Examples of causes
Fault
Possible causes
Initial diagnostics
CPU fault
● Fault due to internal error
● Fault due to external error
CPU diagnostics
CP fault
● Fault due to internal error
● Fault due to external error
Module Diagnostics > Special Diag‐
nostics > NCM S7 Diagnostics CP...
>
Information from:
● Module" folder
● Operating mode" folder
● Diagnostic buffer" folder
I/O module fault
● Fault due to SIMATIC station
component
● Fault due to external influences
(such as a short circuit on the
module terminals)
Module diagnostics > Status infor‐
mation
and, if available, diagnostics infor‐
mation
PC component fault
If the PC is running:
● Fault due to events
● Faulty connections
If the PC is defective:
● Repair/replace
● Restore data
7.2
Preparing for expert support
7.2.1
Compilations of information about the cause of the fault
Introduction
Topic area
Information
Supporting
service experts
● WHAT?: Actions for making essential information available to experts for fault
analysis.
● WHEN?: If expert support is needed in the event of a fault, you can facilitate the
work of the experts by providing them essential information on the plant or the
faulty components.
● HOW?: You can find information about handling this in this section.
Fault - What should I do?
7.2 Preparing for expert support
Service Support and Diagnostics (V8.2)
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