Commissioning
8.5 Commissioning PROFIBUS DP
S7-300, CPU 31xC and CPU 31x: Installation
8-30
Operating Instructions, Edition 08/2004, A5E00105492-05
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 Configuration example for the address areas of transfer memory
Type
Master
address
Type
Slave
address
Length Unit
Consistency
1
E
222
A
310
2
BYTE
Unit
2
A
0
E
13
10
Word
Total length
:
32
Address areas in the
DP master CPU
Address areas in the
DP slave CPU
These address area parameters have to
be the same for DP master and DP slave.