FX Series Programmable Controllers Assigning System Devices 9
9-11
9.3.2 FX1N-2AD-BD
This expansion board is used to convert up to two channels of analog input into digital values
for use by the FX1S/1N Series PLCs. Voltage input (0 ~ 10 Volts) or Current input (4 to 20 mA)
for analog to digital conversion can be set by switching the auxiliary relays assigned to each
channel. The output values can be adjusted after the conversion via PLC program code but
resolution cannot be improved.
Basic Program #1
The following program sets Channel 1 in the Voltage Input mode and Channel 2 in the Current
Input mode with the A/D converted digital value of each channel stored in D0 and D2
respectively.
Basic Program #2
Ch1 is set to Current input, Ch2 is set to Voltage input, and the average converted digital value
over a set time period is stored in D10 and D14.
M8001
M8000
M8000
FNC 12
MOV
D8112 D0
FNC 12
MOV
D8113 D2
M8112
M8113
Ch1 is set for the voltage input (0 to 10V).
Ch2 is set for the current input (4 to 20mA).
The digital value gained through AD conversion of Ch1 is stored at D0.
The digital value gained through AD conversion of Ch2 is stored at D2.
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