Hitachi SJ700-2 instruction manual Offline auto-tuning function

Related code

H001: Auto-tuning Setting

H002: Motor data selection, 1st motor

H003: Motor capacity, 1st motor

H004: Motor poles setting, 1st motor

H030: Auto constant R1, 1st motor

H031: Auto constant R2, 1st motor

H032: Auto constant L, 1st motor

H033: Auto constant Io, 1st motor

H034: Auto constant J, 1st motor

A003: Base frequency setting

A051: DC braking selection

A082: AVR voltage select

b046: Reverse run proctection enable

Chapter 4 Explanation of Functions

4.2.92 Offline auto-tuning function

The offline auto-tuning function allows you to make the inverter automatically measure and set the motor constants that are required for the sensorless vector control, 0Hz-range sensorless vector control, and vector control with sensor.

When using the inverter to perform the sensorless vector control, 0Hz-range sensorless vector control, and vector control with sensor for a motor of which the motor constants are unknown, measure the motor constants with the offline tuning function.

When "00" (Hitachi general-purpose motor data) is specified for the motor constant selection (H002/H202), the motor constants of

Hitachi's general-purpose motors are set as defaults. When you drive a Hitachi's general-purpose motor with the inverter, you can usually obtain the desired motor characteristics without problems. (If you cannot obtain the desired characteristics, adjust the motor constant settings as described in Section 4.2.92 or 4.2.93.)

If you intend to use the online tuning function described later, be sure to perform offline auto-tuning beforehand.

The offline auto-tuning function applies only to the 1st motor and 2nd motor controls. Do not apply this function to the 3rd motor control.

The motor constant data corresponding to the date of one phase of γ connection at 50 Hz.

Item	Function code	Data or range of data	Description
		00	Disabling the auto-tuning
Auto-tuning Setting	H001	01	Enabling the auto-tuning (without
			motor rotation)
		02	Enabling the auto-tuning (with motor
			rotation)
		00	Hitachi general-purpose motor data
Motor data selection	H002/H202	01	Automatically tuned data
		02	Automatically tuned data (online
			auto-tuning enabled)
Motor capacity	H003/H203	0.2 to 75.0 (kW)
Motor poles setting	H004/H204	2, 4, 6, 8, or 10 (poles)
Auto constant R1	H030/H230	0.000 to 65.53 (Ω)
Auto constant R2	H031/H231	0.000 to 65.53 kgm2
Auto constant L	H032/H232	0.00 to 655.3 (mH)
Auto constant Io	H033/H233	0.00 to 655.3 (A)
Auto constant J	H034H234	0.001 to 9999. (kgm2)
Base frequency	A003	30 to maximum frequency setting
setting		(Hz)
DC braking enable	A051	00	Disabling DC braking
		01	Enabling DC braking
		200, 215, 220, 230, or 240	Selectable only for 200 V class
AVR voltage select	A082		models
		380, 400, 415, 440, 460, or 480	Selectable only for 400 V class
			models

When using this function, follow the instructions below.

1)Adjust the settings of base frequency (A003) and AVR voltage select (A082) to the motor specifications. When motor voltage is other than the altanatives, set as ”motor voltage (A082) “ * ”outputr voltage gain (A045) “ = “motor rated voltage”

2)This function can properly apply to only the motors in the maximum applicable capacity class of your inverter or one class lower than the capacity class of your inverter. If this function is used for motors with other capacities, correct constant data may not be obtained. (In such cases, the auto-tuning operation may not be completed. If the auto-tuning operation is not completed, press the STOP/RESET key. The operation will end with an error code displayed.)

3)If "01" (enabling) is specified for the DC braking enable (A051), motor constants cannot be measured by offline auto-tuning. Specify "00" (disabling) for the DC braking enable. (The default setting is "00".)

4)If "02" (auto-tuning with motor rotation) is specified for the Auto-tuning Setting (H001), confirm or observe the following:

a)No problem occurs when the motor rotates at a speed close to 80% of the base frequency.

b)The motor is not driven by any other external power source.

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