Design of a Multifunctional CAN Bus Controller for a Ground Source Heat Pump System

摘要

In order to realize the data acquisition of field instruments, device control and data communication for GSHP (ground source heat pump) systems, a multi-functional CAN (Controller Area Network) bus controller is designed with a single-chip STC12C5A60S2 microcomputer as the core. The controller makes CAN communication, wireless communication and communication conversion from RS-485 to CAN possible. Moreover, data acquisition and control modules are designed, which include an A/D (Analog/Digital) converter module, a D/A (Digital/Analog) converter module and a DI/DO (Digital Input/Digital Output) module. Testing of the controller indicates that it has strong adaptability and flexibility. Therefore, this controller meets the different data acquisition and control needs for GSHP systems.