Chapter 4
Operation
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4.7.3 Adjusting the Reference Offset
(1)Automatic
(1)Automatic
(1)Automatic
(1)Automatic Adjustment
Adjustment
Adjustment
Adjustment of
of
of
of the
the
the
the Torque
Torque
Torque
Torque Reference
Reference
Reference
Reference Offset
Offset
Offset
Offset
When using torque control, the servomotor may rotate slowly even when 0V is specified as the analog
reference voltage. This occurs when the host controller or external circuit has a slight offset (measured
in mv) in the reference voltage. In this case, the reference offset can be adjusted automatically and
manually using the panel operator.
The automatic adjustment of analog(speed,torque) reference offset(Fn003) automatically measures the
offset and adjusts the reference voltage.
The servodrive performs the following automatic adjustment when the host controller or external circuit
has an 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 manual adjustment of torque reference offset(Fn004).
The automatic adjustment of analog reference offset(Fn003) cannot be used when a position loop has
been formed with the host controller and the error pulse is changed to zero at the servomotor stop due
to servolock.
Use the torque reference offset manual adjustment(Fn004).
Note
Note
Note
Note
：
The analog reference offset must be automatically adjusted with the servo OFF.
(2)Manual
(2)Manual
(2)Manual
(2)Manual Adjustment
Adjustment
Adjustment
Adjustment of
of
of
of the
the
the
the Torque
Torque
Torque
Torque Reference
Reference
Reference
Reference Offset
Offset
Offset
Offset
Manual adjustment of the torque reference offset(Fn004) is used in the following cases.
·If a position loop is formed with the host controller and the error is zeroed when servolock is stopped.
·To deliberately set the offset to some value.
·Use this mode to check the offset data that was set in the automatic adjustment mode of the torque
reference offset.
This mode operates in the same way as the automatic adjustment mode(Fn003), except that the
amount of offset is directly input during the adjustment.
The offset adjustment range and setting unit are as follows.
Reference voltage
Offset
Torque reference
Reference voltage
Torque reference
Offset automatically adjusted in
the servodrive .
Automatic offset
adjustment
Torque reference
Torque reference
Torque reference
Torque reference
Offset adjustment range
Offset adjustment range
Offset adjustment range
Offset adjustment range
Analog voltage input
Analog voltage input
Analog voltage input
Analog voltage input
Offset adjustment range
Offset adjustment range
Offset adjustment range
Offset adjustment range::::
----1 0 2 4
1 0 2 4
1 0 2 4
1 0 2 4~
~
~
~+
+
+
+1 0 2 4
1 0 2 4
1 0 2 4
1 0 2 4
Offset setting unit
Offset setting unit
Offset setting unit
Offset setting unit
