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 14/84
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BID21669756_Zeitschaltuhr_einfach_DOKU_v20_e.doc
Furthermore, the application contains additional functions such as
summer/winter time changeover as well as taking holidays into
consideration.
The additional function „Summer/winter time changeover“ is conducted by
default by the FB103 „summer_winter“. Optionally this changeover can also
be controlled by means of a radio-controlled clock. In this case a digital
input module is necessary (i.e. SM321), as two digital inputs are required in
order to receive the data sent from the clock module.
For each absolute or relative clock (corresponds to a function call of a
function block) a view is used in the HMI system.
S7-CPU
HMI System
View 4
View 3
View 2
View 1
Fig. 2-3 Function scheme
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