YOKOGAWA DPharp EJXC40A, Руководство пользователя

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<7. HART Communication>
7-29
IM 01C25W05-01EN
(3) Data quality and limit status
This transmitter can handle differential pressure
(DP), module 1 side pressure (Pres 1), module
2 side pressure (Pres 2), module 1 side capsule
temperature (Temp 1), module 2 side capsule
temperature (Temp 2), PV % value (PV % rnge),
and current signal (Loop current). Each variable
includes data quality and limit status, which provide
useful information about data values. Data quality is
normally “Good.” However, if the sensor is bad or if
measurements are outside the range, data quality
changes to “Bad” or “Poor Accuracy.” Limit status
indicates whether data values exceed certain limits
(example no response to process). If the limit status
is “Constant,” this indicates that the value does not
change. For details, see Tables 8.7.
• Recalling data quality and limit status
Recall
parameters
[Root menu] → Process variables →
Device Vars and Status →
DP Data
Quality
Good, Poor Accuracy, Manual/Fixed, or
Bad is displayed.
DP Limit
Status
Constant, Low Limit, High Limit, or Not
Limited is displayed.
The same holds true for Pres 1, Pres 2, Temp 1,
Temp 2, PV % rnge, and Loop current.
(4) Timestamp
Date and time information that the transmitter
retains after power-on is displayed. It is used as
additional information for process values and
events.
• Recalling timestamps
Recall
parameters
[Root menu] → Diag/Service → Status
→ Time Stamp
Current Date The number of running days is
displayed. (January 1, 1970 is the
operation start date.)
Current Time The running time is displayed.
NOTE
Timestamps are reset when the power is turned
on.
(5) Number of configuration changes
When you change parameters or perform
calibration, the event is counted as a configuration
change and saved as history. This value is never
reset or written to when the power is turned off.
• Recalling the number of configuration changes
Recall
parameters
[Root menu] → Diag/Service → Status
→
Cfg chng
count
The number of configuration changes is
displayed. This value cannot be reset.
(6) Resetting the configuration change flag
This method can be used to reset the configuration
change flag.
NOTE
The configuration change flag is Configuration
Changed (0x40) of the device status. See Table
8.5.
• Recalling configuration change flag reset
Recall
parameters
[Root menu] → Diag/Service → Status
→ Reset Cfg chng flag (method)
7.3.1.4 NE107 Status Information
Alarm information is divided into four groups on
the basis of NE107. The status is displayed on the
alarm screen of the HART configuration tool.
NE107 Status
Group
Device Status
F Failure Part failure, device failure, total
failure
C Function
Check
Output signal temporarily invalid
due to local operation, manual value
input, etc.
S Out of
specification
The device is operating outside the
specifications.
The measured value is undefined
due to improper process or
environment.
M Maintenance
required
Maintenance is required in the near
future or in a certain amount of time.