Siemens SIMATIC PCS 7 Function Manual page 64

Fault-tolerant Solutions in PCS 7
3.3 Solutions for communication
Configuration - redundant, fault-tolerant plant bus
The figure below shows the basic configuration of the redundant, fault-tolerant plant bus.
● Bus1 shows the functionally correct configuration (shared switches for AS and OS).
● Bus2 shows the typical configuration in PCS 7 plants (separate switches for AS and OS).
Note
Check the redundancy behavior of the individual components during commissioning.
Note
Address areas and IP addresses of the components on the plant bus
Always assign IP addresses in different IP address ranges to the network adapters (separate
address range for Bus1 and separate address range for Bus2).
Example:
● Ring 1:
– IP address range: 192.168.1.0 - 192.168.1.255
– Subnet mask: 255.255.255.0
● Ring 2:
– IP address range: 192.168.2.0 - 192.168.2.255
– Subnet mask: 255.255.255.0
64
Redundant, fault-tolerant plant bus
Industrial Ethernet
Fault-tolerant Process Control Systems (V8.1)
Function Manual, 11/2014, A5E34878832-AA