The system behind how multiple networks from different platforms are associated in a building or in a firm

1. BUILDING MANAGEMENT
SYSTEM
Prepared by
M.Charan

2. INDEX
 Introduction
 Characteristics
 Protocols of BMS
 BAC net
 Lon WORKS
 Building automation
 Lighting control system
 Maintenance & Applications
 References

3. INTRODUCION
 BMS is a computer based control system installed in every building.
 To monitor mechanical and electrical equipment.
 Consists of software and hardware.
 Software program configured in a hierarchy, comprises protocols like C-Bus
and Profi-Bus.
 Supports internet protocols and open standards such as DeviceNet, SOAP,
XML, BAC net, Lon WORKS and Mod-bus.

4. CHARACTERISTICS
 BMS are most commonly implemented in large projects with extensive
mechanical, electrical, and plumbing systems.
 Systems linked to a BMS typically represent 40% of a building's energy
usage; if lighting is included, this number approaches 70%.
 Improper installation causes malfunction of the system and loss of energy.
 The four basic functions of a central, computer-controlled BMS are:

Controlling

Monitoring

Optimizing

Reporting

5. PROTOCOLS & OPEN STANDARDS
 DeviceNet
•
Network system used in the automation industry to interconnect control devices for data exchange.
 SOAP
•
Exchanging structured information in the implementation of Web Services in computer networks.
 XML
•
Defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.
 BAC net
•
Communication protocol for building automation and control networks.
 Lon WORKS
•
A networking platform specifically created to address the needs of control applications.
 Modbus
•
A serial communications protocol for use with its programmable logic controllers (PLCs).

6. BACnet(building automation and control networks)
 BACnet was designed to allow communication of building automation and
control systems for applications such as HVAC, Light control system, Access
control system etc.
 Provides mechanisms for computerized building automation devices to
exchange information, regardless of the particular building service they perform.
 Overview of this protocol is that many services that are provided or installed can
communicate between building devices.
 Services are used for device and object discovery.
 Defines a number of Objects that are acted upon by the services.
 Objects include Analog Input, Analog Output, Analog Value, Binary Input, Binary
Output, Binary Value, Multi-State Input, Multi-State Output, Calendar, EventEnrollment, File, Notification-Class, Group, Loop, Program, Schedule, Command,
and Device.

7. LonWORKS(Local operation network)
 Lon WORKS is a network platform specifically created to address the needs of
control applications.
 Platform is created by Echjelon corporation for networking devices over media
such as twisted pair, power lines, fiber optics and RF.
 Two physical layer signaling technologies are used
1)Twisted pair-free topology
2)power line carrier
 The two-wire layer operates at 78 kbit/s, while the power line achieves either
5.4 or 3.6 kbit/s, depending on frequency.

LonWorks platform-based control applications are being implemented with
some sort of IP integration, and accomplished with the web services and IP
routing products.

8. BUILDING AUTOMATION
 The advanced functionality provided by the control system of a building.
 The control system is a computerized, intelligent network of electronic
devices designed to monitor and control the mechanical, electronics, and
lighting systems in a building.
 Figure depicts the whole network
which is installed in a building.

9. BUILDING AUTOMATION
 Topology
•
Building automation networks consist of a primary and secondary bus which connect high-level
controllers with lower-level controllers, input/output devices and a user interface.
•
Protocols such as Lonworks, Bacnet, ASHRAE, ZigBee.
•
Inputs and outputs are either analog or digital
 Infrastructure
•
Controller
•
Occupancy
•
Lighting
•
Air handlers
•
Central plant
•
Alarms and security

10. LIGHTING CONTROL SYSTEM

An intelligent network based lighting control solution that incorporates communication
between various system inputs and outputs related to lighting control with the use of one
or more central computing devices.
 Lighting controls
•
Stand-alone control of the lighting within a space, may include occupancy
sensors, relays, photocells, touch screens
 Automated Control
•
Chronological time (time of day)
•
Astronomical time (sunrise/sunset)
•
Occupancy using occupancy sensors
•
Daylight availability using photocells
•
Alarm conditions
•
Program logic (combination of events)

11. MAINTENANCE & APPLICATIONS
 Since the system is computerized, it is easy to maintain and regulate or control.
 Installation is very complex and cost effective.
 Ease of information availability problem.
 Computerized maintenance scheduling.
 Effective use of maintenance staff.
 Early detection of problems.
 More satisfied occupants.
 System integration.
 Energy saving.

12. REFERENCES
 http://en.wikipedia.org/wiki/Building_management_system
 http://en.wikipedia.org/wiki/Lighting_control_system
 http://www.facilitiesnet.com/lighting/tip/Lighting-Systems-SixMaintenance-Tips--21421#
 http://en.wikipedia.org/wiki/Building_automation
 http://en.wikipedia.org/wiki/LonWorks
 http://en.wikipedia.org/wiki/BACnet
 http:// en.wikipedia.org/wiki/Modbus