HP 7470A Interfacing And Programming Manual page 50

Error 3 will be set (parameter out of range). A PR command with out of
range parameters will still establish, relative plotting mode for future
occurrences of PD or PU with parameters.
When scaling is off, in-range parameters are between -32 768 and
32 767. When scaling is on, in-range parameters and their plotter unit
equivalent must be between -32 768 and 32 767. To find plotter unit
equivalents, refer to the section Converting from User Units to Plotter
Units in Appendix C.
The following strings of HP—GL instructions, when sent to the plotter
using your computer's output statements, cause triangles to be drawn
that are identical to the ones previously drawn using only the PA in­
struction. The numbers in parentheses on the plot are the X,Yincre­
ments of the PR commands. The numbers without parentheses are the
plotter unit coordinates of the vertices.
"Il'-l,'SF'1;"
" PFIZOOO, 1500, PD, )=~)::—20:::u:n, 0 , -r_~0-:::u*:::_, 2::::c::u::.- 0 —':;'E:n:3r.Z), PU, 500, 0; "
"P1:I2000_,0_, —200r:y,20c:n0,0, -2000,):-)_I_;"
2000 , 3500 2500 , 3500
(2000 , 2000) (-2000 , 2000)
N /
/
0 , 1500 START 2500, 1500 4500 .1500
(-2000 ,0) 2000, 1500 (500 v0) '2°°° I °'
(0 , -2000) (0 , -2000) END
3-10 CONTROLLING THE PEN AND PLOTTING