Torque Limiting By Analog Voltage Reference - YASKAWA SGMAH User Manual

Sigma II User's Manual

5.2.10 Torque Limiting by Analog Voltage Reference

Torque limiting by analog voltage reference limits torque by assigning a torque
analog voltage to the T-REF terminal (CN1-9 and 10). It cannot be used for torque
control because the torque reference input terminal T-REF is used as an input
terminal.
Torque is limited at the forward run side when the P-CL signal turns ON; and is
limited at the reverse run side when the N-CL signal turns ON.
Torque limit value
Speed reference
Using Torque Limiting by Analog Voltage Reference
To use this function, set the following parameter to 3:
Parameter
Speed Control Option
Pn002.0
(T-REF Terminal Allocation)
This parameter can be used to enable torque limiting by analog voltage reference.
Pn002.0 Setting
0
1
2
3
This function cannot be used with the torque feed-forward function described in
5.2.8 Torque Feed-Forward Function.
To use this function, verify how input signals have been allocated. (Refer to Section
5.3.3 Input Circuit Signal Allocation). The following table outlines factory default
T-REF
Pn400
Speed loop
+
gain
V-REF
Pn300
(Pn100)
-
Speed feedback
Signal
None.
T-REF terminal used for external torque limit input.
T-REF terminal used for torque feed-forward input.
T-REF terminal used for external torque limit input when P-CL and N-CL are valid.
Chapter 5: Parameter Settings and Functions
(/N-CL: ON)
+
+
Integration
(Pn101)
Pn405
Pn403
(/N-CL: ON)
Torque limit
Setting
(rpm)
Default Setting: 0
T-REF Function
5 - 47
(/P-CL: ON)
Pn402
Pn404
(/P-CL: ON)
Torque
reference
Control Mode
Speed Control
Position Control