In Fig.6-8,the inflection points are set the same as
the corresponding relationship of Min. or Max
reference.
Fig.6-8 Freq. corresponding to Min. frequency
Analog input value (A) is a percentage without unit,
and 100% corresponds to 10V or 20mA. Pulse
frequency (P) is also a percentage without unit, and
100% corresponds to the Max pulse frequency
defined by A6.10.
The time constant of the filter used by the reference
selector is defined in Group A6.
A3.00 is used to select the analog input curve and
pulse input curve, as show in Fig.6-9.
Fig.6-9 Frequency curve selection
For example, the requirements are:
1.Use the pulse signal input via terminal to set the
reference frequency;
2.Range of input signal frequency:1kHz~20kHz;
3.1kHz input signal corresponds to 50Hz reference
frequency, and 8kHz input signal corresponds to
10Hz reference frequency, 12kHz input signal
corresponds to 40Hz reference frequency,20kHz
input signal corresponds to 5Hz reference
frequency. According to the above requirements,
the parameter
settings are:
1)A0.02=4,select pulse input to set the reference
frequency.
3)A3.00=3000,select curve 4.
4 ) A6.10 = 20.0kHz , set the Max. input pulse
frequency to 20kHz.
5)A3.13=20÷20×100%=100.0%,the maximum
reference of curve 4 is actually the percentage of
20kHz to 20kHz(A6.10).
6)A3.14=5.00Hz÷A0.08*100%, set the percentage
of frequency that corresponds to the Max. reference
(20kHz pulse signal).
7)A3.15=12÷20×100%=60.0%,the reference of
inflection 2 of curve 4 is actually the percentage of
12kHz to 20kHz(A6.10).
8 ) A3.16 = 40.00Hz÷A0.08*100 % , set the
percentage of frequency that corresponds to the
reference of inflection 2 of curve 4 (12kHz pulse
signal).
9)A3.17=8÷20×100%=40.0%,the reference of
inflection 1 of curve 4 is actually the percentage of
8kHz to 20kHz(A6.10).
10 ) A3.18 = 10.00Hz÷A0.08*100 % , set the
percentage of frequency that corresponds to the
reference of inflection 1 of curve 4 (8kHz).
11)A3.19=1÷20×100%=5.0%,the Min. reference
of curve 4 is actually the percentage of 1kHz to
20kHz(A6.10).
12 ) A3.20 = 50.00Hz÷A0.08*100 % , set the
percentage of frequency that corresponds to the
Min. reference (1kHz pulse signal).