HP 54501A - Page 117

*STB
Table
5-5.
The
Status
Byte
Register
Bit
7
6
5
4
3
2
1
0
0
=
False
1
=
True
Bit
Weight
128
64
32
16
8
4
2
1
Bit
Name
...
ROS/MSS
ESB
MAV
LTP
MSG
LCL
TRG
0
=
0
=
1
=
0
=
1
=
0
=
1
=
0=
1 =
0
=
1
=
0
=
1
=
0
=
1
=
=
Low
=High
Condition
not
used
instrument
has
no
reason
for
service
instrument
is
requesting
service
no
event
status
conditions have occurred
an
enabled
event
status
condition has
occurred
no
output messages
are
ready
an
output
message
is
ready
no
limit
test
has
failed
limit test has
failed
no
message
has
been
displayed
message
has
been
displayed
a
remote-to-local
transition
has
not
occurred
a
remote-to-local
transition
has
occurred
no
trigger
has
occurred
a trigger
has
occurred
Common
Commands
5-22
HP
54501A
Programming