Siemens SIMATIC PCS 7 - Page 72

Configuration - redundant, high availability plant bus
The figure below shows the basic configuration of the redundant, high availability 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.
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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 area: 192.168.1.0 - 192.168.1.255
– Subnet mask: 255.255.255.0
● Ring 2:
– IP address area: 192.168.2.0 - 192.168.2.255
– Subnet mask: 255.255.255.0
AS 41xH on redundant, high availability plant bus
High availability solutions in PCS 7
4.3 Solutions for communication
High Availability Process Control Systems (V9.0)
72 Function Manual, 05/2017, A5E39221836-AA