6-62
* 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.
îš„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.
îš‹ 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.
îš„Related Constants
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 detection level.
150 to
210
*2
190 V
*2
NoAAAAA
PUV Det
Level
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vec-
tor
Open
Loop
Vector
2
b3-01
Speed search
selection (cur-
rent detection
or speed cal-
culation)
Enables/disables the speed search
function for the Run Command and
sets the speed search method.
0:Disabled, speed calculation
1: Enabled, speed calculation
2: Disabled, current detection
3: Enabled, current detection
Speed Calculation:
When the search is started, the
motor speed is calculated and
acceleration/deceleration is
performed from the calculated
speed to the specified frequency
(motor direction is also searched).
Current Detection:
The speed search is started from
the frequency when power was
momentarily lost and the
maximum frequency, and the
speed is detected at the search
current level.
0 to 3
2
*1
No A A A No A
SpdSrch at
Start
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vec-
tor
Open
Loop
Vector
2
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