Worth Data 5000 TriCoder s Especificaciones descargar pdf (Pagina 12)

Serial Bar Code Readers

Another method of data transmission from the bar code reader to the computer is

by RS-232 Serial ASCII format. If you have a multi-user computer, (for

example a UNIX system), with serial ASCII terminals for each user, the bar

code reader can attach between the terminal and host computer, transmitting

ASCII data just like the terminal; in fact the bar code data looks just like

keyed data when attached like the following figure:

Single user computers without an external keyboard (most notebooks) must use

the serial port for interface of a bar code reader; to get the bar code data to

appear as keyed data, a TSR or device driver program is also necessary.

Typically requiring only 2K of RAM memory, the program takes data from the

COM port and places it into the keyboard data buffer, so bar code data appears

to have been keyed. If your computer program can read a serial port directly,

no additional program is necessary. Also, when adding a serial reader to a

laptop, notebook or palmtop, it is important to use a reader that does not draw

power from the computer itself. Worth Data has designed a serial interface laser

scanner that is battery operated, saving all of the laptop or notebooks’ battery

power for the operation of the laptop or notebook computer itself.

Battery-Operated

LZ200-WDR Reader

for Laptops and Notebooks

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Worth Data 5000 TriCoder s Especificaciones Pagina 12