Alarm, fault and system messages
11.4 I/O device diagnostics
SIMATIC MV420 / SIMATIC MV440
350 Operating Instructions, 04/2013, A5E02371045-06
Diagnostics data record SFB 52
Byte Value Meaning
0 ... 1 W#16#0010 Data record type: Diagnostics data record
2 ... 3 W#16#0012 Data record length starting at byte 4: 18 bytes
4 ... 5 W#16#0100 Version
6 ... 7 W#16#0000 Slot
8 ... 9 W#16#0000 Subslot
10 ... 11 W#16#0000 Channel
12 B#16#08 / B#16#10 Error occurred / no error occurred
13 B#16#05 Identifier indicating that all variables are stored in words starting at byte
14.
14 ... 15 W#16#0004 ID for vendor-specific diagnostics (fixed)
16 ... 17 W#16#0000 Channel number
18 ... 19 W#16#0805 / W#16#1005 Content identical to that of bytes 12 and 13.
20 ... 21 Value from the table under error
messages
ID of the error that occurred.
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