Ethernet Communication Module IFD9506 4. Stop Item: The stop item of data. Range: 1 ~ 3 When the start item and stop item are set, IFD9506 will transmit data following the start item and stop item. If the transmission time exceeds the Modbus time-out, IFD9506 will dispose of Note: incomplete data. When using two IFD9506 modules as Mater and Slave and its user define functions, the settings of the fixed length, start item and stop item have to be consistent. If not, the data will be filtered automatically. 8.8 Virtual COM Virtual COM converts the data transmitted to RS-232 to Ethernet. „ Select “User Define COM”. „ Switch to “User Define” page and “Listen Port”. DVP-PLC Application Manual 26