PLCopen Motion Control specs, Part 4, underway



First public draft of PLCopen’s Motion Control specifications, Part 4–Interpolation—is planned for April 2006.

Part 4 of PLCopen ’s evolving suite of Motion Control specifications reportedly got off to a good start at a kick-off meeting held at Siemens AG in Nuremberg, Germany, on July 13-14, 2005. Goal of Part 4, “Interpolation,” is to define a set of extensions to “Part 1-PLCopen Function Blocks for Motion Control” and “Part 2-Extensions,” which focus on coordinated multi-axis motion in 3-D space, according to PLCopen’s managing director, Eelco van der Wal.

Specification Part 1 and 2 deal with single axis and a master/slave type of coordinated motion control, such as electronic camming and gearing. “For three-dimensional movements, one goes beyond this point via the grouping of a set of axes, without a master,” said van der Wal. Grouping the axes provides a user-friendly interface and solves specific problems associated with multi-axis systems. As an example, van der Wal cited that in case of an error with existing master/slave axes, other coupled axes are not made aware of the error and continue their movement. “By combining axes in a group one knows upfront which axes are involved and has the basis for a better error behavior,” he adds. “Interpolation brings working in motion control to a new level.”

Illustrating the added complexity of working in 3-D space, several coordinate systems are applicable (axes system, machine system, and product-related system), along with a kinematic model of the associated system mechanics. Moreover, the kinematic model normally resides in a separate software tool, such as a CAD or simulation system, explains van der Wal, “An interface is provided to incorporate such a model in the application program.”

With Part 4 underway, the current suite of PLCopen’s Motion Control specifications comprises:

  • Part 1 - PLCopen Function Blocks for Motion Control

  • Part 2 - Extensions

  • Part 3 - User Guidelines

  • Part 4 - Interpolation

  • Part 5 - Homing Extensions

Frank J. Bartos, executive editor

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.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
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.
Make Big Data and Industrial Internet of Things work for you, 2017 Engineers' Choice Finalists, Avoid control design pitfalls, Managing IIoT processes
Engineering Leaders Under 40; System integration improving packaging operation; Process sensing; PID velocity; Cybersecurity and functional safety
Mobile HMI; PID tuning tips; Mechatronics; Intelligent project management; Cybersecurity in Russia; Engineering education; Road to IANA
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

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

SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Flexible offshore fire protection; Big Data's impact on operations; Bridging the skills gap; Identifying security risks
The digital oilfield: Utilizing Big Data can yield big savings; Virtualization a real solution; Tracking SIS performance
click me