Diagnostic Messages: Warning - Emerson Rosemount 644 Reference Manual

Reference Manual
00809-0200-4728, Rev RA
Table 6-2. Status: Failed – Fix Now
Alert name LCD screen LOI screen
CONFG
SNSR 1
Invalid
Configuration
WARN
ERROR
ALARM
DEVICE
Field Device
Malfunction
ALARM
FAIL
(1) Sensor 1 is used here as an example. If Dual Sensors are ordered this alert can apply to either sensor.
6.4.2

Diagnostic messages: Warning

Alert name LCD screen LOI screen
HOT BU
SNSR 1
™
Hot Backup
Active
HOT BU
WARN
DRIFT
Sensor Drift
(1)
Alert Active
WARN
ALERT
WARN
SNSR 1
Sensor
(1)
Degraded
DEGRA
SNSR 1
Troubleshooting
Problem
CONFG
The Sensor Configuration
SNSR 1
(type and/or connection)
does not match the sensor
WARN
output and is invalid.
ERROR
ALARM
DEVICE
The device has
malfunctioned or needs
immediate attention.
ALARM
FAIL
Problem
HOT BU
Sensor 1 has failed (open or
SNSR 1
shorted) and Sensor 2 is
now the primary process
HOT BU
variable output.
FAIL FAIL
WARN
The difference between
DRIFT
Sensor 1 and 2 has gone
beyond the user-configured
WARN
Drift Alert Threshold.
ALERT
WARN
The resistance of the
SNSR 1
thermocouple loop has
exceeded the configured
threshold. This could be
DEGRA
caused by excess EMF.
SNSR 1
Section 6: Troubleshooting
Recommended action
1. Verify sensor type and number of wires
matched the Sensor Configuration of the
device.
2. Reset the device.
3. If error persists, download the
transmitter configuration.
4. If error still present, replace the
transmitter.
1. Perform a processor reset.
2. View other alerts to see if the
transmitter indicates a specific problem.
3. If the condition persists, replace the
device.
Recommended action
1. Replace Sensor 1 at you earliest
convenience.
2. Reset Hot Backup feature in the device
software.
1. Verify sensor connections are valid on
the transmitter.
2. If necessary, check calibration of each
sensor.
3. Verify process conditions match
sensor outputs.
4. If calibration fails, one of the sensors
has failed. Replace it at your earliest
convenience.
1. Check terminal connections on the
644 terminal screws for corrosion.
2. Check the thermocouple loop for any
signs of corrosion in terminal blocks,
wire thinning, wire breaks, or faulty
connections.
3. Verify the integrity of the sensor itself.
Harsh process conditions may cause
long-term sensor failures.
April 2015
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