Curtis Instruments 1238 User Manual


#URTIS-ANUAL/3 
02/'2!--!",%0!2!-%4%23 4HROTTLE0ARAMETERS
4(2/44,%-%.5
  !,,/7!",% 
 0!2!-%4%2 2!.'% $%3#2)04)/.
4HROTTLE4YPE n 4HECONTROLLERSACCEPTAVARIETYOFTHROTTLEINPUTS
4HROTTLE?4YPE n 4HETHROTTLETYPE
PARAMETERCANBEPROGRAMMEDASFOLLOWS
    WIRERHEOSTATKΩnINPUT
    SINGLEENDED
WIREKΩnKΩPOTENTIOMETER  
  OR
n6VOLTAGESOURCE
    WIRERHEOSTATnKΩINPUT

 WIGW
AGWIREKΩnKΩPOTENTIOMETER
  OR
n6VOLTAGESOURCE
    6#,INPUT6#,?4HROTTLE
  .OTE
$O
NOTCHANGETHISPARAMETERWHILETHECONTROLLERISPOWERINGTHE
MOTOR!NYTIMETHISPARAMETERISCHANGEDA0ARAMETER#HANGE&AULT
FAULTCODEISSETANDMUSTBECLEAREDBYCYCLINGPOWERTHISPROTECTS
THECONTROLLERANDTHEOPERATOR
&ORWARD$EADBAND n6 $ElNESTHEWIPERVOLTAGEATTHETHROTTLEDEADBANDTHRESHOLD)NCREASING
&ORWARD?$EADBAND n THETHROTTLEDEADBANDSETTINGWILLINCREASETHENEUTRALRANGE4HIS
PARAMETERISESPECIALLYUSEFULWITHTHROTTLEASSEMBLIESTHATDONOTRELIABLY
RETURNTOAWELLDElNEDNEUTRALPOINTBECAUSEITALLOWSTHEDEADBANDTO
BEDElNEDWIDEENOUGHTOENSURETHATTHECONTROLLERGOESINTONEUTRAL
WHENTHETHROTTLEMECHANISMISRELEASED
&ORWARD-AP n -ODIlESTHEVEHICLESRESPONSETOTHETHROTTLEINPUT3ETTINGTHETHROTTLE
&ORWARD?-AP n MAPATPROVIDESALINEAROUTPUTRESPONSETOTHROTTLEPOSITION6ALUES
BELOWREDUCETHECONTROLLEROUTPUTATLOWTHROTTLESETTINGSPROVIDING
ENHANCEDSLOWSPEEDMANEUVERABILITY6ALUESABOVEGIVETHEVEHICLE
AFASTERMORERESPONSIVEFEELATLOWTHROTTLESETTINGS

4HEMAP
VALUEISTHEPERCENTAGEOFCONTROLLEROUTPUTATHALFTHROTTLE
DEADBANDMAX
&ORWARD-AX n6 $ElNESTHEWIPERVOLTAGEREQUIREDTOPRODUCECONTROLLEROUTPUT
&ORWARD?-AX n $ECREASINGTHETHROTTLEMAXSETTINGREDUCESTHEWIPERVOLTAGEAND
THEREFORETHEFULLSTROKENECESSARYTOPRODUCEFULLCONTROLLEROUTPUT
4HIS
PARAMETER
ALLOWSREDUCEDRANGETHROTTLEASSEMBLIESTOBE
ACCOMMODATED
&ORWAR
D/FFSET
 n $ElNESTHEINITIALCONTROLLEROUTPUTGENERATEDWHENTHETHROTTLEISlRST
&ORWARD?/FFSET n ROTATEDOUTOF
THENEUTRALDEADBAND&ORMOSTVEHICLESASETTINGOF
ISAPPROPRIATE&ORHEAVYVEHICLESHOWEVERINCREASINGTHEOFFSETMAY
IMPROVECONTROLLABILITYBYREDUCINGTHEAMOUNTOFTHROTTLEREQUIREDTOSTART
THEVEHICLEMOVING
.OTE!LLFOURTHROTTLEADJUSTMENTPARAMETERS$EADBAND-AP
-AX/FFSETCONDITIONTHERAWTHROTTLEVOLTAGEINTOASINGLE
THROTTLECOMMANDASSHOWNIN&IGURE
☞

Curtis Instruments 1238 Specifications

General

Brand	Curtis Instruments
Model	1238
Category	Controller
Language	English