Siemens Simatic S7-300 CPU 31xC Series User Manual

Configuring
4.11 Planning subnets
S7-300, CPU 31xC and CPU 31x: Installation
4-44 Operating Instructions, Edition 08/2004, A5E00105492-05
Example: CPU 314C-2 DP as MPI and PROFIBUSnode
The figure below shows you an assembly with a CPU 314C-2 DP integrated in an MPI
subnet and also operated as DP master in a PROFIBUS subnet.
S7-300
CPU
PS
CPU
S7-300
CPU
PS
CPU
PG
9
PROFIBUS subnetMPI subnet
S7-300 CPU
with DP interface
as DP master
RS 485
repeater
MPI address 2
MPI address 3
MPI address 4
MPI address 6
MPI address 5
OP 27
MPI address 7
MPI address 8
MPI address 0
S7-300
CPU
PS
CPU
S7-300
PS
CPU
OP 27
CPU
PS
DP-CPU
ET200M
ET200M
ET200M
ET200M
ET200M
ET200M
ET200B
ET200B
S5-95U
S5-95U
S5-95U
DP address 3
DP address 4
DP address 9 DP address 8
DP address 10 DP address 11
DP address 5
DP address 6
DP address 7
2
1
1
1
1
1
1
DP address 2
Key to numbers in the figure
(1) Terminating resistor enabled.
(2) PG connected via a stub cable for maintenance or commissioning purposes

Siemens Simatic S7-300 CPU 31xC Series Specifications

General

Series	S7-300 CPU 31xC
Power Supply	24 V DC
Communication Interfaces	MPI, PROFIBUS DP
Programming Languages	LAD, STL, FBD, SCL
Operating Temperature	0°C to +60°C
Memory	48 KB - 512 KB
Dimensions	40 x 125 x 130 mm (varies by model)