D2: Frequency Upper/Lower Limits; D3: Jump Frequency - YASKAWA A1000 Series Technical Manual

5.4 d: Reference Settings

◆ d2: Frequency Upper/Lower Limits

By entering upper or lower frequency limits, the user can keep motor speed from going above or below levels that may
cause resonance or equipment damage.
d2-01: Frequency Reference Upper Limit
■
Sets the maximum frequency reference as a percentage of the maximum output frequency. This limit applies to all
frequency references.
Even if the frequency reference is set to a higher value, the drive internal frequency reference will not exceed this value.
No.
d2-01
d2-02: Frequency Reference Lower Limit
■
Sets the minimum frequency reference as a percentage of the maximum output frequency. This limit applies to all
frequency references.
If a lower reference than this value is entered, the drive will run at the limit set to d2-02. If the drive is started with a
lower reference than d2-02, it will accelerate up to d2-02.
No.
d2-02
Figure 5.43
d2-03: Master Speed Reference Lower Limit
■
Unlike frequency reference lower limit (d2-02) that affects the all frequency references wherever they are sourced from
(i.e., analog input, preset speed, Jog speed, etc.), the master speed lower limit (d2-03) sets a lower limit that will only
affect a frequency reference entered from the analog input terminals (A1, A2, or A3).
Set as a percentage of the maximum output frequency.
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

◆ d3: Jump Frequency

■ d3-01 to d3-04: Jump Frequencies 1, 2, 3 and Jump Frequency Width
To avoid operating at a speed that causes resonance in driven machinery, the drive can be programmed with three
separate Jump frequencies. The Jump frequencies are frequency ranges that the drive will not operate at. 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
182
Parameter Name
Frequency Reference Upper Limit
Parameter Name
Frequency Reference Lower Limit
Internal frequency
reference
d2-01
Operating
range
d2-02
Figure 5.43 Frequency Reference: Upper and Lower Limits
Parameter Name
Master Speed Reference Lower Limit
Parameter Name
Jump Frequency 1
Jump Frequency 2
Jump Frequency 3
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Setting Range
0.0 to 110.0%
Setting Range
0.0 to 110.0%
Frequency Reference Upper Limit
Frequency Reference Lower Limit
Set frequency reference
Setting Range
0.0 to 110.0%
Setting Range
0.0 to 400.0 Hz
0.0 to 400.0 Hz
0.0 to 400.0 Hz
Default
100.0%
Default
0.0%
common_TMonly
Default
0.0%
Default
0.0 Hz
<1> <1>
0.0 Hz
<1> <1>
0.0 Hz
<1> <1>