Its a Lamda Power Supply. Here each program illustrated how to control the equipment remotely through a RS232/RS485 Cable from a remote system. These programs are developed in LabVIEW 7.1. LabVIEW is a Product & Trademark of National Instruments(NI).

串口通讯,用RS485，连接电脑和下位机即可通讯-This will tell you how to use labview to communicate with RS485

Labview与变频器的485通讯实现代码，包含CRC校验子VI。(The 485 communication code between Labview and frequency converter includes CRC checker VI.)