Siemens Simatic S7-300 CPU 31xC Series Installation And Operating Instructions Manual page 154

Commissioning
8.5 Commissioning PROFIBUS DP
Address areas of transfer memory
In STEP 7, configure the I/O address areas:
• You can configure up to 32 I/O address areas.
• Maximum length per address area is 32 bytes.
• You can configure a maximum of 244 input bytes and 244 outputs bytes.
The table below shows the principle of address areas. You can also find this figure in the
STEP 7 configuration.
Table 8-10
1
2
:
32
8-30
Configuration example for the address areas of transfer memory
Type Master
address
E 222
A 0
Address areas in the
DP master CPU
Type Slave
address
A 310
E 13
Address areas in the
DP slave CPU
Operating Instructions, Edition 08/2004, A5E00105492-05
Length Unit Consistency
2 BYTE Unit
10 Word Total length
These address area parameters have to
be the same for DP master and DP slave.
S7-300, CPU 31xC and CPU 31x: Installation