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Honeywell DCP200 manual Sensor Break Pre-Set Power, Temperature

Models: DCP200

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DCP200 Profile Controller & Recorder - Product Manual

Self-Tune

Self-Tune continuously optimises tuning while a controller is operating. It uses a pattern recognition algorithm, which monitors the control deviation. The diagram shows a typical application involving a process start up, setpoint change and load disturbance.

Setpoint 2

Temperature

Setpoint 1

Load Disturbance

Setpoint Change

Time

Figure 53. Self-Tune Operation

The deviation signal is shown shaded, and overshoots have been exaggerated for clarity. The Self-Tune algorithm observes one complete deviation oscillation before calculating a new set of PID values. Successive deviation oscillations cause the values to be recalculated so that the controller converges on optimal control. When the controller is switched off, these PID terms are stored, and are used as starting values at the next switch on. The stored values may not always be ideal, if for instance the controller is brand new or the application has changed. In these cases, the user can utilise Pre-Tune to establish new initial values. Self-Tune will then fine-tune these values as it monitors any control deviation.

Use of continuous self-tuning is not always appropriate. For example applications which are frequently subjected to artificial load disturbances, for example where an oven door is likely to be frequently left open for extended periods, can lead to errors in the calculations. In addition, because Self-Tune tunes for full PID control, it is not recommended for valve control applications, which normally require PI control.

Self-Tune cannot be engaged if the instrument is set for On-Off Control.

Also refer to: Control Deviation, Modulating Valves. On-Off Control, Pre-Tune, PI, PID, Setpoint and Tuning.

Sensor Break Pre-Set Power

If a thermocouple or RTD breaks, or it is disconnected, the instrument detects this condition within 2 seconds, and sets the control output(s) to the value defined by the Sensor Break Pre-Set Power Output parameter in the Control Configuration sub-menu. Process alarms behave as though the PV has gone high.

Non-zero based linear inputs (e.g. 2 to10V or 4 to 20mA, but not 0 to 20mA) can also detect a sensor break condition, setting the power to the Pre-Set Power value. Process alarms behave as though the PV has gone low.

Also refer to: Input Range, Linear Input, RTD and Thermocouple.

51-52-25-150, Issue 1 – April 2009

Glossary

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Honeywell DCP200 manual Sensor Break Pre-Set Power, Temperature
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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.