Honeywell DCP200 manual Alarm Inhibit, Alarm Types, Automatic Reset

Models: DCP200

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DCP200 Profile Controller & Recorder - Product Manual

Alarm Inhibit

Alarm Inhibit prevents unwanted process or deviation alarm activation at power-up or when the controller setpoint is changed. The alarm activation is inhibited until a ‘Safe’ condition is present. The alarm operates normally from that point onwards. E.g. if inhibited, a low alarm will not activate at power-up, until the process has first risen above the alarm point and then

falls back below.

 

Settings = Inhibit or not inhibited for each alarm.

Default value = None Inhibited.

Also refer to: Alarm Types and Alarm Operation.

Alarm Types

There are four basic alarm types, Process Alarms, Control Deviation Alarms, Rate of Signal Change Alarms and Event Based Alarms.

Process Alarms are based on the absolute value of the Process Variable. If the PV rises above a high alarm value, or falls below a low alarm value, the alarm will become active. Deviation Alarms are based on the value of the Control Deviation error. If the PV is more than the high deviation alarm value above setpoint, or more than the low deviation alarm value below setpoint, the alarm will become active.

Rate Of Signal Change Alarms are based on the rate of change of the PV. If the rate of change is greater than the alarm value for longer that the Minimum Duration time, the alarm will activate.

Event based alarms activate when the condition for that alarm type is true. These can be Signal Break, Low Memory Or Loop Alarms.

Also refer to: Alarm Operation, Band Alarm Value, Control Deviation, Deviation Alarm, Loop Alarm, Process High Alarm, Process Low Alarm, Process Variable, Rate Of Change Alarm, and Setpoint.

Alternative Setpoint

The instrument can have up to two setpoints. Local Setpoint 1 and/or an Alternative Setpoint. The Alternative Setpoint can be chosen from Local Setpoint 2 or a remote setpoint input from Auxiliary Input A or B if either of these are fitted. One setpoint can be chosen as the active at using the Setpoint Selection.

Also refer to: Auxiliary Input, Local Setpoints, Remote Setpoints; Setpoint and Setpoint Select.

Auto Pre-Tune

When the Auto Pre-Tune is enabled, a Pre-Tune activation is attempted at every power-up (standard Pre-Tune activation rules apply). Auto Pre-Tune is useful when the process to be controlled may vary significantly each time it is run. Auto Pre-Tune ensures that the process is tuned correctly each time the process is started. Self-Tunemay also be engaged to fine- tune the controller.

Settings = Enabled or Disabled.

Default value = Disabled.

Also refer to: Pre-Tune,Self-Tune, PID and Tuning.

Automatic Reset

-Refer to Integral Action

51-52-25-150, Issue 1 – April 2009

Glossary

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Honeywell DCP200 manual Alarm Inhibit, Alarm Types, Automatic Reset

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.