B-3
1 Outline
1.1 Outline of Functions
A
Common Items
B
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3U
-4DA-ADP
E
FX
3U
-4AD-PT
-ADP
F
FX
3U
-4AD-TC
-ADP
G
PID Instruction
(FNC 88)
FX
3U
/FX
3UC
Series PLC User's Manual - Analog Control Edition
FX3UC-4AD (4-channel Analog Input)
1. Outline
This chapter describes the outline of FX3UC-4AD.
1.1 Outline of Functions
FX3UC-4AD (referred to as 4AD) is an analog special function block. Connect FX3UC-4AD to the FX3UC Series
PLC to load the voltage/current data of 4 channels.
1) Up to 7 4AD analog special function blocks can be connected to the FX
3UC 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 buffer memory (BFM) incorporated in 4AD.
4) Set the digital filter to stably read out the A/D conversion values.
5) For each channel, up to 1,700 A/D conversion values can be stored as the history data.
FX
3UC
Series PLC
Number of connectable units
• • • • • •
For a detailed description of
wiring, refer to Chapter 3.
• • • • • •
To check the model number of
the connectable PLC, 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
3UC
User's Manual - Hardware Edition to check the number of
connectable units and to determine the entire system.
Transmission direction
Program
•
FROM(FNC 78)
•
TO(FNC 79)
•
BFM direct
specification(U
\G
)
7 blocks, maximum
(including other types of special function blocks)
• • •
• • • • • •
• • • • • •
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