YASKAWA SERVOPACK Sigma 7S Series Supplementary Manual page 13

1.1 Speed Control
1.1.1 Basic Settings for Speed Control
Setting the Speed Reference Input Gain (Pn300)
The reference voltage for the rated motor speed is set for the speed reference input gain
(Pn300) to define the relationship between the position reference voltage and the motor speed.
Pn300
- 0
Adjusting the Speed Reference Offset
With speed control, the Servomotor may sometimes rotate at a very low speed for a speed ref-
erence of 0 V (with a reference speed of 0 or when the speed reference is stopped). This
occurs because the internal reference in the SERVOPACK has a slight offset.
If the Servomotor moves at a very low speed, the offset needs to be eliminated by adjusting the
offset.
You can adjust the speed reference offset either automatically or manually.
Motor peed
 Automatically Adjusting the Speed Reference Offset
To automatically adjust the speed reference offset, the amount of offset is measured and the
speed reference voltage is adjusted automatically.
The measured offset is saved in the SERVOPACK.
Information
1-4
Speed Reference Input Gain
Setting Range Setting Unit
150 to 3,000
Motor peed (min
Rated motor peed
Minimum input voltage (−12 V)
-12 -6
Input range (0 to ±12 V)
Off et
peed
reference
Off et
voltage
adju tment
The offset does not use a parameter, so it will not change even if the parameter settings are
initialized.
Default Setting
600 (rated speed
0.01 V
for 6.00 V)
−1 or mm/ )
Default etting
1.5 6 12
etting range (1.50 to 0.00 V)
Motor peed
peed
reference
voltage
Speed Position
When Enabled Classification
Immediately
Maximum input voltage (+12 V)
peed reference
0
voltage (V)
The off et i adju ted in the
ERVOPACK.
Off et adju tment range:
±15,000 ( peed reference: ±879 mV)
Off et etting unit: 8
( peed reference: 0.47 mV)
Torque
Setup