Siemens SINUMERIK FM-NC Installation And Startup Manual page 42

3 Settings, MPI / OPI
3.2 Standard configuration
MPI interface and
GD circle
3-42
Table 3-2 Relationship between bus address and
GD circle
Bus addresses on the
MPI
15,14,13
12,11
10, 9
8, 7
6
5, 4
Example:
Two machine control panels (MCPs) are to be connected to the MPI of a con-
troller. The first MCP can be connected to bus address 15 (GD circle 1), and the
second to bus address 12 (GD circle 2).
Note
If, for example PLC-PLC cross-communication is to be configured on the MPI
using the STEP 7 "Communication Configuration" tool, and one or more MCPs
are connected to the MPI, you should ensure that the allocation of GD circles is
unique. The STEP 7 "Communication Configuration" tool allocates GD circles in
ascending order starting with GD circle 1. If the MCPs are connected to the
operator panel interface, there is no effect on PLC-PLC communication on the
MPI.
Example:
"Communication Configuration" allocates GD circles 1 and 2 for PLC-PLC
cross-communication. A first MCP on the MPI can then be connected to GD
circle 3 (bus address 9 or 10), and a second MCP on the MPI can be connected
to GD circle 4 (bus address 7 or 8).
SINUMERIK 840D Installation and Start-Up Guide (IAD) – 04.00 Edition
GD circle
1
2
3
4
8
5
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