Category: Emerson

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.

Measuring range

Range: Continuously adjustable via configuration software

Vrms (metric) = 5 – 100 mm/s (±25 to ±500 µm)

Vrms (Imperial) = 0.197 in/sec to 3.937 in/sec (±0.984 mils to ±19.685 mils)

Frequency range: 10 – 1000 Hz (VDI 2056. DIN 4566. ISO 3945)

Selectable frequency ranges: 5 – 50 Hz, 10 – 50 Hz, 50 – 1000 Hz, or 50 – 1600 Hz

Lift coil current: 0 – 8 mA, adjustable in 40 μA steps

Lift coil current accuracy: ±0.5% of full scale range, ±0.5% of set value

Maximum allowable load: 3.4 kΩ at 2 mA

Minimum dynamic input voltage: 311 mV peak to peak

Maximum dynamic input voltage: 9500 mV peak to peak

Sensor power supply:

Individually buffered sensor power supply

Galvanically isolated from all system voltages and system supply voltages.

Protected against open and short circuits

Features:

• Dual-channel, 3U-sized, 1-slot plug-in module that cuts cabinet space

requirements in half compared to traditional four-channel 6U cards

• API 670-compliant hot-swappable modules

• Remotely selectable limit multiplication and trip bypass

• Pre- and post-buffered and proportional outputs, 0/4-20 mA outputs, 0 – 10 V outputs

• Use with electric (electromechanical) sensors 9266. 9267. or 9268

Sensor Inputs

Number of inputs: two independent channels

Input Type: Electro-mechanical, Differential

Emerson sensor inputs: Part No. 9266. 9267. or 9268

Isolation: Galvanically isolated from power supply

Input resistance: >100 kΩ

Input voltage range: – 5 – +15 VDC

Input frequency range:

Lower cut-off frequency 1 or 5 Hz

Upper cut-off frequency 50 – 2000 Hz adjustable

Plug and Play Components. The system power supply assembly fits into any

power slot of any DeltaV power supply/controller carrier.

This not only simplifies system design, but also reduces spare parts inventory through interchangeability.

DIN-Rail Mounting. Power supply installation is simple.

Mount the power supply/controller carrier on the T-shaped DIN rail.

Then plug the system power supply into the carrier.

Internal Power Bus. The power supply/controller carrier contains an internal power bus.

You do not need to use external cables to connect the system power supply

to the DeltaV controller and I/O interface carriers.

Modular power supplies. You know the power requirements for today,

but what about the future? Build a solid foundation now and build on it later.

Modular power architecture allows you to install additional power supplies for controllers and I/O

subsystems.

Precision outputs. System power supplies accept a wide range of power

inputs and convert the inputs into precise power outputs.

Power Redundancy: DeltaV system power supplies can be redundant on a 1-to-N basis, while other

systems are 1-to-1.

This provides an economical solution for creating system redundancy.

Fault Detection. Undervoltage and overvoltage conditions are detected and logged to protect

the controller and I/O subsystems and to automatically cold-start the controller in the event of a high-

capacity power failure.

Standards compliance. The power supply is EMC and CSA compliant.

It is designed to comply with European ‘Power Factor Correction’ standards.

Immediate notification of power failure. The internal relay outputs change state and alert

the user if the input voltage fails or the system power fails.

In addition, an LED on the power supply housing displays the status of the power supply.

System and Field Power Isolation. The system power supply provides isolation

between the system power supply and the field power supply when the system

power supply and the field power supply are powered by the same 24-volt DC bulk power system.

Power Supply Removal. The system power supply is easy to remove/replace.

The bulk power cord connects to an easy-to-install connector instead of screw terminals.

Product Description

The DC/DC System Power Supply is used to power DeltaV controllers and I/O interfaces

from a 12 or 24V DC bulk power supply that can be mounted next to the controller

in the power supply/controller carrier and provides the 5 and 3.3V DC power required by the controller.

It provides 5V and 3.3V DC power for the controller.

It also provides 12 VDC power for the I/O interfaces and up to 8 amps when powered from a 24 VDC bulk

power supply.

Plug and Play Components. The system power supply assembly fits into any

power slot of any DeltaV power supply/controller carrier.

This not only simplifies system design, but also reduces spare parts inventory through interchangeability.

DIN-Rail Mounting. Power supply installation is simple.

Mount the power supply/controller carrier on the T-shaped DIN rail.

Then plug the system power supply into the carrier.

Internal Power Bus. The power supply/controller carrier contains an internal power bus.

You do not need to use external cables to connect the system power supply

to the DeltaV controller and I/O interface carriers.

Modular power supplies. You know the power requirements for today,

but what about the future? Build a solid foundation now and build on it later.

Modular power architecture allows you to install additional power supplies for controllers and I/O

subsystems.

Precision outputs. System power supplies accept a wide range of power

inputs and convert the inputs into precise power outputs.

Power Redundancy: DeltaV system power supplies can be redundant on a 1-to-N basis, while other

systems are 1-to-1.

This provides an economical solution for creating system redundancy.