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After a comm. Port is selected the above screen is displayed. This program
allows for simple command entry and provides the programmer a detailed view of
both the characters sent and the data received from the printer.
Commands to be sent to the printer are typed in first text box labeled
“COMMAND TO BE SENT TO PRINTER”. Since windows does not display
ASCII control characters, and often interprets these control characters to have
special meaning data entry for the special characters are in the form of icons on
the screen. The second line of the display shows 6 gray-scaled boxes. The first 4
boxes represent the ESC, STX, ETX and EOT ASCII control characters. The
“CLEAR SEND COMMAND’ is intended to clear the first line text box. Of course
any other windows erasing method will work. Finally the last box “SEND
COMMAND” actually sends the command typed into the first line to the printer.
To enter a command string the user must follow the correct sequence. All
command structures sent to a printer must start with the ESC character so select
the ESC gray scaled box. Next select the STX box and then place the cursor in
the command text box following the second character, which was the STX.
After the cursor is placed in the command text box it is necessary to enter the
unit ID (device address) of the printer. For initial test purposes use the factory
default setting. This default address is 01 and should be typed in the command
box following the STX. The required command follows the address. Selecting the
ETX box followed by the EOT box ends the command string. Select the “SEND
COMMAND” button to send the command to the printer.
When the “SEND COMMAND” button is selected the second text line displays
the hex values of the message sent to the printer. In this case the ASCII
character ! (Exclamation Point) was sent to the printer. This command requests
the printer to respond with the software version of the system.
For convenience the third text line displays all the ASCII control codes with the
hex values above them.
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EVOLUTION LX SYSTEM MANUAL Issue 1.0 5 DEC 2009