Siemens SIMATIC PCS 7 Function Manual page 48

Fault-tolerant Solutions in PCS 7
3.3 Solutions for communication
Availability
If there is a fault in a ring line, the communication between clients and servers via the switches
remains unaffected. However, if one of the switches fails, the link between the connected OS
servers and the OS clients is interrupted. To increase the fault-tolerance even more, however,
the redundant ring described in the following section can be used.
Additional information
● Manual
● Operating Instructions
● Operating Instructions
48
SIMATIC Net Twisted Pair and Fiber-Optic Networks
SIMATIC NET; Industrial Ethernet Switches SCALANCE X-400
SIMATIC NET; Industrial Ethernet Switches SCALANCE X-300
Fault-tolerant Process Control Systems (V8.0)
Function Manual, 03/2012, A5E02779471-02