Siemens SIMATIC FM 353 - Traversing Programs

Defining Parameters
5-23
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
5.3.4 Traversing programs
DB structure
Table 5-7 gives you a general view of the structure of the “traversing programs”
data block (DB-NC).
Table 5-7 DB structure − traversing programs
Byte
Variable type Value Significance of the variables Comment
DB header
0 WORD Rack slot Module address
2 WORD DB No. ( 1000) As in DB header
4 DWORD Reserved
8 WORD Error No. (from FM) With HMI services
10 WORD 1 Channel number
12 2 STRING NC DB identifier/type 2 ASCII characters
16 DWORD 353 Module identifier FM 353
20 4 CHAR 0 Version number/block number (DB structure)
24 DWORD 1 − 3 Measurement-system grid per MD7 Unit of measurement
28 WORD Reserved
30 WORD Reserved
32 18 STRING ASCII char. NC program name max. 18 characters
52 STRUCT NC block NC block new (modification range)
72 STRUCT NC block 1st traversing block
92 STRUCT NC block 2nd to 100th traversing block see Section 9.3.11, 10.1