YASKAWA SGD7S series Product Manual page 427

8.13 Manual Tuning
8.13.2 Compatible Adjustment Functions
 Related Parameters
 Torque Feedforward
Torque feedforward is allocated to T-REF (Pn002 = n.X) and it is set using the torque ref-
erence input gain (Pn400) and T-REF filter time constant (Pn415).
The default setting of Pn400 is 30. Therefore, if the torque feedforward value is ±3 V, then the
torque is limited to ±100% of the rated torque.
Pn002
Pn400
Pn415
Pn426
Note: 1. Overshooting will occur if you set the torque feedforward too high. Set the optimum value while monitoring
2. You cannot use the torque feedforward function together with torque limiting with an analog voltage refer-
 Speed Feedforward
You set the speed feedforward function with the position control option (Pn207 = n.X)
and the speed reference input gain (Pn300).
The default setting of Pn300 is 600. Therefore, if the speed feedforward value is ±6 V, then it
will indicate the rated speed.
Pn207
Pn300
Pn307
Pn30C
Note: Overshooting will occur if you set the feedforward too high. Set the optimum value while monitoring the
response.
8-88
Parameter

n. 0
Do not use T-REF.
(default setting)

n. 1 Use T-REF as an external torque limit input.

n. 2 Use T-REF as a torque feedback input.
Use T-REF as an external torque limit input

n. 3
when /P-CL or /N-CL is active.
Torque Reference Input Gain
Setting Range
10 to 100 0.1 V/rated torque
T-REF Filter Time Constant
Setting Range
0 to 65,535
Torque feedforward average movement time
Setting Range
0 to 5,100
the response.
ence.
Parameter
 
n. 0
Do not use V-REF.
(default setting)
 
n. 1 Use V-REF as a speed feedback input.
Speed Reference Input Gain
Setting Range
0.01 V/Rated
150 to 3,000
Speed Reference Filter Time Constant
Setting Range
0 to 65,535
Speed Feedforward Average Movement Time
Setting Range
0 to 5,100
Meaning
Setting Unit Default Setting
30
Setting Unit Default Setting
0.01 ms
Setting Unit Default Setting
0.1 ms
Meaning
Setting Unit Default Setting
600
motor speed
Setting Unit Default Setting
0.01 ms 40
Setting Unit Default Setting
0.1 ms
When Enabled
After restart
Speed Position
When Enabled
Immediately
Speed Position
When Enabled
0 Immediately
When Enabled
0 Immediately
When Enabled
After restart
Speed Position
When Enabled
Immediately
When Enabled
Immediately
When Enabled
0 Immediately
Classification
Setup
Torque
Classification
Setup
Torque
Classification
Setup
Classification
Setup
Classification
Setup
Torque
Classification
Setup
Classification
Setup
Classification
Setup