Basic Program Example - Mitsubishi Electric MELSEC-FX3S Series Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U
FX -4AD-ADP (4-channel Analog Input)
3U
4.8

Basic Program Example

Create the following basic program example to read out analog conversion (A/D conversion) data.
• For FX /FX
3S
The following program will set channel 1 of the 3rd
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.
M8001
Normally
OFF
M8000
Normally
ON
M8000
Normally
ON
M8002
Initial
pulse
M8000
Normally
ON
M8000
Normally
ON
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
C-26
PLC User's Manual - Analog Control Edition
3UC
/FX /FX /FX Series PLC
3G 3GC 3U 3UC
M8280
M8281
FNC 12
D8288 K4M0
MOV
RST M6
RST M7
FNC 12
K4M0 D8288
MOV
FNC 12
K5 D8284
MOV
FNC 12
K5 D8285
MOV
FNC 12
D8280 D100
MOV
FNC 12
D8281 D101
MOV
/FX /FX
3S 3G 3GC
*1
adapter to voltage input mode and channel 2 to
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).
Error status: b6 = OFF
Error status: b7 = OFF
Sets the averaging time to "5"
for channel-1 data.
Sets the averaging time to "5"
for channel-2 data.
Stores the A/D converted
channel-1 digital data into D100.
Stores the A/D converted
channel-2 digital data into D101.
PLC.
4 Programming
4.8 Basic Program Example