Yaskawa Sigma II Series Servo System - Manual (Page 129)

Sigma II User’s Manual Chapter 5: Parameter Settings and Functions
5 - 43
The maximum speed of the servomotor will be used if Pn407 is set to a value higher
than the maximum speed of the servomotor.
External Speed Limit function:
This function 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.
The default setting is 6V = the rated motor speed.
Principle of Speed Limit
When the control speed range is exceeded, torque, inversely proportional to the
difference between the speed limit and the actual speed, is fed back in order to return
the system to a level within the control speed range. In effect, the actual motor speed
limit depends on the load condition.
Parameter Signal
Setting
(0.01V /Rated Speed)
Control Mode
Pn300 Speed Reference Input Gain
Setting Range: 150 to 3000
Default Setting: 600
Speed/Torque Control
Reference voltage (V)
Reference
speed
(rpm)
This slope is set.
Speed
limit
range
Motor speed
V-REF