DCP200 Profile Controller & Recorder - Product Manual

Modulating Valve

A valve that can be positioned anywhere between fully closed and fully open by means of an incorporated motor. A typical application would be controlling temperature in a furnace heated by gas burners. This instrument can control modulating valves that have a positioning circuit. These require proportional (mA or VDC) control signal from a linear output, relative to the desired valve position. PI control is used for valve control.

To directly control the valves ‘open’ and ‘close’ motor windings, a special Valve Motor Drive (VMD) controller algorithm is required. This instrument does not currently support this type of algorithm.

Also refer to: Linear Output, PI Control, Proportional Control and Valve Motor Drive Control.

Multi-Point Scaling

If the process input is connected to a linear input signal, multi-point scaling can be enabled in the Input Configuration sub-menu. This allows the linearization of a non-linear signal.

The Scale Range Upper & Lower Limits define the values shown when the input is at minimum and maximum values, and up to 15 breakpoints can scale input vs. displayed value between these limits. It is advisable to concentrate these break points in the area of the range that has the greatest amount of non-linearity, or the area of particular interest in the application.

Also refer to: Input Configuration, Linear Input, Process Input, Scale Range Lower Limit and Scale Range Upper Limit.

mVDC

This stands for millivolt DC. It is used in reference to the linear DC millivolt input ranges. Typically, these will be 0 to 50mV or 10 to 50mV

Also refer to: Auxiliary Input, Input Range, Linear Input, mADC, Process Variable and VDC

On-Off Control

When operating in On-Off mode, the control output(s) will turn on or off as the process variable crosses the setpoint in a manner similar to a central heating thermostat. Some oscillation of the process variable is inevitable when using On-Off control.

On-Off control can be implemented only with Relay, Triac or SSR driver outputs. On-Off operation can be assigned to the Primary output alone (secondary output not present), Primary and Secondary outputs or Secondary output only (with the primary Output set for time proportional or current proportional control). On-Off Control is selected by setting the corresponding proportional band(s) to On-Off.

Also refer to: On-Off Differential, PID, Process Variable, Primary Proportional Band, Secondary Proportional Band, Relay, Setpoint, SSR Driver, Time Proportioning Control and Triac.

On-Off Differential (On-Off Hysteresis)

A switching differential, centred about the setpoint, when using On-Off control. Relay ‘chatter’ can be eliminated by proper adjustment of this parameter, but too large a value may increase process variable oscillation to unacceptable levels. On-Off differential is also know as hysteresis or deadband.

Settings = 0.1% to 10.0% of input span.

Default value = 0.5%.

Also refer to: Input Span, On-Off Control, Process Variable, Relay and Setpoint

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Glossary

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Honeywell DCP200 manual Modulating Valve, Multi-Point Scaling, Mvdc, On-Off Control, On-Off Differential On-Off Hysteresis

DCP200 specifications

The Honeywell DCP200 is an advanced distributed control platform designed to enhance efficiency, reliability, and flexibility in industrial automation. With a robust architecture capable of supporting a wide range of applications, the DCP200 is perfect for sectors including oil and gas, chemical processing, power generation, and manufacturing.

One of the key features of the Honeywell DCP200 is its scalability. It can be easily expanded to accommodate increasing demands, making it suitable for both small operations and large enterprises. This flexibility allows industries to adopt the system gradually, integrating it into their existing processes without substantial downtime or a steep learning curve.

The DCP200 is built on open standards, facilitating seamless integration with third-party systems and equipment. This compatibility ensures that companies can leverage existing infrastructures and investments, fostering a more cohesive operational environment. Enhanced interoperability is achieved via industry-standard communication protocols, enabling devices to communicate fluently across diverse platforms.

Another significant characteristic of the DCP200 is its powerful data acquisition and processing capabilities. The system utilizes state-of-the-art data analytics tools to monitor real-time information, enabling better decision-making and predictive maintenance. This proactive approach helps in reducing downtime, optimizing performance, and ultimately driving operational excellence.

The DCP200 system supports a wide range of input and output options, ensuring it can interface with various sensors, actuators, and control devices. This adaptability contributes to its function as a central hub for industrial monitoring and control, enhancing data visibility and operational responsiveness.

Security is a top priority for Honeywell, and the DCP200 employs robust cybersecurity measures to protect critical infrastructure. The system includes advanced authentication protocols and data encryption techniques, safeguarding sensitive information from unauthorized access and potential cyber threats.

User experience is also a focal point of the DCP200. The platform features an intuitive graphical user interface that simplifies navigation and enhances operator engagement. Customizable dashboards provide at-a-glance insights into system performance, aiding both operators and management in identifying areas for improvement.

In conclusion, the Honeywell DCP200 is an innovative distributed control platform that marries flexibility, scalability, and security. With its comprehensive feature set and commitment to seamless integration, it stands as a vital tool for companies aiming to enhance their automation efforts and drive operational success in an increasingly complex industrial landscape.