Hanover Fair 2: How Did PROFINET Get a Speed Upgrade

May 9th, 2012

Three techniques are employed to give PROFINET its speed boost to a 31.25 microsecond cycle time: fast forwarding, Dynamic Frame Packing, and fragmentation.

Fast Forwarding

Every microsecond counts.  When a PROFINET frame passes through an Ethernet switch in a linear topology, the switch examines the frame to see if it should forward it or use it.  So we moved the ID closer to the beginning of the frame.  Now it can examine it sooner and know what to do with it sooner.

Dynamic Frame Packing

What if I could drop off a message for device 1 and not have it stay in the traveling PROFINET frame?  That’s what Dynamic Frame Packing does.  It’s like a delivery truck.  The truck drops off a package at my office and its load is a little lighter as it drives to the next stop.

Fragmentation

Unlike fragmentation of a disk drive, this fragmentation is good fragmentation!  A full size Ethernet Frame will take 125 microseconds on a 100Mbit/sec network.  If we did not fragment, we could not achieve 31.25 microseconds.  So fragmentation is just chopping up Ethernet frames at the beginning of a string of PROFINET devices and reassembling them at the end.

All this to benefit the one percent of the market that needs it.  Why is it that the one percent always gets special treatment?  But at least with PROFINET the 99 percent are not penalized.  (But we still want you to occupy PROFINET.)

Here is an animated presentation of Fast Forwarding, Dynamic Frame Packing, and Fragmentation:

More news from Hanover Fair is still to come.

–Carl Henning

Hanover Fair 2: PROFINET Speed Upgrade

May 2nd, 2012

One of the displays in Hanover Fair’s Field Communication Lounge (described in an earlier post) showed how a new Siemens chip supported the PROFINET speed upgrade.  First, a little background:

The PROFINET specification that this is based on is PROFINET version 2.3 which was released in late 2010.  The speed upgrade was one of the improvements over the previous version.  The other notable improvement was enabling process automation over PROFINET.  I should also note that we think version 2.3 of PROFINET will not require updating for quite some time.  That’s because PROFINET represents the communication protocol while we use application profiles that reside above the communication layer to arrange the data.  Examples of application profiles include PROFIenergy and PROFIsafe.  (For a more detailed explanation of profiles read “PROFILE Technology and Application – System Description.”)

 Ok, back from the digression, here’s Wolfgang Schroeder to talk you through the demo:

Although this demo featured Siemens’ ERTEC 200P chip, other suppliers of silicon are offering this functionality; Hilscher’s netX and Phoenix Contact’s TPS-1 for starters.  Multiple suppliers – another advantage of an open standard.

Speaking of open, did you notice that Wolfgang showed that the network was still open to normal TCP/IP traffic – the camera in the demo.

In passing, it was noted that the way PROFINET achieves this speed increase has three parts: fast forwarding, dynamic frame packing, and fragmentation.  More details on those in the next post.

–Carl Henning

Hanover Fair 2012

May 1st, 2012

Hanover Fair concluded last Friday after 190,000 visitors had trouped through the 5,000 exhibits (from 69 countries).  Twenty of the Halls were occupied, but I never made it out of Hall 9 with most of my time spent in the Field Communication Lounge, the stand cosponsored by PI.

Five digital communications organizations cooperated to create the Field Communication Lounge.  To introduce you to the Lounge here’s Birte Hasselbusch, who coordinated that effort.  Birte works in the PI Support Center:

The organizations’ displays were intermixed throughout the Lounge, intermingled with member companies’ displays.  Here’s the floor plan (and yes there is refreshment area tucked away in the back):

Field Communication Lounge Floor Plan

click for larger image

The tag line for the Lounge was “See. Learn. Compare. Implement.” And you could certainly do the first three right in the Lounge.  But what was missing, in my opinion, was a statement that tied the five organizations’ technologies together… or differentiated them.  So here is my notion of how they are related:

PI’s PROFIBUS PA and Fieldbus Foundation’s H1 compete directly.  Each has its advantages.

PI’s PROFINET and Fieldbus Foundation’s HSE (kind of) compete.  They’re both Industrial Ethernets, but PROFINET has more functions, more installations, higher speed, and more products.

