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IndexHistory of controlsBas- definitionWhats basWhy basComponents of basHvacHigh sideLow side controlsControl logicsSystem architectureSensorsControllersSoftwareWebcontrolsProtocols and communication interfacesBasic designingWhat to look for in executing a projectIO summaryController designSample exerciseQ&A
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Control system
Definition
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Control schematic
Control System
Feedback
Input Output
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Whats controls ?
The intelligence behind themechanical systems
Its like the human mind whichprocesses millions of inputs everyminuteHuman brain is the oldest and bestcontrol system
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History of controls ?
Electrical controls- 1970s Electronic discrete controls- 1980s
Digital controls - 1990s Open protocol controls- 2000
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Why BMS ?
To provide one point monitoring andcontrol of all utilities and integrationwith Fire life safety systems to offerprecision control, automation, safetylockouts, energy savings and betterinformation systems
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Benefits
Precision controlAutomatic operations
Safety InterlockEnergy savingsBetter Maintenance management
Good Information Systems
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Sub-systems of BASEnergy management systems
HVACElectrical
LightingMisc utilities like hydrant, water systems
Fire life safety systemsFire detection systemsAccess control systemsCCTV systemsPerimeter protection systems
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FeaturesHVACMonitor and control high side equipment including chillerthrough integration on Modbus/Bacnet for trending ofparameters
Monitoring and control of Pumps and other associatedequipment for High sideMonitoring and control of RA temp , control of AHU controlvalve, on/off operations in time schedule programs,monitorfilter clean/dirty conditions, control of VFD if provided,firestatus integration, fire damper control if motorized and
monitoring the IAQ parameters for each level in 2 locations.Monitoring of CO levels in basement and control of fans inthe basement for ventilation and exhaust.Integration of precision air conditioner for serverroom/switch/hub/IDF rooms
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FeaturesElectricalMonitor transformer temperatures andtrips, breaker status ,monitor various
parameters like V, A, PF, Freq for incomerand various important outgoing feedersIntegration of DG PLC and monitoringcritical engine and alternator parameters
Integration of UPS for monitoring all criticalparameters
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Features
LightingControl of lighting in general office
areas based on time schedule andoccupancy override facility withintegration to the EPABX system.Control of lights externally based onlux levels , time schedule programs
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Features
Plumbing, Sanitary & Fire fightingMonitoring and control of levels in
various tanks and control of pumpsTime schedule control for landscapepumpsMonitoring main pumps, jockeypumps, Engine driven pumps
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Proposed Design
System Architecture based on TCP/IPwith 2 layers of architecture controllers and Head end based onIndustry standard open protocol likeModBus/BacnetSystem covering the following
- HVAC- Lighting internal Workstations/Architectural- Electrical utilities like power measurement, breakers- Indoor air quality- Misc Equipments like pumps , levels etc.
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Proposed design
Integration with following equipmenton Bacnet or Modbus
Fire detection Panels
DGs UPSBreakersVFDs Precision AC UnitsChillers
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Proposed designMaintenance Management software for pro-activemaintenance and Facility ManagementMulti-user software with facility to monitor andoperate from multiple workstationsHi-speed controllers with freely programmingcapabilityBMS Network integrated with facility wide LANWeb based capability using IP address for multi-
location monitoring and control- for e.g from UKSMS Based alarming utility for messaging of keyalarms to a mobile phone and facility to escalate
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Components of BAS
Input devicesOutput devices
ControllersHead end Workstation
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Input DevicesTypesAnalog Input- Any input that varies withtime for e.g. Temperature, humidity ,
PressureDigital Input- Any input that works on atwo state mode ( 0 or 1)like on or off ,clean/dirty.
Pulse input- Any input incremental innature and totalizes over a period of time ,KWH meter, water meter
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Controllers
Microprocessor based with real timeclock and memory
Programmable for various controllogics and switching tablesCapability to communicate with othercontrollers on communicationprotocolStand alone operations
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Output devices
TypesAnalog output- output that varies
with time e.g 3 way valve , VFDDigital out put- on/off output e.g fanon/off , compressor on/off
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System Architecture drawing
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BACtalk Visual Logic ControllersCapable 10-bit universal inputsInteroperable Fully BACnet-compliant
on MS/TP LAN at up to 76.8 Kbps.Fast Internal logic loop of 100 msec.
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Visual Logic Controllers
Reliable Extensive onboard filtering,with all program data backed up innon-volatile EEPROM.
Versatile Fully programmable forcentral plant systems, air handlingunits, clean rooms, fume hoods andother control and process equipment.
