop control operation stop
Controloperationstart/stop(speciedloop)
Auto/manualswitch(speciedloop)
Remote/localswitch(speciedloop)
Autoswitch(speciedloop)
Manualswitch(speciedloop)
Cascadeswitch(speciedloop)
Remoteswitch(speciedloop)
Localswitch(speciedloop)
Hold operation
Advance operation
Program operation start
Program operation stop
Programoperationmodechange
Holdoperation(speciedloop,speciedprogrampattern)
Advanceoperation(speciedloop,speciedprogrampattern)
Programoperationstart(speciedloop,speciedprogram
pattern)
Programoperationstop(speciedloop,speciedprogram
pattern)
Patternnumberswitch(BIN,BCD)
• Status output
•Noticationduringcontroloperation
•Segmentnumber(BIN,BCD)
•Patternnumber(BIN,BCD)
• PROG/RESET monitoring
• Wait end signal (1s, 3s, 5s)
• Pattern end signal (1s, 3s, 5s)
• PV event status
• Time event status
•Waitag
•Hold-onag