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Sigma II User's Manual
limit depends on the load condition.
Parameter
Speed Reference Input Adjust-
Pn300
ment Factor (SRF)
(0.01V × SRF =Rated Speed)
This parameter sets the voltage range for speed reference input V-REF (CN1–5)
according to the output range of the host controller or external circuit.
When the default setting (600) is multiplied by 0.01V, the result (6V) corresponds to
the rated motor speed.
5.2.8
Torque Feed-Forward Function
The torque feed-forward function is used only in speed control (analog reference).
This function is used to:
•
Shorten positioning time.
•
Differentiate a speed reference at the host controller to generate a torque feed-
forward reference.
•
Input this reference together with the speed reference to the servo amplifier.
Too high a torque feed-forward value will result in overshooting or undershooting.
To prevent this, set the optimum value while closely observing the system response.
Connect a speed reference signal to V-REF (CN1-5 and 6) and a torque feed-forward
Motor speed
Signal
Setting Range: 150 to 3000
Default Setting: 600
Reference
speed
(rpm)
5-44
Chapter 5: Parameter Settings and Functions
Speed limit range
V-REF
Setting
(no units)
This slope is set.
Reference voltage (V)
Control Mode
Speed/Torque Control
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