Time switch based on the S7-300/400 CPUs with simple HMI system
including radio-controlled clock connection
Rev. B - final 19.07.2002 37/84
Copyright © Siemens AG 2005 All rights reserved
BID21669756_Zeitschaltuhr_einfach_DOKU_v20_e.doc
CheckEdge = 1:
EnableCloc
CheckEdg
StartTim
Reset
Time active
Output
Fig. 4-9 Pulse diagram CheckEdge = 1
The block for the relative time switch “relative ” FB124 is parameterized as
illustrated in the figure below. Data block DB124 is used as instance data
block:
Fig. 4-10 Configuration “relative time switch”
Basic data
RAM requirements:
relative: 602 bytes
Instance DB: 58 bytes
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