7.2.4 CPU fault - preparing diagnostics
Introduction
The following information is important for analyzing a CPU fault:
● Information on the affected CPU
● Information or actions in the event of a fault
WARNING
Rules
Note the following:
● Only trained service employees should be authorized to work on the process control
system.
● Always observe the plant-specific rules and government regulations when making
changes to a system.
● Observe the plant-specific boundary conditions and adjust the work accordingly.
● Always bear in mind that changes in a system can impact other sections of the system.
Information on the affected CPU
The following information is needed when a CPU fault occurs:
● Order number
● Firmware version
● Hardware version
If you can access the CPU from the engineering station, you can query this information via the
module information. You can find information about this in the section "Module Information
(Page 131)".
Note
A constantly updated list of all module information facilitates troubleshooting in the event of a
fault and reduces the time needed for correcting the fault.
Information in the event of a fault
The following information is needed if a fault occurs:
● Operations and actions/event history leading to the fault
● Status indicated by LED displays on the front of the CPU (such as RUN)
Only the RUN LED is lit
The SIMATIC station is functioning without errors.
Fault - What should I do?
7.2 Preparing for expert support
Service Support and Diagnostics (V8.2)
Service Manual, 03/2016, A5E36200111-AA 83
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