Omron RX Series - Page 358

7 Detailed Functions
7 - 32
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
• In the 3G3RX-V1 Series Inverter, the default data for the 1st/2nd Torque Boost Selection
(A041/A241) was changed to 01 to enable the automatic torque boost function.
• The automatic torque boost function adds the voltage automatically calculated from the output
current to the output voltage set for the manual torque boost function to increase the output torque.
• To use the automatic torque boost function effectively, set the 1st/2nd Motor Capacity (H003/H203)
and the 1st/2nd Motor Pole Number (H004/H204) correctly according to your motor.
• To avoid possible overcurrent trip during deceleration, set the AVR Selection (A081) to 00 (Always
ON).
• To enable the slip compensation function in addition to the voltage compensation provided by the
automatic torque boost function, set the 1st/2nd Automatic Torque Boost Slip Compensation Gain
(A047/A247) to 100%.
• If the automatic torque boost does not provide the intended performance characteristics, adjust each
adjustment item shown in the following table.
A046
1st Automatic Torque
Boost Voltage
Compensation Gain
0. to 255. 100.
%
A246
2nd Automatic Torque
Boost Voltage
Compensation Gain
A047
1st Automatic Torque Boost
Slip Compensation Gain
0. to 255.
0.
*2
A247
2nd Automatic Torque Boost
Slip Compensation Gain
*1. To enable the switching to the 2nd/3rd control, allocate one of the Multi-function Input S1 to S8 Selection (C001
to C008) to 08 (SET) or 17 (SET3) and turn ON that terminal.
*2. The default data was changed from the previous model.
Automatic Torque Boost
Phenomenon Adjustment method
Adjustment
item
Insufficient torque at low
speeds
(Motor does not run at low
speeds.)
(1) Gradually increase the Automatic Torque Boost Voltage
Compensation Gain.
A046/A246
(2) Set the Automatic Torque Boost Slip Compensation Gain to
100. Then, increase the set value gradually.
A047/A247
(3) Gradually increase the Manual Torque Boost Voltage. A042/A242
(4) Decrease the Carrier Frequency. b083
Overcurrent trip occurs
when load is applied.
(1) Gradually decrease the Automatic Torque Boost Voltage
Compensation Gain.
A046/A246
(2) Set the Automatic Torque Boost Slip Compensation Gain to
100. Then, decrease the set value gradually.
A047/A247
(3) Gradually decrease the Manual Torque Boost Voltage. A042/A242
(4) Gradually decrease the Overload Limit Parameter. b023/b026
Phenomenon Adjustment method
Adjustment
item
Rotation speed decreases
when load is applied.
Gradually increase the Automatic Torque Boost Slip
Compensation Gain.
A047/A247
Rotation speed increases
when load is applied.
Gradually decrease the Automatic Torque Boost Slip
Compensation Gain.
A047/A247
Parameter No. Function name Data Default data Unit