6-34
Speed Limit (Frequency Reference Limit Func-
tion)
This section explains how to limit the motor speed.
îš‹ Limiting Maximum Output Frequency
If you do not want the motor to rotate above a given frequency, use constant d2-01.
Set the upper limit value of the Inverter output frequency as a percent, taking E1-04 (Maximum Output Fre-
quency) to be 100%.
îš„Related Constants
îš‹ Limiting Minimum Frequency
If you do not want the motor to rotate at below a given frequency, use constants 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).
îš„Related Constants
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vec-
tor
Open
Loop
Vector
2
d2-01
Frequency ref-
erence upper
limit
Set the output frequency upper
limit as a percent, taking the max.
output frequency to be 100%.
0.0 to
110.0
100.0
%
No A A A A A 289H
Ref Upper
Limit
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vec-
tor
Open
Loop
Vector
2
d2-02
Frequency ref-
erence lower
limit
Sets the output frequency lower
limit as a percentage of the maxi-
mum output frequency.
0.0 to
110.0
0.0% No A A A A A 28AH
Ref Lower
Limit
d2-03
Master speed
reference lower
limit
Set the master speed reference
lower limit as a percent, taking
the max. output frequency to be
100%.
0.0 to
110.0
0.0% No A A A A A 293H
Ref1 Lower
Limit
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