Diagnostics: Wire Break; Smoothing - Siemens SIMATIC ET 200SP F-AI 4xI 0(4) 20mA 2-/4-wire HF Series Manual

4.3.2.11

Diagnostics: Wire break

Function
Here you activate wire break detection for a configured measuring range of 4 to 20 mA.
With an assigned measuring range of 4 to 20 mA:
● With assigned wire break diagnostics and currents < 3.6 mA, a wire break is detected and
a diagnostic interrupt is triggered in the F-CPU.
● Without configured wire break and currents diagnostics < 0.4444 mA detects "underflow"
and triggers a diagnostic interrupt in the F-CPU.
With an assigned measuring range of 0 to 20 mA, the wire break diagnostics is permanently
set by default. With currents < 0.4442 mA, a wire break is detected and a diagnostic interrupt
is triggered in the F-CPU.
If you do not need a channel, deactivate the channel. Then, a wire break is not detected.
4.3.2.12

Smoothing

Using smoothing
Smoothing of analog values provides a stabilized analog signal for further processing.
Smoothed values are always used for discrepancy analysis.
The smoothing takes place as a result of averaging over the selected number of most
recently converted analog values of a channel, e.g. 64.
The mean value generation causes a discrepancy to be delayed with a configured "1oo2
evaluation (max. SIL3/Cat.4/PLe)". You can find an example below.
Analog input module F-AI 4xI 0(4)..20mA 2-/4-wire HF (6ES7136-6AA00-0CA1)
Manual, 08/2018, A5E41448857-AB
WARNING
Parameters/address space
4.3 Explanation of parameters
35