CAJ | 학술논문

针对分布式测控系统中以数据采集需求为主的场合，提出了一种基于Modbus协议和FPGA的通用数据采集装置设计方案。该数据采集装置由多通道模数转换器、FPGA主控芯片、RS485转换芯片、隔离电路等组成， FPGA负责对Modbus协议进行解码和编码，并根据系统主机的配置信息控制模数转换器的转换过程以及数字量I／O口的输入输出。实际使用表明，该装置具有结构简单、组网方便和稳定性及兼容性好等优点，能很好地满足对成本敏感的分布式测控系统的需求。
침대분포식측공계통중이수거채집수구위주적장합，제출료일충기우Modbus협의화FPGA적통용수거채집장치설계방안。해수거채집장치유다통도모수전환기、FPGA주공심편、RS485전환심편、격리전로등조성， FPGA부책대Modbus협의진행해마화편마，병근거계통주궤적배치신식공제모수전환기적전환과정이급수자량I／O구적수입수출。실제사용표명，해장치구유결구간단、조망방편화은정성급겸용성호등우점，능흔호지만족대성본민감적분포식측공계통적수구。
For the data acquisition needs-based distributed control system,this paper proposed a general data acquisition de-vice based on Modbus protocol and FPGA.The data acquisition device consisted of multi-channel ADC,FPGA main control chips, RS485 converter chips,buffer circuits and so on.FPGA was responsible for decoding and encoding the Modbus protocol and con-trolling the conversion process of ADC and the input and output of digital I/O port based on the configuration information of the host.The test results show that the device has the advantages of simple structure,convenient networking,stability,good compatibili-ty and so on,thus meeting the demands for the cost-sensitive distributed measurement and control system.