C Codes (Control Functions) - Fuji Electric FRENIC-HVAC User Manual

6.3.3

C codes (Control functions)

C01 to C03 Jump Frequency 1, 2 and 3
C94 to C96 Jump Frequency 4, 5 and 6,
C04 Jump Frequency (Hysteresis width)
These function codes enable the inverter to jump over six different points on the output
frequency in order to skip resonance caused by the motor speed and natural frequency of the
driven machinery (load).
- When the inverter is 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 the inverter is 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)

Jump frequencies 4, 5 and 6 (C94, C95 and C96) *1

Specify the center of the jump frequency band.
- Data setting range: 0.0 to 120.0 (Hz) (Setting to 0.0 results in no jump frequency band.)
Jump frequency hysteresis width (C04)

Specify the jump frequency hysteresis width.
- Data setting range: 0.0 to 30.0 (Hz) (Setting to 0.0 results in no jump frequency band.)
*1 Jump frecuencies 4 - 6 (C94 - C96) are available at ROM version
C05 to C19 Multistep frequency 1 to 15
These function codes specify 15 frequencies to apply when switching frequencies by turning
terminal commands SS1, SS2, SS4 and SS8 ON or OFF selectively, as listed below.
Using this feature requires assigning SS1, SS2, SS4 and SS8 ("Select multistep frequency")
to digital input terminals (data = 0, 1, 2, and 3) with E01 to E07 beforehand.
Multistep frequency 1 to 15 (C05 through C19)

- Data setting range: 0.00 to 120.00 (Hz)
6.3 Details of Function Codes
6-125
2450 or later.