Hitachi P1-00080-L Basic Manual page 77

Chapter 4
[bA120]～[bA128]
Overcurrent suppression function setting
Code/Name
bA120
Overcurrent
suppression enable, 1st-motor
bA121
Overcurrent
suppression level, 1st-motor
*1) Inverter ND rated current×1.80
・Overcurrent can be suppressed, but in that case torque
drop can occur. Disable it in cases such as cranes.
Overload restriction function settings
Code/Name
00(Disable)/
01(Enable during Acc. and
bA122
constant speed)/
Overload restriction 1
02(Constant speed only)/
enable, 1st-motor
03(Enable during Acc. and
constant speed-Acc. during
regeneration)
bA123
Inverter rated current
Overload restriction 1
×(0.20～2.00)
level, 1st-motor
bA124
Overload
0.10～3600.00(s)
restriction 1 deceleration
time, 1st-motor
00(Disable)/
01(Enable during Acc. and
constant speed)/
bA126
02(Constant speed only)/
Overload restriction 2
03(Enable during Acc. and
enable, 1st-motor
constant speed - Increase
frequency during
regeneration)
bA127
Inverter rated current
Overload restriction 2
×(0.20～2.00)
level, 1st-motor
bA128
Overload
0.10～3600.00(s)
restriction 2 deceleration
time, 1st-motor
*2) Inverter rated current×1.50
・When the current is increased, the overload restriction
function reduces the current automatically by lowering
the frequency.
Overload restriction level
[bA123]/[bA127]
Output current
Maximum frequency
[Hb105]
[Hd105]
Inverter output
frequency
[bA124]/[bA128]
・Using [OLR] function state, the overload restriction 1
(OFF) and overload restriction 2 (ON) can be used.
Initial
Range (unit)
value
00(Disable)/
00
01(Enable)
Inverter ND rated
*1)
current×(0.20～2.00)
Initial
Range (unit)
value
01
*2)
1.00
00
*2)
1.00
Deceleration according to
the deceleration time at
overload restriction
Reference
frequency
For parameter configuration
Deceleration / stop at power loss (Non-stop)
Code/Name
bA-30
Selection of
deceleration/stop in the
event of a power loss
bA-31
DC voltage trigger
level during power loss
bA-32
Overvoltage
threshold during power loss
bA-34
Deceleration time
during power loss
bA-36
Initial output
frequency decrease during
power loss
bA-37
Proportional gain
for operation at power loss
bA-38
Integral time for
operation at power loss
・If the DC voltage of the main circuit is lower than the
level of [bA-31], the inverter decelerates to create a
regenerative state.
・When [bA-30]=01, if the DC voltage drops, deceleration
starts from the value of the actual frequency command
to the [bA-36], according to the deceleration time
[bA-34]. Once the DC voltage exceeds the [bA-32], the
deceleration is temporally stopped.
・When [bA-30]=02/03, if the DC voltage drops, by
decelerating for a regenerative state, the DC voltage is
maintained at [bA-32]target level decelerating using
the PI control.
Overvoltage suppression - deceleration
Code/Name
bA140
Overvoltage suppression
enable, 1st-motor
bA141
Overvoltage suppression
level, 1st-motor
bA142
Overvoltage
suppression action time,
1st-motor
bA144
Overvoltage
suppression proportional
gain, 1st-motor
bA145
Overvoltage suppression
integral time, 1st-motor
・When [bA140]=01, the deceleration time is increased
until stop so the DC voltage do not cross over the
[bA141] level.
・When [bA140]=02/03, accelerates temporally so the DC
voltage do not cross over [bA141] level.
4-29
[bA-30]～[bA145]
Range (unit) Initial value
00(Disable)/
01(Decel. stop)/
02(Decel. stop: with
resume)/
03(Decel. stop:
return to origin)
(200V class)
(200V class)
0.0～400.0(Vdc) 220.0
(400V class) (400V class)
0.0～800.0(Vdc) 440.0
(200V class)
(200V class)
0.0～400.0(Vdc) 360.0
(400V class) (400V class)
0.0～800.0(Vdc) 720.0
1.00
0.01～3600.00(s)
0.00～10.00(Hz)) 0.00
0.20
0.00～2.55
0.100
0.000～65.535(s)
Range (unit) Initial value
00(Disable)/
01(DC, constant decel.)
02(Enable acceleration)/
03(Enable Acc. at
constant speed & decel.)
(200V class)
(200V class)
330.0～390.0(Vdc)
380
(400V class) (400V class)
760
660.0～780.0(Vdc)
0.00～3600.00(s) 1.00
0.50
0.00～2.55
0.060
0.000～65.535(s)
00
00