Analog Data Reading; Procedure For Reading Out Of Analog Data - Mitsubishi MELSEC-F FX3U Series User Manual

FX /FX Series PLC User's Manual - Analog Control Edition
3U 3UC
FX -4AD (4-channel Analog Input)
3UC
4.

Analog Data Reading

This chapter describes the minimum programming necessary for readouts of the analog data by 4AD.
Follow the procedure below to confirm that the analog data can be properly read out.
4.1

Procedure for Reading Out of Analog Data

1
Unit number check
When special function units/blocks, such as 4AD, are connected to the main unit (FX
PLC), unit numbers will be sequentially assigned to the connected units/blocks starting from the
unit/block next to the main unit. Check the unit number assigned to 4AD.
Unit number: 0
(Incorporated
CC-Link/LT)
FX
3UC
-LT
Main unit
2
Input mode (BFM #0) setting
Depending on the analog signal generator to be connected, set the input mode (BFM #0) for each
channel.
Use the hexadecimal numbers for input mode setting. Set the digit of the corresponding channel to
the input mode setting value specified in the following table:
Setting
value
0 Voltage input mode
1 Voltage input mode
Voltage input
2
Analog value direct indication mode
3 Current input mode
4 Current input mode
Current input mode
5
Analog value direct indication mode
6 Current input mode
7 Current input mode
Current input mode
8
Analog value direct indication mode
F No channels used
B-16
Unit number: 1 Unit number: 2
-32MT Input/output
Special
extension
function block
block
H
ch4
ch3
Input mode
→ 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.
4.1 Procedure for Reading Out of Analog Data
Input/output
Special
extension
function block
block
ch1
ch2
Analog input
Digital output range
range
-10V to +10V -32000 to +32000
-10V to +10V -4000 to +4000
-10V to +10V -10000 to +10000
4mA to 20mA 0 to 16000
4mA to 20mA 0 to 4000
4mA to 20mA 4000 to 20000
-20mA to +20mA -16000 to +16000
-20mA to +20mA -4000 to +4000
-20mA to +20mA -20000 to +20000
4 Analog Data Reading
3UC
Unit number: 3
Special
function unit
Resolution
0.32mV
2.50mV
1.00mV
1.25µA
5.00µA
1.25µA
1.25µA
5.00µA
1.25µA
Series