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Example program 9
9-1
9. Example program
9.1 Program example for analog input/output
The section introduces an example program to manipulate analog input/output using the
FX
2N
-5A.
Condition
System configuration:
The FX
2N
-5A (unit No. 0) is connected as a special function block nearest to the FX
0N
/
FX
1N
/FX
2N
/FX
2NC
Series PLC
*1
main unit.
Input mode:
CH1 and CH2 : Mode 0 (voltage input, -10 to +10 V
→
-32000 to +32000)
CH3 and CH4 : Mode 1 (current input, 4 to 20 mA
→
0 to 32000)
Output mode:
Analog output channel: Mode 0 (voltage output, -32000 to +32000
→
-10 to +10 V)
Number of times of averaging:
10 in each input channel
I/O characteristics:
Standard I/O characteristics (initial value) in each channel
Convenient function:
Not used.
I/O assignment:
X000 : Change of analog output value.
X001 : Clears the scale over error.
Y000 to Y007 : Output scale over status of each channel.
Y010 to Y027 : Output of error status.
*1 FX
3U
/FX
3UC
Series PLC can use direct specification of buffer memory.
Refer to the FX
3G
/FX
3U
/FX
3GC
/FX
3UC
Series Programming Manual - Basic & Applied
Instruction Edition for details.
FX2N-5A Special function block