E6581611
F-39
6
6.10.3 Fine adjustment of analog frequency command
f470 : VIA input bias f473 : VIB input gain
f471 : VIA input gain f474 : VIC input bias
f472 : VIB input bias f475 : VIC input gain
Function
These parameters are used to fine adjust the relation between the frequency command input through
the analog input terminal VIA, VIB, VIC and the output frequency.
Use these parameters to make fine adjustments after making rough adjustments using the
parameters f201 to f204, f210 to f213, f216 to f219
The figure below shows the characteristic of the frequency command input through the VI terminal and that of
the output frequency.
* Bias adjustment of analog input terminal (f470, f472, f474)
Decrease the value in case frequency is output even though the frequency command is 0 (zero) Hz.
* Gain adjustment of analog input terminal (f471, f473, f475)
Increase the value in case the output frequency doesn’t reach the maximum frequency even though the
maximum voltage and current are applied.
Default setting
Large
Small
Maximum frequency
Output frequency (Hz)
100%
10Vdc
20mAdc
0%
0V
4mA
0
Frequency setting signal（ VI input value）
Large
Small
f472
f474
f473
f475
(Analog input value)
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