Siemens SIMATIC ET 200AL, System Manual

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Interrupts, error messages, diagnostics and system alarms
5.2 Interrupts
IM 157-1 DP (6ES7157-1AA00-0AB0)
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Equipment Manual, 08/2021, A5E32100641-AE
5.2.4 Triggering an insert/remove module interrupt
When an insert/remove module interrupt occurs, the CPU interrupts execution of the user
program and processes the insert/remove module interrupt OB (OB 83). The event that
triggered the interrupt is entered in the start information of the insert/remove OB.
The pull/plug OB (OB 83) is also triggered for all subsequent I/O modules, because the
ET-Connection and/or the power supply is interrupted.
5.2.5 Structure of data records
Definition
The interrupt section of the slave diagnostics indicates the interrupt type and the event that
led to an interrupt being triggered. The interrupt section comprises 62 bytes including an
interrupt header.
Position in the diagnostics frame
The interrupt section is located after the channel diagnostics.
Data records
The diagnostics data of a module are located in the data records 0 and 1:
•
Data record 0 contains 4 bytes of diagnostics data that describe the current status of the
distributed I/O system. Data record 0 is part of the header information of the OB 82 (local
data bytes 8 to 11).
• Data record 1 contains 4 bytes of diagnostics data that are also available in data record 0.
The figure below shows the structure of data record 0.
Figure 5-2 Structure of data record 0