Example Of Data "Vz + 15 Bit - Festo CPX-E AI-U-I Series Translation Of The Original Instructions

Function
Signal range
1 ... 5 V
1)
5.7 V
>
5.7 V
5 V
>
1 5 V
...
1 V
<
0.3 V
0.3 V
<
1) 1 LSB (least significant bit) corresponds to 145 nA; resolution 15 bit
Tab. 12 Unipolar Signal Ranges (3)
2.2.3

Example of Data "VZ + 15 bit"

The following example shows the processing of the analogue input signals with the data format
"VZ + 15 bit", which means without scaling.
The example uses a pressure sensor that converts the physical measuring range from 0 ... 6 bar linear
to the signal ranges 0 ... 10 V, 0 ... 20 mA or 4 ... 20 mA.
1 Lower end value of the nominal range
2 Measured value (example)
3 Upper end value of the nominal range
4 Digital input value (example)
Fig. 4 Example of Data "VZ + 15 bit"
Festo — CPX-E-...AI-U-I — 2020-01a
Digital values
decimal hexadecimal
32767 7FFF
32511 7EFF
27648 6C00
> >
0 27648 0 6C00
... ...
1 FFFF
–
< <
4864 ED00
–
32768 8000
–
5 Digital range of values after A/D conversion
6 Allocated analogue signal
7 Physical measuring values
Range
Overflow
End of measuring range
Overdrive range
Nominal range
Underdrive range
End of measuring range
Underflow
11