B083: Carrier Frequency Adjustment; B084, B085: Initialization Codes; B086: Frequency Display Scaling - Hitachi L300P Series Instruction Manual

Three-phase input 200v class; three-phase input 400v class;
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3–38
"B" Group: Fine-Tuning Functions
Func.
Name
Code
B080 [AM] terminal analog
meter adjustment
B081 [FM] terminal analog
meter adjustment
B082 Start frequency adjust-
ment
B083 Carrier frequency
setting
B084 Initialization mode
(parameters or trip
history)
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 12 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: 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
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)
"B" Function
Description
Adjust 8-bit gain to analog
meter connected to terminal
[AM], range is 0 to 255
Adjust 8-bit gain to analog
meter connected to terminal
[FM], range is 0 to 255
Sets the starting frequency
for the inverter output, range
is 0.10 to 9.99 Hz
Sets the PWM carrier (inter-
nal switching frequency).
Range is 0.5 to 8.0 kHz for
–015xxx to –750xxx models
and 0.5 to 12.0 kHz for
–900Hxx to 1320Hxx
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
=
Output frequency (D001)
Defaults
Run
Mode
Edit
–FE2
–FU2
–FR
Lo Hi
(EU)
(US)
(JP)
✔ ✔
180
180
180
✔ ✔
60
60
60
✘ ✔
0.50
0.50
0.50
✘ ✔
3.0
3.0
3.0
✘ ✘
00
00
00
6–9.
×
Factor (B086)
SRW Display
Units
>b080 AM-MONITOR
ADJUST
180
>b081 FM-MONITOR
ADJUST
060
Hz
>b082 fmin
F
00.50Hz
kHz
>b083 CARRIER
F
05.0kHz
>b084 INITIAL
MODE
TRP

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