Summary Of Output Response Types - HP 7470A Interfacing And Programming Manual
Graphic plotter
Hide thumbs
Also See for HP 7470A:
- Interfacing and programming manual (230 pages) ,
- Operator's manual (41 pages) ,
- Service manual (141 pages)
Table of Contents
Advertisement
)
■}
he Output Status Instruction, OS
The output s t a t u s instruction, OS, is used to o u t p u t t h e
decimal equivalent of the s t a t u s byte.
i ' M v l
T h i s instruction is useful in debugging o p e r a t i o n s a n d in
digitizing applications.
I f f i E E l
OS
(terminator)
No p a r a m e t e r s are used. The instruction will execute
even if no t e r m i n a t o r is received.
Upon receipt of the O S instruction, the internal eight-bit s t a t u s byte is
converted to a n integer between 0 a n d 255. Output is in A S C I I in t h e
form:
s t a t u s [TERM)
The s t a t u s bits are defined a s follows:
B i t
V a l u e
B i t
P o s i t i o n
16
32
64
28
4
5
6
7
M e a n i n g
Pen down.
P I or P 2 changed; cleared b y r e a d i n g
output of O P in HP-IB or HP-IL s y s t e m
or b y a c t u a l output of P1.P2 i n RS-232-C
system.
Digitized point available; cleared b y
r e a d i n g digitized value in HP-IB or
HP-IL system or by output of point in
RS-232-C system.
Initialized; cleared b y r e a d i n g O S output
in HP-IB or HP-IL system or by output
of the s t a t u s byte in RS-232-C system.
Ready for data; pinch wheels down.
Error; cleared by r e a d i n g OE output in
HP-IB or HP-IL system or by output of
the error in RS-232-C system.
Require service message set ( a l w a y s 0
for O S ; 0 or 1 for HP-IB serial poll).
Not used
Upon power up, t h e s t a t u s is decimal 24, the s u m of 8 (initialized) a n d
16 (ready for d a t a ) . U p o n o u t p u t of the s t a t u s byte after a n O S
c o m m a n d , bit position 3 is cleared.
■8 OBTAINING INFORMATION FROM THE PLOTTER
Summary of Output R e s p o n s e Types
T h e following t a b l e s h o w s t h e n u m b e r a n d t y p e of i t e m s in the re
s p o n s e to e a c h H P - G L o u t p u t c o m m a n d . T h e t a b l e i n c l u d e s o u t p u t com
m a n d s e x p l a i n e d in C h a p t e r s 2 a n d 6 a s well a s in t h i s c h a p t e r . T h i s
table will be helpful w h e n p r o g r a m m i n g in l a n g u a g e s s u c h as FOR
T R A N w h i c h r e q u i r e you to specify t h e t y p e of a n d n u m b e r of digits i n
a variable.
Instruction
OA
OC**
OD
OE
OF
01
0 0
OP
OS
OW
Number of
Parameters
Returned*
3
3
3
1
2
1
8
4
1
4
Type and R a n g e
integers, all =? 5 digits
decimals, a l K 11 digits
integers, all ^ 5 digits
integer, 1 digit —
integers, 2 digits each
5-character string
integers, 1 digit each
integers, 1st and 3rd =S 5 digits;
2nd and 4th ^ 4 digits
integer, ^ 3 digits
integers, 1st and 3rd ^ 5 digits;
2nd and 4th ^ 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-IB or RS-232-C plotter that has a serial prefix number
lower than 2308A, OC 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
Advertisement
Table of Contents
