HP 54501A - Bit Definitions; Poll

Bit
Definitions MAY
•
message
available.
Indicates whether
there
is
a
response
in the
output
queue.
ESB
•
event status
bit
Indicates
if
any
of the
conditions
in
the
Standard
Event
Status
Register
are
set
and
enabled.
MSS
•
master
summary
status.
Indicates
whether
the
device
has
a
reason
for
requesting
service.
This bit
is
returned for
the
*STB?
query.
RQS
•
request
service.
Indicates
if
the
device
is
requesting
service.
This
bit
is
returned
during
a serial poll. RQS will
be
set
to
0
after
being
read
via
a serial
poll
(MSS is
not
reset
by
-STB?).
MSG
-
Message.
Indicates whether
there
is
a
message
in the
message
queue.
PON
•
power
on.
Always
0
in the HP
54501A.
URQ
-
user
request.
Indicates
whether
a
front
panel key
has
been
pressed.
CME
-
command
error.
Indicates
whether
the
parser
detected
an
error.
EXE
•
execution
error.
Indicates whether
a
parameter
was
out
of
range,
or
inconsistent
with
current
settings.
DDE
•
device
specific
error.
Indicates
whether
the
device
was
unable
to
complete
an
operation
for
device
dependent
reasons.
QYE
-
query
error.
Indicates
whether
the
protocol
for
queries
has been
violated.
RQC
•
request
control.
Indicates whether
the device
is
requesting control.
The
HP
54501A
will
never
request
control.
OPC
-
operation
complete.
Indicates
whether
the device has
completed
all
pending
operations.
LCL
-
local.
Indicates whether
a
remote
to
local transition
has
occurred.
Message
Communication and System
Functions
HP
54501A
3-30
Programming