“A” Group: Standard Functions
Configur
ing Dr
iv
e
P
a
ra
meters
3–20
Derating of DC Braking
– The inverter uses an internal carrier frequency (set by A059) to
generate a DC braking voltage (do not confuse with main inverter output carrier frequency set
by B083). The maximum DC braking force available to the inverter is more limited with higher
DC braking carrier frequency settings for A059 according to the graphs below.
Frequency-
related Functions
Frequency Limits –
Upper and lower
limits can be imposed on the inverter
output frequency. These limits will apply
regardless of the source of the speed
reference. You can configure the lower
frequency limit to be greater than zero as
shown in the graph to the right. The upper
limit must not exceed the rating of the
motor or capability of the machinery.
Max.
braking
ratio (%)
10
20
30
40
50
60
70
3
5
7
9
11
13
DC braking carrier frequency
10
20
30
40
50
60
70
3
5
7
9
(10)
(22)
(34)
(46)
Max.
braking
ratio (%)
DC braking carrier frequency
(10)
(20)
(40)
Models 75 – 150kW
Models 0.4 – 55kW
80
90
100
80
90
100
15
(75)
kHz
10
(60)
kHz
10
20
30
40
50
60
70
3
DC braking
carrier frequency
(35)
Models 185 – 4000kW
80
90
100
kHz
Max.
braking
ratio (%)
Upper
limit
Frequency command
Lower
limit
Settable
range
A061
A062
Output frequency
Func.
Code
Name/
SRW Display
Keypad
Range and settings
Defaults
Run
Mode
Edit
Lo Hi
SRW
OPE
FEF2
FE2
(EU)
FUF2
FU2
(USA)
FF2
F2
(Jpn)
A061
Frequency upper limit setting
0000.00
0.00
Setting is disabled
0.00
0.00
0.00
✘ ✔
Sets a limit on output frequency less
than the maximum frequency (A004)
0000.50
>0.50
Setting is enabled,
0.50 to 400.0 (Hz)
✘ ✔
A261
Frequency upper limit setting, 2nd
motor
0000.00
0.00
Setting is disabled
0.00
0.00
0.00
✘ ✔
Sets a limit on output frequency less
than the maximum frequency (A004)
0000.50
>0.50
Setting is enabled,
0.50 to 400.0 (Hz)
✘ ✔
A062
Frequency lower limit setting
0000.00
0.00
Setting is disabled
0.00
0.00
0.00
✘ ✔
Sets a limit on output frequency
greater than zero
0000.50
>0.50
Setting is enabled,
0.50 to 400.0 (Hz)
✘ ✔
A262
Frequency lower limit setting, 2nd
motor
0000.00
0.00
Setting is disabled
0.00
0.00
0.00
✘ ✔
Sets a limit on output frequency
greater than zero
0000.50
>0.50
Setting is enabled,
0.50 to 400.0 (Hz)
✘ ✔