Omron RX2 Series - Torque Limit Function

7 Advanced Settings
7 - 48
High-function General-purpose Inverter RX2 Series User’s Manual
This limits torque when the speed is controlled. Contact positioning control, etc. can limit the torque
increase.
In the case of using [AA121] control method, sensorless vector control, sensorless vector control in the
zero speed area, and sensor vector control, this limits output torque of the motor. However, when
Zero-Hz range sensorless vector control is used, the control to output the torque is prioritized within a
Zero-Hz range.
Speed control/position control/torque control are enabled.
The torque limit function is set in [bA110].
When a torque limiting signal is selected in output selection, the output terminal 022 [TRQ] torque limit-
ing signal will be turned ON once the torque limit function above starts operation.
Precautions for Correct Use
• If the torque liming function [TL] is set to an input terminal, the torque limit function set to
[bA110] will be enabled, only when [TL] is turned ON. When it is OFF, the torque limit setting
will be disabled and the torque limit value will be the maximum value.
• If the torque liming function [TL] is not set to an input terminal, the torque limit function set to
the torque limit selection [bA110] will be enabled constantly.
• To calculate the motor rated torque (100%) in this function, use the following formula.
Motor rated torque = 79.58 × Motor capacity × Number of poles/Base frequency
Example: Motor rated torque = 79.58 × 5.5 (kW) × 4 (P)/50 (Hz) ≈ 35 Nm
Therefore, the output torque varies depending on the combined motor. Note that it is not the
absolute value of torque.
 Parameter
Control gain switch
[CA-01] to
[CA-11]
064 Switches gains by the [CAS] terminal.
-
PPI control switch 063
Switches PI control and P control by the [CAS]
terminal.
7-3-4 Torque Limit Function
Item Parameter Data Description
Default
data
Torque limit
selection,
1st-motor
[bA110] 00 to 11
00 (Disable/01)/01 (Ai1 terminal input)/
02 (Ai2 terminal input)/03 (Ai3 terminal input)/
04 (Reserved)/05 (Reserved)/06 (Reserved)/
07 (Parameter setting)/08 (RS 485)/
09 (Option 1)/10 (Option 2)/11 (Option 3)
07
Torque limit param-
eter mode
selection,
1st-motor
[bA111]
00 Four Quadrant specific
00
01 [TRQ] terminal switch
Torque limit 1
Torque limit 2
Torque limit 3
Torque limit 4
[bA112]
[bA113]
[bA114]
[bA115]
0.0 to
500.00(%)
The torque limit function will operate when out-
put torque exceeds this set value.
150.0
Item Parameter Data Description
Default
data