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Revolution Pi – Industrial PC Based on Raspberry Pi

revolution.kunbus.com

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Re: Revolution Pi – Industrial PC Based on Raspberry Pi

#61

Post by Munkum »

l1k wrote: post #57
Munkum wrote: post #51

Earlier quoted context omitted.

How does it benchmark against other modern PLCs? Could you give a ballpark figure for the scan time of a 10 robot cell for example?

I'm not sure if the question relates to motion control of robots, human-robot collaboration safety or something else entirely. If the question is about motion control of robots, our cycle time of 10-20 ms is probably too long as motion control usually requires If on the other hand the question is about human-robot collaboration safety, the product is likely unsuitable as this requires specially certified appliances.…

I work in the automotive sector. Not interested in human-robot collaboration at all, I was wondering whether this would be a suitable alternative to PLC control of spot welding and handling industrial robots. Even though the processing power of these things is likely to be better than that of a PLC, am I right in thinking that the overhead involved with running a proper (albeit fairly stripped down) OS would make it slower than a dedicated PLC? Obviously it has its place (and my curiosity is most definitely peaked) but controls hardware costs pale into insignificance compared to the capital costs of everything else in a car plant, so we'd need a pretty compelling case to switch.

Re: Revolution Pi – Industrial PC Based on Raspberry Pi

#62

Post by VdH1 »

Gracana wrote: post #47
l1k wrote: post #45

Earlier quoted context omitted.

Both the hardware (base board schematics) as well as the software are open source. Let's say Kunbus goes down the drain and you hit an issue. Best case someone in the community has already fixed it. Worst case you'll have to hire a decent consultant. Show me another PLC that affords the same kind of vendor independence. As to availability, the hardware is manufactured and assembled in Denkendorf, Germany, so the supp…

Well, I really like the idea of a standard open source industrial control system. If we ran into vendor/supply issues, that would give us options. But this industry (or at least the pocket of it that I work in) is very conservative. It's like the old "nobody got fired for buying IBM." Hmmm. I'd be curious to know who ends up using these devices. Maybe I could apply to work for them. :)

Hi there, I'm project manager of Revolution Pi and would like top inform you that you could see the RevPi branded as "industrial Pi" oat the PILZ booth at Hannover Fair. This is just one of our big customers. Many leading companies have already started to port their solutions on out RevPi, e.g. TeamViewer or GTI Control (HMI solutions). There is no doubt that this project has hit the nerve of those generation of engineers who have waited so long to get rid of propriety solutions of "big S"... That's why we called it "Revolution"...

Re: Revolution Pi – Industrial PC Based on Raspberry Pi

#63

Post by VdH1 »

analog31 wrote: post #41
l1k wrote: post #13

Hi there. I'm an engineer on the Revolution Pi team. AMA.

Nice idea! One of the reported issues with the Raspberry Pi is failure of the SD card if power is interrupted while the card is being written. Does your implementation overcome this problem?

We are in a very close contact to the Raspi Team and I can assure you that most of those "SD card issues" is pure rumor and urban legend. All known issues could be reduced to the fact that some people bought cheap cards and supposed them to work for ages even when treating them like you would never do with your PC. Raspi team's Sw developers told me they would switch off power without shutting the system down dozens of times per day and never ever had an SD card crash for years now. So please do not spread the rumor without any substantial first hand information. Just because someone did write something somewhere in the internet we can't judge about a technology. Having this said I would like to add the information that RevPi Core does not use any Sd card. nPlease refer to the Compute Module 1 information in the internet to get this Version of the Raspi explained.

Re: Revolution Pi – Industrial PC Based on Raspberry Pi

#64

Post by VdH1 »

Munkum wrote: post #61
l1k wrote: post #57

Earlier quoted context omitted.

I'm not sure if the question relates to motion control of robots, human-robot collaboration safety or something else entirely. If the question is about motion control of robots, our cycle time of 10-20 ms is probably too long as motion control usually requires If on the other hand the question is about human-robot collaboration safety, the product is likely unsuitable as this requires specially certified appliances.…

I work in the automotive sector. Not interested in human-robot collaboration at all, I was wondering whether this would be a suitable alternative to PLC control of spot welding and handling industrial robots. Even though the processing power of these things is likely to be better than that of a PLC, am I right in thinking that the overhead involved with running a proper (albeit fairly stripped down) OS would make it…

This is definitely not the right place to use the RevPi System. It is designed to be a a PLC as well as an IPC or Gateway system. This mixture makes it unique compared to standard PLCs. But any system needing cycle times in the 1 ms range or below can't be controlled by a RevPi. But try and find any PLC which is able to speak nearly every known fieldbus or can easily be used as a gateway for IoT projects.

