| Definition: | special arrangement of several process computer systems, which solve identical problems with identical process data, so that in the event of failure of one process computer system the process is able to run in normal mode Note 1 to entry: For availability and reliability see IEC 61069-5, Industrial-process measurement and control – Evaluation of system properties for the purpose of system assessment – Part 5: Assessment of system dependability. Note 2 to entry: This entry was numbered 351-30-04 in IEC 60050-351:2006.
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