摘要
1) Communication Object Classific ation: The BACnet device is regarded as a combination of different objects based on different functions because devices consist of objects in the BACnet protocol. In this paper,the BACnet device is defined as a destination device that issues or communicates requests and the source device implements the request or replies to the request. There are three standard objects related to communication in the source device: the analog input/digital input(AI/DI) object, the device object, and the source object. The AI/DI object is used to input the analog/digital information and communicate with the control element.
