Hitachi J300U Series Base frequency setting, Maximum frequency, Frequency at the start of running

Extension

function

code

Contents and display

Set the base frequency and maximum frequency. Setting example

Base frequency setting

Setting method

	➤
2	1
FUNC	➤
➤

Initial value

	➤
2	1

V 100%

FUNC

➤

0

V
100%
0
60 Hz	60 Hz	120 Hz
f		f

Maximum frequency

➤

(A62) base frequency	(A62) base frequency: 60 Hz
and (A63) maximum	(A63) maximum frequency:
frequency: 60 Hz	120 Hz

setting

Maximum frequency selection

Frequency command output frequency adjust

(O-L, OI-L)

			(400)
When the frequency is set so that the base
frequency is larger than the maximum
frequency, the base frequency is forced					NOTE 1: When a frequency more than the base frequency 60 Hz
to be made equal to the maximum					is used, the motor is not a general purpose motor but
frequency at the start of running.					a special motor. Therefore, the maximum applicable
					motor set value is different.
		Freely setting range			When the kW display is the same, the inverter
V	➤			➤	capacity may be increased.
					NOTE 2: Set the base frequency according to the specifications
100% (NOTE 3)
					of the motor. When the base frequency is set to less
					than 50 Hz, the motor may be burned.
0	30 Hz	60 Hz	120 Hz	400 Hz
				f

Select 120 Hz or 400 Hz as the upper limit that can be set in the maximum frequency setting (A63).

➤ ➤

FUNC	Initial value
			➤
2			1
		➤

Adjust the relationship between the external frequency command and the inverter output frequency.

:Voltage command (O-L)

:Current command (OI-L)

This function is factory-set to the appropriate position. If this setting is changed unnecessarily, the correct relationship between the external frequency command and output frequency is no longer maintained. This will result in poor control performance. Adjust the setting of this function only when the output frequency does not conform to the external command.

Adjustment method
Voltage command: Put voltage command (10V of 5V) to O-L terminal, and adjust		unit
output frequency comes to maximum.
Current command: Put current command (4-20mH) to OI-L terminal, and adjust	unit
output frequency comes to maximum.

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