Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Manual (Page 112)

4.4 Limiting Torque
4-29
Operation
4.4 Limiting Torque
The SERVOPACK provides the following three methods for limiting output torque to protect the machine.
4.4.1 Internal Torque Limit
This function always limits maximum output torque by setting values of following parameters.
The setting unit is a percentage of the rated torque.
Note 1. Too small a torque limit setting will result in insufficient torque during acceleration and deceleration.
2. The maximum torque of the servomotor is used whenever the value exceeds the maximum torque is set.
Waveform of Torque
Limiting Method Description
Reference
Section
Internal torque limit Always limits torque by setting the parameter. 4.4.1
External torque limit Limits torque by input signal from the host controller. 4.4.2
Torque limit with command
option module
Limits torque by inputting a desired torque limit command to the
command option module from the host controller.
Refer to the manual
of the command
option module to
be connected.
Pn402
Forward Torque Limit
Classification
Setting Range Setting Unit Factory Setting When Enabled
0 to 800 1% 800 Immediately Setup
Pn403
Reverse Torque Limit
Classification
Setting Range Setting Unit Factory Setting When Enabled
0 to 800 1% 800 Immediately Setup
Speed Position Torque
Speed Position Torque
Speed
Maximum torque
t
Speed
Pn403
Pn402
Limiting torque
t
No Internal Torque Limit
(Maximum Torque Can Be Output)
Internal Torque Limit