Hitachi L300P Series Instruction Manual page 101

"B" Function
Func.
Name
Code
B002 Allowable under-
voltage power failure
time
B003 Retry wait time before
motor restart
B004 Instantaneous power
failure / under-voltage
trip alarm enable
B005 Number of restarts on
power failure / under-
voltage trip events
B006 Phase loss detection
enable
B007 Restart frequency
threshold
Electronic
Thermal Overload
Alarm Setting
Description
The amount of time a power
input under-voltage can
occur without tripping the
power failure alarm. If
under-voltage exists longer
than this time, the inverter
trips, even if the restart
mode is selected. If it exists
less than this time retry will
be attempted. Range is 0.3 to
25.0 sec.
Time delay after a trip
condition goes away before
the inverter restarts the
motor.
Range is 0.3 to 100 seconds.
Three option codes:
00 Disable
01 Enable
02 Disable during stop and
ramp to stop
Two option codes:
00 Restart 16 times
01 Always restart
Two option codes:
00 Disable – no trip on
phase loss
01 Enable – trip on phase
loss
When the frequency of the
motor is less than this value,
the inverter will restart at
0 Hz.
Range is 0.00 to 400.0 Hz
CAUTION: When a loss of phase occurs, increased ripple current will markedly reduce main
capacitor life over time. Diode bridge failure can also result. If phase loss occurs under load,
the inverter could be damaged. Please pay particular attention to the setting of function B006.
The thermal overload detection protects
the inverter and motor from overheating
due to an excessive load. It uses a current/
inverse time curve to determine the trip
point. The thermal overload alarm [THM]
is the resulting intelligent output.
First, use B013 to select the torque
characteristic that matches your load.
This allows the inverter to utilize the best
thermal overload characteristic for your
application.
Defaults
Run
Mode
Edit
–FE2 –FU2 –FR
Lo Hi
(EU) (US) (JP)
✘ ✔
1.0 1.0 1.0
✘ ✔
1.0 1.0 1.0
✘ ✔
00 00 00
✘ ✔
00 00 00
✘ ✔
00 00 00
✘ ✔
0.00 0.00 0.00
Trip current
reduction
factor
Constant torque
x 1.0
x 0.8
Reduced
x 0.6
0 5 20
3–29
L300P Inverter
SRW Display
Units
sec. >b002 IPS
TIME 1.0s
sec. >b003 IPS
WAIT 001.0s
— >b004 IPS
TRIP OFF
—
>b005 IPS
RETRY 16
— >b006 PH-FAIL
SELECT OFF
Hz >b007 IPS
F 0000.00Hz
B013=01
B013=00
torque
Hz
60 120
Output frequency