Siemens SIMATIC S7-300 Manual page 72

Defining Parameters of the FM 354
5.3.4 Traversing programs
DB structure
Table 5-8 gives you a general view of the structure of the "traversing pro-
grams" data block (DB-NC).
Table 5-8 DB structure – traversing programs
Byte Variable type
0 WORD
2 WORD
4 DWORD
8 WORD
10 WORD 1
12 2 STRING NC
16 DWORD 354
20 4 CHAR 0
24 DWORD 1...3
28 WORD
30 WORD
32 18 STRING ASCII charac-
ters
52 STRUCT NC block
72 STRUCT NC block
92 STRUCT NC block
5-20
Value Significance of the variables
DB header
Rack slot
DB No. ( 1000)
Reserved
Error No. (from FM)
Channel number
DB identifier/type
Module identifier
Version number/block number
Measurement-system grid per MD7
Reserved
Reserved
NC program name
NC block new (modification range)
1st traversing block
2nd to 100th traversing block
Comment
Module address
As in DB header
With MMI services
2 ASCII characters
FM 354
(DB structure)
Unit of measurement
max. 18 characters
see Section 9.3.11, 10.1
FM 354 Servo Drive Positioning Module