6 Basic Control Functions
6-18
G5-series AC Servomotors and Servo Drives User’s Manual (with Built-in EtherCAT Communications)
This function sets the position command for the position control part to the value that is calculated by
multiplying the command from the Host Controller with the electronic gear ratio.
• For details on the electronic gear function, refer to Electronic Gear Function on page 7-21.
Set the external encoder output type and direction.
z Supported External Encoders
The corresponding external encoders for each output type are given in the following table.
*1 These are the feedback speeds from the external encoder at which Servo Drive can respond. Check the
external encoder operation manual for its maximum output frequency.
Electronic Gear Function (6091-01 Hex, 6091-02 Hex)
Index Name Description Setting range Unit
6091-01 hex Motor
revolutions
Set the numerator of the electronic gear
ratio for the command pulse input.
0 to
1,073,741,824
−
6091-02 hex Shaft
revolutions
Set the denominator of the electronic gear
ratio for the command pulse input.
1 to
1,073,741,824
−
External Feedback Pulse Type Selection (3323 Hex, 3326 Hex)
Index Name Description Setting range Unit
3323 hex External
Feedback
Pulse Type
Selection
Select the type of the external encoder to be
used.
0:Encoder with 90° phase difference output
1:Incremental encoder with serial
communications
2:Absolute encoder with serial
communications
0 to 2
−
3326 hex External
Feedback
Pulse Direction
Switching
If the count directions of the external
encoder feedback pulse and the encoder
total feedback pulses do not match, reverse
the external encoder feedback pulse
direction in this setting.
0: Not reversed, 1: Reversed
0 to 1
−
Set value of
3323 hex
External encoder
type
Corresponding external encoder
examples
Maximum input
frequency
*1
0 Encoder with 90°
phase difference
output
*2*3
External encoder with 90° phase difference
output
0 to 4 Mpps (After x4)
1 Incremental encoder
with serial
communications
*3
Sony Manufacturing Systems Corporation
SR75, SR85
0 to 400 Mpps
2 Absolute encoder with
serial
communications
*3
Mitutoyo Corporation
AT573, ST771A, ST773A
Sony Manufacturing Systems Corporation
SR77, SR87
0 to 400 Mpps
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