Emerson Fisher™ FIELDVUE™ DVC2000 Digital Valve Controller Instrument Shutdown

Measured Variable Units and Ranges

Follow the prompts on the handheld communicator to define the following measured variables

units and ranges:

• Analog In Units – Permits defining the Analog Input Units in mA or percent of

4 to 20 mA range.

• Input Range Hi – Permits setting the Input Range High value. Input Range High should

correspond to Travel Range High, if the Zero Control Signal is configured as closed. If the

Zero Control Signal is configured as open, Input Range High corresponds to Travel Range

Low. See Figure 1.

• Input Range Lo – Permits setting the Input Range Low value. Input Range Low should

correspond to Travel Range Low if the Zero Control Signal is configured as closed. If the

Zero Control Signal is configured as open Input Range Low corresponds to Travel Range

High. See Figure 1.

• Pressure Units – Defines the output and supply pressure units in either psi, bar or kPa.

• LUI Pressure Units – Enter the pressure units displayed on the local user interface; psi, bar

or kPa.

• Temp Units – Degrees Fahrenheit or Celsius. The temperature measured is from a sensor

mounted on the digital valve controller's printed wiring board.

Self Test Failures for Instrument Shutdown

Upon shutdown, the instrument attempts to drive its output pressure to the zero current

condition and no longer executes its control function. In addition, the appropriate failure

statuses are set. Once the problem that caused the shutdown has been fixed, the instrument

can be restarted by cycling the power or selecting Restart from the Mode menu of the

handheld communicator. Also see the Viewing Instrument Status section on page 35 for

further details about failures.

Follow the prompts on the handheld communicator display to determine the self test

shutdown criteria from the following:

• Done – Select this if you are done modifying the self test shutdown criteria.

• Flash ROM Fail – When enabled, the instrument shuts down whenever there is a failure

associated with flash ROM (read only memory).

• Temp Comp Fail – When enabled, the instrument shuts down whenever this is a failure

associated with Temperature Compensation.

• Ref Voltage Fail – When enabled, the instrument shuts down whenever there is a failure

associated with the internal voltage reference.

• Drive Current Fail – When enabled, the instrument shuts down whenever the drive current

does not read as expected.

• NVM Fail – When enabled, the instrument shuts down whenever there is a failure

associated with NVM (non-volatile memory).

• Temp Sensor Fail – When enabled, the instrument shuts down whenever there is a failure

associated with the internal temperature sensor.

• Press Sensor Fail – When enabled, the instrument shuts down whenever there is a failure

associated with the pressure sensor.

• Travel Sensor Fail – When enabled, the instrument shuts down whenever there is a failure

associated with the travel sensor.