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SJ300 Inverter
Configuring Drive
Parameters
3–41
Miscellaneous functions, continued...
B083: Carrier frequency adjustment – The internal switching frequency of the inverter
circuitry (also called the chopper frequency). It is called the carrier frequency because the
lower AC output frequency of the inverter “rides” the carrier. The faint, high-pitched sound
you hear when the inverter is in Run Mode is characteristic of switching power supplies in
general. The carrier frequency is adjustable from 500 Hz to 15 kHz (the upper limit varies,
depending on the inverter rating). The audible sound decreases at the higher frequencies, but
RFI noise and leakage current may be increased. Refer to the specification derating curves in
Chapter 1 to determine the maximum allowable carrier frequency setting for your particular
inverter and environmental conditions.
NOTE: When the inverter is in sensorless vector mode, use B083 to set the carrier frequency
greater than 2.1 kHz for proper operation.
NOTE: The carrier frequency setting must stay within specified limits for inverter-motor appli-
cations that must comply with particular regulatory agencies. For example, a European CE-
approved application requires the inverter carrier to be less than 5 kHz.
B084, B085: Initialization codes – These functions allow you to restore the factory default
settings. Please refer to “
Restoring Factory Default Settings” on page 6–9.
B086: Frequency display scaling – You can convert the output frequency monitor on D001 to
a scaled number (engineering units) monitored at function D007. For example, the motor may
run a conveyor that is monitored in feet per minute. Use this formula:
Scaled output frequency (D007) Output frequency (D001) Factor (B086)×=
“B” Function
Run
Mode
Edit
Lo Hi
Defaults
Units
SRW Display
Func.
Code
Name Description
–FE
(EU)
–FU
(US)
–FR
(JP)
B080 [AM] terminal analog
meter adjustment
Adjust 8-bit gain to analog
meter connected to terminal
[AM], range is 0 to 255
✔ ✔ 180 180 180 —
>b080 AM-MONITOR
ADJUST 180
B081 [FM] terminal analog
meter adjustment
Adjust 8-bit gain to analog
meter connected to terminal
[FM], range is 0 to 255
✔ ✔ 60 60 60 —
>b081 FM-MONITOR
ADJUST 060
B082 Start frequency adjust-
ment
Sets the starting frequency
for the inverter output, range
is 0.10 to 9.99 Hz
✘ ✔ 0.50 0.50 0.50 Hz
>b082 fmin
F 00.50Hz
B083 Carrier frequency
setting
Sets the PWM carrier (inter-
nal switching frequency)
Range is 0.5 to 15.0 kHz, or
0.5 to 10 kHz when derated
✘ ✔ 5.0 5.0 5.0 kHz
>b083 CARRIER
F 05.0kHz
B084 Initialization mode
(parameters or trip
history)
Select the type of initializa-
tion to occur, three option
codes:
00 Trip history clear
01 Parameter initialization
02 Trip history clear and
parameter initialization
✘ ✘ 00 00 00 —
>b084 INITIAL
MODE TRP