Reference Offset Adjustment - YASKAWA SGMJV User Manual

5 Operation

5.5.2 Reference Offset Adjustment

(2) Parameter Setting
This sets the analog voltage level for the torque reference (T-REF) that is necessary to operate the servomotor
at the rated torque.
Pn400
<Checking the Internal Torque Reference>
Internal torque reference can be checked with the panel operator, an analog monitor or SigmaWin+.
Factory setting

5.5.2 Reference Offset Adjustment

In torque control, the servomotor may rotate at a very low speed with an analog voltage reference of 0 V. This
occurs because the reference voltage of the host controller or external circuit has a slight offset of a few milli-
volts. It is called "offset".
If the servomotor rotates at a very low speed, the offset needs to be eliminated with the offset adjustment func-
tion.
Use either automatic adjustment or manual adjustment. Automatic adjustment uses the automatic adjustment
parameter for reference offset (Fn009). Manual adjustment uses the manual adjustment parameter for refer-
ence offset (Fn00B).
(1) Automatic Adjustment of Reference Offset (Fn009)
The automatic adjustment of reference offset automatically measures the offset and adjusts the reference volt-
age.
Internal
torque
reference
5-48
Torque Reference Input Gain
Setting Range Setting Unit
10 to 100 0.1 V/rated torque
Reference torque (%)
300
200
100
- 12 - 8 - 4
The slope is set in Pn400.
Offset
Torque
reference
Automatic
offset
adjustment
Factory Setting
30
Input voltage (V)
0 3 4 8 12
- 100
- 200
- 300
Internal
torque
reference
Speed Position Torque
When Enabled
Immediately
Offset automatically
adjusted in SERVOPACK.
Torque
reference
Classification
Setup