The BACnet/IP protocol defines a number of services that are used to communicate between devices and the objects that are acted upon by those services.
|Application protocol data unit, that data portion of a BACnet message.
|A message for which the device expects an answer.
|COV, COV increment
|Change of value, sets the amount by which a value has to change in order for the meter to send a subscription notification.
|A BACnet device is a unit that is designed to understand and use BACnet protocol (for example, a BACnet-enabled meter or software program). It contains information about the device and device data in objects and object properties. Your meter is a BACnet device.
|Represents the device and device data. Each object has a type (for example, analog input or binary input) and has a number of properties.
|The current value of an object.
|The smallest piece of information in BACnet communications, it consists of a name, data type and value.
|Messages from one BACnet device to another.
|A relationship between a BACnet client and the meter, so that when the present value property of an object changes on the meter, a notification is sent to the client.
|The message the meter sends to indicate a COV event has occurred.
|A message for which the device does not expect an answer.
|BACnet Broadcast Management Device (BBMD)
|A BACnet/IP device (or software application) residing on a BACnet/IP subnet that forwards BACnet broadcast messages from devices on its subnet to peer BBMDs and registered foreign devices on other subnets.
|A BACnet/IP device (or software application) that resides on a remote IP subnet and registers with a BBMD to facilitate the sending and receiving of broadcast messages to/from devices accessible by the BBMD.