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Honeywell HC900 manual Operating Characteristics, Introduction Overview, Power Down / Power Up

Models: HC900

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Operating Characteristics - Introduction

Operating Characteristics

Introduction

This section provides insights into system functioning that are useful in configuration, in installation /commissioning tasks, and also in normal and abnormal operation. For related information regarding diagnostic indications, how they should be interpreted, and determining appropriate actions, refer to the Diagnostics section in this user manual.

Overview

The HC900 Controller components begin operation as soon as power is applied, and continue until power is removed. The operation of the system varies according to the following interacting factors:

•Power transitions: Power DOWN / Power UP

Power DOWN transitions are usually planned and controlled, but in some cases such as power outages, are unintended. To ensure proper operation in either case, the HC900 Controller includes software that controls operation at power restoration. The controller handles a Power-UP transition as one of two types: Cold Start or Warm Start

•Operating Modes: Program (Locked), Program, Offline, Run, and Run (Locked) Operating Modes are selected:

−by positioning the (Operating) Mode switch on the Controller Module, and,

−by selecting parameters on displays (operator interface, Hybrid Control Designer).

In some cases, mode transitions also restart (Cold Start or Warm Start) controller operation.

•Results of diagnostics: in case of system hardware or software fault, the controller automatically alters operation as appropriate for the diagnosed conditions.

Power Down / Power Up

The HC900 Controller is designed to facilitate restoration of process operation after a power outage. The active control configuration is maintained in battery-backed RAM, and the last configuration update performed in the program mode is also stored in Flash memory on the Controller Module. When power is restored, the system automatically enters a diagnostic procedure that checks the integrity of hardware, software, and the control database. Depending on the results of the diagnostic, the controller will execute either a Warm Start or a Cold Start.

Warm Start

A Warm Start is a restart of the control strategy using dynamic data that is stored in battery backed RAM to allow control action to resume exactly as it was before the restart. In the Warm Start procedure (flowcharted in the main flow of Figure 52), diagnostic testing proves the integrity of the hardware, software, and configuration database resulting in an automatic Warm Start of process control. Control action is resumed exactly as it was before the outage.

This flowchart also indicates actions that would be taken by the controller in case of fault. Notice that if primary diagnostic testing determines that RAM or firmware is faulty, all process control functions cease, and the Status LED (red color) strobes one blink, periodically. If RAM and firmware tests pass, but the database in RAM is faulty, the controller initiates the Cold Start operation.

Revision 5

HC900 Hybrid Controller Installation and User Guide

107

9/03

 

 

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Page 117
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Honeywell HC900 manual Operating Characteristics, Introduction Overview, Power Down / Power Up, Warm Start
Page 116 Page 118

HC900 specifications

The Honeywell HC900 is a robust control solution designed to meet the demands of process industries. This flexible and powerful platform provides a comprehensive set of features tailored for process control and monitoring applications. The HC900 is particularly suited for batch control, continuous processes, and discrete applications, making it a versatile choice for a variety of industries, including oil and gas, chemicals, and electricity generation.

One of the main features of the HC900 is its modular design. This allows users to customize their control systems by selecting from a range of I/O modules, communication options, and control strategies. The system supports both analog and digital inputs and outputs, enabling seamless integration with existing infrastructures. Additionally, the modular approach enhances scalability, allowing users to expand their systems as their needs evolve.

The HC900 is equipped with advanced control technologies, including adaptive control, multivariable control, and real-time data logging. These capabilities facilitate fine-tuned control over complex processes, improving efficiency and reducing waste. The system can manage multiple process loops simultaneously, providing operators with a holistic view of their operations.

Another significant characteristic of the HC900 is its intuitive user interface. The system features a graphical display that allows operators to monitor system performance easily and make adjustments quickly. This user-friendly design minimizes training requirements and encourages efficient operation across different experience levels.

Furthermore, the HC900 incorporates sophisticated data management tools. With built-in logging and reporting functions, users can track process variables and generate comprehensive reports for analysis and regulatory compliance. This data-centric approach fosters informed decision-making and enhances overall operational effectiveness.

From a communication standpoint, the HC900 supports a variety of protocols, making it compatible with many industry-standard devices. This interoperability ensures that users can integrate the HC900 into their existing systems without hassle, streamlining migration and upgrade processes.

Additionally, the HC900 is built with reliability in mind. Its rugged design ensures durability, capable of withstanding harsh environments while maintaining consistent performance.

In summary, the Honeywell HC900 stands out as a powerful and flexible control solution, equipped with modular design, advanced control technologies, and user-friendly interfaces that cater to the diverse needs of process industries. With its comprehensive data management capabilities and robust communications options, the HC900 is an excellent choice for organizations striving for efficiency and reliability.