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4 Analog Input

FX

3G

/FX

3U

/FX

3UC

 PLC User's Manual - Analog Control Edition

FX

3U

-4AD/FX

3UC

-4AD (4-channel Analog Input)

This chapter describes the minimum programming necessary to readout the 4AD analog data.
Follow the procedure below to confirm that the analog data can be properly read out.

Unit numbers from 0 to 7 will be assigned to the special function units/blocks starting from the left.
When units/blocks are connected to the FX

3UC

-32MT-LT(-2) PLC, unit numbers from 1 to 7 are

assigned. Check the unit number assigned to the 4AD.

Depending on the analog signal generator to be connected, set the input mode (BFM #0) for each
channel.

Use hexadecimal numbers for input mode setting. Set the corresponding channel digit to the input
mode setting value specified in the following table:

→ For a detailed description of the standard input characteristics, refer to Section 2.4.

→ For a detailed description of the input mode (BFM #0), refer to Subsection 5.4.1.

0

Voltage input mode

-10V to +10V

-32000 to +32000

1

Voltage input mode

-10V to +10V

-4000 to +4000

2

Voltage input
Analog value direct indication mode

-10V to +10V

-10000 to +10000

3

Current input mode

4mA to 20mA

0 to 16000

4

Current input mode

4mA to 20mA

0 to 4000

5

Current input mode
Analog value direct indication mode

4mA to 20mA

4000 to 20000

6

Current input mode

-20mA to +20mA

-16000 to +16000

7

Current input mode

-20mA to +20mA

-4000 to +4000

8

Current input mode
Analog value direct indication mode

-20mA to +20mA

-20000 to +20000

F

Channel not used

Main unit

(FX

3U

 Series

PLC)

Input/output

extension

block

Special

function block

Special

function block

Input/output

extension

block

Special

function unit

Unit

number: 0

Unit

number: 1

Unit

number: 2

H

ch4

ch3

ch2

ch1