Useful Information On Error Diagnostics - Siemens SIMATIC PCS 7 System Manual

Diagnostics guide

10.2 Useful information on error diagnostics

10.2 Useful information on error diagnostics
AS function blocks
All APF AS function blocks have error outputs for precise diagnostics. Many blocks also have
an output that provides error codes for more detailed analysis. You can find more detailed
information in the block descriptions or the online help for the relevant AS function block.
Log files
Various log files are available to help you diagnose problems using APF.
Engineering tool
The engineering tool log files can be accessed at <Program Files path>\SIEMENS\WINCC
\diagnose\APF_Engineering_##.txt.
Integrator
The APF Integrator log file can be accessed at <Program Files Path>\SIEMENS\WINCC
\diagnose\logfile_integrator.txt
Runtime data
There are two versions of log files for runtime processes. Both files are located in the standard
WinCC diagnostics directory (<WinCC installation directory>\Diagnostics) on each computer.
● APF_OS_Diag.log: This log file contains all errors which have occurred during write or read
access to the user archive and which only affect the OS. This file is stored on each OS
computer (OS client and OS server).
● APF_OS_AS_Diag.log: This log file contains all errors which have occurred during AS / OS
communication with FB_UA_RM or FB_UA_WM. This log file is therefore only available on
the OS server (or on both OS servers of a redundant OS server pair).
The log files differ from computer to computer and are not synchronized. This enables more
exact error diagnostics and also helps to establish the computer on which the error was caused.
Downloading the OS project to the computer does not overwrite the log files. They therefore
remain on the relevant computers for the duration of a project.
Outputs in the C console
The OS section of the APF is based on C functions that provide useful information for
diagnostics in the C output window (apdiag). But because this type of troubleshooting is
extremely complex, you should only use it if you are unable to find the source of the error by
other means.
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Advanced Process Functions Engineering Manual
System Manual, 07/2016, A5E38719921-AA