Communication - Siemens SIMATIC PCS 7 Function Manual

Failure, Switchover and Return of Fault-tolerant Components

6.3 Communication

Result
When the CPU in Rack 1 is back online, the "Operating mode" dialog box appears as follows:
6.3 Communication
6.3.1 Failure of redundant bus components
Functionality
As soon as a fault occurs on a transmission path, the second transmission path takes over
and forwards the signals.
Failure scenarios
The following problems can occur on a bus component:
● Defective bus component (e.g., CP, coupler, AFD, AFS, cable)
● Problem on a bus line (e.g., overload, wire break)
Additional information
● Manual
● Manual
● Manual
180
SIMATIC Net Twisted Pair and Fiber-Optic Networks
SIMATIC NET; Industrial Ethernet OSM/ESM
SIMATIC Net PROFIBUS Networks
Fault-tolerant Process Control Systems (V8.0)
Function Manual, 03/2012, A5E02779471-02