SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
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Chapter 4 Explanation of Functions<br />
4.3.21 Pulse train frequency input<br />
The pulse train frequency input function allows you to use the<br />
pulse train input via the SAP or SAN terminal as a frequency<br />
command or PID feedback data in each control mode. (You<br />
can use this function in every control mode.)<br />
Specify the input frequency corresponding to the allowable<br />
maximum frequency as the pulse train frequency scale<br />
(P055).<br />
Related code<br />
P055: Pulse-string frequency scale<br />
P056: Time constant of pulse-string frequency filter<br />
P057: Pulse-string frequency bias<br />
P058: Pulse-string frequency limit<br />
A002: Frequency source setting<br />
A076: PV source setting<br />
A141: Operation-target frequency selection 1<br />
A142: Operation-target frequency selection 2<br />
You cannot use the start/end frequency setting function for external analog input together with this function.<br />
To limit the input frequency, specify the desired values for the pulse train frequency bias (P057) and pulse<br />
train frequency limit (P058).<br />
Item Function code Data or range of data Description<br />
Pulse train frequency scale P055 1.0 to 50.0 (kHz)<br />
Specification of the input frequency<br />
corresponding to the maximum<br />
allowable frequency<br />
Time constant of pulse train<br />
Setting of the filter time constant for<br />
P056 0.01 to 2.00 (s)<br />
frequency filter<br />
the pulse train input<br />
Pulse train frequency bias P057 -100. to +100. (%)<br />
Pulse train frequency limit P058 0. to 100. (%)<br />
Frequency source setting A001 06<br />
PV source setting A076 03<br />
Operation-target frequency<br />
Settings for the frequency input as a<br />
A141 05<br />
selection 1<br />
pulse train<br />
Operation-target frequency<br />
selection 2<br />
A142 05<br />
Bias limitation<br />
Limit<br />
Frequency<br />
measurement<br />
Hz % % Hz<br />
1<br />
÷ 1+sT<br />
Bias<br />
×<br />
Frequency<br />
command<br />
Frequency scale<br />
(1.0 to 50.0 kHz)<br />
Primary delay filter<br />
Maximum<br />
frequency (F004)<br />
Block diagram for pulse train frequency input<br />
4 - 113
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