YASKAWA Varispeed G7 Series User Manual

Improved Operating Efficiency
6- 41
• Elevating machine: Set the load for only the motoring operation (hoisting) side.
(Do not use this function for an elevating machine with a counterweight, because a shock will occur
when the load becomes a regenerative load.)
• Only motoring operation compensation can be set for both forward and reverse operation.
(Compensation cannot be set for regeneration operation.)
• Starting torque compensation is disabled when switching between forward and reverse after a speed
search.
• Starting torque compensation is always disabled when using motor 2.
• If shocks occur when starting the motor, increase the setting of C4-05 (Starting Torque Time Constant).
Or, use DC injection braking time at start (b2-03) and the DC injection braking command for a multi-func-
tion contact input (setting: 60) and increase the motor magnetic flux before starting the motor.
(The flux can be increased faster using DC injection braking time at start (b2-03).)
 Hunting-prevention Function
The hunting-prevention function suppresses hunting when the motor is operating with a light load. This func-
tion can be used in V/f and V/f with PG.
Related Constants
* 1. Applicable for G7-Series Inverters with software version PRG 1034 and later.
* 2. The factory setting depends upon the Inverter capacity. The value for a 200 V Class Inverter of 0.4 kW is given.
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
N1-01
Hunting-pre-
vention func-
tion selection
0: Hunting-prevention function
disabled
1: Hunting-prevention function
enabled
The hunting-prevention function
suppresses hunting when the
motor is operating with a light
load.
This function is enabled in V/f
control method only.
If high response is to be given pri-
ority over vibration suppression,
disable the hunting-prevention
function.
0 or 1 1 No A A No No No 580H
Hunt Prev
Select
N1-02
Hunting-pre-
vention gain
Set the hunting-prevention gain
multiplication factor.
Normally, there is no need to
make this setting.
Make the adjustments as follows:
• If vibration occurs with light
load, increase the setting.
• If the motor stalls, reduce the
setting.
If the setting is too large, the volt-
age will be too suppressed and the
motor may stall.
0.00 to
2.50
1.00 No A A No No No 581H
Hunt Prev Gain
N1-03
*1
Hunting-pre-
vention time
constant
Set the hunting-prevention pri-
mary delay time in units of ms.
0 to
500
10
ms
*2
No A A No No No 582H
Hunt Prev Time
TOE-S616-60.1.book 41 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