Estun ProNet-30D - Limiting Servomotor Speed During Torque Control

ProNet Plus Series AC Servo User's Manual
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4.7.4 Limiting Servomotor Speed During Torque Control
During torque control, the servomotor is controlled to output the specified torque, which means that the servomotor speed
is not controlled. Accordingly, when an excessive reference torque is set for the mechanical load torque, it will prevail over
the mechanical load torque and the servomotor speed will greatly increase.
This function serves to limit the servomotor speed during torque control to protect the machine.
Without Speed Limit
With Speed Limit
Servomotor speed
Max.speed
t
Danger of damage due to
excessive of machine speed.
Servomotor speed
t
Safe operation with speed limit.
Speed limit
(1)Speed Limit Enable
Parameter
Description
Pn001
b.□□0□
Use the value set in Pn406 as the speed limit (Internal speed limit )
b.□□1□
Usethe lower speed between V-REF and Pn406 as an external speed limit
input.(External speed limit)
(2)Speed Limit During Torque Control
Pn406
Speed Limit During Torque Control
Setting Range
Setting Unit
Factory Setting
Setting Validation
0～6000
rpm
1500
Immediately
·Set the servomotor speed limit value during torque control.
·Pn005=H.□□1□, Pn406 is motor speed limit value.
·The servomotor’s maximum speed will be used when the setting in this parameter exceeds the maximum speed of the
servomotor used.
(3)External Speed Limit Function
Type
Signal Name
Connector Pin Number
Name
Input
V-REF+
CN1-1
External Speed Limit Input
V-REF-
CN1-2
·Inputs an analog voltage reference as the servomotor speed limit value during torque control.
·The smaller value is enabled, the speed limit input from V-REF or the Pn406 (speed limit during torque control) when
Pn005=H.□□1□.
·The setting in Pn300 determines the voltage level to be input as the limit value. Polarity has no effect.
Pn300
Analog Speed Reference Input Gain
Setting Range
Setting Unit
Factory Setting
Setting Validation
0~3000
rpm/v
150
Immediately
·Set the voltage level for the speed that is to be externally limited during torque control.
Torque
Position
Torque
Speed