Hitachi L200 Analog Input Current/Voltage Select

4–23

L200 Inverter

Analog Input Current/Voltage Select

The [AT] terminal selects whether the inverter uses the voltage [O] or current [OI] input terminals for external frequency control. When intelligent input [AT] is ON, you can set the output frequency by applying a current input signal at [OI]-[L]. When the [AT] input is OFF, you can apply a voltage input signal at [O]-[L] to set the output frequency. Note that you must also set parameter A001 = 01 to enable the analog terminal set for controlling the inverter frequency.

Option

Terminal

Function Name

Input

Description

Code

Symbol

State

16

AT

Analog Input

ON

Terminal OI is enabled for current input (uses

Voltage/current

terminal L for power supply return)

Select

OFF

Terminal O is enabled for voltage input (uses

terminal L for power supply return)

Valid for inputs:

C001, C002, C003, C004,

Example (default input configuration shown

C005

for –FU models; –FE models require input

Required settings:

A001 = 01

configuration—see page

3–42):

Notes:

AT

• If the [AT] option is not assigned to any intelligent

L

5

4

3

2

1

PCS

input terminal, then inverter uses the algebraic sum

of both the voltage and current inputs for the

frequency command (and A001=01).

• When using either the analog current and voltage

input terminal, make sure that the [AT] function is

allocated to an intelligent input terminal.

• Be sure to set the frequency source setting

A001=01 to select the analog input terminals.

AM

H

O

OI

L

4-20 mA, AT=ON

+ – 0-10 V, AT=OFF

See I/O specs on page 4–6.

Operations Monitoring and