DS215KLDCG1AZZ03A GE

3BSC610037R1 ABB 7 1
3BSC610067R1-800xA SD834 ABB _
3BSC690073R1 ABB _
3BSC690087R1-800xA ABB
3BSC950056R1 TK576V115 ABB
3BSC950107R3-800xA TK811V150 ABB
3BSC950193R1-800xA TB850 ABB
3BSE003580R1 SA168K03 ABB
3BSE004253R1 SX540POWER DISTR.UNITSE ABB
3BSE007913R10 ABB
3BSE008538R1-800xA TB807 ABB

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描述

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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