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Chapter 4
auto-tuning.
Note10: Do not start auto-tuning with setting servo-on(54:SON )and forcing function(55:FOC) to the intelligent
terminals. You should remove these functions and start auto-tuning in this case. Please set these functions
after normal termination of auto-tuning and confirming good motor rotation.
Note11: If you set control mode(A044) to vector control with sensor(05),you should not set V2 control mode(P012) to
position control mode(01:APR,02:APR2,03:HAPR).Do not also use torque control ,torque bias control. You
should use these functions after normal termination of auto-tuning and confirming good motor rotation.
Note 12: If auto-tuning has finished , once turn off power source of inverter and turn on.
4.2.93 Online auto-tuning function
The online auto-tuning function allows you to compensate the motor constants for alterations caused by the rise of
motor temperature and other factors to ensure stable motor operation.
The online auto-tuning function applies only to the 1st motor and 2nd motor controls. Do not apply this function to
the 3rd motor control.
Item
Motor constant selection
When using this function, follow the instructions below.
1) Be sure to perform the offline auto-tuning before the online auto-tuning.
2) Since the data for online tuning is calculated by the offline auto-tuning, perform the offline tuning at least once,
even when the inverter is used to drive a Hitachi general-purpose motor.
3) The online auto-tuning operates for a maximum of 5 seconds after the motor has stopped. (DC excitation is
executed once to tune constants R1 and R2. The result of tuning is not reflected in the data displayed on the
monitor.) If an operation command is input during the auto-tuning operation, the online auto-tuning ends midway
because the operation command has priority over the online auto-tuning. (In such cases, the result of tuning is not
reflected in the inverter settings.)
4) When the DC braking at stopping has been specified, the online tuning is performed after the DC braking
operation ends.
5) When FOC, SON terminals are assigned, online auto-tuning is not executed.
Operating procedure
1) Specify "02" (enabling the online auto-tuning) for the motor constant selection "H002". (Specify "00" [disabling
the auto-tuning] for the Auto-tuning Setting "H001".)
2) Input an operation command. (The inverter will automatically perform the online auto-tuning after the motor
stops.)
4.2.94 Secondary resistance compensation (temperature compensation) function
The secondary resistance compensation function allows you to compensate for the
secondary resistance to control the motor speed fluctuations due to the changes in
the motor temperature. This function can operate when the control mode is the
sensorless vector control, 0Hz-range sensorless vector control, or vector control
with sensor.
(Use the thermistor model PB-41E made by Shibaura Electronics Corporation.)
When using this function, specify "02" (NTC) for the thermistor for thermal protection control (b098). (With a
thermistor other than the PB-41E or another setting of the thermistor for thermal protection control, the motor
temperature cannot be detected correctly.)
Item
Temperature compensation
thermistor enable
Function code
Data
00
H002/H202
01
02
Function code
Data
P025
Explanation of Functions
Hitachi general-purpose motor data
Automatically tuned data
Automatically tuned data (online auto-tuning enabled)
00
Disabling the secondary resistance compensation
01
Enabling the secondary resistance compensation
4-87
Description
Related code
P025: Temperature compensation
thermistor enable
b098: Thermistor for thermal
protection control
Description
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