gefran TPD32-EV-500 series - Page 286

—————— TPD32-EV ——————
286
2. Programming example of the analog input 2 on PID source:
a)  InputprogrammingonaPADparameter
  MenuI/OCONFIG
   ————>Analoginput
    ————>Analoginput2
     ————>Selectinput2=PAD0
b)  SettingofthePAD 0 asfeed-forwardinput:
  MenuOPTION
   ————>PID
    ————>PIDsource
     ————>PIDsource=8695
ThePID source mustbesettotheparameternumbertowhichitwillbeassociated,choosingitfromparagraph
10.2“Listofhigh-priorityparameters’(PAD 0 hasthedecimalnumber503).
Toobtainthevaluemustbeaddedthedecimalvalue8192(xedoffset):
8192+503=8695.
Thefull-scaleofthefeed-forwardislimitedtothevalue+/-10000,whichdependsontheparametersetonPID
source.ItwillbenecessarythecalibrationthroughPID gain source.
Themeasureunitsarethoseindicatedinthenotesattheendoftheparagraph10.2.“Listofthehigh-priority
parameters”.
Thefeed-forwardvaluecanbereadthroughtheparameterFeed-fwd PIDviakeypadorserialline.
Referringtotheaboveexamples
:
1. Programmingexampleoftherampoutputblock(Parameter Ramp out)onPID source:
 SpeedswillbeconvertedinsidethedriveintoRPMx4.
 TherampinputreferencestakeasmaximumsetvaluewhatsetinSpeed base value.
Feed - fwd PID = Speed base value x 4 x PID source gain
 If,withmax.rampreferenceandSpeed base value =3000rpm,tohave
Feed - fwd PID =10000,itisnecessarytoset:
PID source gain =10000/(3000x4)=0.833
2. Programmingforexampleanaloginput2onPID source:
 WhenananaloginputwillbesetonaPAD parameter,thiswillhaveamax.valueof+/-2047.
 Withmax.analogreference,forhavingFeed - fwd PID =10000,itisnecessarytoset:
PID source gain =10000/2047=4.885.
note! Usingtheregulatoras“genericPID”withoutthefeed-forwardfunction,Feed - fwd PID
mustbeatitsmax.value.
 Todothis,itisnecessarytosetPID source on a PADparameterandprogramit=10000.