Archive for June 2009
What are the differences between PROFIBUS V0, V1, and V2?
The question was prompted at the Vancouver PROFINET one-day training class. (Yes, we get PROFIBUS questions at the PROFINET class and vice versa.) Here’s the summary: DPV0: Cyclic Data Exchange, Diagnostics (all devices) DPV1: Acyclic Data Exchange, Process Alarm Handling (process automation) DPV2: Clock Synchronization & Time Stamp (drives) It’s important to note that the…
Read MoreThe Smell of the Rosin; The Roar of the Amplifier
A Fathers Day tribute at the intersection of personal and professional. I read a HubSpot blog post called “How Do You Balance Personal and Professional on Social Media?” I keep my personal and professional lives separated online by using Facebook for personal and LinkedIn and Twitter for professional as I’ve posted before. But today’s post…
Read MoreIs PROFINET routable? (Report from Vancouver)
The question came up at the PROFINET one-day training class in Vancouver: “Is PROFINET routable?” In other words, can PROFINET messages be sent through a router? First, a little background. In an Ethernet network, several types of device can be used: hubs, switches, and routers. Each works at a different layer of the ISO/OSI reference…
Read More23-minute Intro to PROFINET
I was one of four presenters at GlobalSpec’s virtual conference and exhibit. If you need a really brief introduction to PROFINET, the presentation is archived in the “Conference Center” there. I wasn’t able to answer all the questions, but look for a document with all the questions answered on the site as well.
Read MorePROFINET Certified Network Engineer Training
How do you gauge the growth of your favorite technology without an expensive market company study? (PROFINET being the technology; it’s my favorite.) One way is the number of people coming to the free one-day training classes. (An ever-increasing number.) A second is those taking the next step and clamoring for the next class –…
Read MoreWireless 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…
Read MoreHow many devices on a PROFIBUS DP network in Grand Rapids?
There was a good crowd at the Grand Rapids PROFIBUS one-day training class last week. Manny and Torsten were there while I was in Vancouver with Hunter for a PROFINET one-day training class. One of the questions that came up in Grand Rapids concerned how many PROFIBUS DP devices are allowed on a network. We have…
Read MoreJourney to Mars (in fiction)
This month’s IEEE Spectrum magazine features articles about Mars exploration. A related article “My 10 Favorite Mars Novels” by Kim Stanley Robinson reviews a century’s worth of Mars science fiction. In the introduction, he mentions A Princess of Mars by Edgar Rice Burroughs and War of the Worlds by H.G. Wells. [Click on those titles…
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