Configuration Example For The Address Areas In Intermediate Memory; Intermediate Memory In Cpu 31X-2 Dp/31Xc-2 Dp As Dp Slave - Siemens SIMATIC S7-300 Hardware And Installation Manual

That is, the DP master writes its Data to these intermediate memory address areas
and the CPU reads these data in the user program, and vice versa.
DP master
Figure 9-10 Intermediate memory in CPU 31x-2 DP/31xC-2 DP as DP slave
Address areas in intermediate 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 9-10
Type
1 E
2 A
:
32
Address areas in the
DP master CPU
S7-300 Programmable Controller Hardware and Installation
A5E00105492-02
Transfer memory
in the address
area
PROFIBUS

Configuration example for the address areas in intermediate memory

Master Type Slave
address address
222 A 310
0 E 13
Address areas in the
DP slave CPU
Commissioning
CPU as DP slave
I/Q I/Q
Length Unit Consistency
2 Byte Unit
10 Word Total length
These address area parameters
must be identical for DP master and
DP slave
9-33