6-58
Related Parameters
*
1
In order for a restart to occur, the run command must be maintained throughout the ride thru period.
*2 Factory settings will vary based on drive capacity (values given here are for 200-240V class, 0.4kW).
*3 Setting value for 200-240V class. Double the value when working with 380-480V class drives
.
Setting Precautions
• Error output signals are not output during momentary power loss recovery.
• To continue Drive operation after power has been restored, make settings so that run commands from the
control main circuit terminal are stored even while power is suspended.
• If the momentary power loss operation selection is set to 0 (Disabled), when the momentary power loss
exceeds 15ms during operation, alarm UV1 (main circuit undervoltage) will be detected.
Parameter
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Operation
Control Methods
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vector
Open
Loop
Vector
2
L2-01
Momentary
Power Loss
Detection
Selection
Enables and disables the
momentary power loss function.
0: Disabled - Drive trips on (UV1)
fault when power is lost.
1: Power Loss Ride Thru
Time - Drive will restart if power
returns within the time set in
L2-02.*
1
2: CPU Power Active - Drive will
restart if power returns prior to
control power supply shut
down.*
1
0 to 2 0 NoAAAAA
PwrL
Selection
L2-02
Momentary
Power Loss
Ride-thru
Time
Sets the power loss ride-thru time.
This value is dependent on the
capacity of the Drive. Only
effective when L2-01 = 1.
0 to 25.5
0.1sec
*2
NoAAAAA
PwrL
Ridethru t
L2-03
Momentary
Power Loss
Minimum
Base Block
Time
Sets the minimum time to wait to
allow the residual motor voltage to
decay before the Drive output turns
back on during power loss ride thru.
After a power loss, if L2-03 is
greater than L2-02, operation
resumes after the time set in L2-03.
0.1
to
5.0
0.2sec
*2
NoAAAAA
PwrL
Baseblock t
L2-04
Momentary
Power Loss
Voltage
Recovery
Ramp Time
Sets the time it takes the output
voltage to return to the preset V/f
pattern after speed search (current
detection mode) is complete.
0.0
to
5.0
0.3sec
*2
NoAAAAA
PwrL V/F
Ramp t
L2-05
Undervoltage
Detection
Level
Sets the Drive's DC Bus
undervoltage trip level. If this is set
lower than the factory setting,
additional AC input reactance or
DC bus reactance may be necessary.
Consult the factory before changing
this parameter setting.
150
to
210
*3
190Vdc
*3
NoAAAAA
PUV Det
Level
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