Fagor BCSD-08AMA-01, User Manual

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BCSD-88/116 Digital Brushless AC S ervo D rive system - Ref. 1809
5.2.4. Automatic Adjustment of the Speed Reference Offset
When using the speed (analog reference) control, the servomotor may rotate slowly even if 0 V is specified
as the analog voltage reference.
This happens if the host controller or external circuit has a slight offset (in the unit of mV) in the reference
voltage.
The reference offset automatic adjustment mode automatically measures the offset and adjusts the
reference voltage. It can adjust speed reference offset.
The servodrive automatically adjusts the offset when the host controller or external circuit has the offset
in the reference voltage.
After completion of the automatic adjustment, the amount of offset is stored in the servodrive. The amount
of offset can be checked in the speed reference offset manual adjustment mode (Fn004). Refer to
5.2.5
Manual Adjustment of the Speed Reference Offset.
The automatic adjustment of reference offset (Fn003) cannot be used when a position loop has been
formed with a host controller and the error pulse is changed to zero at the servomotor stop due to servolock.
Use the speed reference offset manual adjustment for a position loop.
Note: The speed reference offset must be automatically adjusted with the servo OFF.
Adjust the speed reference offset automatically in the following procedure.
1. Turn OFF the servodrive and input the 0 V reference voltage from the host controller or external circuit.
2. Press the MODE key to select the utility function mode.
3. Press the INC or DEC key to select the utility function number Fn003.
4. Press the ENTER key to enter into the speed reference offset automatic adjustment mode.