Siemens SIMATIC FM 353 - Page 104

Programming the Technological Functions
6-24
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
Table 6-5 Diagnostic information, continued
Data
Format
DescriptionUser DBMessage
10 x
bt
When the
POS DIAG bl k i
DBB74 FM pos. ID (74H)
byte POS_DIAG block is
called
,
the informa-
DBB75 Length of the diagnostic information (16)
called
,
the informa
-
tion (incl. bytes 0 to
3) is read and en
DBB76 Number of channels (1)
3) is read and en-
tered in the AW-DB
DBX77 Channel vector error (1)
tered in the AW-DB
(DBB70).
DBX78.0
...5
Unassigned
When an operating
error occurs, the er-
ror number can be
DBX78.7 Operating error (see Chapter 11, Troubleshooting)
ror num
b
er can
b
e
read via Read re-
quest DBX42.5 (AW-
DB, DBB86 to 89)
DBB79...
83
Unassigned
Tips for the user
Following a diagnostic interrupt, the diagnostic information and the associated
module address (OB82_MDL_ADDR) is made available in the local data area of
OB 82 for quick analysis.
Module error
Internal
error
External
error
External
channel error
Byte.Bit: 78.0...7
Local data
COMM_FAULT
WTCH_DOG_FLT
INT_PS_FLT
EPROM_FLT
RAM_FLT
HW_INTR_FLT
MDL_DEFECT
PNT_FAULTEXT_FAULT
INT_FAULT
AW-DB
Fig. 6-3 Evaluating diagnostic data