Siemens SIMATIC S7-400H - Comparison of System Configurations with Standard and Fault-Tolerant Communication

Characteristic values of redundant automation systems
A.2 Comparison of MTBF for selected configurations
S7-400H
446 System Manual, 03/2012, A5E00267695-11
A.2.3 Comparison of system configurations with standard and fault-tolerant
communication
The next section shows a comparison between standard and fault-tolerant communication
for a configuration consisting of a fault-tolerant system, a fault-tolerant CPU operating in
stand-alone mode, and a single-channel OS.
The comparison only took account of the CP and cable communication components.
Systems with standard and fault-tolerant communication
Standard communication Base line
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1
Fault-tolerant communication Factor
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Approx. 80