1753-L32BBBM-8A 1753-L32BBBM-8A

1756-OF6CI
QAIO16/4-V
VMIVME-6015
AKDP02406-NAAN-0000
1785-L80E
SL3002-X2/GS80-200
6FC5247-0AA36-0AA1
750161-802RV.1.2
PM803F ABB
VMIVME7452
1783-SFP10GSRE
1326AB-B420H-21-K4 –

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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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