![Siemens Simatic S7-300 Installation And Operating Manual Download Page 274](http://html.mh-extra.com/html/siemens/simatic-s7-300/simatic-s7-300_installation-and-operating-manual_374640274.webp)
Analog modules
9.3 SM 336; F-AI 6 x 0/4 ... 20 mA HART
Fail-safe signal modules
274
Installation and Operating Manual, 01/2010, A5E00085586-10
"Tolerance window %, absolute" parameter
You can calculate the absolute tolerance window using the following formula:
7
DEV
ෙ,
DEV
,
0(
,
0$
>@
Calculate the maximum deviation of the current using the following formula:
,
0(
,
0$
7
DEV
ෙ,
DEV
s
>P$@
With
●
I
ME
= 20 mA
●
I
MA
= 0 mA for measuring range 0 ... 20 mA
●
I
MA
= 4 mA for measuring range 4 ... 20 mA
●
T = Tolerance, in %
●
ΔI
abs
= Maximum deviation of current (+/-)
You can assign a value of 0.2 to 20% for the "Tolerance window %, absolute" parameter for
each channel pair.
W
,>P$@
W
,>P$@
3URFHVVGDWD
'HYLDWLRQLQRIQRPLQDOUDQJHFDQ
EHVHWIURPsWR
3URFHVVGDWD
'HYLDWLRQLQRIQRPLQDOUDQJH
FDQEHVHWIURPsWR
5DQJHEHWZHHQGDVKHG
OLQHVLVWKHWROHUDQFH
ZLQGRZRIDSURFHVVYDOXH
5DQJHEHWZHHQGDVKHG
OLQHVLVWKHWROHUDQFH
ZLQGRZRIDSURFHVVYDOXH
Figure 9-41 Absolute deviation in % of the nominal range for measuring range 0 to 20 mA or 4 to 20 mA