Compatible Adjustment Functions - YASKAWA SGD7S Product Manual

8.13.2

Compatible Adjustment Functions

The compatible adjustment functions are used together with manual tuning. You can use these
functions to improve adjustment results. These functions allow you to use the same functions
as for Σ-III-Series SERVOPACKs to adjust Σ-7-Series SERVOPACKs.
Feedforward
The feedforward function applies feedforward compensation to position control to shorten the
positioning time.
Position reference pulses
Feedforward
Pn109 Setting Range
Feedforward Filter Time Constant
Pn10A Setting Range
Note: If you set the feedforward value too high, the machine may vibrate. As a guideline, use a setting of 80% or
less.
Mode Switching (Changing between Proportional and PI
Control)
You can use mode switching to automatically change between proportional control and PI con-
trol.
Overshooting caused by acceleration and deceleration can be suppressed and the settling time
can be reduced by setting the switching condition and switching levels.
Motor
speed
Pn109
Differential Feedforward
+
Position loop gain (Kp)

Feedback pulses
Setting Unit
0 to 100 1%
Setting Unit
0 to 6,400 0.01 ms
Without Mode Switching
Overshooting
Actual Servomotor
operation
Reference
Overshooting
Settling time

8.13.2 Compatible Adjustment Functions

Pn10A
Feedforward Filter
Time Constant
+
Default Setting
0
Default Setting
0
Motor
speed
Time
8.13 Manual Tuning
+
Position
When Enabled Classification
Immediately Tuning
Position
When Enabled Classification
Immediately Tuning
With Mode Switching
Time
Settling time
8
8-91