Power loss ridethrough: l2 – Yaskawa G7 Drive User Manual
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Power Loss Ridethrough: L2
User parameters for power loss ridethroughs are shown in the following table.
Parameter
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Operation
Control Methods
MODBUS
Register
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.*
2: CPU Power Active - Drive
will restart if power returns
prior to control power
supply shut down.*
* In order for a restart to occur,
the run command must be
maintained throughout the
ride thru period.
0 to 2
0
No
A
A
A
A
A
485H
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
*1
No
A
A
A
A
A
486H
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
*1
No
A
A
A
A
A
487H
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
*1
No
A
A
A
A
A
488H
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
*2
190 V
*2
No
A
A
A
A
A
489H
PUV Det
Level