Speed Limit (Frequency Reference Limit Function)
6-
31
Limiting Minimum Frequency
If you do not want the motor to rotate at below a given frequency, use parameters d2-02 or d2-03.
There are two methods of limiting the minimum frequency, as follows:
•
Adjust the minimum level for all frequencies.
•
Adjust the minimum level for the master speed frequency (i.e., the lower levels of the jog frequency, multi-
step speed frequency, and auxiliary frequency will not be adjusted).
Related Parameters
Adjusting Frequency Lower Limit Using an Analog Input
If you set parameter H3-09 (Multi-function Analog Input Terminal A2 Function Selection) or H3-05 (Multi-
function Analog Input Terminal A3 Function Selection) to 9 (output frequency lower level), you can adjust the
frequency lower level using the terminal A2 input level.
Fig 6.30 Output Frequency Lower Level for Multi-function Analog Input
Parameter
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Operation
Control Methods
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vector
Open
Loop
Vector
2
d2-02
Frequency
Reference
Lower Limit
Determines maximum frequency
reference, set as a percentage of
maximum output frequency
(E1-04). If the frequency
reference is above this value,
actual Drive speed will be limited
to this value. This parameter
applies to all frequency reference
sources.
0.0
to
110.0
0.0%
No
A
A
A
A
A
Ref Lower
Limit
d2-03
Master Speed
Reference
Lower Limit
Determines maximum frequency
reference, set as a percentage of
maximum output frequency (E1-
04). If the frequency reference is
above this value, actual Drive
speed will be limited to this value.
This parameter applies to all
frequency reference sources.
0.0
to
110.0
0.0%
No
A
A
A
A
A
Ref1 Lower
Limit
INFO
If parameter d2-02 and terminal A2 output frequency lower level have been set at the same time, the larger
set value will become the frequency lower limit.
Output frequency lower level
0 V
(4 mA)
Multi-function analog input
terminal A2 or A3 input level
10 V
(20 mA)
Max. output frequency
E1-04
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