Hitachi SJ300 Series Select, Analog Input, Current/Voltage

4–26

Using Intelligent Input Terminals

Operations and Monitoring

Analog Input

Current/VoltageSelect

The [AT] terminal operates in conjunction with parameter setting A005 to determine the analog input terminals that are enabled for current or voltage input. Setting A006 determines whether the signal will be bipolar, allowing for a reverse direction range. Note that current input signal cannot be bipolar and cannot reverse direction (must use [FW] and [RV] command with current input operation). The following table shows the basic operation of the [AT] intelligent input.

Please refer to “Analog Input Operation” on page 4–59 for more information on bipolar input configuration, and the operating characteristics of analog inputs.

Opt.

Symbol

Function Name

Input

Description

Code

State

16

AT

Analog Input

ON

• With A005 = 00, [AT] will enable

Voltage/current

terminals [OI]–[L] for current input,

Select

4 to 20mA

• With A005=01, [AT] will enable termi-

nals [O2]–[L] for voltage input

OFF

Terminals [O]–[L] are enabled for voltage

input (A005 may be equal to 00 or 01) in

this case

Valid for

C001, C002, C003, C004,

Example: (Default input configuration

inputs:

C005, C006, C007, C008

shown—see page 3–47. Jumper position

shown is for –xFU/-xFR models; for –xFE

Required

A001 = 01

models, see page 4–12.)

A005 = 00 / 01

settings:

AT

A006 = 00 / 01 / 02

TH

FW

8

CM1

5

3

1

Notes:

• Be sure to set the frequency source setting

P24

PLC

CM1

7

6

4

2

A001=01 to select the analog input terminals.

See I/O specs on page 4–9.