PI’s PROFIBUS PA, Fieldbus Foundation’s H1, and HART Communication Foundation’s HART compete, but personally I see HART, PROFIBUS PA, and even H1 as complementary to PROFINET.  In fact, the three organizations worked together in the Wireless Cooperation Team to unify their approach to wireless in the process market.

Speaking of cooperating, add OPC Foundation and FDT Group to PI, FF, and HCF and you have the FDI Cooperation.  Today FDT/DTM technology competes with EDDL technology.  The goal of the FDI Cooperation is to create a single, converged technology.

In summary, I see PROFINET as the system backbone connecting upward via OPC and downward directly to some devices and via proxies to PROFIBUS, FF H1, and HART (especially WirelessHART).  And, for asset management functions: FDT/DTM technology and EDDL technology eventually converging into FDI.

[Admittedly this is a very PI-centric view, but then this is the PROFIblog. And Comments are open for 30 days so others can weigh in.]

Glossary of European trade show lingo:
Fair or Messe = Trade Show
Hall = Building
Stand = Booth

More Hanover Fair news to be posted soon.

–Carl Henning

Engineer’s Holiday

April 11th, 2012

No PROFIBUS or PROFINET in this post; it’s off those topics, but still engineering related.  A Sightseer’s Guide to Engineering lists six engineering sights to see in Arizona.  With this past weekend’s travels I’ve now seen five.  (I have not been to Kitt Peak National Observatory yet – although I have been to the Lowell Observatory, where Pluto was discovered, a number of times and blogged about one trip.  In fact, I was even there a couple times while Pluto was still a planet.)  This trip included visits to the Titan Missile Museum and the Asarco Mission Mine (and Mill).

Here is the missile from beside the blast doors looking down into the silo:

Titan II in Silo

And here’s part of the control panel:

Missle Control Panels

I could not get close enough to see who made what on the control panels.  But the guidance system was from Delco and the limit switches and pushbutton stations throughout the facility were from Allis Chalmers.

Radiation Survey MeterAnd finally another relic of the cold war, a radiation survey meter, not a Geiger counter.  Unlike a Geiger counter the survey meter only detects high levels of radiation, so no Uranium prospecting with this meter.  I could have bought a survey meter for $39.95, but resisted.  I also resisted the genuine surplus Fallout Shelter signs like those that used to adorn my elementary school.

At the Asarco Mission Mine we got a view of the 2 by 2.5 mile open pit copper mine and of the mill:

Copper Mill

In the visitor center was more electrical equipment including this Hoope’s Bridge for measuring electrical conductivity:

Hoopes Bridge

If you are interested in old instruments, and you haven’t already clicked the Lowell Observatory link above, there are some interesting instruments there, too.

I also toured the not-on-the-list Biosphere 2 where the “control room” was a computer station.  And saw the “natural engineering” of Kartchner Caverns.  And since I was that close to Willcox, AZ (and now we are way, way off topic), I got to visit the Marty Robbins and Rex Allen museums and on the way home, the Tom Mix memorial.

While I was enjoying my tours, my grandson Morgan was watching Boeing build airplanes – cool!  Maybe after the Portland PROFINET class, I can make it up there for a tour.  But today I’m traveling and tomorrow you can “meet me in St. Louis, Louis, meet me at the fair…” er, the PROFINET one-day training class.

–Carl Henning

Global PROFINET Standardization

April 9th, 2012

If you make an automation device, it can be shipped globally.
If you make a machine, it can be shipped globally.
If you make a consumer product, it can be manufactured globally.

One of the “5 Criteria for choosing an Industrial Ethernet” is global support that is local.  PROFINET is supported all over the world and is a national standard where that is appropriate (like China and Korea).  Recently Korea announced the adoption of PROFINET and PROFIBUS as national standards:

Korean Standards PI ODVA EtherCAT
Industrial Ethernet PROFINET Ethernet IP EtherCAT
Factory Fieldbus PROFIBUS DP    
Process Automation PROFIBUS PA    

China has already adopted PROFIBUS and PROFINET as national standards.

So PROFIBUS and PROFINET are standardized nationally and internationally.  How are they supported globally?  PROFIBUS and PROFINET International (PI) has four types of organizations distributed around the world:

1. Regional PI Associations (RPAs) – 27
2. PI Competence Centers (PICCs) – 43
3. PI Training Centers (PITCs) – 23
4. PI Test Labs (PITLs) – 10

PICCs, PITCs, and PITLs are certified by PI and audited every two years for conformance to the PI quality standard.  No other fieldbus/Industrial Ethernet organization has this many Competence Centers – in fact none of the others even have the concept of a competence center!

