SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
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Chapter 4 Explanation of Functions<br />
(2) Start/end frequency settings for the O2-L terminal<br />
Item Function code Range of data Description Remarks<br />
02 start frequency A111 -400. to 400.(Hz) Setting of the start frequency<br />
02 end frequency A112 -400. to 400.(Hz) Setting of the end frequency<br />
02 start-frequency<br />
rate<br />
02 end-frequency<br />
rate<br />
A113 -100. to 100.(%)<br />
A114 -100. to 100.(%)<br />
Setting of the rate of the start frequency<br />
to the external frequency command (-10<br />
to +10 V) (*1)<br />
Setting of the rate of the end frequency<br />
to the external frequency command (-10<br />
to +10 V) (*1)<br />
(Example 3)<br />
*1 The frequency rates correspond to the voltages<br />
(-10 to +10 V) of the external frequency command<br />
as follows:<br />
-10 to 0 V: -100% to 0%<br />
0 to +10 V: 0% to 100%<br />
For example, if the voltage of the signal to be input to<br />
the O2-L terminal is -5 to +5 V, specify 50% for "A114".<br />
(Example 3)<br />
Maximum frequency for<br />
forward operation<br />
(-10V)<br />
-100%<br />
A113<br />
A112<br />
A111<br />
A114<br />
100%<br />
(+10V)<br />
Analog input<br />
(O2)<br />
4.2.15 External analog input (O/OI/O2) filter setting<br />
The external analog input filter setting function allows you to set the<br />
input-voltage/input-current sampling time to be applied when frequency<br />
commands are input as external analog signals.<br />
You can use this filter function effectively for removing noise from the frequency-setting circuit signal.<br />
If the noise disables the stable operation of the inverter, increase the setting. Setting a larger value makes<br />
the inverter response slower. The filtering constant is "set value (1 to 30) x 2 ms."<br />
When the setting is "31" (factory setting), a hysteresis of ±0.1 Hz is added to the filtering constant (500<br />
ms).<br />
Item Function code Range of data Description<br />
External frequency filter<br />
time const.<br />
4.2.16 V/f gain setting<br />
A016 1. to 30. or 31.<br />
The V/f gain setting function allows you to change the inverter output<br />
voltage by specifying the rate of the output voltage to the voltage (100%)<br />
selected with the AVR voltage select function (A082).<br />
If the motor operation is cranky, try to increase the gain setting.<br />
Maximum frequency for<br />
reverse operation<br />
Related code<br />
A016: External frequency filter time<br />
const.<br />
Setting of 1. to 30.: "Set value x 2" ms filter<br />
Setting of 31.: 500 ms filter (fixed) with hysteresis<br />
of ±0.1 Hz<br />
Related code<br />
A045: V/f gain setting<br />
A082: AVR voltage select<br />
Item Function code Range of data Description<br />
V/f gain setting A045 20. to 100. (%) Setting of the rate of reducing the output voltage<br />
AVR voltage<br />
select<br />
(100%)<br />
A045<br />
Base<br />
frequency<br />
Maximum<br />
frequency<br />
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