Aug 5

Does PROFIsafe use up bandwidth?

This is a question we received at a recent PROFINET training class. Does PROFIsafe use up bandwidth? The answer is: “NO”. For a full description of PROFIsafe, read the PROFIsafe System Description. For a short refresher, watch this video: PROFIsafe is used to exchange data between a safety device (F-Device; e.g. emergency-stop button) and a…

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Apr 15

Drive it Safe with PROFINET

PI has released a new animated video showing PROFIsafe in action over PROFINET. (PROFIsafe works over PROFIBUS, too.) It presents the iPar Server for storing safety (and other) parameters. And it presents it more succinctly than I did in a blog post a couple years ago: iPar Server.  It also shows a brief look at…

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Feb 20

Safety Discussion

If you are not following some of the discussion groups on LinkedIn, you are missing out on some excellent advice. One in the Automation & Control Engineering group posed the question “Is Modbus suitable for emergency shutdown?” The short answer is no, of course not. But the discussion was interesting anyway. Naturally the topic of…

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Jan 28

Two Points for Safety

Two points for safety – not two points for A safety. The latter might be a Super Bowl prognostication. (It’s not. But I always thought of safeties in American football as rare, but according to Wikipedia: since 1932, a safety has occurred about once a week.) The former (and the blog post title) is a…

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Jun 4

Safety the Movie is Online

In February of 2007, Safety the Movie debuted in Phoenix (post: Safety the Movie debuts in Phoenix).  In the PROFIBUS and PROFINET world when we think functional safety, we think PROFIsafe.  Yet PROFIsafe only ensures message delivery.  An important role to be sure; the role of enabler.  But there is more to functional safety than…

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Aug 25

Safety Road Report

We interrupt this series on the General Assembly Meeting, to talk about the one-day training classes.  Seems I haven’t had a chance to talk about recent PROFINET classes in San Jose and Kansas City and I’m headed out to Cleveland now for another one. We continually tweak the classes based on attendee feedback.  Few people…

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Mar 8

Functional Safety over the Network Webinar

We’ve shortened the PROFIsafe section of the PROFINET and PROFIBUS one-day training classes this year.  So naturally we’re getting some requests to beef that up.  Instead, we’ve decided to do a webinar on the topic.  It’s scheduled for 2:00pm Eastern Time on April 1.  You will find a little more information and a link to…

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Nov 28

SPS Report 4: PROFIsafe

I do not understand the slow acceptance of functional safety over the bus in North America.  PROFIsafe has been around for more than 10 years.  It covers functional safety for discrete, process, and motion control applications in the same system.  It works on PROFIBUS and PROFINET.  It works via wire or wireless.  It accepts AS-I…

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Jun 11

Wireless Ethernet Safety

One of the other questions that came up in Grand Rapids came up during the PROFINET section and related to safety.  I thought it worth expanding on the answer to that.  The question: “Can I use PROFINET over wireless in a PROFIBUS PA environment?” First, let’s be clear that we are talking about two different…

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Apr 27

PROFIsafe in Hanover (Hanover Fair 2009 Report 2)

The PROFIsafe wall gets longer with every fair.  Befitting its longevity, I suppose. PROFIsafe began over 10 years ago.  Through last year there were 630,000 PROFIsafe nodes installed.  Based on the ARC report that the total number of bus-capable safety devices is 700,000, PROFIsafe has a 90% market share.  PROFIsafe is the only bus-based safety…

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