Continuing Operation; Restarting Automatically After Power Is Restored - Omron SYSDRIVE RV Series User Manual

Continuing Operation

This section explains functions for continuing or automatically restarting Inverter operation even if an
error occurs.

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.
Related Parameters
Param-
eter
Number
Momentary
power loss
detection
L2-01
PwrL Selec-
tion
Momentary
power loss
ridethru
L2-02
time
PwrL Ride-
thru t
Min. base-
block time
L2-03
PwrL Base-
block t
-68
6
Name
Description
Display
0: Disabled [main circuit
undervoltage (UV1)
detection]
1: Enabled [Restarted when
the power returns within
the time for L2-02. When
L2-02 is exceeded, main
circuit undervoltage
(UV1) is detected.]
2: Enabled while CPU is
operating. [Restarts when
power returns during
control operations. Does
not detect main circuit
undervoltage. (UV1)]
Ridethrough time, when
Momentary Power Loss
Selection (L2-01) is set to 1,
in units of seconds.
Sets the Inverter's minimum
baseblock time in units of
one second, when the
Inverter is restarted after
power loss ridethrough.
Sets the time to approxi-
mately 0.7 times the motor
secondary circuit time con-
stant.
When an overcurrent or
overvoltage occurs when
starting a speed search or DC
injection braking, increase
the set values.
Control Methods
Change
Setting Factory during
Range Setting Opera-
V/f
tion
0 to 2 0 No A
0 to
0.1 s
No A
25.5
*1
0.1 to
0.2 s
No A
5.0
*1
Regis-
V/f Open Flux
ter
with Loop Vec-
PG Vector tor
A A A 485H
A A A 486H
A A A 487H