Yaskawa AC Drive P1000 Bypass Technical Manual - Manual (Page 108)

u d3: Jump Frequency
n d3-01 to d3-04: Jump Frequencies 1, 2, 3 and Jump Frequency Width
The Jump frequencies are frequency ranges at which the drive will not operate. The drive can be programmed with three
separate Jump frequencies to avoid operating at speeds that cause resonance in driven machinery. If the speed reference falls
within a Jump frequency dead band, the drive will clamp the frequency reference just below the dead band and only accelerate
past it when the frequency reference rises above the upper end of the dead band.
Setting parameters d3-01 through d3-03 to 0.0 Hz disables the Jump frequency function.
No. Parameter Name Setting Range Default
d3-01 Jump Frequency 1 0.0 to 400.0 Hz 0.0 Hz
d3-02 Jump Frequency 2 0.0 to 400.0 Hz 0.0 Hz
d3-03 Jump Frequency 3 0.0 to 400.0 Hz 0.0 Hz
d3-04 Jump Frequency Width 0.0 to 20.0 Hz 1.0 Hz
Figure 5.20 shows the relationship between the Jump frequency and the output frequency.
Frequency
Reference
Output
Frequency
Jump
Frequency
Width (d3-04)
Jump
Frequency 3
d3-03
Jump
Frequency 2
d3-02
Jump
Frequency 1
d3-01
Frequency
reference
decreases Frequency
reference
increases
Jump
Frequency
Width (d3-04)
Jump
Frequency
Width (d3-04)
Figure 5.20 Jump Frequency Operation
Note: 1. The drive will use the active accel/decel time to pass through the specified dead band range, but will not allow continuous operation in
that range.
2. When setting more than one Jump frequency, make sure that the parameters do not overlap.
5.4 d: Reference Settings
108 YASKAWA SIEP YAIP1B 01A YASKAWA AC Drive – P1000 Bypass Technical Manual