Fisher FIELDVUE DVC6200 Instruction Manual page 70

DVC6200 Digital Valve Controller
Device Diagnostics
Note
Device Diagnostics are not available
for instrument level AC.
Alert Conditions (2-1)
Instrument Alert Conditions, when enabled, detect
many operational and performance issues that may be
of interest. To view these alerts, from the Online menu
select Device Diagnostics, and Alert Conditions. The
alert conditions for each group of alerts are listed
below. If there are no alerts active for a particular
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group the group will not be displayed on the Field
Communicator. See table 6-1 for alert groups.
D Electronics— If an electronics alert is active it
will appear under ELECT ALERTS.
Drive Current
Drive Current Alert—This alert is indicated when the
drive current does not read as expected. If this alert
occurs, check the connection between the I/P
converter and the printed wiring board assembly. Try
removing the I/P converter and re-installing it. If the
failure does not clear, replace the I/P converter or the
printed wiring board assembly.
Drive Signal
Drive Signal Alert—This alert is indicated when the
Drive Signal is greater or less than the expected
maximum or minimum.
Processor Impaired
Offline/Failed Alert—This alert is indicated if a
failure, enabled from the Self Test Shutdown menu,
caused an instrument shutdown. Press Enter to see
which of the specific failures caused the Offline/Failed
indication.
Low Power Write Alert— This alert is activated if a
write to the instrument is attempted when the loop
current is less than approximately 3.5 mA.
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.
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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 and the travel sensor adjustment.
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.
September 2010