Online Auto Tuning - Mitsubishi Electric 800 Series Instruction Manual

13.4

Online auto tuning

Magnetic flux Sensorless Magnetic flux Magnetic flux
Sensorless Sensorless
If online auto tuning is selected under Advanced magnetic flux vector control or Real sensorless vector control, favorable torque
accuracy is retained by adjusting temperature even when the resistance value varies due to increase in the motor temperature.
Pr. Name
95
Online auto tuning selection
C111
574
Second motor online auto tuning
C211
717 Starting resistance tuning
C182 compensation coefficient 1
720 Starting resistance tuning
C188 compensation coefficient
741 Second motor starting resistance
C282 tuning compensation coefficient 1
737 Starting resistance tuning
C288 compensation coefficient 2
 Online auto tuning at startup (Pr.95/Pr.574 = "1")
• By promptly tuning the motor status at startup, accurate operation without being affected by motor temperature is achieved.
Also high torque can be provided at very low speed and stable operation is possible.
• Make sure to perform offline auto tuning before performing online auto tuning.
Operating procedure
1.
Perform offline auto tuning. (Refer to
2.
Check that Pr.96 Auto tuning setting/status = "3" (offline auto tuning completion) and values other than "9999"
are set in Pr.717 (Pr.741) and Pr.720 (Pr.737).
3.
Set Pr.95 Online auto tuning selection = "1" (online auto tuning at start).
Online auto tuning is enabled at the next start.
4.
Check that the following parameters are set before starting operation.
Pr.
9 Rated motor current or electronic thermal O/L relay
71 Applied motor
80
Motor capacity (with the rated motor current equal to or less than the inverter rated current)
81 Number of motor poles
*1 If a motor with substantially low rated current compared with the inverter rated current is used, speed and torque accuracies may deteriorate due
to torque ripples, etc. Set the rated motor current to about 40% or higher of the inverter rated current.
5.
In the PU operation mode, press the RUN key on the operation panel.
In the External operation, turn ON the start command (STF signal or STR signal).
Initial value Setting range
0
0
1
0 0, 1
9999
9999
0% to 200%
9999
9999
0% to 200%
9999
9999
0% to 200%
9999
9999
0% to 200%
page 309.)
Description
Description
No online auto tuning
Online auto tuning is performed at startup.
Select online auto tuning for the second motor.
(The settings are the same as those in Pr.95.)
100%
R1 compensation coefficient for start-time
tuning
100%
R2 compensation coefficient for start-time
tuning
100%
R1 compensation coefficient for start-time
tuning (for the second motor)
100%
R2 compensation coefficient for start-time
tuning (for the second motor)
*1
13.(C) Motor Constant Parameters
13.4 Online auto tuning
11
12
13
14
15
16
17
18
19
20
325