Operating Characteristics - Controller Modes

 

 

Table 21 - Controller Behavior in Mode Transition

 

 

 

 

 

Initial Mode

New Mode

Controller Behavior

 

 

 

 

 

PROGRAM

RUN

Validate configuration database.

 

 

 

Reset all I/O scanners.

 

 

 

Upon startup, initiate Cold Start sequence.

 

 

 

Diagnostic: Identify and configure all I/O racks and modules. (All

 

 

 

output modules are configured with Failsafe values. Any modules

 

 

 

not included in the configuration are configured with default values,

 

 

 

which causes outputs to be Off.)

 

 

 

While in transition, all output modules are Off; when transition

 

 

 

procedures are completed, Function Block processing begins, and

 

 

 

output values are set to Function Block output values.

 

 

 

Any calibration process that was in progress is immediately aborted,

 

 

 

and the results are discarded.

 

 

 

 

 

PROGRAM

OFFLINE

Same as PROGRAM to RUN transition, except that Function Blocks

 

 

 

are not processed, and outputs remain Off.

 

 

 

Any calibration process that was in progress is immediately aborted,

 

 

 

and the results are discarded.

 

 

 

 

 

RUN

PROGRAM

Set all channels of all output modules to Off.

 

 

 

Set all output module Failsafe values to the Off state.

 

 

 

Turn off the LED indications on all output modules.

 

 

 

 

 

OFFLINE

PROGRAM

Same as RUN to PROGRAM transition.

 

 

 

Any calibration process that was in progress is immediately aborted,

 

 

 

and the results are discarded.

 

 

 

 

 

RUN

OFFLINE

Freeze output module channels.

 

 

 

Freeze Force LED indications on all output modules.

 

 

 

 

 

OFFLINE

RUN

Function Block execution starts immediately.

 

 

 

Any calibration process that was in progress is immediately aborted,

 

 

 

and the results are discarded.

 

 

 

 

Revision 5

HC900 Hybrid Controller Installation and User Guide

113

9/03

 

 

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Honeywell HC900 manual Controller Behavior in Mode Transition, Initial Mode New Mode Controller Behavior

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.

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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.