Chapter 4 Software index
4-21
Set
frequency priority: Jog
→
Preset frequency
→
External analog frequency signal
Preset
Frequency
Command 3
Set value =004
Preset
Frequency
Command 2
Set value =003
Preset
Frequency
Command 1
Set value =002
Jog frequency
Command
Set value =005
Output
frequency
0 0 0 0 F28
0 0 1 0 F29
0 1 0 0 F30
0 1 1 0 F31
1 0 0 0 F32
1 0 1 0 F33
1 1 0 0 F34
1 1 1 0 F35
X X X 1 F36
F37 DC braking time (s) : 00.0~25.5
F38 DC braking start frequency (Hz) : 01.0~10.0
F39 DC braking level (%) : 00.0~20.0%
F37 / F38: DC braking time and start frequency, per the following figure:
F40 Carrier frequency (KHz) : 004-016
Set this parameter to a level from 4-16KHz as required. (Default is 10 KHz).
*Note: In situations where there is excessive audible noise from the motor or it is required to
reduce electrical noise from the inverter caused by use of long cable then the carrier
frequency can be adjusted as follows:
•
To reduce noise due to long cable decrease carrier frequency.
•
To reduce motor audible noise increase carrier frequency. However the output current from the
inverter will be de-rated according to the table on page 4-24.
•
When output current is over the full load current of inverter, the carrier frequency will be
decreased automatically.
F40
Carrier frequency
F40
Carrier frequency
F40
Carrier frequency
F40
Carrier frequency
004 4KHz 008 8KHz 012
12KHz 016 16KHz
005 5KHz 009 9KHz 013
13KHz
006
6KHz 010 10KHz 014
14KHz
007 7KHz 011 11KHz 015
15KHz
F38
HZ
t
F37
Figure 4-10 DC Injection Braking
t
t
F38
HZ
TM2
DC
Brake
Signal
019
