Time switch based on the S7-300/400 CPUs with simple HMI system
including radio-controlled clock connection
Rev. B - final 19.07.2002 62/84
Copyright © Siemens AG 2005 All rights reserved
BID21669756_Zeitschaltuhr_einfach_DOKU_v20_e.doc
Below, an example is illustrated of how the outputs of the individual time
switches are connected in the application case 1. This is for controlling
valves for example.
D1
D2
W2
M1
OR
Y
H
D2
M1
OR
On a holiday, the clocks are reset to W1 and Y
W1
W3
AND
M2
Fig. 6-8 Example
The following points can be taken from the example:
• The outputs of a clock can be linked several times in the program
• Various outputs of clocks can be linked with an object, for example a
valve.
• Individual clocks can be “switched off” by means of the holiday block.
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