
Troubleshooting
9-17
SIMATIC 545/555/575 System Manual
9.5 Troubleshooting by Using Status Words
In addition to auxiliary functions, the CPU provides operational information
in the form of 16-bit status words. Status words can be read with your
programming device. Status words can also be used within an RLL
program, thus allowing the system to execute diagnostics during run-time
conditions.
All status words that are supported by the CPU are described in detail in
the SIMATIC
545/555/575 Programming Reference User Manual.
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