Siemens SIMATIC C7-626 Installation, Assembly, Wiring page 76

Connecting a Programming Device / PC to a C7
Fixed Installation
of Programming
Device/PC
4
Connecting the
Programming
Device/PC for
Service Purposes
4-4
With fixed installation of a programming device/PC in the MPI network, you
connect the programming device/PC via a bus connector directly with the
other nodes of the MPI network in accordance with the rules listed in
Section 3.2.
Figure 4-2 shows a C7 network with two C7s. Both C7s are connected to
each other via the PROFIBUS bus cable.
C7
Figure 4-2 Connecting a Programming Device to Several C7s
If there is no stationary programming device/PC available, we recommend
the following:
In order to connect a programming device/PC for service purposes to an MPI
network with "unknown" node addresses, we recommend that you set the
following address on the service programming device/PC:
MPI address: 0
Highest MPI address: 126.
Then find out the highest MPI address in the MPI network using the STEP 7
application Hardware Configuration and adjust the highest MPI address on
the programming device/PC to match that of the MPI network.
PG/PC
PROFIBUS bus cable
PROFIBUS bus cable
C7
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01