Worth Data 5000 TriCoder s Especificaciones descargar pdf (Pagina 13)

Serial readers can be placed several hundred feet from the computer, (keyboard

wedge readers cannot be placed beyond 10 feet.)

Also multiple serial readers can be attached to the same computer, (keyboard

wedge readers cannot). The PC runs a program to poll the readers one at a time,

thus avoiding the “mish-mash” of data from multiple readers.

Mainframe Bar Code Readers

Mainframe computers often have terminals with unique data connectors and data

formats, (different from ASCII or PC key codes). The IBM System 36-38,

AS/400, 4300, 9000, etc., have such terminals. To use bar codes with these

computer systems, you must use a keyboard wedge reader specifically designed

for the terminal to be attached to. Vendors such as Compsee, Intermec and Hand

Held Products specialize in readers that attach to mainframe terminals.

The alternative is to have a PC with a terminal emulation card in it attached to

the mainframe; then a less expensive PC bar code reader and laser printer can be

used on the PC.

Portable Readers

Portable readers are handheld battery operated readers that store the data in

memory for later uploading. In addition to a bar code scanner, a portable reader

usually has an LCD display to prompt the user what to do; and they usually have

a keyboard to enter variable data such as quantities. Ease of programmability is

a key issue in selecting a portable, and that depends on your programming

abilities; lots of vendors say it's easy, (as long as you can program in C++ or go

to their two week school). Other variables to consider are: battery life (at least

20,000 scans), ease of reading the display, size/weight of the unit, who repairs it,

and where it is to be repaired in the event of a malfunction.

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Worth Data 5000 TriCoder s Especificaciones Pagina 13