gefran TPD32-EV-500 series - Page 304

—————— TPD32-EV ——————
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Input/output
SetAnalog input 1 asinputfortheloadcellsignal.
Analog input 1 / Select input 1= PID Feed-back
SetAnalog input 2 aslinespeedinput(feed-forward).
Settingthefeed-forwardonanaloginput,seeingitisnotdirectlyinserted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Analog input 3 asinputforthetensionset(PID offset 0).
Analog input 3 / Select input 3 / PID offset 0
SetDigital input 1 asenablinginputofthePIblockofthePID
Digital input 1 = Enable PI PID
SetDigital input 2 asenablinginputofthePDblockofthePID
Digital input 2 = Enable PD PID
Parameters
ProgramSpeed base value equaltotheratedspeedofthemotor.
Speed base value =3000rpm
ProgramPID source asPAD 0.
(PAD 0 hasbeenusedassupportingparameterof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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have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 target=8192+42=8234