Connecting Multiple Devices On A Network; Overview; Communicating With Multiple Cpus; B.1 Overview - Siemens S7-200 System Manual

Connecting Multiple Devices on a Network

B.1

Overview

Overview of Appendix B
You can connect multiple TD devices and S7-200 CPUs together on one communication
network. The TD devices act as network masters and do not interfere with each other. You
can designate the S7-200 CPUs to be either masters or slaves on the network.
B.2

Communicating with Multiple CPUs

Communicating with Multiple CPUs
Figure B-1 shows a typical network with two TD 200s and two S7-200 CPUs. Each TD 200
communicates to one of the CPUs. The addresses of each device are noted below the
device in the figure. In this example:
● TD 200 Number 1 is configured to communicate to the S7-200 CPU at address 2 (CPU 1)
● TD 200 Number 2 is configured to communicate to the S7-200 CPU at address 3 (CPU 2)
Tip
You can connect multiple TD devices to a single S7-200 CPU. You can store separate
parameter blocks for each TD device in different V memory locations in the CPU.
If you do not store separate parameter blocks for each TD device that is connected to the
CPU, any of these TD devices can acknowledge the same messages and use function keys
to initiate operations in the CPU.
Figure B-1
Text Display (TD) User Manual
System Manual, 08/2008, A5E00765548-03
Typical Multiple CPU Network
B
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