6
-64
Note Attach a Backup Capacitor Unit for Momentary Power Loss if compensation for power interruptions of up to 2.0 seconds is required for 200 V/400 V
Class Inverters with outputs of 0.4 to 7.5 kW.
* 1. The factory setting depends on the Inverter capacity. The value for a 200 V Class Inverter of 0.4 kW is given.
* 2. These values are for a 200 V Class Inverter. For a 400 V Class Inverter, double the values.
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.
•
If the momentary power loss operation selection is set to 0 (Disabled), when the momentary power loss
exceeds 15 ms during operation, alarm UV1 (main circuit undervoltage) will be detected.
Speed Search
The speed search function finds the actual speed of the motor that is rotating using inertia, and then starts
smoothly from that speed. When restoring power after a temporary power loss, the speed search function
switches connection from the commercial power supply, and then restarts the fan that is rotating using inertia.
L2-04
Voltage recov-
ery time
Sets the time required to return
the Inverter output voltage to nor-
mal voltage at the completion of a
speed search, in units of one sec-
ond.
Sets the time required to recover
from 0 V to the maximum volt-
age.
0.0 to
5.0
0.3 s
*1
No
A
A
A
A
A
488H
PwrL V/F
Ramp t
L2-05
Undervoltage
detection 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 detec-
tion level.
150 to
210
*2
190 V
*2
No
A
A
A
A
A
489H
PUV Det Level
IMPORTANT
Speed search will be performed in the following cases.
• When Momentary power loss detection (L2-01) is set to 1 or 2 (Enabled) and power is restored after
a momentary power loss.
• When Number of auto restart attempts (L5-01) is set from 1 to 10 and the auto restart is performed
after a fault.
• Multi-function contact inputs (H1-
) are set to External search command (61, 62, or 64) and the
command is sent.
• Multi-function contact inputs (H1-
) are set to External baseblock (8 or 9) and the release com-
mand is sent.
The selected speed search type in b3-01, speed calculation or current detection, will be performed.
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vec-
tor
Open
Loop
Vector
2
