Siemens LOGO! 8 Manual page 10

2 Setup and description
1. Time-controlled switching on and off
The combination of different switching times expands the time switch function as
follows.
Standard switching time
Via the week timer function block "B002 StandardTime", the standard switching
time is defined.
Via the function block, it is set, on which weekdays and at which time the time
switch function switches the output Q1 on and off.
Event switching time
By linking the week timer "B001 EventTime" and yearly timer "B008 EventDay"
function blocks, an event switching time is defined.
Via the function blocks, the date and time is set for when the time switch function
switches the output Q1 on and off.
Figure 2-5: Blocks for time-controlled switching on and off
2. Suppress switching on at certain times
With the yearly timers "B006 SummerBreak", "B020 EasterBreak" and "B049
WinterBreak", a time period (e.g. holidays) can be defined during which the switch-
on via the standard switching times is suppressed.
With the weekly timer "B017 TimeLock", it can be defined, on which weekdays and
at which time the switch-on via the standard switching times is suppressed.
The event switching times are not suppressed and continue to switch. This allows a
planned switch-on and off, despite the suppressed standard switching times.
Figure 2-6: Blocks for suppressing standard switching times
Time Switch Function
Entry ID: 109745699, V1.0, 04/2017
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