6
-52
Continuing
Operation
This
section explains functions for continuing or automatically restarting Inverter operation even if an
error
occurs.
K
K
K
K
Restarting
Automatically
After
Power
Is
Restored
Even
if a temporary power loss occurs, you can restart the Inverter automatically after power is restored to
continue
motor operation.
To
restart the Inverter after power is restored, set L2-01 to 1 or 2.
If
L2-01 is set to 1, when power is restored within the time set in L2-02, the Inverter will restart. If the time set
in
L2-02 is exceeded, alarm UV1 (main circuit undervoltage) will be detected.
If
L2-01 is set to 2, when the main power supply is restored while the control power supply (i.e., power supply
to
the control panel) is backed up, the Inverter will restart. Consequently, alarm UV1 (main circuit undervolt-
age)
will not be detected.
n
Related
Parameters
* 1. Factory
settings depend on Inverter capacity. (The values shown are for a 200 V Class Inverter for 0.4 kW.)
* 2. These
values are for a 200 V Class Inverter. For a 400 V Class Inverter, double the values.
n
Setting
Precautions
•
Error
output signals are not output during momentary power loss recovery.
•
To
continue Inverter 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.
Param-
eter
Num-
ber
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control
Methods
V/f
V/f
with
PG
Open
Loop
Vec-
tor
LCD
Display
L2-01
Momentary
power loss
detection
0:
Disabled (main circuit undervoltage (UV)
detection)
1:
Enabled (Restarted when the power returns
within
the time for L2-02. When L2-02 is
exceeded,
main circuit undervoltage detec-
tion.)
2:
Enabled while CPU is operating. (Restarts
when
power returns during control operations.
Does
not detect main circuit undervoltage.)
0
to 2
0
No
A
A
A
PwrL
Selection
L2-02
Momentary
power loss
ridethru
time
Ridethrough
time, when momentary power loss
selection
(L2-01) is set to 1, in units of seconds.
0
to 2.0
0.1
s
*1
No
A
A
A
PwrL
Ridethru t
L2-03
Min.
baseblock (BB) time
Set
the Inverter’s minimum baseblock time in
units
of one second, when the Inverter is restarted
after
power loss ridethrough.
Sets
the time to approximately 0.7 times the motor
secondary
circuit time constant.
When
an overcurrent or overvoltage occurs when
starting
a speed search or DC injection braking,
increase
the set values.
0.1
to 5.0
0.1
s
*1
No
A
A
A
PwrL
Baseblock t
L2-04
Voltage
recovery time
Set
the time required to return the Inverter output
voltage
to normal voltage at the completion of a
speed
search, in units of one second.
Set
the time required to recover from 0 V to the
maximum
voltage.
0.0
to
5.0
0.3
s
*1
No
A
A
A
PwrL
V/F Ramp t
L2-05
Undervoltage
(UV) detec-
tion
level
Sets
the main circuit undervoltage (UV) detection
level
(main circuit DC voltage) in V units.
Usually
setting is not necessary.
Insert
an AC reactor in the Inverter input side to
lower
the main circuit undervoltage detection
level.
150
to
210
*2
190
V
*2
No
A
A
A
PUV
Det Level
Summary of Contents for SYSDRIVE 3G3RV
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