Estun ProNet Plus Series - Torque Limiting Using an Analog Voltage Reference

ProNet Plus Series AC Servo User's Manual
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(3)Changes in Output Torque during External Torque Limiting
Example: External torque limit (Pn401, Pn402) set to 300%
/P-CL(Forward External Torque Limit Input)
High level
Low level
/N-CL
(Reverse
External
Torque
Limit Input)
High
level
Speed
Torque
Pn401
Pn402
0
Speed
Torque
Pn402
0
Pn403
Low
level
Speed
Torque
Pn401
0
Pn404
Speed
Torque
0
Pn404
Pn403
Note: Select the servomotor rotation direction by setting Pn001=b.□□□0 (standard setting, CCW=Forward direction).
4.9.3 Torque Limiting Using an Analog Voltage Reference
NOTE: this function is available for ProNet-□□□MG servo drives only.
Torque limiting by analog voltage reference limits torque by assigning a torque limit in an analog voltage to the T-REF
terminals (CN1-26,27). This function can be used only during speed or position control, not during torque control.
Refer to the following block diagram when the torque limit with an analog voltage reference is used for speed control.
Servodrive
Torque reference
input gain（Pn400)
Speed reference input
gain（Pn300)
V-REF
T-REF
Torque limit value
Speed reference
Speed loop gain
(Pn102)
Speed loop
integral time
constant
(Pn103)
Pn402
(reverse rotation torque limit)
Torque reference
Pn401
(forward rotation torque limit)
Speed feedback
+
—
+
+
Important:
·There is no issue with input voltage polarity of the analog voltage reference for torque limiting.
·The absolute values of both + and – voltages are input, and a torque limit value corresponding to that absolute
value is applied in the forward or reverse direction.
Related Parameters
Parameter
Meaning
Pn001
b.□1□□
Use the T-REF terminal to be used as an external torque limit input.