Using The Analog Terminal; Analog Input (O/Oi); External Analog Input (O/Oi) Filter Setting (A016) - Hitachi NES1-004SB Quick Reference Manual

Chapter 7 Explanation of Functions

7.4 Using the analog terminal

7.4.1 Analog input (O/OI)

This inverter has an external analog input terminal.
If you want to switch the voltage and current inputs, use the switch on the board(SW6).
Voltage input : 0 to 10V (Variable resistor is a voltage input.)
Current input : 0 to 20mA (Please set the case of "4 to 20mA"to "A013=20%")
The analog input signal can be assigned the following functions.
Item
Frequency command
PID enable
PV source
Example of wiring
Variable resistor
(1k to 2k)
H O/OI L
Please refer to section 3.2 about SW6 setting.
7.4.2 External analog input (O/OI) filter setting [A016]
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
External frequency filter
time const.
Function
code
A001 01
01(PID Enable)
A071
02(PID Enable with reverse output)
A076 01(O/OI)
Voltage input
(0 to 10V)
H O/OI L
Function code Range of data
A016 1. to 30. or 31.
Data
+ -
Setting of 1. to 30.: "Set value x 2" ms filter
Setting of 31.: 500 ms filter (fixed) with hysteresis
of ±0.1 Hz
7 - 16
Description
01：O/OI input
Current input
(0/4 to 20mA)
H O/OI L
Description