74
4. Parameter description
Parameter
Example 2: This example shows the influence of changing the bias. When the input is 0V the output
frequency is 10 Hz. At mid-point a potentiometer will give 40 Hz. Once the Maximum
Output Frequency is reached, any further increase of the potentiometer or signal will not
increase the output frequency. (To use the full potentiometer range, please refer to
Example 3.) The value of external input voltage/current 0~8.33V corresponds to the
setting frequency 10~60Hz.
0V
5V
10V
0Hz
60Hz
30Hz
10Hz
Bias
adjustment
P.139 =
10Hz
P.38
* 100%
Max output
frequency
Parameter setting:
P.38 = 60Hz
Max operation frequency
P.139 = 16.7%
Bias adjustment
P.140 = 100% Gain adjustment
P.141 = 0 Positive Bias
P.73 = 1 Voltage signal selection
Example 3: This example also shows a popular method. The whole scale of the potentiometer can be
used as desired.
P.140 =
P.38
) * 100%
0V
5V
10V
0Hz
60Hz
30Hz
10Hz
( 1
10Hz
P.139 =
10Hz
P.38*P.140
* 100%
Max output
frequency
Bias
adjustment
Parameter setting:
P.38 = 60Hz
Max operation frequency
P.139 =20%
Bias adjustment
P.140 = 83.3% Gain adjustment
P.141 = 0 Positive Bias
P.73 = 1 Voltage signal selection
Example 4: This example shows a potentiometer range of 0V to 5 V. Instead of adjusting gain as
example below, you can set P.38 to 120Hz or P.73 to 0 to achieve the same results.
10V
5V
0V
30Hz
60Hz
0Hz
Gain
adjustment
P.140 =
10V
5V
* 100% = 200%
Max output
frequency
Parameter setting:
P.38 = 60Hz
Max operation frequency
P.139 =0%
Bias adjustment
P.140 = 200% Gain adjustment
P.141 = 0 Positive Bias
P.73 = 1 Voltage signal selection
