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  1. kebo2K

    PID Power supply control with dynamic load

    My problem is not supplying the control signals when they need to be, the problem is making it so there is a smooth transition between voltage and current control when the transition is required. If I could guarantee a 50% control signal would create 50% output signal there would be no issue and...
  2. kebo2K

    PID Power supply control with dynamic load

    As I said in the first post....."This is a theoretical situation..." The project is to retrofit into large supplies that control metal finishing. Currently the supply inputs are manual knobs, but I need plc control in place of the knobs. And no.. it's not just a matter of set it and forget it...
  3. kebo2K

    PID Power supply control with dynamic load

    Thanks.... Both of your assumptions are correct.... the power supply regulates it output based on the SP I provide and I do monitor both output of the supply... Sounds simple enough and is very close to what I have tried. My problem occurs when I switch 'modes'. At the time, I don't know the...
  4. kebo2K

    PID Power supply control with dynamic load

    Hi All, Here is my situation... I have a 10V, 10A supply with independent voltage and current control inputs. During a process I have a load attached to the output that will increase in size as time goes. So at the beginning of the process I might set the power supply to 5V,5A and have a .5...
  5. kebo2K

    For next loop on Compactlogix

    thanks for all of the feedback... Modern OOP (object oriented programming) techniques allow you to write re-usable code and since debugging time for any given code set is directly proportional to the number of lines of code, it doesn't make sense to not write re-usable code. Having said that...
  6. kebo2K

    For next loop on Compactlogix

    Thanks for the replies.... I thought it would be simple to create an alias, which I can do for any tag other than UDT's and arrays. For each of those, I can create an alias for the base tag definition, but not for the individual element of the array or UDT. For the individual elements, the...
  7. kebo2K

    For next loop on Compactlogix

    Hi, I am a programmer that has been given that task of writing code for a Compact Logix controller. I have worked with opto22 and CTC PAC systems before, but never with AB stuff, and am having difficulty with a few (hopefully basic) concepts. My project involves monitoring and controlling...

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