Torque Limit Function - Mitsubishi FX3U-20SSC-H User Manual

FX -20SSC-H Positioning Block User's Manual
3U
7.8.3

Torque limit function

The torque limit function sets the torque limit value for the servo amplifier from the 20SSC-H.
1. Torque limit function setting
Specify the following items to use the torque limit function.
Setting item
Zero return torque limit value
Torque limit setting
Torque output setting
2. Details of control
The operation with the torque limit is as follows.
Various operations
START command
Torque limit setting
(Positioning parameters)
Torque output setting
(Control data)
Stored torque limit
(Monitor data)
3. Precautions for control
• If the zero return torque limit value exceeds the torque limit setting, an error occurs.
• If the torque limit function causes the operation to stop, drop pulses remain in the deviation counter. After
the load torque is removed, the operation continues according to the remaining pulses.
58
→ For related parameters, control data and monitor data, refer to Section 7.11
Torque limit value for zero return control (creep)
The torque limit during the following operations is the torque limit setting or torque output setting
according to the torque output setting value.
- If the torque output setting is "0"
The torque is limited to the torque limit value or zero return torque limit value.
- If the torque output setting is between 1 and 10000 (increment: 0.1%)
The torque is limited to the torque output setting.
• During mechanical zero return at zero return speed (high speed)
• JOG operation
• 1-speed positioning operation
• Interrupt 1-speed constant quantity feed
• 2-speed positioning operation
• Interrupt 2-speed constant quantity feed
• Interrupt stop
• Variable speed operation
• Multi-speed operation
• Linear interpolation
• Linear interpolation (interrupt stop)
• Reciprocal movement instruction (Ver.1.10 or later)
• Manual pulse generator operation (Ver.1.10 or later)
ON
OFF
*1 , *2
*1 , *2
0
*1 :
The torque limit setting or torque output setting becomes valid at the rising edge of the START
signal. If the torque output setting is "0," operation is made with the torque limit setting.
*2 : If the positioning parameter setting is changed, issue a positioning control parameter command
to validate the new setting.
7 Before Starting Positioning Operation
Description
ON
OFF
300
100
300
7.8 Other functions
OFF
200
100