4-105
4.2.3 C codes (Control functions)
C01 to C03
C04
Jump Frequency 1, 2 and 3
Jump Frequency (Hysteresis width)
These function codes enable the inverter to jump over three different points on the output frequency in order to
skip resonance caused by the motor speed and natural frequency of the driven machinery (load).
- While increasing the reference frequency, the moment the reference frequency reaches the bottom of the jump
frequency band, the inverter keeps the output at that bottom frequency. When the reference frequency exceeds
the upper limit of the jump frequency band, the internal reference frequency takes on the value of the reference
frequency. When decreasing the reference frequency, the situation will be reversed.
- When more than two jump frequency bands overlap, the inverter actually takes the lowest frequency within the
overlapped bands as the bottom frequency and the highest as the upper limit. Refer to the figure on the lower
right.
Jump frequencies 1, 2 and 3 (C01, C02 and C03)
Data setting range: 0.0 to 500.0 (Hz)
Specify the center of the jump frequency band. (Setting to 0.0 results in no jump frequency band.)
Jump frequency hysteresis width (C04)
Data setting range: 0.0 to 30.0 (Hz)
Specify the jump frequency hysteresis width. (Setting to 0.0 results in no jump frequency band.)
C05 to C19 Multi-frequency 1 to 15
These function codes specify 15 frequencies required for driving the motor at frequencies 1 to 15.
Turning terminal commands
SS1
,
SS2
,
SS4
and
SS8
ON/OFF selectively switches the reference frequency of the
inverter in 15 steps. To use these features, assign
SS1
,
SS2
,
SS4
and
SS8
("Select multi-frequency") to the digital
input terminals with C05 to C19 (data = 0, 1, 2, and 3).