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Joe Tauser

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Joe Tauser last won the day on September 10

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About Joe Tauser

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  1. The PLC starts scanning at the top of the program on power cycle. Which implies that all the outputs should be off initially based on your logic. However, one of my T-shirt sayings is "Empirical Data is the Best Data", and I believe your observation. It sounds like the output memory area is not getting cleared on a power cycle. I would send an email to with the contents of your post to support@unitronics.com. Please let us know what they get back to you with. We're mostly volunteers here. Joe T.
  2. I'm running 6.6.43 on win 10 and printed to PDF using the Microsoft Print to PDF printer as a test. It worked OK. Joe T.
  3. You got the Protocol Send right. You can create a string data type in a data table that will make your life much easier. Just right-click on the column header and define the string length. It looks like you've already figured out that you can rename the column. Double-click on the cell to edit it - remember to save. Retrieve the data with a Data Table Read Row into an integer array Then load the array into your Send block and trigger it. If you want to post your program I can poke at it for you. I'm always happy to help those who have put some effort in. Joe T.
  4. The servo is a soon to be released product. Sunit must have gotten his paws on one of the beta units for this project. That information wasn't supposed to be publicly released yet, as Unitronics doesn't want people hammering them with "When can I have it? When can I have it?" A salesman will sell a new product regardless of whether he can actually get it. Joe T.
  5. As a final comment, what I put out is just that - math. Your final results may vary. Don't order 100 pieces - start with something like 5. <rant> Define "quite expensive". Is this data kind of important or very important? I think management is freaking out over the overall cost of the project and struggling to get the cost down and pointing to a large dollar line item without quite understanding what's involved to roll your own sensor. When I was a young man I tried rolling my own 4-wire ohmmeter that was an integral part of a wire plating process. The short version is we tried to make my circuit work for a month in production only to determine that what I had come up with was not accurate enough nor could overcome the inherent noise in the process. We had to buy a $5K meter that worked in the process right out of the box. So often I see a company hire a young engineer and put him in charge of something that is really out of his league. "Oh, he's and engineer! He can figure it out!" But what's missing is the crusty old engineer to give him guidance. So he comes up with a process controller / monitor that is based on an Arduino or a Raspberry Pi. And he thinks he's a genius, just ask him. And then he goes and gets another job and nobody has a clue how it works. Consider the value of your time and how much damage you will cause if this doesn't work or is flakey. Also consider who gets to maintain this thing. If you built it, you are married to it. If you do go forward with this be sure to document the shit out of it, including ordering spare parts and writing a calibration procedure. That's what professionals do. </rant> Joe T.
  6. I love browsing aliexpress. So many bargains! Delivery time? I forgot to look at that! I do think that adding Modbus to this mix would overly complicate the code. But it is an option. @cleman84 - I'm a Dwyer dealer and I use and recommend those CCTs all the time. When the first came out I put them on my old-tyme Fluke 760A meter calibrator in AC current source mode and found them to be amazingly accurate for the price. But as you found out - AC only. As far as making your Honeywell sensors work, I see the CSLA2DG 150A sensor you've chosen has a 16.2 mV / amp output assuming one pass of the wire through the core. Cranking the math gives you a 2.43V change for 150A It also has an offset of Vcc/2, so when you apply 12 VDC power it will have an idle output of 6 VDC. There's a reason the DC transducers cost a bit more - you really need to amplify the output signal and remove the offset to come up with a standard process value. Or not. I've never tried the Raw Value configuration and the E3XB datasheet says something about frequency when you select this. I'd use the 0-10V range in 14 bit mode. This gives you 1 count per 1.63 mV, so you'll get about 10 counts per amp. Also take into consideration that the A/D will "chitter" a couple of counts all the time. Plus +/- 0.4% full scale error, which works out to an uncertainty of 66 counts, or 0.6 amps on a 150A full scale device. Just make sure your eyes are open before you jump into this project. Joe T.
  7. The STRUCT block was specifically designed for packing various data types into a chunk of MIs for UniCAN. Look at the Help on it. Joe T.
  8. I'm guessing your baseline is DC transducers in the $150 each range. Those are raw sensors and you're going to have to build a circuit board for them. And come up with a dedicated 12 VDC power supply. And test each one's output with a known meter at several points to calibrate them and set up your program. But yes, they should work. Give yourself a couple of days to do it. Joe T.
  9. Without the quadrature signal or something else to tell the PLC what's going on there's no way to do this. Are there any outputs on the PLC that control which way it's going? Joe T.
  10. Don't forget you're going to need CANbus cards for the V130s - part number V100-17-CAN. Here's the cable we use- https://www.belden.com/products/industrial/cable/bus-cable/devicenet You're technically supposed to use "thick" cable for main runs but it's expensive ($4.13 / ft in the US). Depending on the distance I usually use "thin" ($2.08 / ft) and it works great. How far are you going? Joe T.
  11. +1. But we can help get started. You need a quadrature signal to determine which way you're going. If you don't know what this is- http://www.ni.com/product-documentation/4763/en/ You mentioned you have a swivel with 24 points. You'll need two signals to feed into the V350's inputs to get what you want. I've been known to use two photoeyes or two prox sensors mounted offset on the same wheel to generate my own signal. Do you have a mechanical drawing of your swivel and how the sensor will be mounted? By the way, use an ML to track your counts initially. There's no such thing as a fractional pulse so a float won't do you any good. If you've started on a program and have questions then post it here. There are also example programs under Help->Examples. Joe T.
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