Detection Of Messages Using The Microscale Library - Siemens SIWAREX MS Device Manual

Messages and Diagnosis
problems in the system. After switching the power supply for the SIMATIC CPU off,
the contents of the message buffer are lost.

7.4 Detection of Messages Using the MicroScale Library

All of the messages of the SIWAREX expansion module can be detected and
processed in the controller with the MicroScale library.
Errors can be detected in library work with an output variable Lib_error_bits.
The operating errors and operation and data errors are indicated in the parameter
defined variable memory (see chapter 8 Programming in STEP 7.)
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