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.

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.

Command 3 provides the following variables:

• Primary variable – analog input in % or mA

• Secondary variable – travel target (valve set point) in % of ranged travel

• Tertiary variable – output pressure in psig, bar or kPa

• Quaternary variable – travel in % of ranged travel

To enable burst mode, select Mode > Burst > Burst Enable. To send a burst mode command,

select Burst Command. Burst mode must be enabled before you can change the burst

mode command.

For the handheld communicator to be able to communicate with a device whose polling

address is not 0. it must be configured to automatically search for all or specific connected

devices.

• LUI Language – Select the language to be displayed on the local user interface; English,

French, German, Italian, Spanish, Chinese or Japanese.

General Information

Follow the prompts on the handheld communicator to enter or view information in the

following fields:

• HART Tag – Enter an up to 8 character HART tag for the instrument. The HART tag is the

easiest way to distinguish between instruments in a multi-instrument environment. Use

the HART tag to label instruments electronically according to the requirements of your

application. The tag you assign is automatically displayed when the Field Communicator

establishes contact with the digital valve controller at power-up.

• Message – Enter any message with up to 32 characters. Message provides the most

specific user-defined means for identifying individual instruments in multi-instrument

environments.

• Descriptor – Enter a descriptor for the application with up to 16 characters. The descriptor

provides a longer user-defined electronic label to assist with more specific instrument

identification than is available with the HART tag.

• Date – Enter a date with the format MM/DD/YY. Date is a user-defined variable that provides

a place to save the date of the last revision of configuration or calibration information.

• Valve Serial Num – Enter the serial number for the valve in the application with up to

12 characters.

• Inst Serial Num – Enter the serial number on the instrument nameplate, up to

12 characters.

• Polling Address – If the digital valve controller is used in point-to-point operation, the

Polling Address is 0. When several devices are connected in the same loop, such as for split

ranging, each device must be assigned a unique polling address. The Polling Address is

set to a value between 0 and 15. To change the polling address, the instrument must be

Out Of Service.

Restarting the Instrument

Restart resets the instrument in the same manner as when power to the instrument is

interrupted. When Restart is issued, all of the newly entered configuration variables become

active. Otherwise, they may not take effect until the instrument is placed In Service.

Burst Mode

Enabling burst mode provides continuous communication from the digital valve controller.

Burst mode applies only to the transmission of burst mode data (analog input, travel target,

pressure and travel) and does not affect the way other data is accessed.

Access to information in the instrument is normally obtained through the poll/response of

HART communication. A handheld communicator or control system may request any of the

information that is normally available, even while the instrument is in burst mode. Between

each burst mode transmission sent by the instrument, a short pause allows the handheld

communicator or control system to initiate a request. The instrument receives the request,

processes the response message and then continues “bursting” the burst mode data.

There are four burst mode commands. Command 3 is recommended for use with the

Rosemount™ 333 HART Tri-Loop™ HART-to-analog signal converter. The other three are not

used at this time.

Restart Control Mode

Restart Control Mode (Restart Cont Mode) lets you choose which operating mode you want the

instrument to be in after a restart. Follow the prompts on the handheld communicator display

to define the restart control mode as Resume Last, Analog or Digital.

Access to information in the instrument is normally obtained through the poll/response of

HART communication. A handheld communicator or control system may request any of the

information that is normally available, even while the instrument is in burst mode. Between

each burst mode transmission sent by the instrument, a short pause allows the handheld

communicator or control system to initiate a request. The instrument receives the request,

processes the response message and then continues “bursting” the burst mode data.

There are four burst mode commands. Command 3 is recommended for use with the

Rosemount™ 333 HART Tri-Loop™ HART-to-analog signal converter. The other three are not

used at this time.

Control Mode

You can change the control mode by selecting Control Mode from the Mode menu or press

the Hot Key and select Control Mode.

