concom.htm

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<title>Connecting with a serial device</title>
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<blockquote>
    <p align="left"><strong>Connecting with a serial device </strong></p>
    <p align="left">Click <strong>Add</strong> button and
    cofigure the serial port characteristics (Com used, baudrate,
    parity...).</p>
    <p align="left"><img src="images/Compar.gif" width="410"
    height="334"></p>
    <p align="center">Fig. 3 - Com port parameters.</p>
    <p align="left"><strong>Port</strong>-serial port com1 to
    com8 <br>
    <strong>BaudRate</strong>-Specifies the baud rate<br>
    <strong>Stop Bits</strong> - Specifies the number of stop
    bits to be used. Use 1 stop bit if parity is used and 2 bits
    if no parity.<br>
    <strong>Parity</strong> - Specifies the parity scheme to be
    used. <br>
    <strong>Time-out</strong> - Time-out period for slave
    response in ms.<br>
    <font size="3"><strong>SilentInterval -</strong></font>Silent
    interval marking the begin and the end of a message in ms.
    RTU messages start and end with a silent interval of at least
    3.5 character times. For instance , for baud rate of 9600 bps
    silent interval is 4 ms , but when doing some pratical tests
    this value was incresed to 20 ms for correct communication
    with devices, try to increase this value if you get many
    communication errors.When using ASCII set silent interval 500
    or 1000 ms. <br>
    <strong>Flow</strong> - Specifies the flow control. <br>
    <strong>Transmission Mode</strong>-Modbus use either of two
    transmission modes: ASCII or RTU.</p>
    <p align="left">For a first test leave DCOM|Server empty and
    uncheck the option Enable TCP Server. Click Ok and if not
    occur an error you see new connection in the list.</p>
    <p align="left">Back to <a href="client.htm">Modbus
    Automation Client</a></p>
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