Hitachi SJ700-4000HFU2

Chapter 4 Explanation of Functions
4-15
(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
(Example 3)
02 end frequency
A112
-400. to 400.(Hz)
Setting of the end frequency
02 start-frequency
rate
A113
-100. to 100.(%)
Setting of the rate of the start frequency to
the external frequency command (-10 to
+10 V) (*1)
02 end-frequency
rate
A114
-100. to 100.(%)
Setting of the rate of the end frequency to
the external frequency command (-10 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".
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
time const.
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 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.
Item
Function code
Range of data
Description
V/f gain setting
A045
20. to 100. (%)
Setting of the rate of reducing the output voltage
(Example 3)
A111
A114
A113
A112
(-10V)
-100%
(+10V)
100%
Maximum frequency for
forward operation
Analog input (O2)
Maximum frequency for
reverse operation
A045: V/f gain setting
A082: AVR voltage select
Related code
A045
AVR voltage
select
(100%)
Base
frequency
Maximum
frequency
A016: External frequency filter
time const.
Related code