Siemens SIMATIC NET CP 243-1, Operating Instructions Manual

Page: 67 / 142

Configuration
3.4 Other options when configuring a CP 243-1
CP 243-1
Operating Instructions, 03/2012, C79000-G8976-C244-02
67
Table 3- 1 Special memory area
Position in the S7-200 system Occupied special memory area
CPU -
0 200..249
1 250..299
2 300..349
3 350..399
4 400..449
5 450..499
6 500..549
3.4.2 Structure of the configuration data block (CDB)
The CDB is created by the Internet wizard in STEP 7 Micro/WIN 32. The structure of the
CDB is shown below in the following table.
Table 3- 2 Structure of the CDB
Byte offset in
variable memory Description Data format Example
Header
0-4
Module name 5 bytes ASCII 16#4350323433
"CP243"
5-6 Length of the CDB 2 bytes, hex 16#006C
(108 decimal)
7-8 Length of the NPB 2 bytes, hex 16#0014
(20 decimal)
General information
9
Internal system use 1 byte, hex
10 Internal system use 1 byte, hex
11-12 Reserved for STEP 7 Micro/WIN 32 2 bytes, hex