Phoenix Contact 2701027 NLC-050-024D-06I-04QTP-00A nanoLine Base Unit 24ßV/DC / PNP 2701027 Data Sheet
Product codes
2701027
Getting Started and Tutorial
2373_en_B
PHOENIX CONTACT
2-23
The Diagnostic flow chart shown in Figure 2-17 illustrates general layout and ideas
generally needed in diagnosing faults. It doesn’t account for the specific needs of all
projects. Depending on project needs, including applicable safety regulations and
considerations, it’s possible to write diagnostic flow charts to look for one or more errors for
a given action (the example shows checking for three possible errors for any given action).
Therefore, the size and layout of a specific project diagnostic flow chart will vary from this
one. However, the functionality should be very close.
2.5.4
Recovery Flow Chart
The job of a recovery flow chart (see Figure 2-18) is to put all outputs (such as a window
controls and valves) back to a safe position and/or state after a fault occurs.
Figure 2-18
Sample recovery flow chart
Wait for recovery
condition(s)
Decision blocks check
to see if a state exists
that requires recovery
If recovery required,
set output states
If no recovery required,
perform other actions
as required.