Error and system messages
4.4 Diagnostics with STEP 7
IM151-1 FO STANDARD interface module (6ES7151-1AB05-0AB0)
Manual, 02/2010, A5E01075965-03
47
Note
The module slot coding is contained in byte 35, bits 0 to 5. The following applies: Displayed
1 ≙ Slot of the module (0 ≙ Slot 1; 1 ≙ Slot 2; 3 ≙ Slot 4, etc.)
In bits 6/7 of byte 36, 00
B
is output if a power module reports channel-specific diagnostics.
4.4.8
Interrupts
Definition
The interrupt section of the slave diagnostics indicates the interrupt type and the event that
led to an interrupt being triggered. The interrupt part consists of a maximum of 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 records
The diagnostic data of a module can be up to 44 bytes in length and is located in data
records 0 and 1:
●
Data record 0 contains 4 bytes of diagnostic data describing the current status 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 bytes of diagnostic data that is also contained in data record
0 and, in addition, up to 40 bytes of module-specific diagnostic data.
DS0 and DS1 can be read out with SFC 59 "RD_REC."
Contents
The contents of the interrupt information depend on the interrupt type:
●
In the case of diagnostic interrupts, diagnostic data record 1 (up to 44 bytes) is sent as
the interrupt status information (starting from byte x+4).
●
The status information for process interrupts is 4 bytes in length.
●
In the case of insert/remove module interrupts, the interrupt status information is 0 bytes
long.
