Omron 3G3RX Series, User Manual

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4-71
4-2 Function Mode
4
Func
tions
Automatic Carrier Frequency Reduction Function
• This function automatically reduces carrier frequency according to an increase in output current.
• This function is enabled when automatic carrier frequency reduction selection b089 is set to "01".
• When output current exceeds 60%, 72%, 84% and 96% of the rated current, the carrier frequency
is reduced to 12, 9, 6, and 3 kHz, respectively.
When the output current falls below -5% of each level, this function will be reset.
• The carrier frequency reduction rate is 2 kHz per second.
• The upper limit of carrier frequency variable with this function conforms to the set value of carrier
frequency b083, and the lower limit is 3 kHz.
Note: When b083 is 3 kHz or lower, this function is disabled regardless of the b089 setting.
Parameter No. Function name Data Default setting Unit
b089 Automatic carrier reduction
00: Disabled
01: Enabled
00
⎯
Carrier frequency reduction starting level
(Recovery level)
Reduced carrier frequency (kHz)
Less than 60% of the rated current 15.0
60% (55%) of the rated current 12.0
72% (67%) of the rated current 9.0
84% (79%) of the rated current 6.0
96% (91%) of the rated current 3.0
15.0 kHz
60%
Output current (%)
Carrier
frequency
12.0 kHz
9.0 kHz
6.0 kHz
3.0 kHz
72% 84% 96%
0 100 50