Software Overview - Datron 1061 Calibration And Servicing Handbook

34
3.8.1.1
Software
Overview
The system
uses
the
technique
of
a
loop.ing
prioritised
job
scheduLr
i;Ë¡;.';:ääi.'Ëã.r'
job
driven
from
the
scheduler
¡t
"oi.roriuj'b;;iì.;l;
the
svstem
workspace
which
is
*,
*nå" ,iï¡."J
i.
rräiirr¿ io oâ
run and cleared
when
compl.i.l.
'Ë.¡år'*-"
åi'.",iru,io¡
is
ensured
bv
makins u."tr
io¡'
.;i;;;'"JroiJon,
to
the top
of
the
schedule.
Program
Modules: The
program memory
is
split into
a series
of functional
modules.
each module
corresponding
fairly closely
to
a major functional
area
and hence
to
one
of
the jobs
activated
by the job
scheduler,
the
larger ones
being sub-divided, see
Drawing
No. 890043.
I
I
I
I
I
I
I
I
I
I
¡
I
;
¡
;
FITTED
?
OPTION
IS
PROGRAM
BUFFER
NON-EMPTY
EB
UT
ts
ROR READ-O
REOUIRED
?
HAS DATA
BEEN
ACCEPTED
FROM
A-D
?
HAS
DATA
BEEN
PROCESSED
?
FOR
IN
ADY
IS BCD
DATA
ONF
IS
A-D
READY
?
ts
KEYEOARD
BUFFER
NON-EMPTY
?
OUTPUT DATA
TO
REMOTE
INTERFACE
COMPUTE
LIMIT
OF UNCERTAINTY
ACCEPT DATA
FROM
A-D
CONVERTER
CA
COMPUTE FUNCTION
OT
READING
AS
REOUIRED
AA
PROCESS
REMOTE
COMMAND
PROCESS KEYBOARD
COMMAND
DISPLAY
DATA
ON
FRONT PANEL
RESTART SUSPENDED
PROGRAM
INITIALISE
HAS
TIME
GUARD
EXPIRED
?
Yes
No
Yes
(}
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
No
FIG.3.34
JOB SCHEDULER