Siemens SIMATIC S7-400H - Page 248

Communication
14.6 Communication via fault-tolerant S7 connections
S7-400H
248 System Manual, 03/2012, A5E00267695-11
Configuration view ≠ Physical view
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Figure 14-15 Example of redundancy with fault-tolerant system and redundant bus system
Configuration view = Physical view
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Figure 14-16 Example of fault-tolerant system with additional CP redundancy