Siemens SIMATIC ET 200SP F-AI 4xI 0(4) 20mA 2-/4-wire HF Series - Page 30

Parameters/address space
4.3 Explanation of parameters
Analog input module F-AI 4xI 0(4)..20mA 2-/4-wire HF (6ES7136-6AA00-0CA1)
30 Manual, 08/2018, A5E41448857-AB
"Tolerance window %, absolute" parameter
You can calculate the absolute tolerance window using the following formula:
Calculate the maximum deviation of the current using the following formula:
With
● I
ME
= 20 mA (full-scale value)
● I
MA
= 0 mA for measuring range 0 ... 20 mA (start-of-scale value)
● I
MA
= 4 mA for measuring range 4 ... 20 mA (start-of-scale value)
● T
abs
= Tolerance in %
● ΔI
abs
= Maximum deviation of current (+/-)
You can assign a value of 2.0 to 20.0% for the "Tolerance window %, absolute" parameter
for each channel pair.
Figure 4-3 Absolute deviation in % of the nominal range for measuring range 0 to 20 mA or 4 to 20 mA