Jump to content

Vision & Samba PLC + HMI Controllers & VisiLogic Software

Welcome to the Vision and Samba series forum
Talk about issues related to the Vision and Samba PLC + HMI series and to VisiLogic software

2,869 topics in this forum

    • 10 replies
    • 498 views
    • 10 replies
    • 2,099 views
    • 10 replies
    • 1,346 views
  1. Visilogic For V1040

    • 10 replies
    • 2,316 views
  2. Com RS232

    • 10 replies
    • 1,648 views
    • 10 replies
    • 1,603 views
  3. PT100 on V350

    • 10 replies
    • 5,410 views
  4. PWM input

    • 10 replies
    • 2,568 views
    • 10 replies
    • 4,839 views
    • 10 replies
    • 1,029 views
  5. V570 setup problems

    • 10 replies
    • 4,359 views
    • 10 replies
    • 170 views
    • 10 replies
    • 694 views
  6. V560 Keypad Entry

    • 10 replies
    • 1,492 views
    • 10 replies
    • 181 views
  7. Smartphone, Tablet,... ?

    • 10 replies
    • 3,033 views
  8. Problem PT1000 temp sensor

    • 10 replies
    • 2,383 views
    • 10 replies
    • 3,127 views
  9. PID suggestion

    • 10 replies
    • 2,827 views
    • 10 replies
    • 2,171 views
  10. Moving/Rolling Average

    • 10 replies
    • 2,861 views
    • 10 replies
    • 1,818 views
  11. expansion error

    • 10 replies
    • 1,105 views
    • 10 replies
    • 1,562 views
    • 10 replies
    • 1,398 views
  • Member Statistics

    4,979
    Total Members
    501
    Most Online
    Steve_OG
    Newest Member
    Steve_OG
    Joined
  • Topics

  • Who's Online (See full list)

    There are no registered users currently online

  • Posts

    • Just to throw in my "two bobs worth" a left field alternative is related to how  you are getting the total figure.  It sounds like you are deriving it from what you are sending  to a flow controller.   If you want to be really, really accurate, then you should actually read  what the controller sends back, if this is possible.  Most analogue valves can take a little time to adjust to what you send, so in theory if you do accumulation maths on what you measure using an analogue position value from the valve, it will be more accurate.  Analogue valve actuators generally have mechanically linked analogue outputs that show the actual state of the valve, and in some ways this will do the job more easily as you would treat it as a totally separate thing. And re my Aussie slang, .....one place that might help and will also give you a laugh at how we destroy language for a giggle http://www.wanowandthen.com/slang.html    Be prepared to lose quite a few (but very amusing) minutes reading it all.  cheers,  Aus        
    • Hi Lacey, in your case I would not be using modbus.  I would be strongly looking at UniCan, which will easily achieve everything you want and in a faster time. In case you missed it, have a look at the first post linked below and the file attached there.  It should get the braincells going on the advantages and ease of UniCan to achieve what you want to do.  The second post link is my thoughts on using Excel that make a very confusing part of this operation easy.  Repeating what I say there, it is essential that you don't lose track of things when using UniCan, otherwise it can become a big mess.  Also note that until you get ALL your UniCan directives/controls/elements into ALL your plcs, things might not work as expected.  I always have UniCan stuff as a sub, and during development I often put a manually controlled MB in front of the sub's call, so that I can load all the programs in and then roam quickly around turning things on.  It can make it easier to track a potential issue.   If you have it all set up correctly it works a treat. http://forum.unitronics.com/topic/6550-displaying-mi-from-one-plc-to-another/?tab=comments#comment-26561 http://forum.unitronics.com/topic/6527-with-vectors-why-didnt-i-think-of-this-ages-ago/?tab=comments#comment-26422 cheers, Aus
    • I am in the process of trying to get my 1210 to communice with a string of 120's and 130's via modbus 485 for a total of 10 PLC's in a master slave set up. Each of these plcs need to be read and written too. I am rather new to networking PLC's and mostly self taught. Your expertise of programming I believe would greatly help me in my struggle with this. Ausman and hotwires could you send me examples or vlp files of what you did to get your systems working properly? Thank you!
    • Hey all,    I'm trying to establish communication between an iFIX 5.8 SCADA system on a windows 10 PC and a V570 Enhanced Vision PLC.  I have UniOPC downloaded, configured with the PLC's proper comms info, and I have iFIX OPC Client setup to speak to the UniOPC Server.  The Discover and Auto Configure tool in Workspace for iFIX finds the server, but the client just will not connect to the server.   I keep getting errors in the Event Window in the iFIX Power Tool (Proficy iFIX OPC Client Version 7.46g) saying "Requested operation requires further elevation."  Yet I've been starting all programs as an administrator, and have set each to run as administrator as well. Does anyone have any experience connecting between iFIX and Unitronics PLCs?  Any help/suggestions are greatly appreciated.
    • Think about what an actual integral is. You take the curve and slice it up in small pieces and the area under the curve is the sum of the areas of the rectangles created as the widths approach zero. You can fairly accurately approximate this by determining the minimum time slice needed where you have little variation in the analog input (typically 100ms to 1 sec). I'll use 1 sec for this example. If you take your flow rate value (liters/hr) and divide by 3600, then you have the volume that flowed in 1 second. Sum that number every second to give a continuous volume. One thing to be cautious of is that your initial flow rate number be large enough so that you don't lose resolution by dividing by 3600. To prevent that, do your linearization to about 3 decimal places (i.e. if your flow sensor were 0-100 liters/hr, then linearize to 0-100,000 instead of 0-100 - this provides an implied 3 decimals of precision that you can use if need be or drop off your final value by dividing the final number by 1000).
  • Blog Entries

×
×
  • Create New...