gefran TPD32-EV-CU series - Page 301

—————— Instruction manual ——————
301
Input/output
SetAnalog input 1 asinputforthewiperofthedancerpotentiometer.
Analog input 1 / Select input 1= PID Feed-back
SetAnalog input 2 aslinespeedinput(feed-forward).
Tosetthefeed-forwardonanaloginput,seeingthatthisoneisnotdirectlyaccessibleinthelistofhigh-priority
parameters,itisnecessarytopassthroughasupportingparameterPAD 0.....PAD 15.
Analog input 2 / Select input 2 = PAD 0
SetDigital input 1 asenablinginputofPIblockofthePID
Digital input 1 = Enable PI PID
SetDigital input 2 asenablinginputofPDblockofthePID
Digital input 2 = Enable PD PID
Parameters
SetSpeed base value equaltotheratedspeedofthemotor.
Speed base value =3000rpm
SetPID source asPAD 0.
(PAD 0 hasbeenusedassupportingparameterforthefeed-forwardreadingonAnalog input 2)
ForPIDsource,settheparameternumbertowhichitwillbeassociated,choosingitfromthelistofparagraph
10.2.“List of high-priority parameters’(PAD 0 hasthedecimalnumber503).
Toobtainthecorrectvalueitmustbeaddedtothedecimalnumber8192(xedoffset):
PID source=(8192+503)=8695
SetPID source Gain sothatFeed-fwd PID reaches,alongwiththemax.analogvalueonAnaloginput2,85%
ofitsmax.value=10000x85%.
WhenananaloginputissetonaPADparameter,thiswillhaveamax.value+/-2047.
So:
PID source Gain=(maxFeed-fwd PIDx85%)/maxPAD 0=(10000x0.85)/2047=4.153
SetPID target asSpeed ref 1.
note: Whentherampfunctionisenabled,Speed ref 1 isnotavailable.Inordertokeepitavail-
able,itisnecessarytosettheparameterEnable ramp =Disable.
PID target mustbesettotheparameternumbertowhichitwillbeassociated,choosingitfromthelistofpara-
graph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 target=8192+42=8234
SetPID out scale sothat,themax.analogvalueonAnalog input 2 (Feed-fwd PID =8500)andEnable PI
PID andEnable PD PID =Disable,Speed ref 1 isthesameat2550rpm.