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4-29

Chapter 4

For parameter configuration

[bA120]

～

[bA128]

Overcurrent suppression function setting

Code/Name

Range (unit)

Initial

value

bA120

Overcurrent

suppression enable, 1st-motor

00(Disable)/
01(Enable)

bA121

Overcurrent

suppression level, 1st-motor

Inverter ND rated
current×(0.20

～

2.00)

*1)

*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

Range (unit)

Initial

value

bA122

Overload restriction 1
enable, 1st-motor

00(Disable)/
01(Enable during Acc. and
constant speed)/
02(Constant speed only)/
03(Enable during Acc. and
constant speed-Acc. during
regeneration)

bA123

Overload restriction 1
level, 1st-motor

Inverter rated current
×(0.20

～

2.00)

*2)

bA124

Overload

restriction 1 deceleration
time, 1st-motor

0.10

～

3600.00(s)

1.00

bA126

Overload restriction 2
enable, 1st-motor

00(Disable)/
01(Enable during Acc. and
constant speed)/
02(Constant speed only)/
03(Enable during Acc. and
constant speed - Increase
frequency during
regeneration)

bA127

Overload restriction 2
level, 1st-motor

Inverter rated current
×(0.20

～

2.00)

*2)

bA128

Overload

restriction 2 deceleration
time, 1st-motor

0.10

～

3600.00(s)

1.00

*2) Inverter rated current×1.50

・

When the current is increased, the overload restriction
function reduces the current automatically by lowering
the frequency.

・

Using [OLR] function state, the overload restriction 1
(OFF) and overload restriction 2 (ON) can be used.

[bA-30]

～

[bA145]

Deceleration / stop at power loss (Non-stop)

Code/Name

Range (unit)

Initial value

bA-30

Selection of

deceleration/stop in the
event of a power loss

00(Disable)/
01(Decel. stop)/
02(Decel. stop: with
resume)/
03(Decel. stop:
return to origin)

bA-31

DC voltage trigger

level during power loss

(200V class)

0.0

～

400.0(Vdc)

(400V class)

0.0

～

800.0(Vdc)

(200V class)

220.0

(400V class)

440.0

bA-32

Overvoltage

threshold during power loss

(200V class)

0.0

～

400.0(Vdc)

(400V class)

0.0

～

800.0(Vdc)

(200V class)

360.0

(400V class)

720.0

bA-34

Deceleration time

during power loss

0.01

～

3600.00(s)

1.00

bA-36

Initial output

frequency decrease during
power loss

0.00

～

10.00(Hz))

0.00

bA-37

Proportional gain

for operation at power loss

0.00

～

2.55

0.20

bA-38

Integral time for

operation at power loss

0.000

～

65.535(s)

0.100

・

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 below DC
target level setting [bA-32], the output frequency is
decreased by PI control to put in regenerative mode
and the DC voltage is maintained at [bA-32] target
level.

Overvoltage suppression - deceleration

Code/Name

Range (unit)

Initial value

bA140

Overvoltage suppression
enable, 1st-motor

00(Disable)/
01(DC, constant decel.)
02(Enable acceleration)/
03(Enable Acc. at
constant speed & decel.)

bA141

Overvoltage suppression
level, 1st-motor

(200V class)

330.0

～