9-46
9.2.3 C codes (Control functions of frequency)
C01 to C03 Jump Frequencies 1, 2 and 3
C04 Jump Frequency Band
These function codes enable the inverter to jump up to three different points on the output
frequency in order to skip the resonance frequency caused by the motor drive frequency and
natural frequency of the driven mechanism.
- During acceleration, the moment the set frequency reaches the bottom of the set jump
frequency band, the inverter keeps the output at that bottom frequency until the output
frequency reaches the upper limit and proceeds with the acceleration until the next set point is
reached or set speed is reached.
During deceleration, the inverter processes the set jump frequency band in reverse to the
acceleration curve. Refer to the left-hand figure below.
- When the set jump frequency bands overlap, the overlapped band is ignored, the inverter
takes the lowest frequency within the overlapped bands as the bottom frequency and the
highest as the peak. Refer to the right-hand figure below.
Jump frequencies 1,2 and 3 (C01, C02 and C03)
Set the center of the jump frequency band.
- Data setting range: 0.0 to 400.0 (Hz) (Setting to 0.0 results in no jump band)
Jump frequency band (C04)
Set the width of the jump frequency band.
- Data setting range: 0.0 to 30.0 (Hz) (Setting to 0.0 results in no jump band)
C05 to C11 Multistep Frequency Settings 1 to 7
These function codes set frequencies required for driving the motor at frequencies 1 to 7.
- Data setting range: 0.00 to 400.00 (Hz)
- Turning terminal commands (SS1), (SS2) and (SS4) ON/OFF selectively switches the set
frequency of the inverter in 7 steps. For details of the terminal function assignment, refer to
the descriptions for function codes E01 to E03 "Command Assignment to Terminals [X1] to
[X3]."
For the multistep frequency driving, refer to Chapter 4, Section 4.2 "Drive Frequency
Command Generator."
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