Yokogawa EJX930A - Manual (Page 52)

<4. Diagnostics>
4-2
IM 01C25R02-01E
4.1.2 Checking with Integral Indicator
NOTE
If an error is detected by running self-diagnostics,
an error number is displayed on the integral
indicator. If there is more than one error, the error
number changes at three-second intervals.
See table 4.3.1 regarding the alarm codes.
F0401.ai
Figure 4.1 Integral Indicator
4.1.3 Status information available for
HART 7
Status added to HART 7 is explained below.
(1) Device Status
Device Status indicates the current operating
status of the device. (Refer to Table 4.7)
Table 4.10 indicates the relationship between
alarm and Device Status.
• Procedure to call up the display using DD
(HART 7) and DTM (HART 7)
DD (HART 7)
DTM (HART 7)
[Root Menu] → Diag/Service →
Status → Device Status
(2) Extended Device Status
Ext dev status contains commonly used
device information. (Refer to Table 4.8)
Table 4.10 indicates the relationship between
alarm and Extended Device Status.
• Procedure to call up the display using DD
(HART 7) and DTM (HART 7)
DD (HART 7)
DTM (HART 7)
[Root Menu] → Diag/Service →
Status → Ext dev status
(3) Data quality and Limit status
EJX multivariable transmitter can handle
Dynamic Variables (PV, SV, TV, QV) and Device
Variables (DP(Pres), SP, ET, Flow, Total Flow,
% range, Loop current). 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 be changed. For detail, refer to Table 4.9
and 4.10.
• Procedure to call up the display using DD
(HART 7) and DTM (HART 7)
[Dynamic Variables]
DD (HART 7)
DTM (HART 7)
[Root Menu] → Process variables
→ Output vars → PV →
→ PV Data
Quality
Good, Poor Accuracy, Manual/
Fixed, or Bad is displayed.
→ PV Limit
Status
Constant, Low Limit, High Limit, or
Not Limited is displayed.
It is the same about the SV, TV, and QV.
[Device Variables]
DD (HART 7)
DTM (HART 7)
[Root Menu] → Process variables
→ Device variables and Status →
→ Flow Data
Quality
Good, Poor Accuracy, Manual/
Fixed, or Bad is displayed.
→ Flow Limit
Status
Constant, Low Limit, High Limit, or
Not Limited is displayed.
It is the same about the Pres, SP, ET, Total Flow, %
Range, and Loop Current. .
(4) Time Stamp
Time Stamp displays the date and the time
information which EJX multivariable transmitter
maintains from the time of the power on.
It is used as the additional information of the
process value and the event.
• Procedure to call up the display using DD
(HART 7) and DTM (HART 7)
DD (HART 7)
DTM (HART 7)
[Root Menu] → Diag/Service →
Status → Time Stamp
→ Current Date It shows the number of operating
days.
→ Current Time It shows the running time.