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SD710 Series Servo Drive Technical Manual Chapter 6 Adjustment
20
6.5.4 Torque feedforward
Position control mode, using internal torque feedforward, can improve the torque command response and reduce the
position deviation at fixed acceleration and deceleration; speed control mode, using torque feedforward, can improve
the torque command response and reduce the speed deviation at fixed speed.
Related function codes.
Fn No.
Parameter
Range
Default
Unit
Pn123
Torque feedforward gain
0 to 100
0
%
Pn124
Torque feed-forward filtering time
0 to 64.00
0.00
ms
Precautions
●
When the torque feedforward gain Pn123 is set to 0%, the torque feedforward function is
disabled.
6.5.4 PI/P switching
PI-P control can be switched when the control mode is speed control or position control, and in mixed control mode, it is
only effective when switching to speed mode and position mode.PI-P switching can be switched with the manual PI-P
control signal (/P-CON) via the switching signal, and becomes P control when the /P-CON signal is set to ON. The
conditions for automatic switching can also be selected with the parametric speed loop PI-P switching condition selection
switch Pn10B.
(1) Manual PI-P control
a) Configuration of manual PI-P control
Related input signals
Value
Symbolic
Function
Instructions
Trigger
Mode
0x05
P-CON
Speed loop PI<->P
switch over
This signal is used to switch the PI
(proportional/integral) regulator of the
drive speed loop with the P (proportional)
regulator.
Invalid: becomes a PI controller
(proportional/integral).
Valid: becomes P controller
(proportional).
Level
trigger
□
P
□
S
□
T
!