5-92
F codes
E codes
C codes
P codes
H codes
A codes
b codes
r codes
J codes
d codes
U codes
y codes
Chap. 5 FUNCTION CODES
In the inverter’s low frequency operation, as a substantial error in torque calculation occurs, no low torque can be
detected within the operation range at less than 20% of the base frequency (F04). (In this case, the result of recognition
before entering this operation range is retained.)
The
U-TL signal goes off when the inverter is stopped.
Since the motor parameters are used in the calculation of torque, it is recommended that auto-tuning be applied by
function code P04 to achieve higher accuracy.
E98, E99 Terminal [FWD] Function
Terminal [REV] Function
(Refer to E01 to E07.)
5.2.3 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 you are 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 you are 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, you need to assign
SS1, SS2, SS4 and SS8 ("Select multi-frequency") to the
digital input terminals with C05 to C19 (data = 0, 1, 2, and 3).
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