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HP 1630D User Manual

HP 1630D
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An
HP-IB
Overview

Model
1630A/D/G
A
typical
HP-113
system
is
shown
below
.
9872-A-172-1
MESSAGECONCEPTS
Devices
which
communicate
along
the
interface
bus
are
transferring
quantities
of
information
.
The
transfer
of
information
can
be
from
one
device
to
another
device,
or
from
one
device
to
more
than
one
device
.
These
quantities
of
information
can
easily
be
thought
of
as
"messages"
.
In
turn,
the
messages
can
be
classified
into
twelve
types
.
The
list
below
gives
the
twelve
message
types
for
the
HP-I
B
.
B-
2
1
.
The
Data
Message
-This
in
the
actual
information
which
is
sent
from
one
talkerto
one
or
more
listeners
along
the
interface
bus
.
2
.
The
Trigger
Message
-
This
message
causes
the
listening
device(s)
to
perform
a
device-dependent
action
when
addressed
.
3
.
The
Clear
Message
-
This
message
causes
either
the
listening
device(s)
or
all
of
the
devices
on
the
bus
to return to their
predefined
device-dependent
states
.
4
.
The
Remote
Message
-
This
message
causes
listening
devices
to
switch
from
local
front-panel
to
remote
program
control
when
addressed
to
listen
.
5
.
The
Local
Message
-
This
message
clears
the
Remote
Message
from
the
listening
device(s)
and
returns
the
device(s)
to
local
front-panel
control
.
6
.
The
Local
Lockout
Message
-
This
message
prevents
a
device
operator
from
manually
inhibiting
remote
program
control
.
7
.
The
ClearLockout/Local
Message
-
This
message
causes
all
devices
on
thebus
to
be
removed
from
Local
Lockout
and
revert
to
Local
.
This
message
also
clears
the
RemoteMessage
for
all
devices
on
the
bus
.
8
.
The
Require
Service
Message
-
A
device
can
send
this
message
at
any
time
to
signify
that
the
device
needs
some
type
of
interaction
with
the
controller
.
This
message
is
cleared
by
sending
the
device's
Status
Byte
Message
if
the device
no
longer
requires
service
.
9
.
The
Status
Byte
Message
-
A
byte
that
represents
the
status
of
a
single
device
on
the
bus
.
Bit
6
indicates
whether
the device
sent
a
Require
Service
Message,
and
the
remaining
bits
indicate
operational
conditions
defined
by
the
device
.
This
byte
is
sent
from
a
talking
device
in
response
to
a
serial
poll
operation
performed
by
a
controller
.

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HP 1630D Specifications

General IconGeneral
BrandHP
Model1630D
CategoryMeasuring Instruments
LanguageEnglish

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