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4.3.2.5 Questionable Status Register Set
The questionable status register reports various states of the instrument that could
indicate the quality of the output signal may be compromised. Any or all of these
events may be reported in the questionable event summary bit through the enable
register (FIGURE 4-5). The questionable event enable command
(
STATus:QUEStionable:ENABle
) programs the enable register and the query
command (
STATus:QUEStionable:ENABle?
) reads it.
STATus:QUEStionable[:EVENt]?
reads and clears the operation event register.
STATus:QUEStionable:CONDition?
reads the operation condition register.
The used bits of the operation event register are described as follows:
D
Inter processor Communication Error (HBT), Bit (9):
indicates that there is no communi-
cation between the embedded microprocessor and the main microprocessor.
D
Calibration Error (CAL), Bit (8):
indicates that the instrument did not pass calibration,
contains corrupt calibration constants, contains default calibration constants, or
has uninitialized calibration memory.
D
Field Control Overload (FCO), Bit (7):
indicates that the field control option card has
reached the limit of its voltage range but the measured field has not reached the
field control setpoint.
D
Field Control Slew Rate Limit (FCSR), Bit (6):
indicates that the rate of change of the
field control output voltage is being limited by the slew rate parameter.
D
Invalid Probe (PRO), Bit (5):
indicates that the connected probe is not compatible
with the instrument.
D
Temperature Compensation Error (TCP), Bit (4):
indicates that the connected probe has
built-in temperature compensation but the instrument cannot read the tem-
perature sensor.
D
EEPROM Read Error (EER), Bit (3):
indicates that the instrument is unable to read the
EEPROM (memory) of the connected probe.
D
Sensor Error Z (SENZ), Bit (2):
indicates that the instrument detects that there is an
open circuit on the Z channel; there is not a connection with the sensor.
D
Sensor Error Y (SENY), Bit (1):
indicates that the instrument detects that there is an
open circuit on the Y channel; there is not a connection with the sensor.
D
Sensor Error X (SENX), Bit (0):
indicates that the instrument detects that there is an
open circuit on the X channel; there is not a connection with the sensor.
FIGURE 4-5
Questionable event status register
OR
Not
used
Not
used
Not
used
15 14 13 12 11 10 9
8
Not
used
Not
used
Not
used
HBT
CAL
SENY
SENZ
EER
TCP
PRO
FCSR
FCO
Not
used
Not
used
Not
used
Not
used
Not
used
Not
used
HBT
CAL
SENY
SENZ
EER
TCP
PRO
FCSR
FCO
Not
used
Not
used
Not
used
Not
used
Not
used
Not
used
HBT
CAL
SENY
SENX
SENX
SENX
SENZ
EER
TCP
PRO
FCSR
FCO
7
6
5
4
3
2
1
0
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Questionable Condition Register
STATus:QUEStionable:CONDition?
Questionable Event Register
STATus:QUEStionable[:EVENt]?
Questionable Event Enable Register
STATus:QUEStionable:ENABle
STATus:QUEStionable:ENABle?
— Bit
— Name
— Bit
— Name
— Bit
— Name
=
=
=
=
=
=
=
=
=
=
HBT
CAL
FCO
FCSR
PRO
TCP
EER
SENZ
SENY
SENX
Heartbeat error
Calibration error
Field control overload
Field control slew rate limit
Invalid probe
Temperature compensation error
EEPROM read error
Sensor error Z
Sensor error Y
Sensor error X
AND
AND
AND
AND
AND
AND
AND
AND
AND
AND
To questionable
summary bit
(QSB) of status
byte register