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VLC 16160IC316 Universal Inputs16 Binary Outputsgrouped into 4 groups of
four binary triacoutputs, each with anisolated power source,making it ideal forcontrol of packagedequipment
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VLC 1600C3
16 UniversalInputs
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Visual Logic Programming
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FeaturesHVACMonitor and control high side equipment including chillerthrough integration on Modbus/Bacnet for trending ofparameters
Monitoring and control of Pumps and other associatedequipment for High sideMonitoring and control of RA temp , control of AHU controlvalve, on/off operations in time schedule programs,monitorfilter clean/dirty conditions, control of VFD if provided,firestatus integration, fire damper control if motorized and
monitoring the IAQ parameters for each level in 2 locations.Monitoring of CO levels in basement and control of fans inthe basement for ventilation and exhaust.Integration of precision air conditioner for serverroom/switch/hub/IDF rooms
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FeaturesElectricalMonitor transformer temperatures andtrips, breaker status ,monitor various
parameters like V, A, PF, Freq for incomerand various important outgoing feedersIntegration of DG PLC and monitoringcritical engine and alternator parameters
Integration of UPS for monitoring all criticalparameters
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Features
LightingControl of lighting in general officeareas based on time schedule andoccupancy override facility withintegration to the EPABX system.Control of lights externally based onlux levels , time schedule programs
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Features
Plumbing, Sanitary & Fire fightingMonitoring and control of levels invarious tanks and control of pumpsTime schedule control for landscapepumpsMonitoring main pumps, jockeypumps, Engine driven pumps
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Proposed Design
System Architecture based on TCP/IPwith 2 layers of architecture controllers and Head end based onIndustry standard open protocol likeModBus/BacnetSystem covering the following
- HVAC- Lighting internal Workstations/Architectural- Electrical utilities like power measurement, breakers- Indoor air quality- Misc Equipments like pumps , levels etc.
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Proposed design
Integration with following equipmenton Bacnet or Modbus
Fire detection Panels
DGs UPSBreakersVFDs Precision AC UnitsChillers
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Proposed designMaintenance Management software for pro-activemaintenance and Facility ManagementMulti-user software with facility to monitor andoperate from multiple workstationsHi-speed controllers with freely programmingcapabilityBMS Network integrated with facility wide LANWeb based capability using IP address for multi-
location monitoring and control- for e.g from UKSMS Based alarming utility for messaging of keyalarms to a mobile phone and facility to escalate
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Standards
UL 817NFPA 72e
IS2189UL 865UL 555
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What is Web enabled BASA BAS which utilizes the internet to providereal-time access to building personnel tomonitor ,control with necessary web servers,front end software's and a static IP addressInternet control goes beyond the simpleaccess. Internet control automates facilitiesHVAC and processes while expanding thescope to enterprise level,thus converting BASto MIS
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Internet and BASA Web based presentation of dynamicbuilding information allows not onlyoperators to operate from anywhere with fullfunctionality , it allows interaction withcontractors, consultants, equipmentsuppliers to provide feed forwardinformation to the building operation matrixIt provides upper management with bottomline oriented screens to provide dynamicproof of the success or failure of buildingperformance
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Internet based BAS
What has helped is the standardization ofdata communications like TCP/IPIt is the convergence of IT and BAS
Web based training for operating staffResource library for the buildingMultiple locations open system help inintegrationHTML for dynamic data
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AdvantagesStandard web browser like IE or NN as ainterfaceNo proprietary software required
High level of securityNo multiple copies of s/w requiredUnlimited usersCompanies with multi-locations facilities
Unifies users , consultants , contractors tostudy the system performance and fine tune
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Building.com
The concept of creating a website foreach complex allows all criticalbuilding information to be located inone organized place for all concernedto access.
The website is a focus point for energy
performance,client comfort andcomplaints.
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Building.comMany large buildings have a .com addressVery powerful and almost becoming a standard in USReal-time streaming video data to show constructionprogress
Helps bidding process all relevant drawings,documents for owners, bidders, consultants availableon the web siteLarge buildings can sell internet access by leasing ISDNlines/ T1 connects and distributing to many users
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Building.com
Buildings could sell e-mail ID , serverspaceIt allows a transparent system for tenant
billing systemsEmergency breakdown communications,shutdowns, special security proceduresAccess to real time temp, IAQ data.,
virtual thermostats and lighting interfacesIt is a building operations andmaintenance tool
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WEBtalk
Access your building using anInternet browser
Increase building managementefficiency
Ease to use, install,maintain
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The End
End of session 1Session 2- BMS sample designexercise
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