Front/Rear Switch Position; Complete Program Example; Front Panel Sad; Abort (Interface Clear) - HP 3456A Operating And Service Manual

Model 3456A
3·193. FrontJRear Switch Position.
3-194. The Front/Rear Switch position can be remotely
determined over the HP-lB. This is done by sending
program codes "SW 1 " to the 3456A and then reading
its output. If "0" is output, the switch is set to REAR
and " I " indicates FRONT. Use the programming pro­
cedure in Paragraph 3-165 to send the codes and the
procedure in Paragraph 3-184 to read the output data
(switch position). The output is as follows:
J o < o
.. ...
... J
o.'PII ' in ASCII i'h ,
r",m
0IId ''0'' ,I>< I'<"n"",
':1"
... FRONT """.
indiwi.,. ,
,oon
REAR
3·195. Complete Program Example.
3-196. After you know how to program the 3456A
using the HP-IB, the next step is to write a program of
the algorithm in Paragraph 3-162. Again, the program
is given in the HP-IB Format, HPL (9825A Comroller
Language), and Enhanced Basic (9835A/B, 9845B Con­
troller Language).
a. HP-IB Format.
I . Interface clear ABORT all previous operation
2. 1U6 REMOTE the 3456A
3. 1U6 004
CLEAR the instrument
4. 021 LOCAL
3456A (including the other
devices on the controller's
select code)
5 . 1U6 Send DATA to set up the in­
FIRIT4SM020 15 strumem to the dc function,
12
autorange, hold trigger, and
set SRQ bit 4 mask (15 is CR
and 12 is LF)
6. 1U6 010 TRIGGER the 3456A
7. 1U5V Send the measurement DATA
+ D.DDDDDDE + D
to the controller and store in
015 EOI 012
a variable
8. 15V 030 I f REQUIRE
check the STATUS BYTE;
otherwise skip the next step
(the 030 is the Serial Poll
enable)
9, 10. 031 No STATUS BYTE is sent by
the 3456A (the 031 is the Serial
Poll disable)
1 1 . Controller Lan­ Print out the DATA in vari­
guage able A
12. 1U, 001 CLEAR
SET LOCAL (in this case,
only for the 3456A)
13. Controller Lan­
Ends the program
guage
CR�OILf
.. f«d
Eod o r
eo .... .. .
Idtn,ir� (if .. ,bled
R".,"
LOCKOUT the
SERVICE,
LOCKOUT AND
b. HPL (9825A Controller Language).
0: cH 7 ABORT
I : rem 722
REMOTE 3456A
2: clr 722
CLEAR 3456A
3: 110 7
LOCAL LOCKOUT
4: wrt 722, DATA. Set up instrument
"FIRIT4SM020"
5 : trg 722 TRIGGER 3456A
6: red 722,A DAT A.Output of 3456A into
variable
7: ,ds (722) - S REQUIRE SERVICE?
8: if S=O; gto 10 If no STATUS BIT, skip the
next line
9: stp Stop the program
10: prt A Print
variable
1 1 : 1c1 722 CLEAR
SET LOCAL (3456A)
12: end Ends the program
c. Enhanced Basic (9835A/B, 9845B Controller
Language).
10 ABORTIO 7 ABORT
20 REMOTE 722 REMOTE 3456A
30 CLEAR 722 CLEAR 3456A
40 LOCAL LOCAL LOCKOUT
LOCKOUT 7
50 OUTPUT 722; DATA. Set up instrument
"FIRIT4SM020"
60 TRIGGER 722
TRIGGER 3456A
70 ENTER 722;A DATA. Output of 3456A into
variable
80 STATUS 722;S REQUIRE SERVICE?
90 IF S = O THEN If no STATUS BIT, skip the
GOTO 1 1 0 next line
100 STOP Stop the program
110 PRINT A Print
variable
120 LOCAL 722 CLEAR
SET LOCAL
130 END Ends the program
3-197. The information you have received in the
preceding paragraphs should give you a good start in
programming the 3456A over the HP-lB. The following
paragraphs explain some more unique remote opera­
tions.
3·198. Front Panal SAD.
3-199. The Front Panel SRQ feature of the 3456A out­
puts a Require Service Message when the Front Panel
SRQ button is pressed. Before this can take place. set bit
o
on the SRQ mask (refer to Paragraph 3-169 to set the
mask). Once this is done, press the SRQ button. The
front panel SRQ LED will turn on and the Require Ser­
vice Message is output. This condition will remain until
Operation
output DATA in
LOCKOUT AND
output DATA in
LOCKOUT AND
3·27