<4. Diagnostics >
4-1
IM 01C50T01-02EN
4. Diagnostics
4.1 Self-Diagnostics
The YTA monitors its own performance during
operation. Upon detecting any abnormality, the YTA
displays and records the abnormality in parameters,
outputs out-of-range values, and in the case of a
type with an integral indicator, it displays an alarm
number corresponding to the abnormality.
4.1.1 Checking for Problems
(1) Identifying Problems with the HART
Communicator
Self-diagnostics of the transmitter and check of
incorrect data settings can be carried out with the
HART communicator. There are two methods for
self-diagnosis of the transmitter; self-diagnosis for
every transmission and manually executing the Self
test command.
When an alarm message appears, see Table 4.1
“List of Alarms” for details.
a) Procedure to call up the display
b) Device setup → Diag/Service → Test Device →
exec Self test
Select “Perform”
c) If there is no alarm detected, “Self test OK” will
be displayed. When an alarm occurs, an alarm
message appears, and the results of self-
diagnostics appear in the Status item.
d) Procedure to call up the Status display
Device Setup → Diag/Service → Device Status
→ Current Dev Status
e) If no alarm is detected, the result of diagnostics
is indicated as “Off”. If “ON” is indicated, a
countermeasure for that alarm is necessary.
The HART configuration tool diagnoses at each
communication.
When an improper operation is performed, the
alarm message is displayed.
(2) Checking with the Integral Indicator
If an alarm is detected in the self-diagnostic, an
alarmcode is displayed on the digital indicator. If
there is more than one alarm, the alarm codes
appear in turns.
Refer to “Table 4.1 List of Alarms” to check the
alarm contents and the countermeasure.
4.1.2 Status Information
(1) Device Status
Device status indicates the current operating status
of the device.
Table 4.5 indicates the relation between alarm and
device status.
• Procedure to call up the display
Device setup → Diag/Service → Device Status
→ Current Dev Status → Device Status
Device status can be masked individually. Table4.6
indicates the mask available and the initial setting of
the mask.
• Procedure to call up display
Device Setup → Diag/Service → Device Status
→ Device Status Mask → Status group (0 to 5,
14, 15) Mask
(2) Extended Device Status
Extended device status contains commonly used
device information.
Table 4.5 indicates the relation between alarm and
Extended device status.
• Procedure to call up the display
Device setup → Diag/Service → Device Status
→ Current Dev Status → Ext Dev Sts
(3) Device Specific Status
Device specific status indicates the current alarm
status.
Table 4.5 indicates the relation between alarm and
device status.
• Procedure to call up the display
Device setup → Diag/Service → Device Status
→ Condensed Status Map
→ Status group (0 to 5, 14, 15) Map
(4) Data quality and Limit status
The transmitter can handle PV, SV, TV, QV, and etc.
Each variable contains data quality and limit status
for providing useful status about the data value.
The data quality is normally “Good”. However, in
the case of a sensor failure or out of measurement
range, it turns to “Bad” or “Poor Accuracy” The limit
status indicates whether the data value is limited.
(i.e., not responding to the process).
When the limit status is “Constant”, the value will
not to be changed.
