C-26
4 Programming
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX3U-4AD-ADP (4-channel Analog Input)
4.8 Basic Program Example
4.8 Basic Program Example
Create the following basic program example to read out analog conversion (A/D conversion) data.
•For FX
3S/FX3G/FX3GC/FX3U/FX3UC Series PLC
The following program will set channel 1 of the 3rd
*1
adapter to voltage input mode and channel 2 to
current input mode, and will store the converted A/D value of channel-1 data into D100 and that of channel-
2 data into D101.
Even if the input data is not stored into D100 or D101, the data registers D8280 or D8281 can be directly
used in the timer/counter setting value or in a PID instruction.
*1. "1st" for the FX
3S/FX3G/FX3GC PLC.
M8001
M8280
M8000
M8000
M8281
Sets the input mode of channel
1 to the voltage input mode
(0 V to 10 V).
Sets the input mode of channel
2 to the current input mode
(4 mA to 20 mA).
M8002
Initial
pulse
Normally
OFF
Normally
ON
Normally
ON
Normally
ON
Normally
ON
RST
M6
RST M7
Error status: b6 = OFF
Error status: b7 = OFF
M8000
K5 D8284
K5 D8285
Sets the averaging time to "5"
for channel-1 data.
Sets the averaging time to "5"
for channel-2 data.
M8000
D8280 D100
D8281 D101
Stores the A/D converted
channel-1 digital data into D100.
Stores the A/D converted
channel-2 digital data into D101.
D8288 K4M0
D8288K4M0
FNC 12
MOV
FNC 12
MOV
FNC 12
MOV
FNC 12
MOV
FNC 12
MOV
FNC 12
MOV
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