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Deployment I/O periphery
Analog input > Analog value representation
5.3.2 Analog value representation
Number representation in
Siemens S7 format
Resolution
Bit number
15
14
Value
SG
14
2
11Bit+sign
SG
Sign bit (SG)
Behavior at error
Voltage measurement
0 ... 10V
Measuring range
Voltage
(U)
0 ... 10V
> 11.759V
11.759V
10V
5V
0V
-0.8V
< -0.8V
92
High byte (byte 0)
13
12
11
10
13
12
11
10
2
2
2
2
Measuring value
Here it is essential:
Bit 15 = "0": à positive value
n
n
Bit 15 = "1": à negative value
As soon as a measured value exceeds the overdrive region respectively falls below the
underdrive region, the following value is issued:
n
Measuring value > end of overdrive region:
32767 (7FFFh)
n
Measuring value < end of underdrive region:
-32768 (8000h)
At a parameterization error the value 32767 (7FFFh) is issued.
When leaving the defined range during analog output 0V respectively 0A is issued.
Decimal
(D)
32767
32511
27648
13824
0
-2212
-32768
Analog value - twos complement
9
8
7
6
9
8
7
6
2
2
2
2
* The lowest value irrelevant bits of the output value (0) are marked with "X".
Hex
Range
7FFFh
overflow
7EFFh
overdrive range
6C00h
nominal range
3600h
0000h
F75Ch
underdrive range
8000h
underflow
VIPA System SLIO
Low byte (byte 1)
5
4
3
2
5
4
3
2
2
2
2
2
X*
X*
Formulas
D: decimal value
U: voltage value
HB300 | CPU | 013-CCF0R00 | en | 16-40
1
0
1
0
2
2
X*
X*
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