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Sample Rs485 Network Configurations; Single-Master Ppi Networks; Multi-Master And Multi-Slave Ppi Networks - Siemens SIMATIC S7 System Manual

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8.6.3

Sample RS485 network configurations

8.6.3.1

Single-master PPI networks

Introduction
The following network configurations are possible using only S7-200 SMART devices:
● Single-master PPI networks
● Multi-master and multi-slave PPI networks
● Complex PPI networks
Single-master PPI networks
In the sample network in the figure below, a human-machine interface (HMI) device (for
example, a TD400C, TP, or KP) is the network master:
In the sample network, the CPU is a slave that responds to requests from the master.
8.6.3.2

Multi-master and multi-slave PPI networks

The following figure shows a sample network of multiple masters with one slave. The HMI
devices share the network.
The HMI devices are masters and must have separate network addresses. The
S7-200 SMART CPU is a slave.
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
Communication
8.6 RS485
451

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