Hitachi SJ Series User Manual page 439

Chapter 12 Chapter 12
Examples of restarting when resetting Examples of restarting when resetting Examples of restarting when resetting Examples of restarting when resetting
Example 5) When frequency adjustment restarting is Example 5) When frequency adjustment restarting is Example 5) When frequency adjustment restarting is Example 5) When frequency adjustment restarting is Example 5) When frequency adjustment restarting is Example 5) When frequency adjustment restarting is
selected ([bb-41]=01) selected ([bb selected ([bb
Power
ON
supply
FW input
ON
Motor
Frequency Frequency
Example 6) When frequency acquisition restarting is Example 6) When frequency acquisition restarting is Example 6) When frequency acquisition restarting is Example 6) When frequency acquisition restarting is Example 6) When frequency acquisition restarting is Example 6) When frequency acquisition restarting is
selected ([bb selected ([bb selected ([bb-41]=02)
FW input
RS input
Tripped
Output
Inverter
Output
frequency
Motor
Frequency
OFF ON ON
Frequency
Free running Free running
adjustment
[bb-43] 43]
Deceleration in Deceleration in
accordance with accordance with
[bb-44]
Frequency determined Frequency determined Frequency determined
by [bb by [bb-47]
Deceleration rate of Deceleration rate of Deceleration rate of
[bb-26]
[bb-44] [bb
Ａ Ａ
• In the "Reset restarting selection [bb In the "Reset restarting selection [bb In the "Reset restarting selection [bb In the "Reset restarting selection [bb-41]," selecting
"01 (frequency adjustment restarting)" allows you to "01 (frequency adjustment restarting)" allows you to "01 (frequency adjustment restarting)" allows you to "01 (frequency adjustment restarting)" allows you to "01 (frequency adjustment restarting)" allows you to "01 (frequency adjustment restarting)" allows you to
perform the frequency adjustment restarting when perform the frequency adjustment restarting when perform the frequency adjustment restarting when perform the frequency adjustment restarting when perform the frequency adjustment restarting when perform the frequency adjustment restarting when
turning on the power supply again. When "00 turning on the power supply again. When "00 turning on the power supply again. When "00 turning on the power supply again. When "00 turning on the power supply again. When "00
(Restarting with 0 Hz)" is set, the operation starts (Restarting with 0 Hz)" is set, the operation starts (Restarting with 0 Hz)" is set, the operation starts (Restarting with 0 Hz)" is set, the operation starts (Restarting with 0 Hz)" is set, the operation starts
from 0 Hz without waiting for the "Retry stand fr om 0 Hz without waiting for the "Retry stand om 0 Hz without waiting for the "Retry stand-by om 0 Hz without waiting for the "Retry stand
time for time for
instantaneous power failure and insufficient instantaneous power failure and insufficient instantaneous power failure and insufficient instantaneous power failure and insufficient
[bb-26]." 26]."
voltage voltage
！ ！
• Even when the frequency adjustment restarting is Even when the frequency adjustment restarting is Even when the frequency adjustment restarting is Even when the frequency adjustment restarting is Even when the frequency adjustment restarting is Even when the frequency adjustment restarting is
selected, the "Restarting with 0 Hz" occurs in the selected, the "Restarting with 0 Hz" occurs in the selected, the "Restarting with 0 Hz" occurs in the selected, the "Restarting with 0 Hz" occurs in the selected, the "Restarting with 0 Hz" occurs in the
cases shown below. cases shown below. cases shown below.
- When an output frequency is 1/2 of a base an output frequency is 1/2 of a base an output frequency is 1/2 of a base an output frequency is 1/2 of a base
frequency or below frequency or below
- When the induced voltage of the motor quickly When the induced voltage of the motor quickly When the induced voltage of the motor quickly When the induced voltage of the motor quickly
attenuates
- When the "Lower limit setting for frequency When the "Lower limit setting for frequency When the "Lower limit setting for frequency When the "Lower limit setting for frequency
adjustment [bb-42]" is set, and a frequency equal adjustment [bb
to or below this set frequency is detected to or below this set frequency is detected to or below this set frequency is detected to or below this set frequency is detected
Ａ Ａ
• After the "Retry stand-by time for After the "Retry stand
power failure and insufficient voltage power failure and insufficient voltage power failure and insufficient voltage
elapsed, the output starts at a frequency elapsed, the output starts at a frequency elapsed, the output starts at a frequency elapsed, the output starts at a frequency
conforming to the "Constant (frequency) for conforming to the "Constant (frequency) for conforming to the "Constant (frequency) for conforming to the "Constant (frequency) for
frequency acquisition restarting frequency acquisition restarting frequency acquisition restarting
during a time of the "Constant (voltage) for a time of the "Constant (voltage) for a time of the "Constant (voltage) for a time of the "Constant (voltage) for
restarting [bb-45]," the motor speed is acquired. restarting [bb
At that time, to reduce the output current with the At that time, to reduce the output current with the At that time, to reduce the output current with the At that time, to reduce the output current with the At that time, to reduce the output current with the
"Restarting level of acquisition [bb "Restarting level of acquisition [bb "Restarting level of acquisition [bb-43],"
deceleration occurs in accordance with the deceleration occurs in accordance with the deceleration occurs in accordance with the deceleration occurs in accordance with the
"Constant (frequency) for res "Constant (frequency) for res "Constant (frequency) for restarting [bb
• When the output current lowers below the When the output current lowers below the When the output current lowers below the When the output current lowers below the
"Restarting level of acquisition [bb "Restarting level of acquisition [bb "Restarting level of acquisition [bb-43],"
acceleration starts. If a trip occurs due to an acceleration starts. If a trip occurs due to an acceleration starts. If a trip occurs due to an acceleration starts. If a trip occurs due to an
excessive current even in this method, lower the excessive current even in this method, lower the excessive current even in this method, lower the excessive current even in this method, lower the excessive current even in this method, lower the
"Restarting level of acquisition [bb "Restarting level of acquisition [bb "Restarting level of acquisition [bb-43]" or the
"Excessive current prevention level [bb sive current prevention level [bb-46]." sive current prevention level [bb sive current prevention level [bb
！ ！
• When the "Start frequency selection [bb When the "Start frequency selection [bb-47]" is When the "Start frequency selection [bb When the "Start frequency selection [bb
set to "00 (Frequency at the time of interruption)," set to "00 (Frequency at the time of interruption)," set to "00 (Frequency at the time of interruption)," set to "00 (Frequency at the time of interruption)," set to "00 (Frequency at the time of interruption),"
the operation starts at a frequency at the time of the operation starts at a frequency at the time of the operation starts at a frequency at the time of the operation starts at a frequency at the time of the operation starts at a frequency at the time of
the previous interruption even when a reset the previous interruption even when a reset the previous interruption even when a reset the previous interruption even when a reset
signal is input during retry stand input during retry stand input during retry stand-by.
12-24-8 8
About the inverter function About the inverter function About the inverter function About the inverter function
41]," selecting 41]," selecting
42]" is set, and a frequency equal 42]" is set, and a frequency equal 42]" is set, and a frequency equal
by time for
instantaneous instantaneous
[bb-26]" has [bb
[bb-44]." After that, 44]." After that, 44]." After that,
45]," the motor speed is acquired. 45]," the motor speed is acquired. 45]," the motor speed is acquired.
43],"
tarting [bb-44]."
43],"
43]" or the