Applications for all sectors of industry and trade.pdf

(1548 KB) Pobierz
s
Applications for all sectors
of industry and trade
August 2000
Contents
LOGO! applications for all sec-
tors of industry and trade
LOGO! is universally applicable. With
its high functionality and simple op-
eration, LOGO! offers you a high de-
gree of economy in almost every ap-
plication and sector.
This collection of LOGO! applications
contains information on practical ex-
amples from industry and trade. Apart
from the descriptions of the require-
ments, you will find the comparison
between the previous solution and the
LOGO! solution, the components
used, the advantages and special
features, and the corresponding con-
trol program diagrams.
The individual functions to be com-
bined are represented by easily un-
derstood symbols in the LOGO! con-
trol program. In practice, you simply
link these ready-made functions to
your control program, either directly at
the equipment or at the PC by means
of the convenient programming soft-
ware LOGO!Soft Comfort.
LOGO!Soft Comfort provides you with
a clearly arranged viewing area, on
which you can display and modify
your control program in the overall
view. Free demonstration software and
the ready-made control programs can
be found quickly and conveniently on
the Internet or on a CD-ROM which
you can request via your local LOGO!
partner (see reverse).
Lighting control
Guest rooms in luxury hotel
Rows of luminaires
Shop window lighting
Exterior and interior lighting of a house
Lighting in a sports hall
Outdoor lighting
Page
2
3
5
6
8
10
11
12
14
15
16
18
21
22
24
25
26
27
28
30
32
34
36
38
41
42
44
46
49
50
52
53
54
55
58
60
63
64
66
68
70
72
74
75
76
78
1
Monitoring systems
Intelligent door monitor systems
First alarm
Monitoring of parking lots
Door and gate control
Gate control in a fire station
Automatic door
Industrial gate
Economical room automation
Service water pump
Watering of greenhouse plants
Controlling roll-down shutters
Bell system in a school
Building installation examples under machine control
Heating, ventilation and air-conditioning
Large-scale refrigeration plants
Ventilation system
Continuous capacity utilization of three loads
Boiler sequence control
Ventilation control
Step switch for ventilators
Monitoring utilization time (solar energy system)
Transport systems
Conveyor belt controller
Controlling conveyor belts
Control of an elevating platform
Controlling strip heaters and conveyor belts
Machine control
Reversible flow filters
Control of a winder
Controlling a bending machine
Controlling a cream stirrer
Sequence control of machines for welding cables
Control of several pumps/pump pairs
Cutting tool for fuses
Changeover circuit (compressors)
Intelligent pedal control
Pump control
Switching off and activation of pumps/fans
Up/down movement with one momentary switch
Sequence timer
Cam timer
Controlling a silo-filling system
Special solutions
Warning boards on french motorways
Control of automatic feeders, for example for trout
Killing Germs with Gas
© Siemens AG 2000
All rights reserved.
LOGO! Application collection
August 2000
Lighting control
LOGO! takes over Guest Rooms in Hongkong Luxury Hotel
Time to change
The new LOGO! room control facility
pays off of course not only for the
hotel guest. With this logic module the
hotel has acquired state of the art
technology combined with cost sav-
ings of almost two thirds. Unlike the
previous solution with its dedicated
electronics, LOGO! is a standard
product with open and user-friendly
programming: Considering the variety
of rooms, this greatly facilitates the
individual presettings for the technical
personnel.
No wonder therefore that LOGO! won
the tender in competition with seven
other bidders. After the first few
months of operation, the “Great Eagle”
was clearly convinced of the Siemens
quality and LOGO!, and appreciated
the technical support as well as the
local supply service: The chief engi-
neer of the hotel gave a credit rating
of 90 out of a 100 for LOGO! And the
hotel has a further 400 rooms waiting
to be fitted with this control system.
The former “Hong Kong Renais-
sance Hotel” is not only the
bearer of a new name. Many
rooms of this establishment
known today as the “Great Ea-
gle Hotel” now feature
LOGO! 24RL-a future-oriented
control system for enhancing
the comfort and convenience of
guests and technical personnel.
“Come in and feel at home", is the
motto of the five star hotel in Hong
Kong’s city. As soon as a guest opens
the door to the continually air-condi-
tioned room, the light in the corridor
automatically turns on for half a min-
ute. Ample time for switching on the
adjacent main switch for lighting and
television. The energy relay, which
during the guest’s absence takes care
of temperature control and
ventilator regulation, switches off
automatically on activation of this main
switch, allowing the hotel guest to
adjust the temperature at will. The next
step also does not require the guest to
move about, even though the room
and passageway lighting switches are
located at three different points.
A visitor wishing just to rest simply
presses the “Do not disturb” switch,
thereby causing LOGO! to disable the
room wake up alarm and door bell.
Once the guest leaves the room after
relaxation and activating the main
switch, LOGO! switches the main
current supply completely off again-
except that the passageway lighting
still stays on for thirty seconds and the
energy relay for automatic tempera-
ture control is activated again.
Modern times: LOGO! checks into hotel
buildings of the Hong Kong metropolis
2
LOGO! Application collection
Siemens
August 2000
Lighting control
Rows of luminaires
Requirements
In planning the lighting installations for
commercial rooms, the type and num-
ber of luminaires are specified ac-
cording to the desired illuminance.
The fluorescent lamps are often ar-
ranged in the form of rows of lumi-
naires. Subdivision into individual
circuit groups takes place according
to room utilization. The objective is to
implement control of the individual
circuit groups with LOGO!. It must be
possible to switch the individual rows
of luminaires directly and locally.
When there is sufficient daylight, the
rows should be switched off automati-
cally on the window side by a light-
dependent switch. At 8 p.m. the lights
are switched off automatically, but it
must be possible to operate the light-
ing manually at all times.
Independently of this, they are reset
by the time switch or by the light-
dependent switch, via the main-Off
input. The Off-commands must be
shortened by interval time-delay re-
lays, so that local operation is still
possible after switching off.
Components used
- LOGO! 230RC
I1
I2
I3
I4
I5
Q1
Q2
Q3
Q4
pushbutton, luminaire 1
(normally open)
pushbutton, luminaire 2
(normally open)
pushbutton, luminaire 3
(normally open)
pushbutton, luminaire 4
(normally open)
photoelectric switch
(normally open)
luminaire 1, window side
luminaire 2, window side
luminaire 3, hall side
luminaire 4, hall side
LOGO! solution
The circuit can be considerably sim-
plified with LOGO!. It is merely neces-
sary to connect the pushbuttons and
the photoelectric switch to the input
terminals, and connect the luminaires
to the output terminals. Contactors
should be provided for higher power
switching. The rows (Q1 to Q4) can
be switched on and off as required,
via the pushbuttons at I1 to I4. If the
photoelectric switch at I5 responds,
the rows at the window side (Q1 and
Q2) are switched off. At 8 p.m. an Off-
pulse is also generated via the integral
time switch, turning off all the rows.
However, the lighting can still be op-
erated manually.
Advantages and Specialties
Fewer components are required than
for the conventional solution.
Thanks to the reduced number of
switching devices, a space-saving
and smaller sub-distribution board
can be used.
The lighting installation can be easily
modified. For example, additional
switching times can be set (se-
quenced Off-pulses at the end of the
day).
Previous solution
The luminaires are switched by cur-
rent-pulse relays, operated by the
pushbuttons at the door.
L1
lx>
B1
E1
K1
K2
S1
S2
K2
S3
S4
K3
K4
K5
K6
E1
N
K1
K2
K3
K4
K5
K6
E2
E3
E4
E5
Previous solution
Siemens
August 2000
LOGO! Application collection
3

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin