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
Diagnostics > 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
information and, if available,
diagnostic information
PC
component
fault
If the PC is running:
● Fault due to events
● Faulty connections
If the PC is defective:
● Repair/replace
● Restore data
6.2 Preparing for expert support
6.2.1 Information on cause of 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 facilitate the work
of the experts by providing them essential information on the plant or the faulty
components.
● HOW?: You can find information on this in this section.
Failure - What next?
6.2 Preparing for expert support
Service support and diagnostics (V8.0)
64 Service Manual, 03/2012, A5E02779775-02
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