Hitachi SJ700-2 External analog input O/OI/O2 filter setting, 16 V/f gain setting

Maximum frequency for reverse operation

Related code

A016: External frequency filter time const.

Chapter 4 Explanation of Functions

(2) Start/end frequency settings for the O2-L terminal

Item	Function code	Range of data	Description	Remarks
02 start frequency	A111	-400. to 400.(Hz)	Setting of the start frequency
02 end frequency	A112	-400. to 400.(Hz)	Setting of the end frequency
02 start-frequency	A113	-100. to 100.(%)	Setting of the rate of the start frequency
			to the external frequency command (-10	(Example 3)
rate
			to +10 V) (*1)
02 end-frequency			Setting of the rate of the end frequency
	A114	-100. to 100.(%)	to the external frequency command (-10
rate
			to +10 V) (*1)

*1 The frequency rates correspond to the voltages (-10 to +10 V) of the external frequency command as follows:

-10 to 0 V: -100% to 0%

0 to +10 V: 0% to 100%

For example, if the voltage of the signal to be input to the O2-L terminal is -5 to +5 V, specify 50% for "A114".

(Example 3)

Maximum frequency for forward operation

(-10V) A112 -100% A113

		Analog input
A114	100%
A111	(+10V)	(O2)

4.2.15 External analog input (O/OI/O2) filter setting

The external analog input filter setting function allows you to set the input-voltage/input-current sampling time to be applied when frequency commands are input as external analog signals.

You can use this filter function effectively for removing noise from the frequency-setting circuit signal.

If the noise disables the stable operation of the inverter, increase the setting. Setting a larger value makes the inverter response slower. The filtering constant is "set value (1 to 30) x 2 ms."

When the setting is "31" (factory setting), a hysteresis of ±0.1 Hz is added to the filtering constant (500 ms).

Item	Function code	Range of data	Description
External frequency filter	A016	1. to 30. or 31.	Setting of 1. to 30.: "Set value x 2" ms filter
			Setting of 31.: 500 ms filter (fixed) with hysteresis
time const.
			of ±0.1 Hz

4.2.16 V/f gain setting

The V/f gain setting function allows you to change the inverter output voltage by specifying the rate of the output voltage to the voltage (100%) selected with the AVR voltage select function (A082).

If the motor operation is cranky, try to increase the gain setting.

Related code

A045: V/f gain setting

A082: AVR voltage select

Item	Function code	Range of data	Description
V/f gain setting	A045	20. to 100. (%)	Setting of the rate of reducing the output voltage

AVR voltage select (100%)

A045

Base Maximum frequency frequency

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