Siemens S7-300 Installation And Operating Manual page 276

Analog modules
9.3 SM 336; F-AI 6 x 0/4 ... 20 mA HART
Combination of the "Tolerance window %, absolute" and "Tolerance window %, relative" parameters
You can combine the "Tolerance window %, absolute" and "Tolerance window %, relative"
parameters as needed. The combined tolerance window (shown in gray in the figure below)
is the maximum of T
T = MAX { T
ΔI = MAX { ΔI
Where (in both formulas above):
● T = Tolerance, in %
● ΔI = Maximum deviation of current (+/-)
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and T .
rel abs
, T }
rel abs
, ΔI }
rel abs
Installation and Operating Manual, 01/2010, A5E00085586-10
Fail-safe signal modules