Contec CONPROSYS nano CPSN-PCB271-S1-041, Справочное руководство, Страница: 70 / 155

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Basic Programming
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CPSN-PCB271-S1-041 Reference Manual (Software)
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CPSN-AI-1208LI
I/O Mapping Name Notation on CODESYS Size Number Access Remarks
Analog input data ai 0-7 16bit 8 R
Higher 4 bits: 0 fixed
Lower 12 bits:
Measurement data *1
Analog input data
(Industrial value)
ai 0-7
(industrial value)
32bit 8 R
*2
*1 The measurement data are returned in an integer value 0 - 4095.
When converting the measurement data into voltage or current values, use the following conversion
formula.
Conversion formula:
Input voltage (V) = Measurement data x Span / 2 12 - Off-set
Input current (mA) = Measurement data x Span / 2
12
- Off-set
Analog input range Span Off-set
±10V 20 10
±5V 10 5
±2.5V 5 2.5
0-10V 10 0
±20mA 40 20
The table below is the conversion example when analog input range is set to "±10V".
Input voltage (V) Analog input data(h)
+9.995117 0FFF
: :
+0.004883 0801
+0.000000 0800
-0.004883 07FF
: :
-10.000000 0000
*2 The voltage value (V) or current value (mA) is returned in single-precision floating- point number type.
For example, if the input voltage is 1.5V, "1.5" will be set.
This is supported when using firmware Ver1.30, and with definition information Ver1.1.0.0 or later versions
for the CPSN-AI-1208LI
When the firmware is Ver1.20 or earlier versions, use the Ver1.0.0.0 definition information.