YASKAWA Varispeed E7 Instruction Manual And Parameter Description page 120

Power Loss Ridethrough: L2
Con-
Name
stant
Number
0: Disabled (DC bus undervoltage
1: Enabled (Restarted when the
Momentary power
L2-01
loss detection
2: Enabled while CPU is operating.
Ridethrough time, when Momen-
Momentary power
L2-02 tary Power Loss Selection (L2-01)
loss ridethru time
is set to 1, in units of seconds.
Sets the Inverter's minimum base-
block time, when the Inverter is
restarted after power loss ride-
through.
Min. baseblock Set the time to approximately 0.7
L2-03
time times the motor time constant.
When an overcurrent or overvol-
tage occurs when starting a speed
search or DC injection braking,
increase the set values.
Sets the time required to return the
Voltage recovery Inverter output voltage from 0V to
L2-04
time normal voltage at the completion of
a speed search.
Sets the main circuit undervoltage
(UV) detection level (main circuit
Undervoltage
L2-05 DC voltage).
detection level
Usually changing this setting is not
necessary.
* 1. The factory setting depends upon the Inverter capacity. The value for a 200 V Class Inverter of 0.4 kW is given.
* 2. These are values for a 200 V class Inverter. Value for a 400 V class Inverter is double.
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Description
(UV1) detection)
power returns within the time set
in L2-02. When L2-02 is
exceeded, DC bus undervoltage
is detected.)
(Restarts when power returns
during control operations. Does
not detect DC bus
undervoltage.)
Change
Access
during
Setting Factory
Range Setting Level
Opera-
tion
0 to 2 0 No A
0.1 s
0 to 2.0 No A
*1
0.1 to
0.1 s
No A
5.0
*1
0.0 to
0.3 s
No A
5.0
*1
150 to
190 V
No A
210
*2
*2
User Constant Tables
MEMO-
BUS Page
Register
485H 6-38
486H 6-38
6-38
487H
6-39
6-38
488H
6-39
489H 6-38
33
5-