Electronic Gear Setting; Alarm Detection Settings - YASKAWA SGD7S Product Manual

10.3 Parameter Settings for Fully-Closed Loop Control

10.3.5 Electronic Gear Setting

Example
Related Parameters
Pn281
Note: 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 resolu-
tion given in

10.3.5 Electronic Gear Setting

Refer to the following section for details.
5.14 Electronic Gear Settings on page 5-41
With fully-closed loop control, the same setting as for a Linear Servomotor is used.

10.3.6 Alarm Detection Settings

This section describes the alarm detection settings (Pn51B and Pn52A).
Pn51B (Excessive Error Level between Servomotor and
Load Positions)
This setting is used to detect the difference between the feedback position of the 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 Over-
flow) will be output.
Pn51B
Note: An A.d10 alarm will not be output if this parameter is set to 0.
Pn52A (Multiplier per One Fully-closed Rotation)
Set the coefficient of the deviation between the motor and the external encoder per motor rota-
tion.
This setting can be used to prevent the motor from running out of control due to damage to the
external encoder or to detect belt slippage.
10-8
If the setting is 20 and the speed is 1,600 mm/s, the output frequency would be 1.6 Mpps
1600 mm/s
= 1,600,000 = 1.6 Mpps
0.001 mm
Because 1.6 Mpps is less than 6.4 Mpps, this setting can be used.
Encoder Output Resolution
Setting Range Setting Unit
1 to 4,096 1 edge/pitch

Feedback Resolution of Linear Encoder on page 5-43.
Excessive Error Level between Servomotor and Load Positions
Setting Range Setting Unit
0 to
1 reference unit
1,073,741,824
Default Setting When Enabled
20 After restart
Default Setting When Enabled
1000 Immediately
Classification
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Classifica-
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