HP 7475a, Operation And Interconnection Manual

Page: 35 / 101

3.
4.
2
3 4
5 6
PEN
ERROR
PEN
-
Pressing any
PEN
pushbutton causes
the plotter to retrieve the corresponding num­
bered pen from the carousel, if it is present. [f
the corresponding numbered carousel position
is empty. the pen holder returns to its previous
location. The plotter stores its current pen, if
any. before it retrieves the newly selected pen.
The old pen is stored into the carousel position
from which it came, or into the lowest�numbered
empty position if its original carousel position
has since become unavailable. After the pen
is retrieved, the pen holder returns to its pre­
vious location. If a plot is in progress when
the
PEN
push button is pressed, the plot is
paused and does not resume until after the
pen is retrieved and the pen holder returns to
its previous location.
Pressing
ENTER
simultaneously with any
PEN
push button causes the plotter to store its cur·
rent pen into the corresponding numbered
carousel position, if possible. If the selected
carousel position is occupied, the plotter stores
its current pen into the lowest·numbered empty
position, if any. The pen holder then returns
to its previous location.
ERROR
-
This multi·purpose
ERROR
light can
be off, on, or blinking as follows:
a. When the
ERROR
light is on but not blink­
ing, it indicates the
VIEW
push button has
been pressed or the paper loading lever is
in the
PAPER LOAD '
position (pinch wheels
up).
b. When the
ERROR
light is blinking brightly,
it indicates the plotter has detected an 1/0
error, a paper moving error, or an HP·G L
error for which the error mask has been
set. For a description of errors, refer to
instructions IM,
OE, and ESC . E in the
Interfacing and Programming Manual.
NOTE:
When the plotter is not active,
the
E R R O R
light will blink very dimly
approximately every five seconds. This indi·
cates internal power supply
calibration i. being
performed.
_
PLO'ITER OPERATION
2-17