
Principles of analog modules
5.1 Representation of the values for analog input channels
S7-300 Module data
Manual, 02/2013, A5E00105505-08
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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)
Units Analog value
dec hex high byte low byte
8 128 80
H
Sign 0 0 0 0 0 0 0 1 x x x x x x x
9 64 40
H
Sign 0 0 0 0 0 0 0 0 1 x x x x x x
10 32 20
H
Sign 0 0 0 0 0 0 0 0 0 1 x x x x x
11 16 10
H
Sign 0 0 0 0 0 0 0 0 0 0 1 x x x x
12 8 8
H
Sign 0 0 0 0 0 0 0 0 0 0 0 1 x x x
13 4 4
H
Sign 0 0 0 0 0 0 0 0 0 0 0 0 1 x x
14 2 2
H
Sign 0 0 0 0 0 0 0 0 0 0 0 0 0 1 x
15 1 1
H
Sign 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
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