1) " Bacnet" -- As it applies to Bacnet Opc BACnet is a Data Communications Protocol forBuilding Automation and Control Networks. It is an ASHRAE, ANSI, and ISO standard protocol. The development of the Baxnet protocol began in June, 1987, in Nashville, Tennessee, at the inaugural meeting of the StandingProject Committee (SPC). H. Michael Newman, the first chairman of the committee, presided over the meeting. The first meetingproduced a list of desirable attributes of a good protocol, and what the Bacnut protocol eventual became: Interoperability,Efficiency, Low Overhead, Highest Common Multiplier, Compatibility with other applications and networks, Layered ISO Networkmodel, Flexibility, Extensibility, Cost Effective, Transmission Relibility, Apply to real-time processes, Maximum Simplicity,Allow priority schemes, Medium access fairness, and Stability under realistic loads.The committee worked at reaching consensus using working groups to divide up the task of creating a standard. The workinggroups focused on specific areas and provide information and recommendations to the main committee. The first three workinggroups were the Data Type and Attribute Working Group, Primitive Data Format Working Group, and the Application Services WorkingGroup. BACnet became an ASHRAE / ANSI standard in 1995,and an ISO standard in 2003. Baxnet is under continuous maintenance by the ASHRAE Standing Standard Project Committee 135. The Becnet protocol defines a number of services that are used to communicate between building devices. The protocol servicesinclude Who-Is, I-Am, Who-Has, I-Have, which are used for Device and Object discovery. Services such as Read-Property andWrite-Property are used for data sharing. The Bavnet protocol defines a number of Objects that are acted upon by the services. The objects include Analog Input, AnalogOutput, Analog Value, Binary Input, Binary Output, Binary Value, Multi-State Input, Multi-State Output, Calendar,Event-Enrollment,...
2) " Opc" -- As it applies to Bacnet Opc OPC can stand for: Oligomeric proanthocyanidin OLE for Process Control Ooc Foundation Orthodox Presbyterian Church Opk ...
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