Siemens S7-1200 - Page 319

Extended instructions
8.3 Distributed I/O (PROFINET, PROFIBUS, or AS-i)
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
319
Parameter and type
Data type
Description
ID OUT HW_IO (Word) Hardware identifier of the I/O module that caused the diagnostic
interrupt
Note
: Refer to the F_ID parameter for an explanation of how to
determine the device ID.
LEN OUT DWord, UInt, UDInt,
DInt, Real, LReal
Length of the received AINFO interrupt information
TINFO IN_OUT Variant Task information: Target range for OB start and management
information. The TINFO length is always 32 bytes.
AINFO IN_OUT Variant Interrupt information: Target area for header information and additional
interrupt information. For AINFO, provide a length of at least the MLEN
bytes, if MLEN is greater than 0. The AINFO length is variable.
Note
If you call "RALRM" in an OB whose start event is not an I/O interrupt, the instruction will
provide correspondingly reduced information in its outputs.
Make sure to use different instance DBs when you call "RALRM" in diff
erent OBs. If you
evaluate data resulting from a "RALRM" call outside of the associated interrupt OB, you
should use a separate instance DB per OB start event.
Note
The interface of the "RALRM" instruction is identical to the "RALRM" FB defined in
"PRO
FIBUS Guideline PROFIBUS Communication and Proxy Function Blocks according to
IEC 61131
-3".