Emerson Process Management PAC manual Modbus Protocol, ControlWave Open Network Connectivity

Models: PAC

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Product Data Document

420DS-1k

July 16, 2007 - Page 13

Bristol® ControlWave® PAC

Primary and Background polling scheme

OPC Alarm & Event Server support

ControlWave Open Network Connectivity

By embracing the open system network technolo- gies available through TCP/IP, Ethernet, OPC, and Microsoft DNA, as well as pseudo standards such as Modbus and Open Modbus, ControlWave can provide a total Process Automation Management Solution for in-plant LAN based networks and WIde Area Network SCADA systems.

With the exceptional connectivity provided by the ControlWave network, access to real-time data and operating conditions, historical data, maintenance and performance data are all available to the global network. ControlWave provides the needed infor- mation to the plant floor technician, operator, engi- neer, supervisor and corporate management, even external customers.

Communication Protocols

Like all of Emerson’s products, Bristol ControlWave supports BSAP (Bristol Standard Asynchronous Protocol), Modbus, DFI, CIP, DNP3 and serial ASCII as standard functions. These protocols are imple- mented in Flashware so no additional hardware

is required to use any one or a combination of all protocols.

BSAP Protocol

All Emerson’s Bristol Network 3000 and ControlWave RTU and controller products support BSAP protocol. BSAP is widely accepted as provid- ing exceptional data integrity and greatly simpli- fies communication between controllers. BSAP is provided with interfaces for Master/Slave, vertical networks, and Client/Server, horizontal networks. In either case, variable lists are created in each con- troller that are easily passed from server to client or slave to master.

BSAP meets the definition of an industry-standard, open architecture protocol because it conforms to ISO standards 2629, 1745 and 2111, it is not propri- etary in that Emerson does not charge a license fee and makes the protocol and documentation avail-

able to anyone.

While BSAP is an open protocol, the added func- tionality of the messages provide much more capa- bility than is found in other networks.

Global time-synchronization

Time-stamped Alarm reporting

Historical archive data transfer

Audit file transfer

On-line program editing

Diagnostics

Communication statistics

Modbus Protocol

Modbus - Modbus is often considered a de-facto standard protocol because of its broad usage as either the primary or a secondary offering in many measurement and control related products. Even with its common use, Modbus protocol actually has many variations. Consider Modbus RTU and Modbus ASCII, Master & Slave, Serial and TCP/IP Open Modbus. In addition, there are considerations regarding supported function codes, floating point values and byte order. ControlWave supports the following:

Modbus serial and TCP/IP Open Modbus (Ethernet)

Master and slave

Modbus RTU and ASCII

Modes 1 - 7, 8, 15 & 16

IP modes 51, 52, & 53

Integer and IEEE 4 byte floating point

Generic Serial Interface

The Generic Serial Interface is a user program- mable Master and Slave protocol used to send and receive messages typically with third party serial ASCII devices. This protocol can be used to inter- face with such devices as message boards, card readers and many measurement devices.

Remote Automation Solutions

Website: www.EmersonProcess.com/Remote

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Emerson Process Management PAC manual Modbus Protocol, ControlWave Open Network Connectivity, Communication Protocols

PAC specifications

Emerson Process Management's PAC, or Process Automation Controller, represents a significant innovation in the field of industrial process control. As industries increasingly seek to optimize efficiency, reduce costs, and enhance productivity, PACs have emerged as pivotal in achieving these goals. Emerson's PAC combines the reliability and precision needed for critical process control applications with flexible architectures that cater to diverse industrial environments.

One of the standout features of Emerson’s PAC is its robust architecture, which allows for the integration of various control strategies and protocols. This flexibility ensures that it can adapt to both continuous and batch processes, making it an ideal choice for a wide range of industries, including oil and gas, pharmaceuticals, food and beverage, and chemical manufacturing. The system supports multiple communication protocols, enabling seamless integration with existing systems, sensors, and devices.

In addition to its flexible architecture, Emerson's PAC is equipped with advanced software capabilities that enhance operational efficiency. The intuitive user interface is designed to simplify the user experience, allowing operators to easily navigate through complex control environments. The built-in analytics tools aid in real-time monitoring and performance evaluation, enabling prompt responses to any operational issues that may arise. Moreover, the system is designed with cybersecurity features to safeguard critical data and prevent unauthorized access, an essential consideration in today's interconnected industrial landscapes.

Emerson's PAC is powered by advanced technologies that provide high-speed processing and extensive data handling capabilities. This ensures that operators receive timely alerts and can perform quick analysis, leading to informed decision-making and improved productivity. The use of cloud computing further enhances the capabilities of PAC by enabling remote access and management, thereby eliminating the limitations of traditional onsite controls.

In summary, Emerson Process Management's PAC embodies cutting-edge technology tailored for modern industrial needs. Its main features, including flexible architecture, user-friendly software, high-speed processing, and robust security, position it as a reliable solution for enhancing process automation. As industries continue to evolve, Emerson’s PAC will undoubtedly play a critical role in shaping the future of process management, ensuring that organizations can operate efficiently and stay competitive in an increasingly complex market.