Siemens SIMATIC S7-200 - Network Masters; Network Overview; Using a PC;PPI Cable for Communicating with Several S7-200 Cpus with the Multiple Master Option Enabled

Setting Up Communications Hardware and Network Communications
7-27
S7-200 Programmable Controller System Manual
A5E00066097-02
7.5 Network Overview
Network Masters
Figure 7-21 shows a configuration with a personal computer connected to several
S7-200 CPUs. STEP 7-Micro/WIN 32 is designed to communicate with one S7-200
CPU at a time; however, you can access any CPU on the network. The CPUs in
Figure 7-21 could be either slave or master devices. The TD 200 is a master
device.
TD 200
Station 5
RS-232
RS-485
PC/PPI
Cable
Station 0
S7-200 CPU
Station 2
S7-200 CPU
Station 3
S7-200 CPU
Station 4
Figure 7-21 Using a PC/PPI Cable for Communicating with Several S7-200 CPUs with the
Multiple Master Option Enabled