Re: Revolution Pi – Industrial PC Based on Raspberry Pi

#65

Post by VdH1 »

chillingeffect wrote: post #55
l1k wrote: post #13

Hi there. I'm an engineer on the Revolution Pi team. AMA.

I'm always looking for LabVIEW alternatives... is one of your cards an analog input module? How else to get 10-20 analog inputs? And is 10kHz sampling reasonable? What's the highest practical Fs? Thank you/danke!

Our AIO module which will be available in June/July is a high precision module (0.1% FSC accuracy without calibration) having 4 differential inputs which can be used as current or voltage inputs (several input ranges are software controlled available). There are 2 additional RT100/RT1000 inputs and 2 analog outputs (current or voltage). These modules are not designed for high speed data acquisition but as standard inputs for typical industrial analog sensors or analog controlled actuators. We are using delta sigma converters to achieve the high precision but this excludes high speed acquisition.

Re: Revolution Pi – Industrial PC Based on Raspberry Pi

#66

Post by VdH1 »

fest wrote: post #23
l1k wrote: post #22

Earlier quoted context omitted.

The I/O modules themselves have 2 pin headers with 14 pins each. The pin headers receive adapters with wire terminals. The adapters are included. The German I/O module page has an animation which shows this in detail, it seems the English page is missing that for some reason: https://revolution.kunbus.de/io-modul/

That's great. Are there any modules with support for camera and/or screen (HDMI/DSI) planned?

We are already testing the next generation of RevPi which is called "RevPi compact". This series will have a connector with the DCI for the original Raspi camera. We will start selling them at SPS Drives Fair in November. But there is plenty of really good USB cameras on the market and they work fine with Compute Module 3 (CM3). We have had an exhibit at Hannover Fair where the only sensor was an USB Cam connected to the RevPi Core which controlled pumps and valves to mix oil and water from 2 tanks into a third tank and separate the fluid back in their tanks again using just the color difference of the fluids to detect the fluid levels.

Re: Revolution Pi – Industrial PC Based on Raspberry Pi

#67

Post by VdH3 »

ryanmarsh wrote: post #42

+55°C max operating temp Industrial? Nope.

Haha:-) that means you deny an S7-300 PLC to be industrial... Better study EN61131-2 and specs of any standard PLC before giving such comments...hopefully you've just mixed up "industrial" with "automotive" grade...

Re: Revolution Pi – Industrial PC Based on Raspberry Pi

#68

Post by VdH3 »

delinka wrote: post #60
l1k wrote: post #38

Earlier quoted context omitted.

The case is made of polycarbonate. Cardboard would be interesting from an environmental perspective, but likely wouldn't be able to withstand the harsh conditions prescribed by EN 61131-2 (low/high temperatures, damp air, vibrations/shock etc). We add a safety margin to those conditions, e.g. 61131-2 requires safe operation at 55 degrees Celsius, we test at 60 degrees. The products are used e.g. in automotive applica…

I think the intent is "give developers a cheaper system to get started with" and not putting a cardboard version into production environments.

No that is definitely not the intention of RevPi. The price is not comparable to Raspberry Pi. It's just the other way round: Many of our customers have used original Raspis to play around and have short development cycles. When they start getting the things ready for real life they switch to RevPi because it is nearly 1005 sw compatible with their experimental system but which is designed for rough environment like any other system from KUNBUS. Btw. the case is the same which used for several PILZ products developed and manufactured by KUNBUS.

Re: Revolution Pi – Industrial PC Based on Raspberry Pi

#69

Post by VdH3 »

epynonymous wrote: post #33

are my eyes mistaken, but a cardboard case? is that safe? fire hazard?

Don't know which pics you have looked at but if you scroll through the blog you will find many pictures which are photoshopped and several pictures which are real fotos showing the case opened etc. Hope this will leave no doubt that this thing is made of durable poly carbonate...

Re: Revolution Pi – Industrial PC Based on Raspberry Pi

#70

Post by fest »

VdH1 wrote: post #66
fest wrote: post #23

Earlier quoted context omitted.

That's great. Are there any modules with support for camera and/or screen (HDMI/DSI) planned?

We are already testing the next generation of RevPi which is called "RevPi compact". This series will have a connector with the DCI for the original Raspi camera. We will start selling them at SPS Drives Fair in November. But there is plenty of really good USB cameras on the market and they work fine with Compute Module 3 (CM3). We have had an exhibit at Hannover Fair where the only sensor was an USB Cam connected to…

Hannover fair this year? Damn, I skipped this one, would have been great to chat with you.

I am actually working on a prototype of something similar- Pi, camera, small touchscreen, distance sensor and small number of IOs.

The two specific use cases for me: measure dimensions of parts hard to measure with other sensors and stopping conveyor when some parts end up in unexpected places.

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