The properties of a port depend on the type of board installed in the I/O Server, and on the I/O Device connected to the port. Ports have the following properties:
A name for the port connected to your I/O Device(s). 31 characters maximum. Each port needs to have a unique name (i.e. you cannot assign the same Port Name to two ports in your system). You can use any name, for example: Board1_Port1
If you have more than one board in your computer, you can use the port name to identify the board, for example: Board2_Port1
The port number that the I/O Device is connected to. 4 characters maximum. Do not assign the same Port Number to two ports on a board, unless connecting to a dial-up remote I/O Device via a modem (see the note below). Ports on different boards can be assigned the same number.
If you are using your computer's COM port enter the port number here - the port number is defined in the Ports section of the Windows Control Panel.
Note: If you are connecting to a dial-up remote I/O Device (via a modem), you need to define a unique port name on the I/O Server for each dial-up remote I/O Device, and the port number needs to be -1 for each.
The name you used for the board. 16 characters maximum. This is necessary to link the port to the board. For example Server1_Board1
The baud rateThe number of times per second a signal changes in a communication channel. While the baud rate directly affects the speed of data transmission, the term is often erroneously used to describe the data transfer rate. The correct measure for the data rate is bits per second (bps). of the communication channel (between the CitectSCADA I/O Server and the I/O Device). 16 characters maximum.
Note: The I/O Device hardware and serial board may support other baud rates. If you do choose an alternative baud rate, verify that both the I/O Device and serial board support the new baud rate.
The number of data bits used in data transmission. You need to set your I/O Device to the same value or a communication link cannot be established.
The number of stop bits used to signify the completion of the communication. You need to set your I/O Device to the same value.
The data parityA communications error-checking procedure. The number of 1's must be the same (even or odd) for each group of bits transmitted without error. used in data transmission.
Any special options supported by the port. 32 characters maximum. Please check the Hardware Setup Help Topic for your specific I/O Device to see if specific options are necessary.
Any useful comment. 48 characters maximum.