Siemens SIMATIC ET 200X, Manual

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Commissioning and Diagnostics
5-43
ET 200X Distributed I/O Device
EWA 4NEB 780601602-06
5.6.9 Interrupts
Definition
The interrupts section of the slave diagnosis provides information on the type of
interrupt and the cause that triggered the interrupt.
The interrupt section has a maximum of 20 bytes.
A maximum of one interrupt can be used per slave diagnosis.
Position in the diagnostic frame
The position of the interrupt section in the slave diagnosis depends on the
structure of the diagnostic frame and on the number of channel-specific diagnoses
(see also Figure 5-8):
No enhanced diagnosis: always as of byte 9 after the module diagnosis
Enhanced diagnosis: after the channel-specific diagnoses.
For example: if there are 3 channel-specific diagnoses, the interrupt section
begins as of byte 25.
More than one interrupt
Interrupt information in the slave diagnosis is overwritten by the interrupt
information of the next interrupt to be triggered.
Contents
The contents of the interrupt information depend on the type of interrupt:
In the case of diagnostic interrupts, the diagnostic data record 1 for SIMATIC S7
(16 bytes) is sent as interrupt information (as of byte x+4). You can find out what
these bytes mean for digital and analog modules in Figures 5-14 to 5-17.
In the case of hardware interrupts, the additional interrupt information is 4 bytes
long. You can find out what these bytes mean in Figure 5-18.