Reference Offset Adjustment - YASKAWA JUSP-MD D01A Series User Manual

5 Operation

5.5.2 Reference Offset Adjustment

(2) Parameter Setting
Using Pn400, set the analog voltage level for the torque reference (T-REF) that is necessary to operate the ser-
vomotor at the rated torque.
Pn400
Factory Setting
Note: A torque reference above the rated torque can be applied but it may cause an overload (high load) alarm (A.710) or
overload (low load) alarm (A.720) if excessive torque is output for a long time. Refer to 9.1.2 Troubleshooting of
Alarms.
5.5.2

Reference Offset Adjustment

In
torque
because the internal reference in the multi-winding drive unit has a slight offset of a few millivolts. 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).
Output torque
5-44
Torque Reference Input Gain
Setting Range Setting Unit
10 to 100 0.1 V/rated torque
Output torque (%)
300
200
100
-12 -10 -3 0
1 3
-100
-200
-300
Input voltage range (0 to ±12 V)
control, the servomotor may rotate at a very low speed with a voltage reference of 0 V. This occurs
Offset
Torque
reference
Offset adjustment
voltage
Factory Setting
30
(Rated torque at 3.0 V)
(Rated torque)
Torque reference voltage (V)
10 12
Setting range
(1.0 to 10.0 V)
Output torque
Torque
reference
voltage
Torque
Speed Position
When Enabled
Immediately
The offset is adjusted in the multi-winding
drive unit.
Offset Adjustment Range: -127 to +127
(Torque Reference: -1905 mV to 1905 mV
Offset Setting Unit: 15.0 mV)
Classification
Setup