H40: Control Mode Select
Range: 0 -3 (Default: 0)
Description: This is to select the control method of the drive.
[V/F]: This is to control the voltage/frequency ratio linearly. It is
recommended to use torque boost function when a larger starting torque is
required.
Related functions:
H26 ~ H27 [Torque Boost]
[Slip compen]: This is used for motor speed regulation. To keep the motor
speed constant, the output frequency varies within the limit of slip
frequency set in FU2-32 according to the load current. For example, when
the motor speed decreases below the reference speed (frequency) due to a
heavy load, the drive increases the output frequency higher than the
reference frequency to increase the motor speed. The drive increases or
decreases the output by delta frequency shown below.
Output frequency = Reference freq. + Delta freq.
z Note: Motor parameters must be set correctly for better performance of
control.
Related Functions:
H30 ~ H37 [Motor Parameters]
[PID]: For HVAC or Pump applications, PID control can be used to adjust
the actual output by comparing a feedback with a ‘Set-point’ given to the
drive. This ‘Set-point’ can be in form of Speed, Temperature, Pressure,
Flow level, etc. Both the ‘Set-point’ and the feedback signals are provided
externally to the drive analog input terminals V1, V2 or I. The drive
compares the signals in calculating ‘total-error’ which is reflected in the
drive output.
95
6 - Parameter Descriptions
Setting Range
Description
Display Select
0 V/F Control V/F Control
1 Slip compensation operation Slip compensation operation
2 PID Feedback control PID Feedback control
3 Sensorless Vector Control Sensorless Vector Control
Delta
Freq.
Rated
slip
Output current - No load current
Rated current - No load current
=
-
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