PI Global Organizations

For even more reasons for you to standardize on PROFINET, read “Ford Powertrain Standardizes on PROFINET.”

–Carl Henning

Replace PROFINET Device No Computer Needed!

March 27th, 2012

What if you could replace an IO device on a PROFINET network without using a computer?  Surprise, there is no what-if here – you can do this now.  And there are no addressing switches to set either.  Oh, and the network keeps running the whole time, too.

We demonstrate this Simple Device Replacement feature in our PROFINET one-day training classes and I guess we’ve become too blasé about it.  It is really worthy of the “Wow” comment we got on a Course Evaluation form in Birmingham last month: “When Hunter replaced the component without any computer changes, WOW!!  Plug and go. Even a third shift maintenance man can do it! Simple and impressive!”

Here are the complete instructions for using this feature:

  1. disconnect and remove the defective device
  2. replace and reconnect the new device

Really, that’s all.

Ok, there are a few caveats: the replacement device has to be the same as the device it’s replacing.  No surprise there; you can’t replace a drive with an IO block.  And since PROFINET uses names, not numbers, the replacement device has to have a blank name (which it will from the factory).

In the background, to make Simple Device Replacement work, a veritable alphabet soup of standards comes into play: SNMP, LLDP, and DCP.  Come to one of our PROFINET one-day training classes and we’ll explain all those.

I always think of the breadth of PROFINET (discrete, process, motion, safety, etc.), but this is a reminder of the depth of PROFINET (Fast StartUp, iPar Server, Tool Calling Interface, Simple Device Replacement, etc.)  Wow!

–Carl Henning

PROFINET Executive Leadership Forum Day 2

March 9th, 2012

Day 2 of the PROFINET Executive Leadership Forum featured presentations from

  • Raj Batra, President, Industry Automation Division at Siemens
  • Bernie Anger, General Manager Control and Communication Systems at GE Intelligent Platforms
  • Michael Bastian, Controls Manager at Ford Motor Company (Powertrain Division)
  • Joerg Freitag, Chairman of PI
  • Tom Koulopoulos

The press has already reported in depth on these presentations, but I’ll add my take-aways:

Raj talked about “The Era of Big Data.”  Bernie added that you should record all data… even if you don’t know what you will do with it… you will eventually find a use for it.  When I was involved with historians we would have been nervous about that concept, but 10 years have passed since then.  Tom had a lot to say about data and interconnectedness too.

Raj also introduced the need for flexibility.  No longer does one line make one product.  Mike Bastian expanded on that in talking about Ford’s requirements.  Their major strategic initiatives were “global standardization, flexibility, and acceleration.”  When Mike saw the hodgepodge of automation systems and networks, he knew that standardization was needed.  His boss was even more vociferous in that need; he wanted everything standardized down to the lead in the pencil that signed off on the standards!  Mike’s example of flexibility was a transmission line that had to make two different transmissions.  The time frame for introducing new products is being compressed so project acceleration rounds out the Ford initiatives.  And if they add a third transmission to replace an existing one, the line cannot be out of service for the transition.

Standardization permeated many of the presentations.  Raj talked about PROFINET as the backbone of TIA.  Mike Bastian noted that having standardized on PROFINET, they told their suppliers that they must use PROFINET.  Bernie elaborated on GE’s reasons to standardize on PROFINET: Performance, Robustness, and Ecosystem.  Performance of one millisecond updates for thousands of nodes.  Robustness from redundant media (and bumpless changeover), rich diagnostics, and device replacement with no software needed.  The Ecosystem includes support tools, support organization, many products from many vendors, and application profiles.  Application profiles provide a means of organizing data without impacting the communications protocol.

My favorite quote from Bernie Anger: “Automation is a great enabler of competitiveness.”

