Emerson Fisher FIELDVUE DVC2000, Instruction Manual

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Basic Setup and Calibration
July 2009 3-13
Diagnostic Messages, Codes and
Details
The DVC2000 digital valve controller is constantly
diagnosing itself for abnormal conditions while
powered-up. The following messages will appear on
the local user interface if a fault condition exists
(identified on the default screen by the alert symbol
! ).
SWITCH 1 ???
SWITCH 2 ???—The alert symbol in conjunction with
the above text indicates that limit switch circuit 1 is not
powered, or at least one of the switches is enabled. In
order for either of the switches to work, switch circuit 1
must be powered. Switch 2 cannot be used alone. To
eliminate the alert symbol, you can either apply 5 to 30
VDC to switch circuit 1 or disable both switches from
DETAILED SETUP.
Once switch circuit 1 is powered properly, question
marks (???) will indicate that the corresponding switch
is disabled.
Shutdown Activated— This screen appears if the
positioner has shut down and no air is being delivered
to the actuator. Therefore, the valve is at its fail-safe
position. An example of a source of this error is corrupt
firmware code upon start-up. The factory default
setting for this error is disabled. Therefore, this alert
will only be enabled by actively configuring it with a
HART based host (e.g. Field Communicator, ValveLink
Software).
Travel Deviation— This error message indicates that
there is a difference between the input signal (after
characterization) and the actuator travel reading from
the position feedback element. The default setting is
7% for 5 seconds. These settings can be configured
through a HART communicating host on any
instrument HC tier or higher. Possible sources of this
error are insufficient air supply or excessive valve
friction.
Replace Main Board— A problem with the electronics
has been detected. Sources of this error may include
hardware or firmware problems. If this error is
detected, the instrument may be operational, but
performance will be degraded.
Check Mounting— The valve position feedback
reading is valid, but it is outside the operating range.
Sources of this error include loose or bent mounting
brackets or a misaligned magnet array. This error does
not identify faulty components, but rather faulty
installation or alignment. This alert is also called a
Travel Sensor Failure.
Check Supply— The valve is not able to reach its
target position due to insufficient supply pressure. This
error will most likely occur in conjunction with the
Travel Deviation error.
Check I/P Converter— A problem relating to the I/P
converter has been detected. Sources of this error
include:
Electronics problems indicated by the drive
current read back being out of range
Low supply pressure indicated by an active drive
signal alert
A stuck valve resulting in integrator wind-up.
Device Locked by HART— Another HART host
(e.g. ValveLink Software, AMS
Suite: Intelligent
Device Manager, or the 375 Field Communicator) is
communicating with the DVC2000. Typically this
means that the instrument is “out of service”. In
devices with firmware version 3 or later, you can clear
this message by holding down the left button while
cycling power to the DVC2000. This will place the
instrument back “in service.”
FIELDVUE Instruments—This is displayed when
there are no languages loaded on the DVC2000. This
could occur during firmware download.
Pressure = ???—The actuator pressure reading is
greater than 125% of the configured maximum supply
pressure. For example, if the supply pressure range
was set to 35 psi and the actual supply pressure was
45 psi, you will see ???’s when the DVC2000 is
delivering full supply pressure to the actuator. If you
reduce the supply pressure, or stroke the valve closed
(air-to-open/fail closed setup), eventually there will be
a point where numerical values appear.
This configuration parameter can be changed through
the Field Communicator (1-1-2-2-3) or ValveLink
Software (Detailed Setup
>
Pressure).
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