Table 4-2 Subnet Nodes - Siemens SIMATIC S7-300 Manual

Transmission rate
Maximum transmission rates:
• MPI/PROFIBUS DP: 12 Mbaud
• DP(DRIVE): 12 Mbaud
Note
Before you transfer projects to the Technology CPU via the MPI/DP interface, you should
increase the baud rate to at least 1.5 Mbaud or else the data transmission can take a very
long time (up to 15 minutes at 187.5 kbaud).
Number of nodes
Maximum number of nodes per subnet:
Table 4-2
Parameters
Number
Addresses
Comments
S7-300 CPU Data: CPU 315T-2 DP
Manual, 12/2005, A5E00427933-02
We recommend that you set 12 Mbaud for the Technology CPU
Subnet nodes
MPI
127
0 to 126
Default: 32 addresses
Reserved addresses:
Address 0 for PG
•
Address 1 for OP
•
Setting up an S7-300 with a Technology CPU
PROFIBUS DP
126
0 to 125
of which:
1 master (reserved)
1 PG connection
(address 0 reserved)
124 slaves or other
masters
4.4 Subnets
PROFIBUS DP (DRIVE)
33
1 to 125
of which:
1 master (reserved) and
•
32 slaves or drives
4-3