GJR5253300R3161 硬件与软件

GJR5251400R0101
GJR5251300R2171
GJR5251300R0171
GJR5251300R0161
GJR5251300R0101
GJR5251000R0202
GJR5251000R0101
GJR5250500R0902
GJR5250500R0262
GJR5250500R0202
GJR5250500R0101
GJR5250000R0303
GJR5250000R0252
GJR5250000R0202
GJR5250000R0151
GJR5250000R0101
FPR3600228R1202
FPR360227R1202
FPR3600227R0206
FPR3600201R1202

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Description

为使PLC能可靠工作,在硬件与软件两个方面PLC厂家都采取了很多措施,对一些特殊可靠要求的PLC,还有相应的特殊的措施,如热备、冗余等等。这在介绍PLC的特点时已作了叙述。可靠措施的目的是增加PLC平均故障间隔时间、MTBF(MeanTimeBetweenFailure)及减少PLC的平均修复时间、MTTR(MeanTimeToRepair),以提高PLC的有效度A(Availability)

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