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Joe Tauser

MVP 2023
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Everything posted by Joe Tauser

  1. Yes - you need a driver board that has a Step input. Joe T.
  2. I actually ran into this on a test fixture designed for vacuum cleaners. Moisture content of the air was part of the power calculation. Here is a paper on the equations needed to do what you want: http://maxwellsci.com/print/rjaset/v6-2984-2987.pdf Look through the equations and you see exponents are involved in getting the saturation vapor pressure. This math is beyond what a Jazz is designed to do. Floating points are needed. Unless you're really a glutton for punishment. Google "Taylor Series Expansion of Exponential Functions", which can probably be done in a Jazz. Many, many moons ago I did this in a Siemens PLC to calculate cosine. However, if you ask me to provide an example of how to do a Taylor Series in a Jazz I will reach through the Internet and choke you. Joe T.
  3. Bump. Creators - Vector->Struct doesn't list MF as a data source. Is this coming back? Joe T.
  4. Use two compare blocks in series or a within range block to only activate the linearization block when it is in your range. If below the range, store 0 to the analog output. If above the range, store 4095 to it. Joe T.
  5. Are you trying control humidity using a wet bulb / dry bulb configuration? If so, I'd advise against it. A humidity sensor is much easier. Joe T.
  6. Have you drawn a schematic of what you've done so far? Which I/O module do you have for your V1210? Joe T.
  7. Try reloading the OS and then load a blank program to get the PLC back to a known state. Joe T.
  8. First, what does 0-10V represent on your sensor? 0-50 degrees? That should be part of the sensor spec, not something you arbitrarily assign. Two degrees is not much of a span for a 0-100% output, but it's your system and you can do what you want. Once you have an accurate representation of your temperature you're going to have to use some compare blocks to manually manipulate a linearization block to create your 0-100 value. Take a whack at it and post your code. Joe T.
  9. I'm using Visilogic 9.8.31. I'm running into the same problem, but Vector->Struct no longer allows an MF data type as a source address. Did this disappear? Joe T.
  10. Have you tried re-triggering the Modbus Config block after you write a new value to the Slave ID MI? You didn't show your ladder code, but I'm betting the only time the Config block gets called is on power up. You can parallel another trigger to it, and it is required to set the slave paths. Joe T.
  11. Unfortunately, you're out of luck. Captain Hindsight says to copy your work to a flash drive at the end of the day. Joe T.
  12. Yes, you can select both colors separately for each item in the list. The out of range color is what shows if a number is loaded into the linked MI that does not have a corresponding list item. Joe T.
  13. Open the Help Menu on the U90 software and look at Sample U90 Projects->Examples ->PID. There are several programs you can look at. Joe T.
  14. Do you have documentation on their Modbus TCP? Usually port 502 is used for this. Joe T.
  15. Data tables are not really a database, but you can search for a value in a column. Look in the Help on "Data Table Find" Joe T.
  16. The cable that you need is part number MJ10-22-CS25. The V230 should have come with it. If you want to make your own the pinout is detailed in the Help. Joe T.
  17. Are you looking to do PID or on/off control? Joe T.
  18. The Vision series does not support EtherNet/IP. You'll have to upgrade to a UniStream to do this. You can use the Turck unit with the existing system by setting it up as an Modbus IP slave and mapping bits to it in your program. Joe T.
  19. If Flex's suggestion doesn't solve your problem then post your program. Joe T.
  20. Take the Socket Init blocks out of both programs. I don't think you need them. Joe T.
  21. The value shown on the ladder diagram will not be updated but the new preset will be there. To test this, go online and click on the timer. The new preset should be listed in the dialog box. Note that if you download the ladder again, Visilogic will notice this and ask if you want to upload the PLC value. If you don't click the PLC check box it will download the value you have on your saved program. Joe T.
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