YASKAWA Varispeed G7 Series User Manual

Continuing Operation
6- 65
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
NoAAAAA488H
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
NoAAAAA489H
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
TOE-S616-60.1.book 65 ページ ２０１７年８月４日 金曜日 午後３時４１分

YASKAWA Varispeed G7 Series Specifications

General

Brand	YASKAWA
Model	Varispeed G7 Series
Category	Inverter
Language	English