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1 Outline
1.1 Outline of Functions
A
Common Items
B
FX
3U
-4AD
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3G
-2AD-BD
E
FX
3U
-4DA
F
FX
3U
-4DA-ADP
G
FX
3G
-1DA-BD
H
FX
3U
-3A-ADP
I
FX
3U
-4AD-PT
-ADP
J
FX
3U
-4AD-PTW
-ADP
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX3U-4AD/FX3UC-4AD (4-channel Analog Input)
1. Outline
This chapter outlines the FX3U-4AD/FX3UC-4AD.
For common descriptions of the FX
3U-4AD and FX3UC-4AD, these model names are referred to as the 4AD.
1.1 Outline of Functions
The FX3U-4AD is an analog special function block which is connectable with the FX3G, FX3U and FX3UC
Series PLC used to capture 4-ch voltage/current data. The FX3UC-4AD cannot be connected to the FX3G/
FX
3U Series PLC.
1) Up to 8
*1
units can be connected to the FX3G/FX3U/FX3UC Series PLC.
(including the other special function blocks).
2) Either "voltage input" or "current input" can be specified for each channel.
3) The A/D conversion values will be stored in the 4AD buffer memory (BFM).
4) Set the digital filter to read out stable A/D conversion values.
5) For each channel, up to 1,700 A/D conversion values can be stored as history data.
*1. Up to 7 units can be connected to the FX
3UC-32MT-LT(-2) PLC.
*2. This function is just available for FX
3U and FX3UC PLCs.
FX3UC Series PLC
Number of connectable units
• • • • • •
For a detailed description of
wiring, refer to Chapter 3.
• • • • • •
To check the connectable PLC
model number, refer to
Section 1.3.
Point and section to be
referred to
System
• • • • • •
• • • • • • • • •
Buffer memory
BFM#0
BFM#6999
• • • • • •
For a detailed description of
analog data reading programs,
refer to Chapter 4, 6, and 7.
For a detailed description of
the buffer memory, refer to
Section 5.3, and Section 5.4.
To use FROM/TO instruction
or to directly specify the BFM,
refer to Section 5.2.
Flowmeter, pressure sensor, etc.
Analog data
Refer to the system configuration shown in the FX
3G
/FX
3U
/FX
3UC
User's Manual - Hardware Edition to check the
number of connectable units and to configure the entire system.
Transmission direction
Program
• FROM(FNC 78)
• TO(FNC 79)
• BFM direct
specification(U\G)
*2
Up to 8 units
*1
connect to the FX
3G
/FX
3U
/FX
3UC
Series PLC
(including other types of special function blocks)
• • •
• • • • • •
• • • • • •
FX
3G
/FX
3U
Series PLC