HP 7470A Interfacing And Programming Manual page 47

2. have not executed an output error instruction; and
3. the error light is not on at the end of your plot.
(The fact that the error light is on does not necessarily mean out—of—
range data has been encountered; an error in any HP—GL command
will turn the light on.)
The following strings of HP—GL instructions, if sent to the plotter using
a suitable output statement such as PRINT or OUTPUT, will draw two
triangles and then move to the point 10 900, 7650with the pen up.
"IH'SP1;"
J
" F'l:l2OOC3, 1 501:), PD, 0, l'3C1l'3v,2C3C'lU ' _ F""'|I:lC|, '1E ',
" F'l:|PU*'l500_, 1 5C]D, ET5C'J|I:J, 335CJ'L-'1, 25l'_HJ|'_. 'l 5'C_3'1_C|__. F'L|_, 'l |I:|t||;?'l':)
2000 , 3500 2500 , 3500
X' /
'\ /'
V} 1500 2000 ,{500 2500 , 1500 4500 , 1500
The next strings of HP—GL instructions scale the plotting area into user
units 0 to 100 in each axis and again draws two triangles. Use an out­
put statement implemented on your computer to send the strings to the
plotter.
"IN;SP1;SCO,1U0,0,1DO;"
"F'Fl2Cl, 15, F'ElV,O,1'EiV,EiCJ_,35,20, 'l5_,F'|_|_,;-'-_'5_,15';"
"PHPn45,15,25,35,25,15,Pu;"
CONTROLLING THE PEN AND PLOTTING 3-7