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What is Building Management System

 

What is Building Management System

Introduction.

Building Management System or BMS is normally used in a high rise building that has number of MEP equipment’s like chillers, AHUs, VAV, Lightings, Electrical panel, pumps, Firefighting equipment’s, etc. It becomes very difficult to operate, maintain and commission all of them physically and would require a huge man power resource.  Which increases the cost burden on the owner. The HVAC components are responsible for maintaining the human comfort of the building, the chillers should maintain the temperature of the supplying water at a certain degree Celsius so as to maintain the human comfort at the desired level. All the above mentioned equipment's should be well coordinated to achieve maximum efficiency and functionality.

 Without a well coordinated system. The efficiency would be at stake. The technicians and the field working team wont know which equipment has stopped working and need a replacement or repair in order to function at its utmost efficiency.

In such condition a Building Management System(BMS) comes into picture. Also known as Building Automation System(BAS). It is a computer based control system that controls and monitors buildings Mechanical, Electrical, Plumbing, Firefighting, Security system equipment's all from a single room. Which makes it easier to identify the problems.

Building Management Systems are most commonly implemented in large projects with extensive mechanical, electrical, hvac systems. All this systems are linked to BMS which use a large amount of energy. BMS systems are a critical components to manage energy demands. Improper configuration can lead to energy wastage.


There are 3 major levels 

1.      1.       Field Level = here all the equipment's like sensors, actuators, valves, thermostats are included it holds the important level in BMS system. As the actions taken by the BMS systems is totally dependent on the inputs from this field devices.

 

2.      2.   Automation Level = it has compact modules with programmable PLC , relays, ddc panels, etc. it takes the input from the field devices and maintain the occupant comfort as per the set points.

 

 

3.     3.  Management Level = here the working of all the major equipment's are represented in a graphical format. It displays all the information taken from the field level. Use to control and monitor the equipment's from the single room through PCs or HMIs.

bms-system.com
Image Source - Google | Image by - bms-system.com





The field devices are hardwired to the ddc panel, the ddc panels which includes the plc are connected to BACnet ethernet cable. The automation levels are connected to BMS levels via BACnet IP protocol.

Communication used in BMS  

BACnet = stands for Building Automation Control network. It is developed by ashrae. The main objective was to achieve interoperability between building systems from different manufacturers.

LONWORKS = Local Operating Network, it is the 2nd widely used protocol created by echelon corp in 1988. Designed to work on a low bandwidth, for networking devices through power lines, fiber optics, and other media.

Modbus = Modbus is a serial communication protocol developed by Modicon published by Modicon® in 1979 for use with its programmable logic controllers (PLCs). In simple terms, it is a method used for transmitting information over serial lines between electronic devices. The device requesting the information is called the Modbus Master and the devices supplying information are Modbus Slaves.

 

Advantages of BMS

  1.        Simple user interface = it provides a simple interface with all the operating values and inner components which makes it easier to control and monitor the equipment's from one place.

2.             2. Alarm management = it provide minor and major alarms for hvac equipment's, smoke detection, lighting which helps in exactly identifying the device wanting repair or replacement.

3.          3.  Timely scheduling = we can schedule the operation of equipment's to run for a particular time based on the human occupancy in the particular area.































































































































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Comments

  1. Alim AnsariApril 30, 2021 at 7:37 AM

    Thank you for this informative content.

    ReplyDelete
  2. UnknownJune 3, 2021 at 8:18 PM

    Thank you for sharing the informative and fundamental content.

    ReplyDelete

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