Silex technology SX-550, Developer'S Reference Manual

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After the Serial Port Emulator software has started, you will see a list of all the configured SX-550s on the
network. Right click on the name of the SX-550 that you want the virtual COM port to connect to (the
default name is SDS
xxxxxx , where xxxxxx is the last six digits of the SX-550 MAC address), and then
click Virtual Port . You will be asked to select the name of the virtual COM port (for example, COM3).
The Advanced button allows you to select RFC 2217 support (see RFC 2217 section below) or strict baud
rate emulation (the SPE normally transfers data at the maximum network speed for best performance; the
strict baud rate feature forces the data rate to run at the actual baud rate without buffering for compatibility
with older application programs that have strict timing requirements).
Click OK after you have selected the name, and you now ready to use the virtual COM port.
Using virtual COM port is identical to using a normal COM port. For example, if you configure a virtual
COM port called COM3, this port will show up as one of the available serial ports when you use the
Windows HyperTerminal Accessory program.
Raw TCP connection
You can communicate directly from your application program to the SX-550 using a raw TCP connection.
This is done by opening a TCP port on the SX-550 and then sending and receiving data to this port via a
socket or equivalent API. This method is more efficient than using the Serial Port Emulator, and does not
require any additional software to be installed on your computer.
If you are using a raw TCP connection, the default TCP port number is either 9100 or 3001 for Serial Port
1 or 9101 or 3002 for Serial Port 2 (you can use any or all of these port numbers) for normal connections.
If you want to be able to access your device’s modem control signals from your computer system, then
the TCP port number is 9200 for Serial Port 1 or 9201 for Serial Port 2 (this enables RFC 2217 support).
You can change the port number, if desired, by modifying one of the SX-550 services. To change the
TCP port number:
1. Connect to the SX-550 with a web browser (see chapter 3 for instructions on doing this);
2. After you have logged in, click
I/O Services on the left side of the page.
3. Click on the service name that you want to change (any one of the services is OK, provided that
you are not using the existing TCP port number of that service for a different application).
4. Change the Raw TCP Port to the desired number (must be greater than 1023).
5. Click Submit to save your change.
Part Number 40183-101 Silex SX-550 Developer's Guide Page 35