Instruction Manual
D103409X012
Viewing Device Variables and Diagnostics
May 2013
88
Non‐Critical NVM Alert—This alert is indicated if the checksum for data, which are not critical for instrument
operation, has failed.
Critical NVM Alert—This alert is indicated when the Non‐Volatile Memory integrity test fails. Configuration data is
stored in NVM. If this failure is indicated, restart the instrument and see if it clears. If it does not clear, replace the
printed wiring board assembly.
Flash ROM Alert—This alert indicates that the Read Only Memory integrity test failed. If this alert is indicated, restart
the instrument and see if it clears. If it does not clear, replace the printed wiring board assembly.
Reference Voltage Alert—This failure is indicated whenever there is a failure associated with the internal voltage
reference. If this alert is indicated replace the printed wiring board assembly.
Internal Sensor Out of Limits—This alert is indicated if there is a possible problem with either the pressure sensor or
the printed wiring board assembly submodule.
Variable Out of Range—This alert is indicated if there is a possible problem with one or more of the following: the
Analog Input Signal, the I/P converter submodule, the pneumatic relay submodule, or the printed wiring board.
Field device malfunction—The alert is indicated if the pressure, position, or temperature sensors are providing invalid
readings.
D Sensor— If a sensor alert is active it will appear under SENSOR ALERTS.
Travel Sensor
Travel Sensor Alert—This alert is indicated if the sensed travel is outside the range of -25.0 to 125.0% of calibrated
travel. If this alert is indicated, check the instrument mounting. Also, check that the electrical connection from the
travel sensor is properly plugged into the printed wiring board assembly. After restarting the instrument, if the alert
does not clear, troubleshoot the printed wiring board assembly or travel sensor.
Pressure Sensors
Pressure Sensor Alert—This alert is indicated if the actuator pressure is outside the range of -24.0 to 125.0% of the
calibrated pressure for more than 60 seconds. If this alert is indicated, check the instrument supply pressure. If the
failure persists, ensure the printed wiring board assembly is properly mounted onto the Module Base Assembly, and
the pressure sensor O‐rings are properly installed. If the alert does not clear after restarting the instrument, replace the
printed wiring board assembly.
Note
The pressure sensor alert is used for output A, output B, and the supply pressure sensor. Check the pressure values to see which
sensor is causing the alert.
Temperature Sensor
Temperature Sensor Alert—This alert is indicated when the instrument temperature sensor fails, or the sensor reading
is outside of the range of -40 to 85_C (-40 to 185_F). The temperature reading is used internally for temperature
compensation of inputs. If this alert is indicated, restart the instrument and see if it clears. If it does not clear, replace
the printed wiring board assembly.
D Environment— If an environment alert is active it will appear under ENVIRO ALERTS.
Supply Pressure
Supply Pressure Lo Alert—This alert is indicated when supply pressure is lower than the configured limit.
Aux Terminal Alert
Aux Terminal Alert—This alert is set when the auxiliary input terminals are either open or closed, depending upon the
selection for the Auxiliary Input Alert State.
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