Omron RX Series User Manual page 278

6 Vector Control
5
Operations in case of error
If auto-tuning is aborted by an error, review the preset parameters and check the rated motor
torque ratio of the inverter to that of the motor. If the load is too heavy, disconnect the load and
retry auto-tuning.
If the error persists or auto-tuning is still aborted, enter the motor parameter values directly.
For details, refer to 6-2-4 Motor Parameter Settings on page 6-11.
Precautions for Correct Use Precautions for Correct Use
• If a trip error occurs during auto-tuning, the auto-tuning process will be force-terminated. In
this case, the inverter displays the alarm code for the trip error in preference to the abort
display. Check the cause of the trip error.
• If the auto-tuning process does not terminate, press the STOP/RESET key. Then, the process
will be force-terminated. Review the preset parameters and retry auto-tuning.
• If the auto-tuning process is terminated by STOP command input by pressing the STOP key or
by turning OFF the RUN command, the parameters for auto-tuning may be left in the inverter.
• When the control method is set to Free V/f setting, starting offline auto-tuning causes the
inverter to terminate the process with the abort display.
Online Auto-Tuning Function
• The performance of sensorless vector control is sufficiently provided by simply executing offline
auto-tuning.
• However, motor parameter values change with time due to a temperature rise in the motor and many
other aspects. To compensate for such changes in the motor parameter values to perform more
stable operation with less speed changes, use the online auto-tuning function.
• The online auto-tuning function, measures the motor parameter values each time the inverter stops
the operation and applies them to the motor parameters used for sensorless vector control.
• This function is applicable to the 1st and 2nd control methods only. It cannot be used for the 3rd
control method.
Parameter
No.
1st/2nd Motor Parameter
H002/H202
selection
Note the following points before using this function.
• Before using the online auto-tuning function, be sure to perform offline auto-tuning. The data
required for online auto-tuning is calculated during offline auto-tuning.
• The online auto-tuning function will be activated for up to 5 seconds after the motor stops. (The
inverter executes DC excitation once for tuning the Motor Parameters R1 and R2, this result is not
displayed, however). If the RUN command is input during this period, the online auto-tuning
process will be aborted at that point because the RUN command is given priority. (In this case, the
tuning result will not be reflected.)
• If the DC injection braking on jogging stop function is enabled, online auto-tuning will start after
DC injection braking is completed.
• When the Multi-function Input S1 to S8 Selection (C001 to C008) is set to 54 (SON) or 55 (FOC),
the online auto-tuning function is not performed.
6 - 10
Function name
00: Standard motor parameter
01: Auto-tuning
02: Auto-tuning (Online auto-tuning enabled)
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
Data
00
Default
Unit
data
–