Janson Controls FC100 Series, Manual, Page: 49 / 108

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Parameters from P109 to P114 determine the V / F curve of inverter . Set
corresponding V / F curves according to different loads . Constant torque curve :
application for constant torque load , output voltage and output frequency are in
linear relation .
Down ( variable ) torque curve : application for variable torque load , like fan and
pump . Load will increase with the increase of rotation speed .
High start torque curve : application for heavy load and load need high starting
torque .
P109 : V / F maximum voltage , V / F maximum voltage can be set according to the
motor connected . Generally , it will be set at the rated voltage of motor . When
motor is very near to inverter , usually within 30m , it should be set at a higher
value .
P110 : V / F fundamental frequency
V / F fundamental frequency , please set it at the running voltage frequency of
motor . Generally , do not change V / F fundamental frequency setting ; or else , it is
very likely to damage motor .
P111 : V / F intermediate voltage
Set V / F intermediate voltage according to the specific load . Improper setup can
cause over current of motor or insufficient torque output , or even cause inverter
protection . Increasing the value of P111 can increase output torque and output
current . Please monitor output current while changing the value of P111 . While
changing the value of P111 , adjust the value slowly until the necessary output
torque is reached . Too higher setting may cause inverter protection or fault .
P112 : V / F intermediate frequency
V / F intermediate frequency determines the intermediate point of V / F curve .
Improper setup can cause insufficient torque or over current protection of
inverter
. Generally , do not change the setup value of this parameter while using .
6
Chapter 6 Description of parameter setting
FC100 Series User Manaul