“B” Group: Fine-Tuning Functions
Configur
ing Dr
iv
e
P
a
ra
meters
3–44
Window
Comparators
The window comparator function controls digital outputs based on the comparison of analog
input values to user-defined upper and lower limits.
Miscellaneous
Functions
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
applications that must comply with particular regulatory agencies. For example, a European
CE-approved application requires the inverter carrier to be less than 5 kHz.
Func.
Code
Name/
Description
Keypad
Range and Settings
Defaults
Run
Mode
Edit
Lo Hi
SRW
OPE
xFE2
(EU)
xFU2
(USA)
xFF2
(Jpn)
B060
[O] input maximum limit level of window comparator
0. to 100. (%)
Lower limit = B061 + B062 x 2
100
100
100
✘ ✔
B061
[O] input minimum limit level of window comparator
0. to 100. (%)
Lower limit = B060 – B062 x 2
0
0
0
✘ ✔
B062
[O] input hysteresis width of window comparator
0. to 10. (%)
Lower limit = B061 – B062 x 2
0
0
0
✘ ✔
B063
[OI] input maximum limit level of window comparator
0. to 100. (%)
Lower limit = B064 + B066 x 2
100
100
100
✘ ✔
B064
[OI] input minimum limit level of window comparator
0. to 100. (%)
Lower limit = B063 – B066 x 2
0
0
0
✘ ✔
B065
[OI] input hysteresis width of window comparator
0. to 10. (%)
Lower limit = B063 – B064 x 2
0
0
0
✘ ✔
B066
[O2] input maximum limit level of window comparator
–100. to 100. (%)
Lower limit = B067 + B068 x 2
100
100
100
✘ ✔
B067
[O2] input minimum limit level of window comparator
–100. to 100. (%)
Lower limit = B066 – B068 x 2
-100
-100
-100
✘ ✔
B068
[O2] input hysteresis width of window comparator
0. to 10. (%)
Lower limit = B066 – B067 x 2
0
0
0
✘ ✔
B070
[O] input disconnect threshold
—
—
0 to 100 (%)
255
255
255
✘ ✔
no
255
Ignore setting
✘ ✔
B071
[OI] input disconnect threshold
—
—
0 to 100 (%)
255
255
255
✘ ✔
no
255
Ignore setting
✘ ✔
B072
[O2] input disconnect threshold
—
—
0 to 100 (%)
127
127
127
✘ ✔
no
127
Ignore setting
✘ ✔
