Omron CP1H-CPU - 05-2006, Operation Manual

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Analog Input Units
Section 7-2
Procedure
Writing Set Data and
Reading A/D
Conversion Values
Connect the Analog Input Unit to the CPU Unit.
Connect and wire Units.
Create a ladder program
• Connect Analog Input Units.
• Wire to analog output devices.
• Write set data to output words (n+1, n+2).
• Set use of inputs.
• Select input signals using range codes.
• Set use of averaging.
• Read A/D conversion values from input words
(m+1 to m+4).
• For current inputs, confirm that there is no open
circuit.
CPU Unit
MOV
Set data (inputs 1, 2)
Set data (inputs 3, 4)
Analog input 3 conversion value
Analog input 4 conversion value
Analog Input Unit
Ladder program
Analog input 1 conversion value
Analog input 2 conversion value
Analog devices
Temperature sensor
Pressure sensor
Speed sensor
Flow sensor
Voltage/current meter
Other devices
Writes the set data (use
of inputs, averaging,
range codes).
Reads the conversion
value.
The last input word allocated to the
CPU Unit or already connected
Expansion (I/O) Unit is m and the
last output word is n.
(n+1) CH
(n+2) CH
(m+1) CH
(m+2) CH
(m+3) CH
(m+4) CH
1. Connecting the Analog Input Unit
CPU Unit
Analog Input Unit
CPM1A-AD041
CH
I IN1 I IN3
I IN2 VIN1
VIN2
VIN3 COM1
COM2
I IN4
VIN4 COM4
COM3
IN
NC
AG