Representation Of The Values For Analog Input Channels - Siemens SIMATIC Manual

Principles of analog modules

5.1 Representation of the values for analog input channels

5.1 Representation of the values for analog input channels
Measured value resolution
The resolution of the analog values may differ, based on the analog module and module
parameters. At resolutions < 15 bits, all bits identified by "x" are set to "0".
Note
This resolution does not apply to temperature values. Converted temperature values are the
result of a conversion in the analog module.
Table 5- 2 Supported analog value resolutions
Resolution
in bits (+ sign)
8
9
10
11
12
13
14
15
Binary representation of input ranges
Table 5- 3 Bipolar input ranges
Units Measured
value in %
32767 >118.515
32511 117.589
27649 >100.004
27648 100.000
1 0.003617
0 0.000
-1 -0.003617
-27648 -100.000
≤-100.004
-27649
-32512 -117.593
≤-117.596
-32768
262
Units
dec hex
128 80
H
64 40
H
32 20
H
16 10
H
8 8
H
4 4
H
2 2
H
1 1
H
Data word
15 14 13 12
2 2 2 2
0 1 1 1
0 1 1 1
0 1 1 0
0 1 1 0
0 0 0 0
0 0 0 0
1 1 1 1
1 0 0 1
1 0 0 1
1 0 0 0
1 0 0 0
Analog value
high byte
Sign 0 0 0 0 0 0 0
Sign 0 0 0 0 0 0 0
Sign 0 0 0 0 0 0 0
Sign 0 0 0 0 0 0 0
Sign 0 0 0 0 0 0 0
Sign 0 0 0 0 0 0 0
Sign 0 0 0 0 0 0 0
Sign 0 0 0 0 0 0 0
11 10 9 8 7
2 2 2 2 2 2
1 1 1 1 1 1
1 1 1 0 1 1
1 1 0 0 0 0
1 1 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
1 1 1 1 1 1
0 1 0 0 0 0
0 0 1 1 1 1
0 0 0 1 0 0
0 0 0 0 0 0
low byte
1 x x x x x x x
0 1 x x x x x x
0 0 1 x x x x x
0 0 0 1 x x x x
0 0 0 0 1 x x x
0 0 0 0 0 1 x x
0 0 0 0 0 0 1 x
0 0 0 0 0 0 0 1
6 5 4 3 2 1
2 2 2 2 2
1 1 1 1 1
1 1 1 1 1
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
1 1 1 1 1
0 0 0 0 0
1 1 1 1 1
0 0 0 0 0
0 0 0 0 0
Manual, 06/2017, A5E00105505-AJ
Range
0
2
1 Overflow
1 Overshoot
range
1
0
1
Rated range
0
1
0
1 Undershoot
range
0
0 Underflow
S7-300 Module data