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Analogue value display
6
Analogue value display
The analogue values of the input signals are always represented with 15 bits plus sign
è Tab. 9 Analogue value display.
There are different resolutions depending on the signal range.
Bit
15
14
13
12
14
13
12
Sign 2
2
2
MSB
Tab. 9 Analogue value display
VZ = sign (0 = positive value, 1 = negative value)
MSB = most significant bit
LSB = least significant bit
6.1
Bipolar signal ranges
Voltage measuring range –10 V ... +10 V
Signal range
–10 V ... +10 V
1)
10.2 V
>
10 V
10.2 V
...
>
10 V
+10 V
–
...
10 V
10.2 V
–
...
–
<
10.2 V
–
<
1) 1 LSB (least significant bit) corresponds to 313 μV; resolution 16 bits
Tab. 10 Voltage measuring range –10 V... +10 V
Voltage measuring range –5 V ... +5 V
Signal range
–5 V ... +5 V
1)
5.1 V
>
5 V
5.1 V
...
>
5 V
+5 V
–
...
5 V
5.1 V
–
...
–
<
5.1 V
–
<
1) 1 LSB (least significant bit) corresponds to 156 μV; resolution 16 bits
Tab. 11 Voltage measuring range –5 V... +5 V
Festo — CPX-AP-I-4AI-U-I-RTD-M12 — 2020-03
11
10
9
8
11
10
9
8
2
2
2
2
Digital values
decimal
32640
>
32001
32640
...
32000
+32000
–
...
32001
32640
–
...
–
32640
–
<
Digital values
decimal
32640
>
32001
32640
...
32000
+32000
–
...
32001
32640
–
...
–
32640
–
<
7
6
5
4
7
6
5
4
2
2
2
2
hexadecimal
0x7F80
>
0x7D01
0x7F80
...
0x8300
0x7D00
...
0x82FF
0x807F
...
0x807F
<
hexadecimal
0x7F80
>
0x7D01
0x7F80
...
0x8300
0x7D00
...
0x82FF
0x807F
...
0x807F
<
3
2
1
0
3
2
1
0
2
2
2
2
LSB
Range
Overflow
Overdrive range
Nominal range
Underdrive range
Underflow
Range
Overflow
Overdrive range
Nominal range
Underdrive range
Underflow
13
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