gefran TPD32-EV-...-4B - Page 291

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P init gain PID Initialproportionalgain.P init gain PID operateswhenfeed-forwardislessthanPI
steady thr andatitsovercoming,forthetimesetinPI steady delay oronthetransition
LtoHofEnable PI PID forthesametime.
I init gain PID Initialintegralgain.I init gain PID operatesafterthethresholdPI steady thr hasbeen
overcomeoronthetransitionLtoHofEnable PI PID forthetimesetinPI steady
delay.
PI central v sel OutputselectorofthestartingPIblock.PI central v sel (0...3)selectsbetweenthe4possible
settingsoftheinitialvalueoftheregulatorintegralcomponent(correspondingtoinitial
diameter).
PI central v sel canbesetdirectlyfromkeypad,seriallineorthroughtwodigitalinputssetrespectivelyasPI
central v S0 and PI central v S1.
SelectingPI central v sel = 0,whenPIblockisdisabled(Enable PI PID =Disable),thelastvalueoftheintegral
componentcalculated(
correspondingto rolldiameter)isstored.ThisvalueisdisplayedinPI output PID.When
enabledagain,theregulationrestartsagainfromthatvalue.Thesamefunctionalityisusedwhenswitchingoff
thedrive.Thiskindofoperationcanbeusedwhencontrollingawinderanditisnecessarytostopthemachine
anddisablethedrivesorevenremoveACincomingpowerfromtheelectricalcabinet.
SelectingPI central v sel =1-2-3,whenPIblockhasbeendisabled,thevalueofPI output PID willbesetat
whatisprogrammedinthecorrespondentparameter(x1000).Whenthedriveisrestartedafterapoweroff,the
precalculatedvaluewillbeautomaticallysetonlyif,whenpoweringupthedrive,thedigitalinputprogrammed
asEnable PI PID isalreadysetatahighlevel.
PI central v 1 Settingoftherstinitialvalueoftheregulator’sintegralcomponent(corresponding
toinitialdiameter1).ThePI central v 1 valuemustbeincludedinthelimitssetin
PI top lim PID andPI bottom lim PID.
PI central v 1 willbeselectedbysettingPI central v sel =1.
PI central v 2 Settingofthesecondinitialvalueoftheregulator’sintegralcomponent(corresponding
toinitialdiameter2).ThePI central v 2 valuemustbeincludedinthelimitssetin
PI top lim PID andPI bottom lim PID.
PI central v 2 willbeselectedbysettingPI central v sel =2.
PI central v 3 Settingofthethirdinitialvalueoftheregulator’sintegralcomponent(correspondent
toinitialdiameter3).ThePI central v 3 valuemustbeincludedinthelimitsgivenby
PI top lim PID andPI bottom lim PID.
PI central v 3 willbeselectedbysettingPI central v sel =3.
PI top lim ItdenesthehigherlimitoftheadaptingblockofthePIcorrection.
PI bottom lim ItdenesthelowerlimitoftheadaptingblockofthePIcorrection.
TheoutputofthePIblockrepresentsthemultiplierfactoroffeed-forward,whosevaluemustbeadaptedfrom
theregulatorinthemax.limitsincludedbetween+10000and-10000anddenedbyPI top lim andPI bottom
lim.Thevalueoftheseparameterswillbedenedaccordingtothesystemthathastobecontrolled.Forabetter
understandingpleaserefertotheparagraph“Examplesofapplication”.
PI integral freeze Freezingofthepresentconditionofregulatorintegralcomponent.
PI output PID OutputofPIblock,adaptedtothevaluesincludedbetweenPI top limit andPI bottom