Hitachi SJ Series, User Manual

Page: 176 / 786

12-4-7
Chapter 12 Inverter Functions
Use of optional cassette P1-FB
• Want to make a frequency command from the
frequency given in a pulse string of the line driver.
• The pulse string given in [SAP][SBP][SAN][SBN] of
the optional cassette P1-FB (feedback option) is
used.
• A pulse string given as input to P1-FB 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 [ob-12].
• The pulse string input values to P1-FB can be
monitored with [dA-71].
Parameters (main body)
Monitor (main body)
• Start/End function of analogue input cannot be
used. To limit the pulse string input frequency, use
the pulse string frequency bias size [ob-14], the
pulse string frequency upper detection limit [ob-15],
and the pulse string frequency lower detection limit
[ob-16]
• When the pulse input frequency is below the pulse
string frequency lower detection limit [ob-16], it is
regarded as 0 Hz in the processing.
• Slow start if the pulse string frequency lower
detection limit [ob-16] is set to a high value.
Item Parameters Data Description
Main speed command
selection
[AA101] 13
Frequency command from optional P1-FB
enabled.
Pulse string input
(option) detection
target selection
[ob-10] 01 Used for frequency command
Pulse string input
(option) mode
selection
[ob-11]
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
(option) scale
[ob-12] 0.05~200.0 (kHz)
A pulse string frequency equivalent to the
maximum frequency is given.
Pulse string frequency
(option) filter time
constant
[ob-13] 0.01~2.00 (sec)
A filter is applied to the input of the pulse
string frequency.
Pulse string frequency
(option) bias size
[ob-14] -100.0~100.0(%)
A bias is applied to the input of the pulse
string frequency.
Pulse string frequency
(option) upper
detection limit
[ob-15] 0.0~100.0 (%)
The output of the pulse string frequency
input is limited.
Pulse string frequency
(option) lower
detection limit
[ob-16] 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 (option)
[dA-71] -100.00~100.00(%)
Frequency command from pulse string input
(option input A phase / B phase)
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