MbusSerialMasterProtocol.openProtocol Method ()

Opens a serial Modbus protocol and the associated serial port with the port parameters configured via properties

[Visual Basic]
Overloads Public Function openProtocol() As Integer

[C#]
public int openProtocol();

BusProtocolErrors.FTALK_SUCCESS on success or error code. See BusProtocolErrors for possible error codes.

This function opens the serial port. After a port has been opened, data and control functions can be used.