Hitachi J300U Series instruction manual Autotuning start Setting method, Precautions

Autotuning start

[Setting method]

(1) Digital operator

A97

A 97

➤

FUNC

FUNC

➤

00

➤

01

Display the A 9 7 software switch and set it to the data (01) for starting autotuning setting.

When the equipment starts running after the data is set, the autotuning measurement is executed.

(2) Remote operator

F-05		AUX
Initial display		FUNC
	➤
AUX	AUTO	NOR
		× 2
	➤
AUX	AUTO	AUT
		STR
	➤	MON
FS0050.0		0.0Hz

F-05 motor constant setting is displayed. Display the AUX AUTO screen and select AUT or NRT.

Autotuning

NOR: Setting OFF and autotuning end

AUT: Autotuning measurement start (Motor rotates)

NRT: Autotuning measurement start (Motor does not rotates)

When the equipment starts running after the data is set, the autotuning measurement is executed.

When the autotuning operation terminates, “Display at end” indicated on A-4 page is displayed. When the autotuning operation temiantes normally, see the “running method by autotuning data” indicated on A-5 page.

When the autotuning fails, set “measurement start” once again and perform rerunning.

When

A 9 7

is set to

on the digital operator or NRT is selected on the remote opera-

tor, auto tuning is performed in a mode in which the motor does not run (only AC excitation and DC excitation are possible). Then, the value of motor constants R1, R2, and L are meas- ured.

Precautions

1.When the autotuning function is executed in the state that the DC braking is set, the accu- rate motor constant will not be set. Cancel the DC braking the then start measurement.

2.By the autotuning function, a capacity between the applicable motor capacity and motor capacity under one frame can be set.

3.When acceleration or speeding up is not to be performed in the operation for accelerating up to 80% of the base frequency, lower the set value of manual torque boost.

4.The autotuning measurement time is about 2 minutes or so. However, the measurement time may be increased depending on the load inertia. When the measurement time exceeds 5 minutes, press the STOP key so as to decrease the set value of manual torque boost and enter the run command once again.

5.Be sure if motor is in standstill before you carry out an autotuning. Autotuning data car- ried out when motor is still running may be not correct.

6.Do not interrupt an autotuning with power off or any stop command except emergency case. It may case data lose.

In it is occurred, make an initialization and reprogram what you need, and carryout

autotuning again. A-2