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Official Release
PLCopen
Safe Motion v1.0

 


booth C-1244


Official release
Creating PLCopen
Compliant Libraries
v1.0

 


PLCopen OPC-UA
Client v 1.1
now released



PLCopen
presentations
available

 


 

 


 

 




 

 

 

To: Subscribers PLCopen Newsletter
Subject: PLCopen newsletter Issue November 2008
 

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Welcome to the PLCopen electronic newsletter.

You receive this message because you subscribed to the PLCopen electronic newsletter via the PLCopen website www.plcopen.org.  
For comments or additional information check either www.plcopen.org or send an email to wendelien@plcopen.org.
To unsubscribe, send an email to wendelien@plcopen.org with the message to unsubscribe.
 

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What's new at PLCopen? A lot!

PLCopen is bustling with activities, read more in this in the following ezine.  

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PLCopen Newsletter - Issue November 2008.  

1. Meet us at SPS/IPC/Drives  

2. TC2 Motion Control - Part 4 Coordinated Motion about to be released

3. TC5 Safety works on last issues to release the update of the basic specification

4. TC4 Communication - OPC UA

5. TC6 XML - Version 2.0

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1. Meet us as SPS/IPC/Drives  

The SPS/IPC/Drives in Nuremberg, Germany, will take place from November 25-27.  
PLCopen will have a stand at this event and will present the following:

-         "PLCopen combines logic, motion, safety and exchange", Presentation at the SPS/IPC/Drives Forum program, Wednesday 26 November, 10:00 at Forum Hall 2, booth 2-461

-     "PLCopen XML V 2.0 – new features, generic approach, AutomationML", Press conference, Wednesday 26 November, 15:00 at CCN Ost, level 2, Istanbul  

Please visit our booth no. 660 in Hall 7.  

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2. TC2 Motion Control - Part 4 Coordinated Motion about to be released  

In April this year PLCopen released their Motion Control specification for Coordinated Motion as release for comments. With this publication, the committee could show their result for coordinated multi-axes motion in 3D space to a broader audience, and request them to check the usability of this in their environments. The feedback should overall increase the usability of the specification.  

Based on the comments received, PLCopen finalized the specification early November and can now publish the results and release Part 4 Coordinated Motion as version 1.0  

Other parts of the PLCopen Motion Control suite deal with master / slave motion control, a type of coordinated motion control where the master axis position is used to generate one or more slave axis position commands. For three dimensional movements, one goes beyond this point via a grouping of a set of axes, without a master axis. In order to work in 3D, one has to use several coordinated systems, as well as a kinematic model of the mechanics involved. The coordinated systems include the axes coordinate system, the machine coordinate system and the product related system.  

The current Master/Slave axes have the problem that if an error occurs, the other axes have no knowledge about this, 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.  

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3. TC5 Safety works on last issues to release the update of the basic specification  

The PLCopen Technical Committee 5 (TC5) deals with Safe Software. They published their first functional safety software standard in the beginning of 2006. Now an update is scheduled to be published, due to feedback from implementations as well as additional user wishes.  

The document itself provides a deep level of description. It does not only describe the functionalities, but also includes full state diagrams which add to the understanding, references to the applicable standards, description of error behavior, functional checks, and error codes, and identifies different programming levels. As such it is an ideal platform for implementers. For users, additional information on safety devices, connections and wiring is of course needed.  

The first five chapters of the specification contain the software model, the subset, and the concept of generic Function Blocks. The remainder two chapters define the specific Function Blocks, 20 in total, as well as the PLCopen certification procedure.  

Via this specification we help users to achieve their functional safety at the plant and machine level more easily and independent of the underlying architecture. The easy-to-use interface to the safety functionality supports this. The concepts will be (re-) usable in a wide range of applications, providing a common basis, terminology, and references. The accepted functionality and concepts will be approved by certification bodies, providing the basis for certifiable Function Blocks, User Levels and lower certification cost at the user.  

The official PLCopen safety software specification is expected to become available beginning 2009 for downloading free of charge at the PLCopen website www.plcopen.org.  

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4. TC4 Communication - OPC UA

Within TC4 PLCopen started cooperation with OPC UA to make it easier to interface the different tools used.

The kick-off meeting was held on October 14, where the working group objectives and the working plan (milestones) were discussed decided upon.

The overall goal of this cooperation is to define an IEC 61131-3 based information model as additional part of the overall OPC UA specification. Another objective is to define Communication Function Blocks representing OPC UA access methods in order to enable communication between PLCs during runtime.  

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5. TC6 XML - Version 2.0  

The PLCopen Technical Committee (TC6) - XML opened up the IEC 61131-3 development environments by specifying the XML schema for this. As such it provides an open interface to other software tools. PLCopen TC6 published their XML schema and documentation in June 2005 as version 1.01. After that, feedback came in from companies starting to implement this specification, not only from Europe but also from Japan.  

With a new initiative called AutomationML we have come to a new phase. The companies Daimler, ABB, KUKA, Rockwell, Siemens, netAllied and Zühlke together with the University of Karlsruhe and the University of Magdeburg jointly define and standardize the Automation Markup Language (AutomationML) as an intermediate format for the Digital Factory. For more information check www.automationML.org.

One of the formats that have been accepted in this group is PLCopen XML for the sequencing. In order to optimize this interface, additional changes to the specification were proposed.

These proposals now result in a new release of the PLCopen XML schema. This schema also includes previous feedback on this schema from other parties involved. With this release an optimization between the simulation and realization is created, creating more efficiency in automation. The release consist of a technical specification, the XML schema, and a document describing this schema, and can be downloaded free of charge from the website www.plcopen.org.  

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Kind regards,  

Eelco van der Wal
Managing Director PLCopen

PO Box
3009
NL 4200 EA Gorinchem, the Netherlands
tel.: +31-183-660261
fax: +31-183-664821  

email: evdwal@plcopen.org
Do not forget to look at http://www.plcopen.org