3.6 Setup Procedure
3.6.7 Gain Adjustment
3-18
3.6.7
Gain Adjustment
Gain Adjustment for Pressure Feedback Control 2
Use the S to perform autotuning without a host reference and to estimate the
moment of inertia. Adjust Pn4A7 (Pressure Feedback Control 2 Stability Gain), Pn4A8 (Pressure
Feedback Control 2 Stability Integral Time), and Pn4AC (Pressure Feedback Moment of Inertia
Ratio) as required and then set Pn4A0 (Pressure Feedback Control One-Parameter Gain Level)
to a suitable value.
You can set Pn45E (Pressure Feedback Reference Filter Time Constant) according to the sys-
tem to suppress shock when updating the pressure feedback reference for torque (pressure)
control. If a large value is set, it will increase the delay and make response slower. Pn45E is
valid only when pressure feedback control is enabled (Pn440 = n.
1).
Pn4A0
Pressure Feedback One-Parameter Gain Level
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
1 to 65,535
–
1,000
Immediately
Setup
Pn4A7
Pressure Feedback Control 2 Stability Gain
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
10 to 20,000
0.1 Hz
400
Immediately
Setup
Pn4A8
Pressure Feedback Control 2 Stability Integral Time
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
15 to 51,200
0.01 ms
2,000
Immediately
Setup
Pn4AC
Pressure Feedback Moment of Inertia Ratio
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
0 to 20,000
1%
100
Immediately
Setup
Pn45E
Pressure Feedback Reference Filter Time Constant
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
0 to 65,535
0.01 ms
0
Immediately
Setup
Torque
Torque
Torque
Torque
Before filter
After filter
3
6.8%
100%
6
3
.2%
Pn45E
Pn45E
After reference filter
Before reference filter
Torque
Summary of Contents for SERVOPACK Sigma 7 Series
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