Command Syntax For Device Control Instructions - HP 7470A Interfacing And Programming Manual
Graphics plotter
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Also See for 7470A:
- Operator's manual (41 pages) ,
- Interfacing and programming manual (114 pages) ,
- Service manual (141 pages)
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The plotter acts on device control instructions immediately upon receipt.
It does not store them in the data buffer.
Command Syntax for Device Control Instructions
Device control instructions are three-character escape code sequences
comprised of "ESC" and "." followed by one of the characters @, B, E,
H, I, J, K, L, M, N, or O, R, (, ), Y, or Z.
When an instruction is put together with its required parameters,
delimiters, and/ or terminators, it becomes a "command." These syntax
conventions are used with the commands discussed in this chapter:
[
]
(
)
<DEC>
<ASC>
[TERM]
Brackets indicate that all parameters enclosed
are optional.
Parentheses indicate that each individual pa—T
rameter is optional.
The semicolon follows and delimits parameters.
If a semicolon appears without a parameter, the
parameter is defaulted.
The colon terminates any command which may
have parameters and can occur after any valid
number of parameter entries. Any parameter
that is not specified is defaulted.
This symbol specifies a decimal value parameter.
For example, the characters 10 would represent
the decimal value ten; the characters 13 would
represent the decimal value thirteen.
This symbol specifies the decimal equivalent for
an ASCII character (see the ASCII Character
Equivalents table in Appendix C). In this case,
the characters 10 would represent the ASCII
line feed character, LF, and 13 would represent
the ASCII carriage return character, CR.
Specifies a number of optional parameters. Each
parameter must be followed by a delimiter (;) or
the terminator (2).
Unless changed by an ESC . M command, all
RS-232-C output responses include a CR as a
terminator.
RS-232—C/CCITTV.24 INTERFACING
10-23
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