5.8 Limiting Torque
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5.8
Limiting Torque
The multi-winding drive unit provides the following four methods for limiting output torque to protect the
machine.
Note: The maximum torque of the servomotor is used when the set value exceeds the maximum torque.
5.8.1
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: If the settings of Pn402 and Pn403 are too low, the torque may be insufficient for acceleration or deceleration of the
servomotor.
Torque waveform
Limiting Method
Description
Reference Sec-
tion
Internal torque limit
Always limits torque by setting the parameter.
5.8.1
External torque limit
Limits torque by input signal from the host controller.
5.8.2
Torque limiting by analog
voltage reference
Assigns a torque limit by analog voltage reference.
5.8.3
External torque limit + Torque
limiting by analog voltage ref-
erence
Combines torque limiting by an external input and by analog volt-
age reference.
5.8.4
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
