Siemens SIMATIC ET 200AL System Manual page 330

Interrupts, error messages, diagnostics and system alarms
5.3 Alarms
5.3.3 Channel diagnostics
Function
Channel-related diagnostics provides information about channel faults in modules.
Channel faults are mapped as channel diagnostics data in IO diagnostics data records.
The data record is read with the "RDREC" instruction (SFB 52).
Structure of the diagnostics data records
The data records supported by the ET 200AL distributed I/O system are based on the
PROFINET IO standard - Application Layer Service definition V2.2.
You can download the standard on the Internet (http://www.profibus.com) from home page
of the PROFIBUS user organization free of charge.
Structure of the manufacturer-specific diagnostics data records
The structure of the diagnostics data records is differentiated by the BlockVersion. The
following BlockVersion applies to the IM 157-1 PN interface modules:
Table 5- 6
IM 157-1 PN interface module
6ES7157-1AB00-0AB0
5.3.4 Invalid configuration states of ET 200AL on the PROFINET IO
Invalid configuration states
If the number of modules exceeds the maximum configuration limit, the extra modules are
ignored by the system. No data exchange takes place.
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Structure of the manufacturer-specific diagnostics data records
BlockVersion
W#16#0101
IM 157-1 PN (6ES7157-1AB00-0AB0)
Equipment Manual, 05/2021, A5E32347036-AE