gefran TPD32-EV-500 series - Page 308

—————— TPD32-EV ——————
308
So:
PID source Gain =(maxFeed-fwd PID x85%)/maxPAD 0 =(10000x0.85)/2047=4.153
ThespeedreferenceofthemotorissetinRPM x4,soprogramasfollows:
PID out scale=(2550x4)/(10000x0.85)=1.2
SetPID target as1Speed ref 1.
note: Whentherampfunctionhasbeenenabled,Speed ref 1isnotavailable.Tokeepitavailable
itisnecessarytosettheparameterEnable ramp=Disable.
ForPID target settheparameternumbertowhichitwillbeassociated,choosingitfromthelistofparagraph
10.2.“List of high-priority parameters”(Speed ref 1 hasthedecimalnumber42).
Toobtainthecorrectvalueitmustbeaddedthedecimalnumber8192(xedoffset):
PID source=(8192+42)=8234
SetPI central v sel =0.
Withthisconguration,havingacorrectionproportionaltothelinespeed,thePIblockisnotabletopositionthe
danceratspeed=0.Inordertodothedrawinginstopconditions,itisnecessarytousethePDblock.
Aspreviouslystated,theproceduredeterminesthetheoricalmultiplierfactor(PI output PID)offeed-forward
asrelationofthediametercalculated.Inordertosendtothedrivethecorrectspeedangularvalue.
note: WhenPI central v sel =0hasbeenselectedandthethePIblockhasbeendisabled,thesystem
keepsinmemory,orresetautomaticallyincaseofswitchingoff,thelastvaluecalculated
for PI output PID.Ifitwouldbenecessarytosetthevalueinordertohaveattheoutputan
incorrectreferenceandsoequaltothefeed-forward,itispossibletocongureadigitalinput
ascorrectionreset.
Socongure:
Digital input 4 = PI central v S0
PI central v 1 =1.00
Bringingthedigitalinputtologicalhighlevel,thePI output PID willbereset.
SetPI top lim andPI bottom lim accordingtotheratiodiameterscoil.
ParametersPI top lim andPI bottom limcanbeconsideredasmultiplierfactors,respectivelymax.andmin.
ofthefeed-forward.
Consideringthattheangularspeedofthemotorandthecorrespondingreference,changeinverselytotheun-
winder/winderdiameter;
Set: PI top lim =1  PI bottom lim =Φ
min
/Φ
max
=100/700=0.14
Belowisanexplanationofabovesettings.
Calculationoftheangularspeedofthemotor:
ωmax.=Vl/(πxΦ
min
xR) and ω
min
=Vl/(πxΦ
max
.xR)
where:
ω
max
=angularspeedofthemotorinconditionsofmin.diameter[rpm]
ω
min
=angularspeedofthemotorinconditionsofmax.diameter[rpm]