YASKAWA Varispeed G7 Series Instruction Manual page 205

Name
Con-
Description
stant
Display
Number
Feeder resis-
Set the gain for the feeder
tance adjust-
N4-18 resistance in the speed esti-
ment gain
mator.
Feeder R gain
Speed estima-
Set the switching frequency
tor switching
of high-speed/low-speed
frequency 2
N4-28
operation for the speed esti-
Speed
mator during deceleration.
Change F 2
Torque Gradually increase this set-
adjustment ting to improve low-speed
gain 2 power. If the setting is too
N4-29 high, the power may be
reduced.
TRQ adjust
Usually, there is no need to
gain 2
change this setting.
Low-speed Increase this setting to ensure
regeneration stable operation for extremely
stability coef- low-speed regeneration. If the
ficient 2 setting is set to a high value,
N4-30 the speed will increase with
the size of the regenerative
LowSpd Rgn
load.
Coef 2
Adjust this setting in intervals
of approximately 0.2.
Speed estima-
Set the lower limit for the
tor gain fluc-
fluctuation frequency of the
tuation
N4-32 speed estimator's low-speed
frequency 1
proportional gain (PI control).
SpdEst Gain
Set the value in Hz.
Frq1
Speed estima-
Set the upper limit for the
tor gain fluc-
fluctuation frequency of the
tuation
N4-33 speed estimator's low-speed
frequency 2
proportional gain (PI control).
SpdEst Gain
Set the value in Hz.
Frq2
Speed estima-
Set ratio for fluctuating the
tor gain fluc-
speed estimator's low-speed
tuation rate
N4-34
proportional gain (PI control).
SpdEst Gain
Set the value as a percentage.
Rate
Control Methods
Change
Setting Factory during
Range Setting Opera-
V/f
tion
0.90 to
1.00 No No
1.30
20 to
50 Hz No No
70
0.00 to
0.10 No No
0.40
0.00 to
1.00 No No
10.00
0.0 to
5.0 Hz No No
60.0
0.0 to
20.0 Hz No No
60.0
0.0 to
200.0% No No
200.0
User Constant Tables
MEMO-
Open Open
BUS
V/f Loop Flux Loop
Regis-
with Vec- Vec- Vec-
ter
PG tor tor tor
1 2
No No No A 5A5H
No No No A 5AFH
No No No A 5B4H
No No No A 5B5H
No No No A 5B7H
No No No A 5B8H
No No No A 5B9H
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