Occupied System Flag Area (Sm Area); Table 2: System Flag Area - Siemens SIMATIC NET CP 243-1 Technical Manual

09/02
4.4.1

Occupied system flag area (SM area)

The CP 243-1 occupies 50 bytes in the S7-200 CPU system flag area. The ad-
dress of these 50 bytes depends on the position in which a CP 243-1 is currently
located in an S7-200 system. Primarily general information and status information
of the CP 243-1 are stored in these 50 bytes. The last four bytes contain a pointer
through which one can access the CP 243-1 configuration data. These configura-
tion data are consecutively stored in the S7-200 CPU variables memory. They are
subdivided into the:
• Configuration Data Block (CDB)
• Network Parameter Block (NPB)
• Network Data Block (NDB)
The following table shows the relationship between the position of a module in the
S7-200 system and the associated system flag area.
Position in S7-200
system
CPU
0
1
2
3
4
5
6

Table 2: System flag area

CP 243-1
J31069-D0428-U001-A1-7618
Occupied SM
area
-
200..249
250..299 Only supported by CPU firmware version
1.2 or higher
300..349 Only supported by CPU firmware version
1.2 or higher
350..399 Only supported by CPU firmware version
1.2 or higher
400..449 Only supported by CPU firmware version
1.2 or higher
450..499 Only supported by CPU firmware version
1.2 or higher
500..549 Only supported by CPU firmware version
1.2 or higher
Configuration
Remark
-
-
37