Mitsubishi Electronics MELSEC-F Manuel D’Utilisation
C-24
4 Programming
4.8 Basic Program Example
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX
3U
-4AD-ADP (4-channel analog Input)
4.8
Basic Program Example
Create the following basic program example to read out analog conversion (A/D conversion) data.
• For FX
• For FX
3G
, FX
3U
, FX
3UC
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.
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.
in the timer/counter setting value or in a PID instruction.
*1.
"1st" for the FX
3G
PLC.
M8001
M8280
M8000
M8000
M8281
Sets the input mode of channel
1 to the voltage input mode
(0 V to 10 V).
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).
2 to the current input mode
(4 mA to 20 mA).
M8002
Initial
pulse
pulse
RST
M6
RST
M7
Error status: b6 = OFF
Error status: b7 = OFF
M8000
FNC 12
MOV
K5
D8284
FNC 12
MOV
K5
D8285
Sets the averaging time to "5"
for channel-1 data.
for channel-1 data.
Sets the averaging time to "5"
for channel-2 data.
for channel-2 data.
M8000
FNC 12
MOV
D8280
D100
FNC 12
MOV
D8281
D101
Stores the A/D converted
channel-1 digital data into D100.
channel-1 digital data into D100.
Stores the A/D converted
channel-2 digital data into D101.
channel-2 digital data into D101.
MOV
D8288
K4M0
MOV
D8288
K4M0