System features
X20 system User's Manual 3.10
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2.11 Diagnostics
Outstanding diagnostic options are needed for errors to be found quickly. The X20 system offers several levels
of diagnostics:
•
Direct on the module using visual LED displays. Bus status, I/O status and channel states are displayed
in direct relationship to the channels or the function. The different states are displayed in different ways,
e.g. green for OK, red for error.
•
Via software in the cyclic data image. With the X20 system, status data does not result in an additional
communication load, which would result in considerable differences between theoretically possible bus
speeds and real requirements during operation. All necessary status data is always transferred cyclically,
with no exceptions.
•
Expanded diagnostic data in acyclic data traffic without loss in performance. If a problem occurs, detailed
diagnostic data can be requested from the application by the respective module using an asynchronous
channel. This does not result in additional communication load and cycle times remain unchanged.
Figure 11: Visual diagnostics directly on the module using LED indicators
