SUPERIOR ELECTRIC SS2000I-V 配件

CACR-SR15BB1BM
6SN1146-1BB02-0CA1
5C5601.32
VT-VPCD-1-1X/V0/1-0-1
HMCP400X5W
DS200CDBAG1BCB
6445-001-K-N
melecc-872

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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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