4-98
H Operation
PLOCK
(position lock command)
Servomotor operation
Pn501 (Position lock rota-
tion speed)
Position lock status
REF
(speed command in-
put)
Pn501 (Position lock rota-
tion speed)
4-5-15 Speed Limit Function (Torque)
H Functions
• This function limits Servomotor rotation speed when torque control is used.
• Set a limit so that the Servomotor rotation speed does not exceed the maximum speed of the mechani-
cal system.
• Outside of the speed limit range, a torque in proportion to the difference from the speed limit value is
generated to slow down the Servomotor rotation speed. In such cases the number of Servomotor rota-
tions does not necessarily match the speed limit value. (The number of Servomotor rotations varies
depending on the load.)
• There are two methods that can be used for limiting the speed:
• Apply a constant fixed speed limit for torque control, by means of user parameters.
• Limit the speed by means of analog voltage. Use REF (speed command input) as an analog
speed limit input.
• When the speed limit is in operation, VLIMT (speed control output) is output (when the signal has been
allocated in Pn50F.1).
• The Servomotor rotation speed is limited by the smallest limit among the speed limits and analog
speed limits set in the parameters.
D Parameters Requiring Settings
Parameter No. Parameter
name
Explanation Reference
Pn407 Speed limit Set the speed limit for torque control. Setting
range: 0 to 10,000 (r/min).
4-4-4 Parameter
Details
Operation Chapter 4
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