Omron CP1H CPU Operation Manual page 447

Analog I/O Units
Note
Reading A/D Conversion Tables
Data converted from analog to digital is output to bits 00 to 07 in words m+1
and m+2.
CPU Unit
Ladder program
MOVE instruction
MOV(21)
Writes the range
code. Reads the
conversion value.
"m" is the last input word and "n" is the last
output word allocated to the CPU Unit, or
previous Expansion Unit or Expansion I/O Unit.
15
m + 1
Analog input 1
Open-circuit
Detection Flag
0: Normal
1: Open-circuit
15
m + 2
Analog input 2
Open-circuit
Detection Flag
0: Normal
1: Open-circuit
The Open-circuit Detection Flag is turned ON if the input signal range is set to
1 to 5 V or 4 to 20 mA and the input signal falls below 1 V or 4 mA. (Open cir-
cuits are not detected when the input signal range is set to 0 to 10 V.)
Analog I/O Unit
Word n + 1
Word m + 1
Word m + 2
07 00
Analog input 1 conversion value (00 to FF hex)
07 00
Analog input 2 conversion value (00 to FF hex)
Section 7-4
Range code
Analog input 1
conversion value
Analog input 2
conversion value
Analog devices
· Temperature sensor
· Pressure sensor
· Speed sensor
· Flow sensor
· Voltage/current meter
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