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Honeywell 200 Series User Manual

Honeywell 200 Series
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PARITY
(cont)
PROGRAM
SECTION
II.
OPERATOR'S
CONTROL
PANEL
button.
The
run
requirements
of
each
installation
vary,
and
the
handling
of
error
conditions
is
often
a
function
of
the
type
of
run,
e.
g.,
production
or
checkout.
How
a
parity
check
is
to
be
handled
may
be
defined
by
the
programmer's
instructions
to
the
operator
or
by
locally
established
policy.
In
general,
the
opera-
tor
may
reset
the
PARITY
indicator
by
pressing
either
the
SYSTEM
CLEAR
or
the
INITIALIZE
button
on
the
control
panel
and,
if
necessary,
clear
memory
and
restart
the
run.
NOTE:
It
may
be
possible
to
effect
a
restart
without
clearing
memory.
The
operator
may
also
perform
any
other
set
of
procedures
specified
locally
by
the
installation.
This
check
condition
is
caused
by
an
illegal
op
code
in
the
pro-
gram
(see
page
2-12).
Depending
on
the
type
of
run
and
the
programmer's
instructions
to
the
operator,
the
operator
may
clear
the
PROGRAM
indicator
by
pressing
either
the
SYSTEM
CLEAR
or
the
INITIALIZE
button
and
attempt
to
continue
the
run.
NOTE:
Pressing
the
INITIALIZE
button
resets
all
central
processor
auxiliary
storage
functions,
thus
perhaps
destroying
pertinent
program
information.
The
operator
should
always
exercise
extreme
caution
in
the
use
of
the
INITIALIZE
button.
To
continue
processing,
the
operator
must
prevent
the
re-extraction
of
the
offending
op
code
by
changing
it
to
a
No
Operation
(NOP)
in-
struction.
Program
execution
resumes
at
the
next
op
code
identi-
fied
by
a
word
mark.
The
operator
may
also
perform
any
other
set
of
procedures
specified
locally
by
the
installation
for
handling
a
program
check.
Control
Panel
Checkpoint
Procedures
A
"checkpoint"
is
a
programmed
condition
whereby
processing
is
delayed
or
stopped
to
await
an
operator
decision.
The
operator
can
easily
recognize
the
existence
of
a
checkpoint
by
observing
the
control
panel.
Any
checkpoint
is
denoted
by
the
control
panel
lights
becoming
constant
to
signify
a
machine
halt.
Depending
on
the
configuration
of
the
control
panel
lights,
the
checkpoint
(machine
halt)
may
indicate
Simply
the
completion
of
a
job
or
the
necessity
for
a
parameter
entry
by
the
opera-
tor.
(The
occurrence
of
a
checkpoint
implies
that
no
abnormal
stop
conditions
have
occurred,
e.
g.,
a
parity
error.)
The
contents
of
the
pertinent
control
memory
register
(usually
the
A-
,
and/or
B-address
registers)
must
be
consulted
in
accordance
with
the
programmer's
instruc-
tions
to
the
operator.
In
this
way,
the
operator
can
determine
the
nature
of
the
machine
halt
(by
comparing
the
contents
of
specified
registers
with
predefined
checkpoint
codes)
and
then
act
accordingly.
The
actions
which
may
be
taken
by
the
operator
are
those
which
are
normally
as-
sociated
with
job
completion
(e.
g
••
demounting
tapes.
disposition
of
output.
etc.)
or
the
control
panel
entry
of
a
previously
defined
parameter
which
permits
processing
to
continue
according
to
programmer-specified
operating
options.
2-16
r
---
~--

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Honeywell 200 Series Specifications

General IconGeneral
BrandHoneywell
Model200 Series
CategoryDesktop
LanguageEnglish

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