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36
TTH300
HEAD-MOUNT TEMPERATURE TRANSMITTER | OI/TTH300-EN REV. G
… 10 Operation
Process display
1
Measuring point tagging (Device
TAG)
2
Current process values
3
‘Button function’ symbol
4
‘Parameterization protected’
symbol
Figure 24: Process display (example)
The process display appears on the LCD display when the device
is powered on. It shows information about the device and
current process values.
The way in which the current process values are shown can be
adjusted on the configuration level.
The symbols at the bottom of the process display are used to
indicate the functions of the operating buttons
and
, in
addition to other information.
From SW-Rev. 3.00, two process variables can also be optionally
displayed: one is displayed on top of the other.
Symbol
Description
Call up information level.
Call up configuration level.
The device is protected against changes in the parametrization.
Error messages in the HART® LCD display
In the event of an error, different information appears
depending on the revision:
• To SW-Rev. 1.03: A symbol or letter (Device Status) and a
number (DIAG.NO.)
• As of SW-Rev. 3.00: Corresponding device status symbol
and associated diagnostics group.
Process display
To SW-Rev. 1.03
Application F72
Process display
From SW-Rev. 3.00
Sensor
The diagnostic messages are divided into the following groups
in accordance with the NAMUR classification scheme:
Symbol
letter*
Status
symbols
according to
NAMUR NE
107**
Description
I
not
applicable
OK or Information
Device is functioning or
information is available
C
Check Function
Device is undergoing
maintenance (for
example simulation)
S
Off Specification
Device or measuring point is
being operated outside of
the specifications
M
Maintenance Required Request service to prevent
the measuring point from
failing
F
Failure
Error; measuring point has
failed
* To SW-Rev. 1.03
** From SW-Rev. 3.00