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Operation Instruction of S900 E Series Inverter
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55
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P113
V/F minimum voltage Initial value : 15
Setting range 0.0 ~ V/F intermediate
voltage
Unit 0.1
P114
V/F minimum frequency Initial value : 1.25
Setting range 0.0 ~ V/F intermediate
frequency
Unit 0.01
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
P109
High starting torque curve
Constant torque curve
Torque dropping curve
F
V
P111
P113
P114
P112
P110
P105