Limiting Minimum Frequency - YASKAWA CIMR-G7U Technical Manual



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
Name
Parameter
Number
Display
Frequency
Reference
Lower Limit
d2-02
Ref Lower
Limit
Master Speed
Reference
Lower Limit
d2-03
Ref1 Lower
Limit
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.
Max. output frequency
E1-04
Fig 6.30 Output Frequency Lower Level for Multi-function Analog Input
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.
INFO
Description
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.
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.
Output frequency lower level
0 V
(4 mA)
Speed Limit (Frequency Reference Limit Function)
Change
Setting Factory
during
Range Setting
V/f
Operation
0.0
to 0.0% No A
110.0
0.0
to 0.0% No A
110.0
Multi-function analog input
terminal A2 or A3 input level
10 V
(20 mA)
Control Methods
Open Open
V/f
Loop Flux Loop
with
Vector Vector Vector
PG
1 2
A A A A
A A A A
31
6-