5 Operation5.3.2 Reference Offset Adjustment5-20(2) Parameter SettingUsing Pn300, set the analog voltage level for the speed reference (V-REF) necessary to operate the servomotorat the rated speed.5.3.2 Reference Offset AdjustmentIn speed control, the servomotor may rotate at a very low speed with a voltage reference of 0 V. This occursbecause the internal reference in the multi-winding drive unit has a slight offset. It is called "offset".If the servomotor rotates at a very low speed, the offset needs to be eliminated using the offset adjustmentfunction.Use either automatic adjustment or manual adjustment. Automatic adjustment uses the automatic adjustmentparameter for reference offset (Fn009). Manual adjustment uses the manual adjustment parameter for refer-ence offset (Fn00A).Pn300Speed Reference Input Gain ClassificationSetting Range Setting Unit Factory Setting When Enabled150 to 3000 0.01 V/rated speed 600(Rated speed at 6.00 V) Immediately SetupSpeed Position TorqueMotor speed (min−1 )Minimum input voltage (−12 V)Maximum input voltage (+12 V)Speed reference voltage (V)Setting range (1.50 to 30.00 V)Input range (0 to ± 12 V)-661.5 12 30-12-30Factory settingRated speedOffsetThe offset is adjustedin the multi-winding drive unit.OffsetadjustmentSpeedreferencevoltageSpeedreferencevoltageOffset Adjustment Range:±15000 (Speed reference: ±879 mV)Offset Setting Unit: 8(Speed reference: 0.47 mV)Motorspeed Motorspeed
