D3: Jump Frequency - YASKAWA AC Drive-A1000 Technical Manual

5.4 d: Reference Settings
n d2-03: Master Speed Reference Lower Limit
Sets a lower limit as a percentage of the maximum output frequency that will only affect a frequency reference entered from
the analog input terminals (A1, A2, or A3). This is unlike parameter d2-02, which affects all frequency references regardless
of their source.
Note: When lower limits are set to both parameters d2-02 and d2-03, the drive uses the greater of those two values as the lower limit.
No.
d2-03
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.
d3-01
d3-02
d3-03
d3-04
<1> In AOLV/PM and CLV/PM control modes, the setting units and range are expressed as a percentage instead of in Hz.
Figure 5.43 shows the relationship between the Jump frequency and the output frequency.
172
Internal frequency
reference
d2-01
Operating
range
d2-02
Figure 5.42 Frequency Reference: Upper and Lower Limits
Parameter Name
Master Speed Reference Lower Limit
Parameter Name
Jump Frequency 1
Jump Frequency 2
Jump Frequency 3
Jump Frequency Width
Frequency Reference Upper Limit
Frequency Reference Lower Limit
Set frequency reference
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Setting Range
0.0 to 110.0%
Setting Range
<1>
0.0 to 400.0 Hz
<1>
0.0 to 400.0 Hz
<1>
0.0 to 400.0 Hz
<1>
0.0 to 20.0 Hz
Default
0.0%
Default
<1>
0.0 Hz
<1>
0.0 Hz
<1>
0.0 Hz
<1>
1.0 Hz