HP 7470A Interfacing And Programming Manual page 145

terminal through a separate port, rather than through the plotter. This
is sometimes referred to as an endline or stand-alone environment.
Diagrams of this type of system for both large and personal computers
are shown below, along with a picture of the rear panel connection.
COMPUTER SYSTEM DIAGRAM
PLOTTER
TERMINAL
. . K/A
cowurzn MAINFRAME
' I PLOTTER
Eu
f
/' E
PERSONAL COMPUTERS
REAR PANEL CONNECTIONS
HS-232-C CABLE g
SUPPLIED BYUSEF1?%/
I/I
R
POWER CORD
Plotter Connection with a Computer Mainframe or Personal Computer
Operation
Operation with this type of installation is usually confined to the on­
line, programmed-on state. The rear panel switch labeled Y/Dshould be
set to D (direct). When the switch is set to D, whenever power is being
applied to the plotter, it is in the on—line, programmed-on state. In this
state, the plotter reacts to all device control and HP-GL instructions
except the plotter off instruction. It is not possible to programmatically
turn the plotter off. Only when the switch is set to Ymay the plotter be
RS-232-C/CCITT V.24INTERFACING 10-3