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Time switch based on the S7-300/400 CPUs with simple HMI system
including radio-controlled clock connection
Rev. B - final 19.07.2002 6/84
Copyright © Siemens AG Fehler! Unbekannter Name für
Dokument-Eigenschaft. All rights reserved
BID21669756_Zeitschaltuhr_einfach_DOKU_v20_e.doc
Preamble
Many systems in automation technology (e.g. in the field of Heating,
Ventilation & Air Conditioning) require a control dependent on time of the
day and day of the week. Apart from the time dependent control of certain
processes, a monitoring and control function is also necessary for these
time switch functions.
We take an everyday automation problem (see chapter 1) and present all
required solution elements individually. The solution consists of standard
SIMATIC components plus the software blocks developed especially for
this application. The blocks are designed so that they can be used directly
for concrete problems or they can be adjusted to an individual task by
simple expansion/reduction.
pplikation
software
SIMATIC
Standard
components
... Provided by you
... Delivered with the application
+
This application offers a convenient and quick way to implement the "Time
switch" key function. A HMI interface is provided allowing the operator to
control the application.
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