Communications
PcOS Series 90PLUS
Programmer's Guide
Overview
Page 128
Rev Q
11/07/05
8
Communication Protocol and Print Buffers
8.1
Overview
The following figure illustrates the communication flow from host computer to printer and from printer to cash
drawer.
Host computer
Printer to cash
drawer
Host to printer link
Cash drawer
Keypad
Host to
keypad
Printer
Figure 21 Typical POS system
For the host to printer communication link, the Series 90PLUS Printer supports serial or parallel
communications. The serial and parallel ports both follow standards developed for the PC environment.
Host computer
Data to printer
Status and flow control back
Printer
Figure 22 Host to printer link
Содержание Ithaca 90PLUS Series
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