4-4
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01
You connect the permanently installed PG/PC in the MPI network to one or
more nodes of the MPI network according to the rules explained in Section
3.2.
Figure 4-2 shows a C7 network with two C7s. The two C7s are
interconnected using a PROFIBUS LAN cable.
PROFIBUS LAN cable
C7
C7
PG/PC
PROFIBUS LAN cable
Figure 4-2 Connecting a PG/PC to more than One C7
If there is no stationary programming device/PC, we recommend the
following procedure:
To attach a programming device/PC to an MPI network with an “Unknown”
node address, it is advisable to set the following address on the service
programming device/PC:
S MPI address: 0
S Highest MPI address: 126.
Following this, use the STEP 7 function Hardware Configuration to find out
the highest MPI address in the MPI network and then set the highest MPI
address on the programming device/PC to the same value as that of the MPI
network.
Permanently
Installed
Programming
Device/PC
Connecting a
Programming
Device/PC when
Service is
Required
Connecting a Programming Device / PC to a C7
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