Time switch based on the S7-300/400 CPUs with simple HMI system
including radio-controlled clock connection
Rev. B - final 19.07.2002 63/84
Copyright © Siemens AG 2005 All rights reserved
BID21669756_Zeitschaltuhr_einfach_DOKU_v20_e.doc
6.2 Application case 2: Pulse chain
In this application case a one-day time switch, a seven-day time switch, as
well as 3 relative time switches are used, whereby the 3 relative time
switches make up a pulse chain. This means: Clock 1 switches off -> Off
signal starts clock 2 -> clock 2 switches off -> Off signal starts clock 3. This
is illustrated in the figure below.
Clock
Clock
Clock
Fig. 6-9 Pulse diagram “pulse chain”
A view at the OP3 consists of several “windows” A “view” corresponds to 2
lines with 20 possible lines each. The upper line always displays the
explanation on the parameter which can be entered into the bottom line.
Text description of
the parameter
Input/Output-
field
„Window“ at OP 3
Fig. 6-10 Overview OP3 view
The clocks in this application case shall be activated with the following
parameters.
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