Interrupts - Siemens ET 200pro Operating Instructions Manual

Alarm, error and system messages
9.1 PROFIBUS DP
9.1.13

Interrupts

9.1.13.1 Interrupts
Definition
The interrupt section of the slave diagnosis provides information on the type of interrupt and
the cause that led to the triggering of the interrupt. The interrupt section comprises a
maximum of 48 byte.
Position in the diagnostics frame
The position of the interrupt section comes after the channel-specific diagnostic data or after
the identifier-related diagnostic data (STEP 7).
Example: If there are 3 channel-specific diagnostics, the interrupt section starts at byte 28.
In the case of an interrupt, the channel-specific diagnostic data is reduced in favor of the
interrupt information.
Data records
The diagnostics data of a module can be up to 44 byte in length and is located in data
records 0 and 1:
● Data record 0 contains 4 byte of diagnostic data describing the current state of an
automation system. DS0 is part of the header information of OB 82 (local data bytes 8 to
11).
● Data record 1 contains the 4 byte of diagnostics data that are also contained in data
record 0 and, in addition, up to 40 byte of module-specific diagnostics data.
You can read out DS0 and DS1 via SFB 52. DS0 and DS1 are not generated by the
interface module.
Contents
The contents of the interrupt function depend on the type of interrupt:
● In the case of diagnostic interrupts, diagnostic data record 1 (44 byte) is sent as interrupt
status information (starting at byte x+4).
● The interrupt status information for hardware interrupts is 4 byte in length.
● In the case of swapping interrupts, the interrupt information is 5 byte long.
See also
Structure of interrupts (Page 209)
208
ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08