9-25
9 Servo Parameter Objects
G5 Series AC Servo Drives With Built-in EtherCAT Communications, Linear Motor Type
9-4 Analog Control Objects
9
• Select the type of the external encoder to be used.
• For the set value, refer to the external encoder specifications.
Explanation of Settings
*1 The supported speed is the internal feedback pulse speed [external encoder pulses/s] of the external encoder
that can be processed by the Servo Drive.
Check the instruction manual of the external encoder for the speed range supported by your external encoder.
For example, the maximum speed of a serial communications external encoder with a resolution of 0.01 µm is
4 m/s.
When a serial communications type encoder is used for speed of 5 m/s, choose a serial external encoder with
a resolution of 0.0125 µm or lower.
*2 These are the directions that the Drive counts a 90ï‚° phase difference output.
Precautions for Correct UsePrecautions for Correct Use
• If you set this object to 1 or 2 when an external encoder with a 90° phase difference output is
connected, an External Encoder Connection Error (Error No. 50.0) will occur.
• If you set this object to 0 when a serial communications external encoder is connected, a
Phase-A Connection Error (Error No. 55.0), Phase-B Connection Error (Error No. 55.1), or
Phase-Z Connection Error (Error No. 55.2) will occur.
3323 hex
External Feedback Pulse Type Selection
Setting range 0 to 2 Unit ï€
Default setting
0
Data attribute
R
Size 2 bytes (INT16) Access RW PDO map Not possible.
Set value Description
Supported speed
*1
0
90ï‚° phase difference output type
*2
0 to 4 Mpps (Multiplication ï‚´ 4)
1 Serial communications type
(Incremental type)
0 to 400 Mpps
2 Serial communications type
(Absolute type)
0 to 400 Mpps
hm
0.01 [µm/pulse] × 400 [Mpulse/s] = 4 [m/s]
Count-down direction
Count-up direction
EXB is 90° ahead of EXA.
t1 > 0.25 µs
t2 > 1.0 µs
EXB is 90° behind EXA.
t1 > 0.25 µs
t2 > 1.0 µs
t1
t2
t1
t2
EXA
EXB
EXA
EXB
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