Control Mode lets you define where the instrument receives its set point. Follow the prompts

on the handheld communicator display to choose one of the following control modes: Analog

or Digital.

Choose Analog if the instrument is to receive its set point over the 4 to 20 mA loop. Normally,

the instrument control mode is Analog.

Choose Digital if the instrument is to receive its set point digitally, via the HART

communications link.

A third mode, Test, is also displayed. Normally, the instrument should not be in the Test

mode. The handheld communicator automatically switches to this mode whenever it needs to

stroke the valve, for example during calibration or stroke valve. However, if you abort from a

procedure where the instrument is in the Test mode, it may remain in this mode. To take the

instrument out of the Test mode, select Control Mode then select either Analog or Digital.

Detailed Setup

The DVC2000 digital valve controller has the capability to communicate via the HART

protocol. This section describes the advanced features that can be accessed with a handheld

communicator. Table 3 lists the default settings for a standard factory configuration. Table 4

provides the actuator information required to setup and calibrate the instrument.

Instrument Mode

You can change the instrument mode by selecting Instrument Mode from the Mode menu or

press the Hot Key and select Instrument Mode.

Instrument Mode allows you to either take the instrument Out Of Service or place it In Service.

Taking the instrument Out Of Service allows you to perform instrument calibration and also

allows you to change setup variables that affect control, provided the calibration/configuration

protection is properly set. See Setting Protection.

Terminology

Instrument Level – There are four (4) levels of functionality available: AC, HC, AD and PD.

AC – This level provides the capability to setup and calibrate the positioner through the local

user interface or a handheld communicator.

HC – This level provides additional capability for advanced configuration of the positioner

(such as travel limits/cutoffs, custom characterization and minimum open/closing time).

Also, information is available through the HART protocol for diagnostic alerts such as travel

deviation, cycle count and travel accumulation.

AD – This level provides advanced diagnostic capabilities for performance testing. When used

with ValveLink software, instrument health can be evaluated with tests such as Valve Signature,

step response and dynamic error band. The software program provides detailed analysis

with graphics.

PD – This level provides automated, non-intrusive testing of the operating performance of

the control valve assembly. When used with ValveLink software, tests to isolate component

degradation can be run on the valve assembly without affecting the process.

Local Interface – The DVC2000 comes standard with a Liquid Crystal Display (LCD) and four (4)

pushbuttons. The local interface provides the capability to setup and calibrate the positioner

and view basic diagnostic messages.

Magnet Assembly – This is the feedback component that is mounted directly to the valve stem.

It supplies a magnetic field that is sensed by the digital valve controller.

Options Board – The DVC2000 digital valve controller is available with two (2) limit switches

and a valve position transmitter. The options board includes the additional circuitry and

terminations that are required to support these output signals.

Pole Piece – Inserted into the DVC2000 housing and protruding through the back of the

instrument is a two-pronged fork that houses the magnetic sensor for position feedback.

Instrument Description

The DVC2000 digital valve controller is a communicating, microprocessor-based

current-to-pneumatic valve positioner. It is designed to replace standard pneumatic and

electro-pneumatic valve positioners.

In addition to the traditional function of converting an input current signal (4 to 20 mA) to a

pneumatic output pressure, the DVC2000 digital valve controller communicates via a local

display panel and/or via the HART® protocol. An option is available which provides isolated

circuitry for two (2) integrated limit switches (for open/close valve indication) and a valve

position transmitter (for separate valve position feedback).

Magnet Assembly – This is the feedback component that is mounted directly to the valve stem.

It supplies a magnetic field that is sensed by the digital valve controller.

Options Board – The DVC2000 digital valve controller is available with two (2) limit switches

and a valve position transmitter. The options board includes the additional circuitry and

terminations that are required to support these output signals.

Pole Piece – Inserted into the DVC2000 housing and protruding through the back of the

instrument is a two-pronged fork that houses the magnetic sensor for position feedback.