Pulse Train Frequency Input - Hitachi SJ700B Series Instruction Manual

Chapter 4 Explanation of Functions

4.3.21 Pulse train frequency input

The pulse train frequency input function allows you to use the
pulse train input via the SAP or SAN terminal as a frequency
command or PID feedback data in each control mode. (You
can use this function in every control mode.)
Specify the input frequency corresponding to the allowable
maximum frequency as the pulse train frequency scale
(P055).
You cannot use the start/end frequency setting function for external analog input together with this function.
To limit the input frequency, specify the desired values for the pulse train frequency bias (P057) and pulse
train frequency limit (P058).
Item
Pulse train frequency scale
Time constant of pulse train
frequency filter
Pulse train frequency bias
Pulse train frequency limit
Frequency source setting
PV source setting
Operation-target frequency
selection 1
Operation-target frequency
selection 2
Frequency
measurement
Function code
P055
P056
P057
P058
A001
A076
A141
A142
Hz %
1
÷
1+sT
Frequency scale
(1.0 to 50.0 kHz)
Primary delay filter
Block diagram for pulse train frequency input
Related code
P055: Pulse-string frequency scale
P056: Time constant of pulse-string frequency filter
P057: Pulse-string frequency bias
P058: Pulse-string frequency limit
A002: Frequency source setting
A076: PV source setting
A141: Operation-target frequency selection 1
A142: Operation-target frequency selection 2
Data or range of data
1.0 to 50.0 (kHz)
0.01 to 2.00 (s)
-100. to +100. (%)
0. to 100. (%)
06
03
05
05
Bias limitation
Limit
%
Bias
Maximum
frequency (F004)
4 - 112
Description
Specification of the input frequency
corresponding to the maximum
allowable frequency
Setting of the filter time constant for
the pulse train input
Settings for the frequency input as a
pulse train
Hz Frequency
command
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