3. MODBUS function: you can use the upper computer software to set or collect data. 2. Analog signals of voltage and current can be measured and output at the same time. 4. MODBUS function: can communicate with computer, PLC, DCS, intelligent meter and other devices. 1. This the signal generator and the version with MODBUS function. 5. High , wide range of applications, stable and efficient performance, real-time display on the same color screen, easy to operate.