09/02 Configuration
CP 243-1
J31069-D0428-U001-A1-7618
37
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
Occupied SM
area
Remark
CPU - -
0 200..249 -
1 250..299 Only supported by CPU firmware version
1.2 or higher
2 300..349 Only supported by CPU firmware version
1.2 or higher
3 350..399 Only supported by CPU firmware version
1.2 or higher
4 400..449 Only supported by CPU firmware version
1.2 or higher
5 450..499 Only supported by CPU firmware version
1.2 or higher
6 500..549 Only supported by CPU firmware version
1.2 or higher
Table 2: System flag area
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