Introduction - HP 7475a Operation And Interconnection Manual

Plotter Interconnection

Introduction

This interconnection guide is designed to help you connect the HP 7475A
Graphics Plotter to your computer and verify communication between
them.
IWad the general instructions in the following paragraphs, then locate
and use the interfacing instructions for the computer you are using.
Each instruction set lists a required minimum system confi g uration,
gives connection instructions for the hardware, and provides a short
program to verify that programming information is being sent cor·
rectly from the computer to the plotter. Once this has been verified, you
can use the Interfacing and Programming Manual to write your own
programs (refer to Accessories Available in Chapter
software package already written for your computer/plotter system.
If Your Computer Isn't Listed . . .
If your computer isn't listed, there is a good possibility that it still can
be interfaced to the HP 7475A. First, determine which kinds of commu­
nication interfaces are available for your computer. If your computer
supports an RS·232-C/CCITI Y.24 interface or an ANSVIEEE 488-
1978 (HP-IB) interface, then it probably can be interfaced to an
HP 7475A. IWad the manual that describes the communications eqnip­
ment for your computer, and then detennine how information is sent
and received. Next, refer to either Chapter 9 or 10 in the HP 7475A
Interfacing and Programming Manual (depending on which interface
you're using) to get a better understanding of how information is sent
and received by the plotter. In the RS-232·C environment, pay particular
attention to the cabling requirements between the computer and the
plotter. (Appendix A contains RS·232·C pin allocations and cable
schematics for Hewlett-Packard cables.) Then, choose a computer con·
figuration in this guide that appears similar to yours and use this as a
guideline for creating your own communication verification program.
Chapter
I),
or you can use a
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