HP 7470A Operator's Manual page 14

2.
3.
�
:
Returning the paper loading lever to the
position turns off the
HOLD I
lowers the pinch wheels to secure the plotting
medium. This action also cancels any pend­
light blinking) due to having
ing error
(ERROR
received a move command with the pinch
wheels up.
This multi-purpose pushbuttori
ing the locations of scaling points PI or P2,
storing the currently held pen, resetting the
plotter to power-up default conditions, and
digitizing.
is
The enter function
the pushbutton must be pressed simul­
ENTER
taneously with one of the following push but­
tons to initiate the defined action:
a. When is pressed simultaneously with
ENTER
the or pushbutton, the current pen
P2
P1
location becomes the new PI or P2 scaling
point.
is pressed simultaneously with
b. When
ENTER
the or
LEFT (1) RIGHT (2)
plotter stores the pen currently held in the
pen holder into the selected pen stall, if
possible. The pen holder returns to its pre­
vious coordinate location.
c. Moving the paper loading lever to the
position and pressing
PAPER LOAD I
simultaneously with the
resets all power-up default conditions.
The digitize function
plotter receives the HP-GL command DP. If
then is pressed, the actual X- and Y­
ENTER
coordinates and the pen status (up or down)
are stored and will be sent to the computer
after receipt of the HP-GL command OD. In­
structions for digitizing are contained in the
Interfacing and Programming Manual.
Pressing or causes the plotter to raise
P1 P2
the pen and move it to the corresponding
physical point on the paper. On power-up,
scaling points PI and P2 are set to the coordi­
nates Plx 250, Ply
=
7479 plotter units.
=
PAPER
light and
ERROR
is
used for chang­
non-latching. This means
push button, the
ENTER
push button
VIEW
is
initiated when the
279, P2x 10 250, P2y
= =
9