Instruction - HP 7470A Interfacing And Programming Manual

Summary of Output Response Types
The following table shows the number and type of items in the re­
sponse to each HP-GL output command. The table includes output com­
mands explained in Chapters 2 and 6 as well as in this chapter. This
table will be helpful when programming in languages such as FOR­
TRAN which require you to specify the type of and number of digits in
a variable.
Number of
Parameters
Instruction Returned* Type and Range
OA 3 integers, all < 5 digits
OC** 3 decimals, all S 11 digits
OD 3 integers, all S 5 digits
OE 1 integer, 1 digit
OF 2 integers, 2 digits each
OI 1 5—character string
OO 8 integers, 1 digit each
OP 4 integers, 1st and 3rd < 5 digits;
2nd and 4th S 4 digits
OS 1 integer, < 3 digits
OW 4 integers, 1st and 3rd < 5 digits;
2nd and 4th S 4 digits
*In addition to these parameters, the output terminator [TERM]is always sent
at the end of output, and commas are sent to separate parameters.
**If you have an HP—IBor RS-232—C plotter that has a serial prefix number
lower than 2308A, O C parameters are output as integers. For more informa­
tion, refer to the explanation of the OC instruction in this chapter.
OBTAINING INFORMATION FROM THE PLOTTER 7-9