5.4 d: Reference Settings
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual 157
Parameter Details
5
u 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.
n
d2-01: Frequency Reference Upper Limit
Sets the upper limit for the frequency reference value that is input from frequency reference source 1 (b1-01). The limit
applies to any source selected in parameter b1-01. The value is set as a percentage of the maximum output frequency.
Even if the frequency reference is set to a higher value, the drive internal frequency reference will not exceed this value.
n
d2-02: Frequency Reference Lower Limit
Sets the upper limit for the frequency reference value that is input from frequency reference source 1 (b1-01). The limit
applies to any source selected in parameter b1-01. The value is set as a percentage of the maximum output frequency.
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.
Figure 5.40
Figure 5.40 Frequency Reference: Upper and Lower Limits
n d2-03: Master Speed Reference Lower Limit
This parameter is used to set a lower limit level for the main frequency reference (this setting does not affect the lower
limit level for the jog frequency reference, multi-step speed frequency reference, or auxiliary frequency). The drive will
use the frequency reference set to d2-03 if a frequency reference below the main frequency reference is entered.
Set as a percentage of the maximum output frequency.
Note: When lower limits are set to both the frequency reference (d2-02 or d2-05) and the main frequency reference (d2-03), the drive
uses the greater of those two values as the lower limit.
n d2-04: Frequency Reference 2 Upper Limit
Sets the upper limit for the frequency reference value that is input from frequency reference source 2 (b1-15). The limit
applies to any source selected in parameter b1-15. The value is set as a percentage of the maximum output frequency.
Even if the frequency reference is set to a higher value, the drive internal frequency reference will not exceed this value.
n
d2-05: Frequency Reference 2 Lower Limit
Sets the upper limit for the frequency reference value that is input from frequency reference source 2 (b1-15). The limit
applies to any source selected in parameter b1-15. The value is set as a percentage of the maximum output frequency.
No. Parameter Name Setting Range Default
d2-01 Frequency Reference Upper Limit 0.0 to 110.0% 100.0%
No. Parameter Name Setting Range Default
d2-02 Frequency Reference Lower Limit 0.0 to 110.0% 0.0%
No. Parameter Name Setting Range Default
d2-03 Master Speed Reference Lower Limit 0.0 to 110.0% 0.0%
No. Parameter Name Setting Range Default
d2-04 Frequency Reference 2 Upper Limit 0.0 to 110.0% 100.0%
Internal frequency
reference
d2-01
Operating
range
Frequency Reference Upper Limit
Set frequency reference
Frequency Reference Lower Limit
d2-02
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