YASKAWA Sigma-7 SGD7S Series

Encoder Output Resolution
Setting
Range
Setting Unit Default Set-
ting
When Ena-
bled
Classifica-
tion
Pn281 1 to 4,096 1 edge/pitch 20 After restart Setup
(applies to Position Control)
The maximum setting for the encoder output resolution is 4,096. If the
resolution of the external encoder exceeds 4,096, pulse output will no
longer be possible at the resolution given in Ä ‘Calculating the Settings
for the Electronic Gear Ratio’ page 180.
11.4.6 External Absolute Encoder Data Reception Sequence
Refer to the following section for details.
Ä Chap. 7.10.5 ‘Reading the Position Data from the Absolute Linear Encoder’ page 241
With fully-closed loop control, the same sequence as for a Linear Servomotor is used.
11.4.7 Setting Unit Systems
Refer to the following section for details.
Ä Chap. 6.15 ‘Setting Unit Systems’ page 178
With fully-closed loop control, the same setting as for a Linear Servomotor is used.
11.4.8 Alarm Detection Settings
This section describes the alarm detection settings (Pn51B and Pn52A).
This setting is used to detect the difference between the feedback position of the Servo-
motor encoder and the feedback load position of the external encoder for fully-closed
loop control. If the detected difference exceeds the setting, an A.d10 alarm (Motor-Load
Position Error Overflow) will be output.
Motor-Load Position Deviation Overflow Detection Level
Setting
Range
Setting Unit Default Set-
ting
When Ena-
bled
Classifica-
tion
Pn51B 0 to
1,073,741,82
3
1 reference
unit
1000 Immediately Setup
(applies to Position Control)
If you set this parameter to 0, A.d10 alarms will not be output and the
machine may be damaged.
Related Parameters
Pn51B (Motor-Load Posi-
tion Deviation Overflow
Detection Level)
Sigma-7 Series SERVOPACKs
Fully-Closed Loop Control
Parameter and Object Settings for Fully-closed Loop Control > Alarm Detection Settings
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