Hitachi SJ300 Series manual 204

4–66

Operations and Monitoring

Setting Motor Constants for Vector Control

Func.	Name	Data	Notes
H031	Auto-tuned constant R2, 1st motor	0.000–65.53	Units: ohms
H032	Auto-tuned constant L, 1st motor	0.00–655.3	Units: mH
H033	Auto-tuned constant Io, 1st motor	0.00–655.3	Units: A
H034	Auto-tuned constant J, 1st motor	0.001–9999	Units: kgm2

The inverter has three separate motor constant sets named 1st, 2nd, and 3rd. The 1st motor constant set is the default, while the SET and SET2 intelligent inputs select the 2nd and 3rd constant sets, respectively. The torque control methods are valid to use only if a particular motor constant set includes parameters for the selected control method. The following table lists the vector control methods and shows the ones that are valid for each motor constant set.:

Vector Control Method	1st motor	2nd motor	3rd motor
V/f constant torque	✔	✔	✔
V/f variable torque	✔	✔	✔
V/f free-setting curve	✔	✔	✘
Sensorless vector control (SLV)	✔	✔	✘
Sensorless vector control, 0Hz domain	✔	✔	✘
Vector control with encoder feedback	✔	✘	✘

The motor data selection is available only to the 1st motor constant set, selected by function H004. By default, the 2nd and 3rd motor constants sets only store standard motor parameters. The table below shows this arrangement.

Motor data selection	1st motor	2nd motor	3rd motor
Standard motor parameters	✔	✔	✔
Auto-tuning parameters	✔	✘	✘
Adaptive tuning parameters	✔	✘	✘

When motor constant values are available from the motor manufacturer, you can enter them directly. The available motor constant parameters (storage locations) depend on the motor constant set (1st, 2nd, or 3rd) according to the following table.

Motor data selection	1st motor	2nd motor	3rd motor
Standard motor parameters	H020 to H024	H220 to H224	—
Auto-tuning parameters	H030 to H034	—	—
Adaptive tuning parameters	H030 to H034	—	—