Hitachi SJ700-2 Online auto-tuning function, Automatically tuned data online auto-tuning enabled

Related code

P025: Temperature compensation thermistor enable b098: Thermistor for thermal protection control

Chapter 4 Explanation of Functions

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	Function code	Data	Description
Motor constant selection	H002/H202	00	Hitachi general-purpose motor data
		01	Automatically tuned data
		02	Automatically tuned data (online auto-tuning enabled)

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.

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	Function code	Data	Description
Temperature compensation	P025	00	Disabling the secondary resistance compensation
thermistor enable		01	Enabling the secondary resistance compensation

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