gefran TPD32-EV-CU series - Page 491

—————— Instruction manual ——————
491
Thiseventmaybecausedbythefollowing:
 -Fieldisphysicallydisconnectedfromdrive
- DC Curr P basevaluetoolow
 -Enableand/orStartcontactsopen
 -AutotuneprocedureinterruptedfromGF_eXpressviaDisablebuttononControlPanel
 -Failurecausingdisablingofdrive
 Followingtheseevents,parameterP1526issetto4(Nocurrent).
"Tuningaborted" ThismessageisdisplayediftheautotuneprocedureisinterruptedbypressingtheCANC
keyonthekeypad.Themessageremainsdisplayedforafewseconds,afterwhichthe
message"Endcurrtune"isdisplayed.Inaddition,followingthisevent,parameterP1526
issetto3(Aborted).
"Gainscalcerror" Thismessageisdisplayediftheautotuneprocedureencountersproblemsinreading
thebestgains,especiallyintegralgain.ThisistypicallyduetoanexcessivelyhighDC
Curr I basevalue,sothatinthiscaseitisadvisabletolowersuchvalueandrepeatthe
autotuneprocedure.Inaddition,followingthisevent,parameterP1526issetto5(Gain
calcerr).
"DriveFailure" Thismessageisdisplayedifanalarmtripsduringtheautotuneprocedureorispresent
beforeitisrun.Followingthisevent,parameterP1526issetto6(DriveFailure).
"Timeout" Thismessageisdisplayediftheautotuneproceduredoesnotendbythemaximumal-
lowedtime(50minutes).Followingthisevent,parameterP1526issetto7(Timeout).
"SetMaincmd=Dig" Thismessageisdisplayediftheautotuneprocedureislaunchedwithparameter252
Main CommandssettoTerminals.
"SetCtrl=Local" Thismessageisdisplayediftheautotuneprocedureislaunchedwithparameter253
Control modesettoBus.
TheautotuneproceduretriestocalculatethebestvaluesofparametersCD factor P,CD factor I,DC Curr Pand
DC Curr I,whichallowagoodcompromisebetweenfastcurrentdynamicsandlimitedovershoots.Parameter
CD curr thr issetto100.ParameterDC Curr P baseandDC Curr I basearenotchanged.
Notes:
- Ifthenominalcurrentoftheconnectedeldissignicantlybelowthesizeofthedrive,thevaluesofCD
factor PandCD factor Iaresetto1.
- IfthevaluesofDC Curr I or DC Curr I * CD factor Iareequaltoornear100attheendoftheprocedure,
youshouldraisethevalueofDC Curr I base(ifnotalreadyatmaximum)andrepeattheprocedure.Onthe
otherhand,ifDC Curr Iislow(below10),youshouldlowerthevalueofDC Curr I baseandrepeatthe
procedure.
- Insomecases,especiallyifthenominalcurrentoftheeldislessthanhalfthesizeofthedrive,theremay
belengthy(orimprovable)risetimesstartingfromzerocurrentforreferencevaluesbelow100%withgains
settingscalculatedbytheautotuneprocedure.Inthiscase,thesetimesmaybeimprovedasfollows:
a. IncreasethevalueofDC Curr IbychangingCD factor IinordertokeepthevalueofDC Curr I *
CD factor Iconstant.
b. DecreasethevalueofDC Curr PbychangingCD factor PinordertokeepthevalueofDC Curr P
* CD factor Pconstant.