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Multiple CPU Configurations
B.1
Configuring for Multiple CPU Communication
Figure B-1 shows a typical network. In this figure there are two TD 200s and two CPUs. Each
TD 200 communicates to one of the CPUs. The addresses of each device are noted below
the device in the figure. Refer to Section 3.8 for information about how to set an address in
the TD 200. Refer to the CPU's programming software documentation for help in changing
the address of the S7-200 CPU.
In this example, the TD 200 Number 1 is configured to communicate to the CPU at address 2
(CPU Number 1), and TD 200 Number 2 is configured to communicate to the CPU at
address 3 (CPU Number 2).
Note
You can connect multiple TD 200s to a single CPU. You can store separate parameter
blocks for each TD 200 in different V memory locations in the CPU. See Sections D.1 and
3.8 for more information. If you do not store separate parameter blocks for each TD 200
that is connected to the CPU, any of these TD 200s can acknowledge the same messages
and use function keys to initiate operations in the CPU.
TD 200 (Number 1)
Address 1
TD 200 (Number 2)
Address 4
Figure B-1 A Typical Multiple CPU Network
Network connectors are available from Siemens. Using these connectors allows you to
isolate the CPUs from one another (the 24 VDC), but still allows you to power the TD 200
from the CPU. See the SIMATIC S7-200 Programmable Controller System Manual for more
information on using network connectors.
B-2
CPU 212 (Number 1)
Address 2
TD/CPU
cable
CPU 212 (Number 2)
Address 3
Siemens network
connector with
programming port
2-conductor
shielded cables
To additional CPUs
SIMATIC TD 200 Operator Interface
C79000-G7076-C205-04
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