The press contingent at the Forum has already begun to report on the event.  Here’s what’s out there so far (with more to come):

Travis Hessman in Industry Week: 3 Key Factors in Manufacturing Success

Peter Welander in Control Engineering: Are there too many industrial networking protocols? (with video)

Dave Greenfield in Automation World: Why GE Intelligent Platforms Chose Profinet

Bill Lydon at Automation.com: Manufacturing Innovation discussed at PROFINET Executive Leadership Forum

Keith Larson at Control Design: Profinet Gathers Momentum as Single Manufacturing Network

–Carl Henning

PROFINET Executive Leadership Forum

March 6th, 2012

The PROFINET Executive Leadership Forum was held on February 23 and 24 in Miami.  PI North America members GE Intelligent Platforms and Siemens cosponsored the event with us.  The Forum provided a platform for PROFINET suppliers and users to highlight how PROFINET supported their efforts to innovate.  Here’s how PI North America Executive Director Michael Bryant introduced the Forum:

We are here to learn how and, more importantly, why two industry giants have come together to support one open industry standard. Siemens and GE compete in major verticals like medical, turbines, wind power, and industrial automation.  But each has decided to base their technology innovation on a network backbone of PROFINET.  They’ve each chosen PROFINET as not just another Industrial Ethernet, but as their only Industrial Ethernet.  Another PI North America Board member, Phoenix Contact, supports other Industrial Ethernets, but uses PROFINET as their exclusive solutions backbone.

The very foundation upon which PROFINET sits profited from the same cooperative promotion in the early 80’s that is happening in this room today. I am talking of course about Ethernet. Xerox, Digital Equipment, and Intel all got together to promote Ethernet as a standard. What happened as a result? They were able to dominate proprietary systems.

In manufacturing, we talk a lot about innovation—but what we really want to know is, what are the top-tier companies doing to innovate? And if my company adopts an innovative solution, how can I be sure it is based on proven technology that delivers results?

Today, Siemens and General Electric, whose combined global footprint comprises about $250 billion in sales, will answer those questions. We’ll learn how innovative technologies impact global leadership. And we’ll learn specifically why PROFINET was chosen as the innovative networking standard, and why you, too, can trust PROFINET.

After the welcome reception and Mike’s introduction, Dave Greenfield presented some results from the Automation World Innovation Survey.  I liked the response to the survey question: “What do you consider to have been the most innovative development in automation technology over the past 10 years?”  The most frequent answer: “Integration of Ethernet at the system and device level.”

Panel at PROFINET Executive Leadership Forum

Dave then ably moderated a panel discussion that included an end user, an OEM, and two System Integrators.  The OEM said they eliminated 3 to 4 other buses and just use PROFINET without the need for gateways.  Multiple members of the panel made comments about IT.  “IT owns down to the switches; Automation, below that.”  “PROFINET benefits from IT tools.”  “Users of PROFINET benefit from IT knowledge.”  Unlike serial fieldbuses, Ethernet provides common ground between IT and Automation.  “Involve IT from the beginning!”  A surprising comment was that MES is driving adoption of Industrial Ethernets like PROFINET.  Flexibility, ease-of-use, expandability, and determinism were also cited as PROFINET benefits.

Then it was time for dinner and a great chance to network.  News from day 2 to follow soon…

–Carl Henning

More PROFINET Videos

February 17th, 2012

Sometimes one minute is not enough to find out about PROFINET.  For those occasions, try some more detailed videos from the PROFI Interface Center, featuring Hunter Harrington.  Start with the Introduction:

Then continue to the first detailed video (more to come):

And don’t miss Hunter in person at the PROFINET one-day training classes.

–Carl Henning

Gotta Minute?

February 9th, 2012

Gotta minute?  You can learn a lot about PROFINET in a minute.  Inspired by MinutePhysics, PI North America is pleased to present <drum roll please> MinutePROFINET.  Two videos are available so far:

An introduction:

An overview of PROFINET Architecture:

Be sure to watch the PROFIblog or subscribe to the YouTube MinutePROFINET Channel for updates.

Now for a rare behind-the-scenes peak at the MinutePROFINET studio.  Here in sunny Scottsdale, Arizona is PI North America Studio 3B:

This is where the magic high-speed hand of our own Michael Bowne animates.  For the narration, we have engaged the professional velvet tones of… Michael Bowne.  (You can also see and hear the MinutePROFINET star on the road at all the PROFIBUS one-day training classes where he is available to sign autographs with that magic hand… for a nominal fee.)

–Carl Henning