Siemens LOGO! Series Manual page 196

LOGO! functions
4.4 Special functions list - SF
Timing diagram
The following illustration is an example of the timing diagram where Ta refers to the current
time of the LOGO! Base Module:
Functional description
The function calculates the TR and TS values at the input and sets Q when Ta (Ta is the
current LOGO! Time) is between TR and TS; otherwise, the function resets Q.
If automatic summertime/wintertime conversion (see the topic Summertime/wintertime
conversion (Page 111) for details) is enabled, the function takes the configured time
difference into consideration when calculating the TR and TS values.
Setting the Par parameter
View in programming mode (example):
Press
Press
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Manual, 04/2011, A5E03556174-01
LOGO!