Keithley 237

+
SECTION3
IEEE-488
Reference
It
is
sent
with
two
trailing spaces
plus
the
terminator
and
EOI
(unless disabled
with
the
K command).
Ul-
Error
Status
Word
The
U1
command
allows access
to
Model236/237
/238
error
conditions. The
error
status
word
(Figure 3-15) is actually a
string
of
ASCII
characters representing binary
bit
positions. Reading
the
U1
status, a DCL
or
SOC,
or
a
JOX
command
clears the bits.
An
error
condition is flagged
in
the
serial poll
byte
while
any
error
bits
in
the
error
status
word
are
set.
The
complete
command
string is ignored
if
an
IDDC,
IDDCO,
or
Not
In
Remote
error
occurs. The
instrument
can
be
programmed
to
generate
an
SRQ
when
an
error
condition occurs (see
paragraph
3.6.11).
Identifier
~
E R
S
b
b b
•••
b b b
cTERM
+
EOI>
Most
Significant
Byte
_j
L
Least
Significant
Byte
Most Significant Byte
Least Significant Byte
I
26-byte
ASCII
String
0
=No
Error
1 =Error
Trigger
Overrun
I
DOC
IDDCO
Interlock
Present
Illegal
Measure
Range
Illegal
Source
Range
Invalid
Sweep
Mix
Log
Cannot
Cross
Zero
Autoranging
Source
with
Pulse
Sweep
In
Calibration
In
Standby
Unit
isa236
IOU
DPRAM
Failed
IOU
EEROM
Failed
IOU
Cal
Checksum
Error
DPRAM
Lockup
DPRAM
Link
Error
Cal
ADC
Zero
Error
Cal
ADC
Gain
Error
Cal
SRC
Zero
Error
Cal
SRC
Gain
Error
Cal
Common
Mode
Error
Cal
Compliance
Error
Cal
Value
Error
Cal
Constants
Error
Cal
Invalid
Error
Figure
3-15.
U1
Error
Status
Word
The
various bits
in
the
U1
error
status
word
are
set
when
the
following conditions
are
present:
+
3-63