.USING THE DIGITAL OPERATOR4.2.4 Reference Offset Automatic Adjustment196• If the mode switch is used, take one of the steps below before running autotuning.(1) Cancel the mode switch.(2) Set the mode switch operating level to a high level.Refer to page 118 for details about setting the mode switch.• If using the S-ON signal to set the servo ON status, display before turningON the S-ON signal.4.2.4 Reference Offset Automatic Adjustment1) Why Does Reference Offset Occur?Using a speed/torque control (SGDA-jjjS) type, the motor may rotate slowly whenthe reference voltage is intended to be 0 V.This occurs when the host controller or external circuit has a small offset (measured inmV) in the reference voltage.Automatic Adjustment of Reference VoltageThe reference offset automatic adjustment mode automatically measures the offset andadjusts the reference voltage. It adjusts both speed and torque references.The following diagram illustrates automatic adjustment of an offset in the referencevoltage from the host controller or external circuit.ReferenceVoltageReferenceSpeed orReferenceTorqueOffsetAutomatic Adjustmentof OffsetReferenceVoltageOffsetAutomaticallyAdjusted inServopackReferenceSpeed orReferenceTorque2) After completion of offset automatic adjustment, the amount of offset is stored in theServopack.The amount of offset can be checked in the speed reference offset manual adjustmentmode. Refer to sub-section 4.2.5 for details.4SGDA- SSpeed/Torque
