July 2004
Intermediate to advanced
352 pages
9h 30m
English
Content preview from Mitsubishi FX Programmable Logic Controllers, 2nd Edition
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//INTEGRAS/ELS/PAGINATION/ELSEVIER UK/PLC/3B2/FINALS-7-6-04/ 0750656794-CH026.3D – 279 – [279–281/3]
19.6.2004 9:19PM
26
Shift registers
AShiftregisterisacombinationofmemoryelements,whicharelinkedtogethertostore
dataandthenshiftthestoreddatainaleftwardsorrightwardsdirection.
26.1Shiftregisterapplications
Thefollowingisalistofapplications,whichrequiretheuseofashiftregister.
(a)Paralleltoserialconversion.
(b)Serialtoparallelconversion.
(c)Storageandshiftingofdatarelatingtoindustrialprocesses.
(d)Scanningofinputsignalssequentially,i.e.multiplexing.
26.2Basicshiftregisteroperation
The basic principle of operation for the ladder diagram shown below, is that
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