Hitachi SJ Series, User Manual

Page: 174 / 786

12-4-5
Chapter 12 Inverter Functions
12.4.6 Making command from pulse string
input
Input terminals [A] and [B] of the main body are
used.
• Want to make a frequency command from the
frequency given in a pulse string of the open
collector.
• To use the input terminals [A] and [B] of the main
body as a pulse string input frequency command,
set [CA-90] to be 01: command.
• A pulse string given as input to the input terminals
[A] and [B] of the inverter is used.
• A pulse string given as input to the input terminals
[A] and [B] can be used as a frequency command /
PID feedback value in each control mode.
• Set an input pulse frequency that corresponds to
the maximum frequency to the pulse string
frequency scale [CA-92].
• The pulse string input values to the input terminals
[A] and [B] can be monitored with [dA-70].
Parameters (main body)
Monitor (main body)
*To give a pulse string input frequency command,
there are two methods. One is to use the main
body’s terminals and the other is to use the optional
P1-FB.
• Start/End function of analogue input cannot be
used. To limit the pulse string input frequency, use
the pulse string frequency bias size [CA-94], the
pulse string frequency upper detection limit [CA-95],
and the pulse string frequency lower detection limit
[CA-96]
• When the pulse input frequency is below the pulse
string frequency lower detection limit [CA-96], it is
regarded as 0 Hz in the processing.
• Slow start if the pulse string frequency lower
detection limit [CA-96] is set to a high value.
Item Parameters Data Description
Main speed command
selection
[AA101] 12
Frequency command from pulse string input
(input terminals [A] and [B])
Pulse string input (main
body) detection target
selection
[CA-90] 01 Used for frequency command
Pulse string input (main
body) mode selection
[CA-91]
00 Mode 0: 90° phase difference pulse string
01
Mode 1: Forward/Reverse rotation command and
rotation direction
02
Mode 2: Forward rotation pulse string and
reverse rotation pulse string
Pulse string frequency
(main body) scale
[CA-92] 0.05~32.00 (kHz)
Input a pulse string frequency that corresponds to
the maximum frequency.
Pulse string frequency
(main body) filter time
constant
[CA-93] 0.01~2.00 (sec)
A filter is applied to the input of the pulse string
frequency.
Pulse string frequency
(main body) bias size
[CA-94] -100.0~100.0(%)
A bias is applied to the input of the pulse string
frequency.
Pulse string frequency
(main body) upper
detection limit
[CA-95] 0.0~100.0 (%)
The output of the pulse string frequency input is
limited.
Pulse string frequency
(main body) lower
detection limit
[CA-96] 0.0~100.0 (%)
In outputting the pulse string frequency input,
pulses with the frequency lower than the limit is
set to 0.0%.
Item Parameters Data Description
Pulse string input
monitor (main body)
[dA-70] -100.00~100.00(%)
The frequency command from the pulse
string input (input terminals A/B) is
displayed.
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