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Reference Manual
00809-0100-4021, Rev DA
November 2004
Rosemount 3144P
3-38
HART
LCD Display The LCD display displays abbreviated diagnostic messages for
troubleshooting the transmitter. To accommodate two-word messages, the
display alternates between the first and second word. Some diagnostic
messages have a higher priority than others, so messages appear according
to their priority, with normal operating messages appearing last. Messages on
the Process Variable line refer to general device conditions, while messages
on the Process Variable Unit line refer to specific causes for these conditions.
A description of each diagnostic message follows.
Table 3-3. LCD Display Error Warning Descriptions
Message Description
[BLANK] If the meter does not appear to function, make sure the transmitter is configured for the meter option you desire.
The meter will not function if the LCD Display option is set to Not Used.
FAIL -or- HDWR FAIL This message indicates one of several conditions including:
The transmitter has experienced an electronics module failure.
The transmitter self-test has failed.
If diagnostics indicate a failure of the electronics module, replace the electronics module with a new one.
Contact the nearest Emerson Process Management Field Service Center if necessary.
SNSR 1 FAIL -or-
SNSR 2 FAIL
The transmitter has detected an open or shorted sensor condition. The sensor(s) might be disconnected,
connected improperly, or malfunctioning. Check the sensor connections and sensor continuity.
SNSR 1 SAT -or-
SNSR 2 SAT
The temperature sensed by the transmitter exceeds the sensor limits for this particular sensor type.
HOUSG SAT The transmitter operating temperature limits (–40 to 185 °F (40 to
85 °C)) have been exceeded.
LOOP FIXED During a loop test or a 4–20 mA output trim, the analog output defaults to a fixed value. The Process Variable
line of the display alternates between the amount of current selected in milliamperes and “WARN.” The Process
Variable Unit line toggles between “LOOP,” “FIXED,” and the amount of current selected in milliamperes.
OFLOW The location of the decimal point, as configured in the meter setup, is not compatible with the value to be
displayed by the meter. For example, if the meter is measuring a process temperature greater than 9.9999
degrees, and the meter decimal point is set to 4 digit precision, the meter will display an “OFLOW” message
because it is only capable of displaying a maximum value of 9.9999 when set to 4 digit precision.
HOT BU Hot Backup is enabled and Sensor 1 has failed. This message is displayed on the Process Variable line and is
always accompanied by a more descriptive message on the Process Variable Unit line. In the case of a Sensor
1 failure with Hot Backup enabled, for example, the Process Variable line displays “HOT BU,” and the Process
Variable Unit line alternates between “SNSR 1” and “FAIL.”
WARN DRIFT ALERT Drift Alert warning is enabled and the difference between Sensor 1 and Sensor 2 has exceeded the
user-specified limit. One of the sensors may be malfunctioning. The Process Variable line displays “WARN” and
the Process Variable Unit line alternates between “DRIFT” and “ALERT.”
ALARM DRIFT ALERT The analog output is in alarm. Drift Alert alarm is enabled and the difference between Sensor 1 and Sensor 2
has exceeded the user-specified limit. The transmitter is still operating, but one of the sensors may be
malfunctioning. The Process Variable line displays “ALARM” and the Process Variable Unit line alternates
between “DRIFT” and “ALERT.”
ALARM The digital and analog outputs are in alarm. Possible causes of this condition include, but are not limited to, an
electronics failure or an open sensor. This message is displayed on the Process Variable line and is always
accompanied by a more descriptive message on the Process Variable Unit line. In the case of a Sensor 1 failure,
for example, the Process Variable line displays “ALARM,” and the Process Variable Unit line alternates between
“SNSR 1” and “FAIL.”
WARN The transmitter is still operating, but something is not correct. Possible causes of this condition include, but are
not limited to, an out-of-range sensor, a fixed loop, or an open sensor condition. In the case of a Sensor 2 failure
with Hot Backup enabled, the Process Variable line displays “WARN,” and the Process Variable Unit line
alternates between “SNSR 2” and “RANGE.”