Warranty, Liability and Support
Time switch based on the S7-300/400 CPUs with simple HMI system
including radio-controlled clock connection
Rev. B - final 19.07.2002 8/84
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BID21669756_Zeitschaltuhr_einfach_DOKU_v20_e.doc
1 Illustrate the performance of the entire applicationThe
Automation Problem - An Overview
Precise time tuning is necessary in many fields. Even in household
technology for example, systems must work dependent on time of the day
or day of the week. One possible solution for this problem are electrical and
mechanical time switches. The following figure shows examples for
electrical time switches:
Fig. 1-1 Examples of time switches
These are all hardware clocks which enable solving the time switching
problem for example in the field of household technology. These clocks are
readily available in many DIY superstores. Operating the devices is so
simple that a layperson can use this clock easily.
Apart from these “primitive applications”, time-dependent controls are also
required in large areas of automation technology. Some “professional
applications” are illustrated in the following table.
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