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Honeywell HC900 manual Modbus/TCP Framing

Models: HC900

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Components and Architecture - Ethernet Devices/Considerations

Note: PDE communications, discussed previously, do not use the PC host connection sockets. PDE communications are separate from (and are transmitted concurrent with) PC host-to-controller communications.

The PC host can include software that closely relates to and supports controller functioning and can also include other software that is related remotely or not at all. Closely related software can include:

Either

Hybrid Control Designer - for generating and managing configuration files,

Or

HMI (Supervisory/Data Acquisition Software) or Operator Panel with Modbus/TCP driver

Or

Both configuration and HMI software (and or panel)

All communications between a controller and a PC host use Open Modbus/TCP protocol, whose widespread use is making it an industry standard. Modbus/TCP is basically an adaptation of the Modbus messaging structure that uses TCP/IP for a message carrier. Modbus messaging is available in two versions: ASCII, in which each eight-bit byte is sent as 2 ASCII characters, and RTU, in which each byte is sent as two four-bit hexadecimal characters. Each Modbus message frame is embedded into a TCP/IP datagram as indicated in Figure 14.

Figure 14 - Modbus/TCP Framing

The HC900 Controller uses either Modbus/TCP or Modbus RTU. The Modbus mapping structure for the HC900 Controller is based on the mapping structure employed in Honeywell’s UMC800 Controller, and the function codes and methods for parameter access are also virtually identical.

From an implementation and installation aspect, the use of the Modbus protocol for HC900 Controller configuration differs from the use for Controller-to-HMI communications. The Hybrid Control Designer configuration package, which is supplied by Honeywell, is ready for use as soon as it is installed. This package uses a subset of Modbus function codes that provide for very efficient and secure configuration transactions. Communications details are transparent to the user; all communication drivers are included with the package, and no mapping or other detailed setup is required.

HMI Supervisory/SCADA software is available from various suppliers, and functionality and setup requirements vary with suppliers and with specific products. In all cases, the software selected must be compatible with Open Modbus/TCP protocol.

The user can use the standard Modbus command set to generate a custom set of drivers for his specific application, or may purchase additional software (for example, OPC with Modbus /TCP protocol) to reduce or virtually eliminate development tasks.

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HC900 Hybrid Controller Installation and User Guide

Revision 5

 

 

9/03

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Honeywell HC900 manual Modbus/TCP Framing
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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.