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Programmer's Guide PcOS Series 150 Communications
Overview
12/14/99 Rev G Page 107
Chapter 10:
Communications Protocol and Print
Buffers
Overview
The following figure illustrates the communication flow from the host computer to the printer and
from the printer to the cash drawer.
Host
computer
Printer to cash
drawer
Host to printer link
Cash
drawer Keypad
Host to
keypad
Printer
Figure 15 Typical POS system
For the host to printer communication link, the Series 150 Printer supports serial or parallel
communications. The serial and parallel port both follow standards developed for the personal
computer environment.
Host
Computer
Data to printer
Status and flow control back
Printer
Figure 16 Host to printer link