CAJ | 학술논문

针对全部无线化工厂通信系统成本高、时间紧等困难,利用WIA-PA技术和Modbus协议互联的透明传输思想对主从设备中的原数据帧进行无线传输。主机设备在原有Modbus主站的基础上连接无线网关；从机设备使用无线模块,针对模块用户应用接口的特点对数据包进行封装；通信采用主从方式,主机通过地址映射表寻找从机。结果表明,Modbus协议可在WIA-PA上实现异步串行通信。以无线温度变送器和无线Modbus主站通信为例,验证了方案的可行性和准确性。
침대전부무선화공엄통신계통성본고、시간긴등곤난,이용WIA-PA기술화Modbus협의호련적투명전수사상대주종설비중적원수거정진행무선전수。주궤설비재원유Modbus주참적기출상련접무선망관；종궤설비사용무선모괴,침대모괴용호응용접구적특점대수거포진행봉장；통신채용주종방식,주궤통과지지영사표심조종궤。결과표명,Modbus협의가재WIA-PA상실현이보천행통신。이무선온도변송기화무선Modbus주참통신위례,험증료방안적가행성화준학성。
Implementing entire wireless communication system in chemical plant is difficult because of the high cost and tight schedule, thus the transparent transmission based on WIA-PA technology and Modbus protocol is adopted to realize wireless transmission of data frames in master and slave devices. The master device is constructed on original Modbus master station and connected to wireless gateway; the slave device is using wireless module, in accordance with the features of user application interface of module, the data packet is packaged; the master-slave mode pattern communication is used, the master device finds slave device via address mapping table. The result indicates that Modbus asynchronous serial communication can be implemented in WIA-PA. With communication between wireless temperature transmitter and wireless Modbus master station as example, the feasibility and correctness of the strategy is verified.