11.5 d: References
782 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
The upper frequency limit is set in d2-01 [Frequency Reference Upper Limit] and the lower limit is set in d2-02
[Frequency Reference Lower Limit].
Figure 11.62 Upper and Lower Frequency Limits
■ d2-01: Frequency Reference Upper Limit
No.
(Hex.)
Name Description
Default
(Range)
d2-01
(0289)
Frequency Reference
Upper Limit
Sets maximum limit for all frequency references. This value is a percentage
of E1-04 [Maximum Output Frequency].
100.0%
(0.0 - 110.0%)
When the frequency reference is more than the value set in d2-01 the drive will continue to operate at the value set
in d2-01.
■ d2-02: Frequency Reference Lower Limit
No.
(Hex.)
Name Description
Default
(Range)
d2-02
(028A)
Frequency Reference
Lower Limit
Sets minimum limit for all frequency references. This value is a percentage
of E1-04 [Maximum Output Frequency].
0.0%
(0.0 - 110.0%)
When the frequency reference is less than the value set in d2-02, the drive will continue to operate at the value set
in d2-02. The motor will accelerate to the d2-02 value after the drive receives a Run command and a lower
frequency reference than d2-02 has been entered.
■ d2-03: Analog Frequency Ref Lower Limit
No.
(Hex.)
Name Description
Default
(Range)
d2-03
(0293)
Analog Frequency
Ref Lower Limit
Sets the lower limit of the master frequency reference (Multi-Step Speed 1)
as a percentage of E1-04 [Maximum Output Frequency].
0.0%
(0.0 - 110.0%)
This parameter does not change the lower limit of Jog reference, frequency reference for multi-step speed
operation, or the auxiliary frequency reference.
The drive operates at the value set in d2-03 when the frequency reference decreases to less than the value set in
d2-03.
Note:
When lower limits are set to parameters d2-02 [Frequency Reference Lower Limit] and d2-03, the drive uses the larger value as the
lower limit.
◆ d3: Jump Frequency
The Jump frequency is a function that sets the dead band to a specified frequency band. If a machine that operated
at constant speed is operated with variable speed, it can make resonance. To operate the machine without
resonance from the natural frequency of the machinery mechanical system, use a frequency band jump.
You can program the drive to have three different Jump frequencies. Set d3-01 to d3-03 [Jump Frequencies] to
the median value for the jumped frequency and set d3-04 [Jump Frequency Width] to the Jump frequency width.
When you input a frequency reference that is the same as or near the Jump frequency width, the frequency
reference changes automatically.
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