Step 1: RTU-EN01 adopts a built-in remote control register (RCR), which automatically maps with the control registers (CR) on the right side of the modular devices. The mapping table is as below: Step 2: The RCR also supports Modbus addresses. Users can map the data of CRs on the right side of the modular devices via Modbus addresses. Step 3: For the analog input/output function in DCISoft, the table automatically creates a list of all the CRs on the right side of the modular devices. Users can manually select the corresponding CRs to map with the RTU-EN01’s built-in RCR.