Hitachi SJ700-2 Frequency upper limit setting, When the O-L or OI-L terminal is used

Related code

A061/A261: /Frequency upper limit setting, 1st/2nd motors

A062/A262: Frequency lower limit setting, 1st/2nd motors

Chapter 4 Explanation of Functions

4.2.20 Frequency upper limit setting

The frequency upper limit setting function allows you to place upper and lower limits on the inverter output frequency.

This function restricts the input of frequency commands that specify any frequencies outside the upper and lower limits.

Always set the upper limit before setting the lower limit. Also, be sure to keep the frequency upper limit (A061/A261) larger than the frequency lower limit (A062/A262).

Be sure that upper limit/lower limit does not exceed Maximum frequency (A004/A204/A304).

Be sure to set output frequency (F001) and multiple speed 1 to 15 (A021 to A035) in between uppelimit and lower limit.

If 0 Hz is set for the frequency upper and lower limits, they will not operate.

The frequency limit setting function is disabled when the 3rd control system is selected.

Item	Function code	Range of data	Description
Frequency upper		0.00 or a frequency more than the	Setting of the upper limit of the
	A061/A261	frequency lower limit setting up to the
limit setting			output frequency
		maximum frequency (Hz)
Frequency lower	A062/A262	0.00 or a frequency not less than the	Setting of the lower limit of the
		starting frequency up to the frequency
limit setting			output frequency
		upper limit setting (Hz)

(1) When the O-L or OI-L terminal is used:

Output frequency (Hz)

Maximum frequency

A004/A204

A061
A062
0	V	10	V
4	mA	20	mA

If 0 V or 4 mA is input as the frequency command when a frequency lower limit has been set for the frequency lower limit setting (A062), the inverter will output the set frequency.

Frequency command

(2) When the O2-L terminal is used:

Maximum frequency

A004/A204

		A061
Reverse rotation	-10 V	A062

Forward rotation

A062 10 V

A061

Maximum frequency

A004/A204

If the frequency lower limit is used with the frequency command input via the O2-L terminal, the motor speed with 0 V input will be fixed to the frequency setting of the frequency lower limit (A062) for forward rotation or the frequency setting of the frequency lower limit (A062) for reverse rotation as shown below.

(a) When operation commands are input via the control circuit terminal block (A002: 01)

Terminal	Motor speed with 0 V input via O2 terminal
FW(ON)	Frequency setting by A062 for forward rotation
RV(ON)	Frequency setting by A062 for reverse rotation

(b) When operation commands are input from the digital operator (A002: 02)

F004	Motor speed with 0 V input via O2 terminal
00	Frequency setting by A062 for forward rotation
01	Frequency setting by A062 for reverse rotation

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