User Manual of EM730/EM730E Series Inverter
258
F15.18
Frequency hopping point 3 0.00-600.00
Hz
600.00
●
F15.19
Hopping range 3
0.00-20.00, 0.00 is
invalid
Hz
0.00
●
The frequency hopping function (FH function for short) can prevent the output frequency
of the inverter from the mechanical resonance frequency point of the mechanical load. If the
inverter is prohibited from running at a constant speed within the frequency hopping range,
hopping will not occur during acceleration. Instead, the inverter will run smoothly.
Time
Set frequency
Frequency
hopping point 3
Frequency
hopping point 2
Frequency
hopping point 1
Hopping range 3
Hopping range 2
Hopping range 1
Fig. 7-35 Schematic Diagram of Frequency Hopping
As shown in Fig. 7-35, the frequency hopping function is set in the form of “frequency
hopping point + hopping range”. The specific frequency hopping range is (frequency hopping
point - hopping range, frequency hopping point + hopping range). At most three frequency
hopping areas can be set. When the respective hopping range is 0, the corresponding frequency
hopping function will be invalid.
When the frequency hopping function is valid and the set frequency rises within the
regulation range, the final set frequency is “frequency hopping point - hopping range”; and
when the frequency hopping function drops, the final set frequency is “frequency hopping point
+ hopping range”.
Multiple frequency hopping areas can be superimposed, as shown in the frequency hopping
areas 1 and 2 in Fig. 7-35. The final frequency hopping range is (frequency hopping point 1 -
hopping range 1, frequency hopping point 2 + hopping range 2).
Function
code
Function code name
Parameter
description
Unit
Default
setting
Attribute
F15.20
Detection
width
of
output
frequency arrival (FAR)
0.00 - 50.00
Hz
2.50
〇
