Building Management System allows control and management of all technical systems in the building such as electrical system, domestic water supply system, air conditioning, ventilation, environmental warning, safety security, fire alarm - fire fighting etc..., ensuring the correct and timely operation of equipment in the building.
Introduction of standard BMS system:
BMS building management system is designed according to layered control model. A BMS system is usually designed according to a 4-layer model:
+ Field class.
+ Control class.
+ Supervisory operation class.
+ Management class.
School equipment
Devices such as sensors: sensors for heat, light, motion, infrared... actuators: air conditioners, ventilation fans, elevators... field controllers for direct communication contact areas with joystick applications. Field devices can communicate with each other on their own, or through a local controller. The sensor will send parameters of the system, of the environment to the controller. The controller will process that message and send it to the actuator. The actuator can immediately receive requests from the sensors, or from the BMS system.
Control block
Connecting from the control center to the control level of the applications in the building through the BAS control cable with the BACnet TCP/IP interface, including DDCs (Digital Direct Controller), Units local and regional control, interfaces to ancillary systems such as: air conditioning, fire alarm, fire fighting, electrical systems, etc.
Control block with function
- The control block receives commands from the supervisory operator block and sends it to the actuator.
- Process messages when required locally.
- Send messages and results to the supervisory operation block.
Supervisory Operation Block (SCADA)
The control center, the management level includes data server systems, workstations installed with maintenance management software, printers and computers for programming and system configuration. It has the main function:
– Manage the entire building
- Monitor the operation of equipment, monitor the occurrence of incidents.
– Send a request to the field controller. The BMS manages the building system components according to the addressing mechanism. Each device, local controller is assigned an address. Field devices can communicate directly with each other or via the local controller. The interface commonly used on the field bus is ARCnet and on the control bus is BACnet TCP/IP. An advantage when integrating the system is that field devices such as elevators, air conditioners, fans, etc. all support TCP/IP communication. Very convenient for the system integrator.
Management block
This block is actually installed in the supervisory operation block. Its main function is to set the work plan. Remote operation connection via telecommunications network, internet... For example: When we need a meeting room for 100 people at X hours, Y day, month Z. Administrator can find and assign it by himself or type commands to the machine. find yourself. At that time, the monitoring operation system will automatically send control commands including: Time to open the meeting room, turn on the lights, air conditioning, ventilation ... before a certain set time. The lighting in the room is defaulted to the meeting room. When requesting a living room, there will be a living room with its space… For the purpose of bringing comfort to users, saving energy, reducing human operation for equipment in the building. Currently, BMS control software is perfectly integrated with other supporting devices such as: Video conference systems, network control and monitoring, handheld PDAs...
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Benefits that a building management system (BMS) brings:
Ensure security and confidentiality
The monitoring and control system when accessing the BMS system will have a closer relationship and better security than other components in the building, with more support and additional functions.
Energy saving
BMS monitors daily energy usage. Automatically turn the system on and off according to the presets and give an alert if the power consumption is too high. Control the power system on and off when there is a problem, start the lighting system when there is an unauthorized break-in. It is possible to accurately determine the capacity of the air conditioner to each room, each area. Convenient for office buildings for rent, when in one floor there are many offices rented by many different companies, but using a centralized air conditioner.
Operation support
The BMS system automatically controls the actuators according to pre-set scenarios.
For example: When there is a fire on the 5th floor of the building, the auxiliary equipment for fire alarm will be activated, specifically: Fire fighting system automatically activates, the ventilation system stops supplying gas. Freshen and suck the air in the floor out of the 5th floor. Unnecessary electrical equipment is disconnected from the electrical system. The access control system is turned off, the elevator system will bring the ladders to the 5th floor, the pressure pump for the stairs is started, to assist in moving people out of the 5th floor.
By the intuitive interface at the control center, operation engineers can reset parameters for actuators, control devices, and sensors.
The location of the equipment and its operating status are shown visually on the operating and monitoring screen, the operator can recognize the operating status, the problems occurring to the equipment and the whole system.
Support maintenance.
The BMS system can monitor the operating status of all or important equipment in the building and automatically warn when it detects abnormalities in the system. Automatic warning, request when needing maintenance. The BMS monitors the operating status of the backup devices, ensuring the operational readiness of the equipment.
Services of BMS system:
BMS (building management system) service was born to serve the needs of managing buildings in the most economical and intelligent way. The equipment in the building is divided into the following main systems:
- Power system.
- Air conditioning, ventilation and heating (HVAC) systems.
- Lighting systems.
- Fire alarm system.
- Water supply and drainage system.
- Access control system.
- Security monitoring system.
- Elevator system.
- Communication systems…
The BMS solution provider will analyze the needs, functions, and relationships of these systems and offer the most suitable BMS service to optimize the operation and manipulation of the equipment, ensuring the optimal control. Stable, comfortable, convenient, suitable and safe working conditions for assets and data.