Real-time Profinet soon available for high-end motion control

The Profibus Trade Organization (PTO) reports that it will release its Profinet Isochronous Real-Time (IRT) extension for high-performance motion control applications within 18 months.


The Profibus Trade Organization (PTO) reports that it will release its Profinet Isochronous Real-Time (IRT) extension for high-performance motion control applications within 18 months. This extension will complement the existing Profinet Soft Real-Time (SRT) announced in October 2003 for general automation applications. Profinet SRT provides cycle times of 5 to 10 milliseconds to satisfy the demands of factory automation. It is fully compatible with the TCP/IP Ethernet protocol and reportedly brings the industry's first real time solution to Ethernet users. The run time software is available on the Profibus Web site .

Profinet IRT will deliver 1-millisecond synchronization for more than 150 axes of control. It reportedly will be more powerful than any currently available real-time solution, but will remain fully compatible with TCP/IP protocols and Ethernet PHY layers. Profinet IRT will work with any Ethernet TCP/IP network without restriction or limitation.

PTO’s parent organization, Profibus International, adds that it’s already made significant progress on the IRT extension, which is based on requirements initiated and now documented in white papers jointly prepared by Beckhoff, Bosch-Rexroth, Danfoss, ifak, SEW and Siemens. The schedule for IRT development is:

  • Profidrive V 3.1 profile will be adopted and engineering and test/certification items will be finalized by mid-2004;

  • Pilot devices will be completed by 4Q04; and

  • Finished products are expected to be available by mid-2005.

Profinet IRT will use next-generation switching technology with real-time ASIC switches for implementing Profinet IRT in products quickly and easily, so additional switches will not be required. The onboard ASIC switches include two hardware options currently under development. Designed for embedding in field devices, these ASICs provide two-port or four-port Ethernet switching capability. For ASIC chip specifications visit

In addition, the ASIC switch allows construction of interrupt-free redundant solutions for complex applications at very low additional cost. The objective includes porting the Profibus motion control profile largely unchanged to Profinet as an important contribution to protecting existing Profibus investments.

Interested parties also can download a new Profinet Technology and Application Guide . For more information, visit the Web site .

—Jim Montague, news editor, Control Engineering,

No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Controller programming; Safety networks; Enclosure design; Power quality; Safety integrity levels; Increasing process efficiency
Additive manufacturing benefits; HMI and sensor tips; System integrator advice; Innovations from the industry
Robotic safety, collaboration, standards; DCS migration tips; IT/OT convergence; 2017 Control Engineering Salary and Career Survey
Featured articles highlight technologies that enable the Industrial Internet of Things, IIoT-related products and strategies to get data more easily to the user.
This article collection contains several articles on how automation and controls are helping human-machine interface (HMI) hardware and software advance.
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Mobility as the means to offshore innovation; Preventing another Deepwater Horizon; ROVs as subsea robots; SCADA and the radio spectrum
Future of oil and gas projects; Reservoir models; The importance of SCADA to oil and gas
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me