Task; Solution; Overview - Siemens LOGO! 8 Manual

1 Task

2.1 Overview

1 Task
Introduction
For street lights, factors like remote control, networking and potential energy saving
are becoming increasingly important.
With this in mind, the street lights in a street shall be automatically switched
on and off at sunset and sunrise. In addition, it shall be possible to insert a switch-
on time for the street lights via SMS, or manually on site.
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Solution

2.1 Overview
Schematic layout
The figure below shows a schematic overview of the most important components of
the solution:
Figure 2-1
Astro clock
In the automation solution, the street light is controlled with a LOGO! 8 connected
to a LOGO! CMR.
Setting a manual street light control (user-defined mode) or an automatic control
(astro clock mode) can be performed via SMS or LOGO! TDE.
In astro clock mode, the street light is switched off in the morning and back on at
night using the "Astronomical clock" function.
In user-defined mode, a user-defined time of day can be entered via LOGO!
display or LOGO! TDE at which the street light shall be switched on, the day after.
The time of day of the LOGO! controller is synchronized with an NTP server using
LOGO! CMR so LOGO! constantly has the correct UTC time.
LOGO! Set 1
Entry ID: 109063024, V1.0,
SMS
Control command
hh:mm
Time-of-day
synchronization
NTP server
07/2015
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