Appendix B: Instruction Syntax; Hp-Gl Syntax - HP 7470A Interfacing And Programming Manual

Appendix
Instruction Syntax
HP-GL Syntax
This section lists the formal syntax for each plotter instruction in
alphabetical order of the instruction's two-letter mnemonic.
Each instruction is listed with its purpose, syntax, parameter or re­
sponse type, and range. If no parameter range is given, the range is
-215 to 215-1. Refer to the indicated pages for details. The semicolon is
included as the terminator for all instructions except the label instruc­
tions. A nonalphabetic or nonnumeric character such as # or $, or the
next mnemonic can also be used as the instruction terminator. In
addition, if you have an HP-IB or HP—IL plotter, the line feed character
can be used as a terminator. The semicolon appears in parentheses (;)
if the instruction executes without the plotter receiving the terminator.
[TERM] means the terminator sent by the plotter at the end of output.
It is CR LF in an HP—IB or HP—IL configuration and CR or as set by an
ESC . M command in an RS-232-Cconfiguration.
AA* The Arc Absolute Instruction Page3-17
AA X—coordinate,Y—coordinate,arc angle(,chord angle);
Purpose: Draws arc of specified number of degrees with specified
smoothness; centered at X,Y coordinate, using current
pen status (up or down).
Parameters: X— and Y—coordinates— integer, in plotter units unless
scaling in effect; then in user units.
are angle — integer, negative value specifies clockwise
are, positive value specifies counterclockwise arc.
chord angle —integer, defines arc smoothness in degrees.
Default is 5 degrees.
*Available only with RS-232-Cplotters that have the serial prefix number 2308Aor
higher.
INSTRUCTION SYNTAX B-l