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Power Loss Ridethrough: L2
User constants for power loss ridethroughs are shown in the following table.
Constant
Number
L2-01
L2-02
L2-03
L2-04
L2-06
L2-07
L2-08
L2-09
* The factory setting depends on the Inverter capacity.
-38
5
Name
Description
Display
Momentary power loss
0: Disabled [main circuit
detection
undervoltage (IUV)
detection]
1: Enabled [Restarted when
the power returns within the
time for L2-02. When L2-
02 is exceeded, main circuit
PwrL Selection
undervoltage (IUV) is
detected.]
A backup of the control power
supply is necessary for tempo-
rary power loss compensation.
Momentary power loss
Ridethrough time, when
ridethru time
Momentary Power Loss Selec-
tion (L2-01) is set to 1, in units
PwrL Ridethru t
of seconds.
Min. baseblock time
Sets the Inverter's minimum
baseblock time in units of one
second, when the Inverter is
restarted after power loss ride-
through.
Sets the time to approximately
0.7 times the motor secondary
PwrL Baseblock t
circuit time constant.
When an overcurrent or over-
voltage occurs when starting a
speed search or DC injection
braking, increase the set values.
Voltage recovery time
Sets the time required to return
the Inverter output voltage to
normal voltage at the comple-
tion of a speed search, in units
of one second.
PwrL V/F Ramp t
Sets the time required to
recover from 0 V to the maxi-
mum voltage.
KEB operation
0: Disable
selection
1: Enable
KEB SEL
KEB operation time
Sets the compensation time in
units of seconds when L2-06
(KEB operation selection) is set
KEB Time
to 1.
KEB torque limit
Sets the torque limit integration
integration time
time for KEB operation in units
of milliseconds.
KEB Tlmt Time
KEB AFR gain
Sets the AFR gain for KEB
operation.
KEB K AFR Gain
Change
Setting
Factory
during
Open-
Range
Setting
Operation
loop
Vector
0 or 1
0
No
0.0 to
2.0 s
No
10.0
0.1 to
2.0 s
No
5.0
*
0.0 to
1.5 s
No
10.0
*
No
0 or 1
0
0.0 to
0.3 s
No
1.0
5 to
30 ms
No
1000
0.00 to
2.00
No
10.00
Control
Methods
MEMOBUS
Register
Flux
Vector
A
A
4F0H
A
A
4F1H
A
A
4F2H
A
A
4F3H
A
No
4F5H
A
A
4F6H
A
No
4F7H
A
No
4F8H
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