Keithley 237

SECTlON3
IEEE-488 Reference
3-66
+
played (CAL ADC
ZERO,
CAL ADC GAIN, CAL
SRC
ZERO,
or
CAL
SRC
GAIN),
and
a default cal constant value is substituted.
Cal. Common Mode
Error-
Set
when
there is
an
error in calibrating the common
mode
adjustment. The CAL
MODE
ERR
message is displayed.
Cal. Compliance
Error-
Set
if
compliance occurs
during
a calibration procedure.
The CAL COMPLI message is displayed.
Cal. Value
Error-
Set
when
the entered value of a cal constant is outside the ex-
pected value for the present step. The message CAL VALUE
ERR
is displayed; check
the specified value sent with the C command
and
re-enter.
Cal. Constants
Error-
Set
when
the
power-up
verification of the cal constants finds
one
or
more values outside of predetermined limits. The message CAL CON-
STANTS
ERR
is displayed; default value(s) are used.
Cal. Invalid
Error-
Set
when
one
or
more cal errors (Cal. ADC Zero, Cal. ADC
Gain, Cal. SRC
Zero, Cal.
SRC
Gain, Cal. Mode, Cal. Compliance) are present
on
power-up, factory initialization DCL,
or
SOC.
The message CAL INVALID
ERR
is
displayed.
U2-
Stored
Message
The
U2
command is for reading back the last ASCII message that was stored with the
02
command. The message is
in
the form shown
in
Figure 3-16.
Up
to 18 characters
may
be
in
the message.
Identifier
~
D
SPa
a a a
aaa
a a a a a a a a a a a <TERM+
EOI>
I I
I
Last
ASCII String Stored
With
02
Command
Figure 3-16.
U2
Stored
ASCII
String
U3-
Machine
Status
The format of the
U3 machine status
word
is shown
in
Figure 3-17. After the identi-
fier
MST
(machine status), the letters correspond to the modes programmed
by
the
respective device-dependent commands. Note that all returned values correspond
to the programmed numeric values.
+