Chapter 3 PLC System Configuration & Settings 3.3.5.8 Ethernet - Advance: Data Exchange The CPU module of AH5x0-EN series contains the data exchange function based on MODBUS TCP. The built-in function is enabled by clicking the Ethernet - Advance tab on the top of the window, and the Data Exchange tab at the bottom of the window as below. If users open this page of the PLC Parameter Setting window for the first time, the table is blank due to no data set. A new row of data can be inserted by clicking Add . Double-click the data so that the data setting window is opened. 3-187