5 Operation
5.5.4 Speed Limit in Torque Control
5-52
Internal Speed Limit Function
If the internal speed limit function is selected in Pn002.1, set the limit of the maximum speed of the servomo-
tor in Pn407. The limit of the speed in Pn408.1 can be either the maximum speed of the servomotor or the
overspeed alarm detection speed. Select the overspeed alarm detection speed to limit the speed to the maxi-
mum speed of the servomotor or the equivalent.
Note: The servomotor’s maximum speed or the overspeed alarm detection speed will be used when the setting in this
parameter exceeds the maximum speed of the servomotor used.
External Speed Limit Function
If the external speed limit function is selected in Pn002.1, set the V-REF input signal and Pn300.
Inputs an analog voltage reference as the servomotor speed limit value during torque control.
Notes:
• The smaller value of the speed limit input from the V-REF and the value of Pn407 is enabled when Pn002.1
is set to 1.
• The setting in Pn300 determines the voltage level to be input as the limit value. Polarity has no effect.
• When Pn300 is set to 6.00 (factory setting) and 6 V is input to V-REF (CN1-5, 6), the speed is limited to the
rated speed of the servomotor used.
Pn407
Speed Limit During Torque Control
Classification
Setting Range Setting Unit Factory Setting When Enabled
0 to 10000
1 min
-1
10000 Immediately Setup
Parameter Meaning
When
Enabled
Classification
Pn408
n.
0
[Factory setting]
Uses the smaller value of the maximum motor speed
and the value of Pn407 as the speed limit value.
After restart Setup
n.
1
Uses the smaller value of the overspeed alarm detec-
tion speed and the value of Pn407 as speed limit value.
Type
Signal
Name
Connector
Pin Number
Name
Input
V-REF CN1-5 External speed limit input
SG CN1-6 Signal ground for external speed limit input
Pn300
Speed Reference Input Gain
Classification
Setting Range Setting Unit Factory Setting When Enabled
150 to 3000 0.01 V/rated speed 600 Immediately Setup
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