Siemens SIMATIC ET 200AL Equipment Manual - Page 27

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Interrupts, error messages, diagnostics and system alarms

5.2 Interrupts

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

IM 157-1 DP (6ES7157-1AA00-0AB0)

Equipment Manual, 08/2021, A5E32100641-AE