El uso de Asia Control Technology Kingview combinado con la radio digital de la serie Ebyte E90 para realizar la adquisición remota y el control de PLC. La construcción del entorno de comunicación se presenta principalmente aquí, por lo que no se usa el programa de control demasiado complicado, pero para reflejar el efecto de control, usamos el sistema de iluminación más familiar como proyecto de prueba e introducimos un registro de espera para probar el condiciones de trabajo del código de función MODBUS 03.

La red de configuración utiliza el protocolo de interfaz MODBUS RTU de Modicon para conectar la radio digital E90 a través del puerto serie RS485 y utilizarla como host. El puerto serial No. 2 de Gumei CX3G-PLC (en lo sucesivo, PLC) se utiliza como esclavo MODBUS RTU para procesar los comandos de consulta y control de Kingview.

Use the seventh discrete input port (X06) of the PLC as the local control point for turning on the light, use the eighth discrete input port (X07) as the local control point for turning off the light, and use M2 as the remote control point for turning on the light. point, use M3 as the remote control point of Kingview lights off.
Use the second register (D8013) of the PLC special register to automatically assign value to the Kingview read register (D0).

There is generally a long distance between the central control room and the PLC control cabinet. The use of digital radio can reduce the time cost and construction cost of wiring and later fault inquiry, and also facilitate later function expansion. In addition, it has the following advantages.
1. It can solve the problem of long wiring construction period or even impossible to implement in environments that are difficult to wire (mountains, ports and open areas, etc.).
2. The distribution network is convenient and flexible, with good scalability. Device configuration can be achieved with little time cost.
3. Maintenance and fault inquiry are convenient and quick.
4. Multi-point control can be easily realized.
5. All RTU devices can be expanded in this way.