Interrupts - Siemens Simatic ET 200S Operating Instructions Manual

8.1.4.10

Interrupts

The information in this chapter applies to IM151-1 STANDARD (6ES7151-1AA04-0AB0 and
higher) and IM151-1 HIGH FEATURE.
Definition
The interrupt section of the slave diagnostics provides information on the interrupt type and
the cause that led to the triggering of the interrupt. The interrupt section comprises of a
maximum 48 bytes.
Position in the diagnostic frame
The interrupt section comes after the channel-specific diagnostics (only in DPV1 mode).
Example: If 3 channel-specific diagnostics are pending, then the interrupt section starts at
byte 44.
Data record
The diagnostic data of a module can be up to 44 bytes in length and is located in data
records 0 and 1:
• Data 0 contains 4 bytes of diagnostic data describing the current status of a
• Data record 1 contains the 4 bytes of diagnostic data that are also contained in data
You can read out DS0 and DS1 by means of SFC 59 "RD_REC".
Table of Contents
The contents of the interrupt function depend on the interrupt type:
• In the case of diagnostic interrupts, diagnostic data record 1 (up to 44 bytes) is sent as
• In the case of process interrupts, the interrupt status information is 4 bytes in length.
• For insert/remove interrupt, the length of the interrupt information is
Structure of interrupts
If the configuration was performed with
transferred to the appropriate organization blocks (OBs).
The interrupt section for the ET 200S is structured as follows:
ET 200S
Operating Instructions, 12/2005, A5E00515771-03
programmable logic controller. DS0 is part of the header information of OB 82 (local data
bytes 8 to 11).
record 0 and, in addition, up to 40 bytes of module-specific diagnostic data.
the interrupt status information (starting at byte x+4).
– 5 bytes for IM151-1 HIGH FEATURE (6ES7151-1BA00-0AB0)
– 0 bytes for IM151-1 STANDARD (6ES7151-1AA04-0AB0 or higher), and IM151-1
HIGH FEATURE (6ES7151-1BA01-0AB0 or higher)
8.1 Alarm, error and system messages on PROFIBUS DP
STEP 7
, the interrupt data are evaluated and
Alarm, error and system messages
8-43