Commissioning
8.4 Commissioning the Modules
S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
8-15
8.4.5.3 Connecting the PG to several nodes
Requirements
The PG must be equipped with an integrated MPI interface or an MPI card in order to
connect it to an MPI.
Connecting the PG to several nodes
1. Use bus connectors to connect a PG which is permanently installed on the MPI subnet to
the other nodes of the MPI subnet.
The figure below shows two networked S7-300s which are interconnected by means of bus
connectors.
PG
SF
BUSF
DC5V
FRCE
RUN
STOP
SIEMENS
CPU
PS
2
SM
SM
2
1
CPU
PS
The figure illustrates the following
(1) PROFIBUS bus cable
(2) Connector with enabled terminating resistor
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