Chapter 5: Communication; Communication Overview; Interface; Sending Commands - NCR 7197 II SERIES Owner's Manual

7197 Series II Owner's Manual

Chapter 5: Communication

Communication Overview

In order for a receipt to be printed, a program must be in place that translates the data
from the host computer into a language that the printer can understand. This program
must tell the printer exactly how to print each character. This chapter describes how to
create such a program or modify an existing one.

Interface

In order for the printer to communicate with the host, a communication link must be set
up. The 7197 Series II Standard Model supports the industry standard RS-232C
communication interface. This interface has a protocol associated with it that the host
computer must understand and adhere. The priner also supports USB communications.
Only when the interface parameters are matched and the proper protocol is used will the
host and the printer be able to communicate. See the section, "RS-232C Interface" on the
next page for a description of the protocol associated with the RS-232C interface.
The 7197 Series II Ethernet Model supports the Ethernet communication interface.

Sending Commands

Once the communication link is established, commands can be sent to the printer. This
section describes how to send commands to the printer using DOS and BASIC. This
section does not take into account the necessary protocol, but is meant as a general
introduction to how the printer functions.
Using DOS to Send Commands
One way of getting commands to the printer is to send them directly from DOS. For
example, the command
COPY CON: COM1:
This sets the computer up such that the Hex code corresponding to any key that was
pressed would be sent to the RS-232C communication port COM1 when the COPY mode
is exited. If the printer is connected to COM1, then the data will go to the printer.
Exit the COPY mode by typing
CTRL Z
and then pressing the ENTER key. This directs the data from any print command to the
proper port, commands can be sent from any software program.
32 August 2011
Chapter 5: Communication