Siemens Automation System S7-400 Manual de usuario Pagina 102

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Networking
5-4
Automation System S7-400 Hardware and Installation
A5E00850741-01
Number of Nodes
MPI PROFIBUS DP
127 127 *
(default: 32) of which: 1 master (reserved)
1 PG port (reserved) 1 PG port (reserved)
125 slaves or other masters
* Observe theCPU-specific maximum numbers in the Reference Manual CPU Data
MPI/PROFIBUS-DP Addresses
In order for all nodes to be able to communicate with one another, you must assign
them an address:
In the MPI network, an MPI address
A PROFIBUS-DP address in the PROFIBUS-DP network
Default MPI Addresses
The following table shows the default MPI address and the max. MPI address with
which the devices are s hipped:
Node (Device) Default MPI Address Default Highest MPI
Address
Programming device 0 31
OP 1 31
CPU 2 31
Note
If you change the parameter assignment of the highest MPI address of the MPI/DP
interface, the new address remains set even after memory reset, voltage failure or
removing/inserting the CPU.
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