O: Digital Operator Constants - YASKAWA Varispeed G7 Series Instruction Manual

Feed Forward: N5
User constants for the feed forward control are shown in the following table.
Con-
stant
Number
Feed forward
control
selection
N5-01
Feedfoward
Sel
Motor accel-
eration time
N5-02
Motor Accel
Time
Feed forward
proportional
gain
N5-03
Feedfoward
Gain
* 1. When the control method is changed, the factory setting will change. The flux vector factory setting is given.
* 2. The factory setting depends on the Inverter capacity. The value for a 200 V Class Inverter of 0.4 kW is given.


o: Digital Operator Constants

The following settings are made with the Digital Operator constants (o constants): Multi-function selections
and the copy function.
Monitor Select: o1
User constants for Digital Operator Displays are shown in the following table.
Con-
stant
Number
Monitor
selection
o1-01
User Moni-
tor Sel
-74
5
Name
Description
Display
Select the feed forward con-
trol.
0: Disabled
1: Enabled
Set the time required to
accelerate the motor at the
rated torque (T ) to the
100
rated speed (Nr).
2
J: GD /4, P: Motor rated out-
put
2π  J [kgm 2 ]  Nr [min -1 ]
ta =
60  T 100 [N  m]
However,
60 P [kW]
× 10 3 [N  m]
T 100 =

Nr [min -1 ]
2 π
Set the proportional gain for
feed forward control.
Speed reference response will
increase as the setting of N5-
03 is increased.
Name
Description
Display
Select the number of the
monitor item to display
fourth in drive mode (the
numeric value in the 
portion of U1-).
The output monitor voltage
(factory setting) can be
changed.
If o1-02 is set to 4 when
using the Digital Operator
(LCD), the monitor item set
in o1-01 when the power sup-
ply is turned ON is displayed.
Change
Setting Factory during
Range Setting Opera-
tion
0
0 or 1 No
*1
0.001
0.178 s
to No
*2
10.000
[s]
0.00 to
1.0 No
100.00
Change
Fac-
Setting during
tory
Range Opera-
Setting
tion
4 to 45
6 Yes
4 to 99
Control Methods
MEMO-
Open Open
V/f Loop Flux Loop
Regis-
V/f with Vec- Vec- Vec-
PG tor tor tor
1 2
No No No A A 5B0H
No No No A A 5B1H
No No No A A 5B2H
Control Methods
MEMO-
Open Open
V/f Loop
Flux Loop
Regis-
V/f with Vec- Vec- Vec-
PG tor tor tor
1 2
A A A A A 500H
BUS
Page
ter
4-33
6-144
4-33
6-144
4-33
6-144
BUS
Page
ter
–