Special functions of the CPU 410-5H
9.7 Reading service data
CPU 410-5H Process Automation
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System Manual, 09/2014, A5E31622160-AB
9.7
Reading service data
Application case
If you need to contact Customer Support due to a service event, the department may require
specific diagnostic information on the CPU status of your system. This information is stored
in the diagnostic buffer and in the service data.
Select the "PLC -> Save service data" command to read this information and save the data
to two files. You can then send these to Customer Support.
Note the following:
●
If possible, read out the service data immediately after the CPU goes into STOP or
immediately after the synchronization of a fault-tolerant system has been lost.
●
Always read out the service data of both CPUs in a fault-tolerant system.
Procedure
1.
Select the "PLC > Save service data" command.
In the dialog box that opens up, select the file path and the file names.
2.
Save the files.
3.
Forward these files to Customer Support on request.
9.8
Response to fault detection
Response to fault detection
In order to ensure a high level of reliability, in particular, of the fault tolerant system, the CPU
410 has many self diagnostics. Faults can thus be detected and eliminated at an early stage.
In the rare instance that a fault occurs that cannot be eliminated by the firmware, the current
service data is saved internally for further evaluation by SIEMENS specialists. An automatic
reboot is then started. This behavior reduces the downtime of the CPU to a minimum.
Access to the process is restored as soon as possible.
Automatic reboot in the event of a one-sided defect in the fault-tolerant system
The defective CPU performs the complete self-test. The other CPU remains in RUN. If a
hardware error is detected, the CPU remains in DEFECTIVE. If no fault is detected, the CPU
links up again. The fault-tolerant system switches back to the redundant system state.
Use the "Save service data" function to immediately save the required defect information
during operation.