Nyame Ephraim

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Posts posted by Nyame Ephraim

  1. Posted

    Thank you very much panic mode for the write up.

    my goal is I wish to control flow. For example if I need 100 liters i should input the requirement in my HMI and once 100 liters is dispense The pump should stop, Different amount of litters maybe requested depending on the need. 

    Now my flow meter has been set at 1 liters per pulse, pulse width is 100ms and scan cycle is 3-5ms

    that is the scope of the project

    thanks

  6. Posted · Edited by Nyame Ephraim

    Hello all thanks for the Verious contributions. 

    After going through the program detaily I realize that the flow meter actually counts the same with my PLC HSC. But now my HSC does not count the same with my count up  CTU.

    For example the HSC is counting on 5 and CTU on 3

    Please is there any possibilities for the both to count the same ?

  9. Posted

    Hi experts, the pulses counted in my flow meter are not the same with what is counted in my PLC.

    my flow meter is set at 1 liter per pulse, and the pulse width is 100 mili-seconds 

    my PLC filter is set at 5 micro-seconds.

    example for 12-13 seconds in my flow meter readings 23 liters will be dispense

    for the same 12-13 second it shows 12 liters dispensed on my HMI.

    please what settings are required to make both the PLC and flow meter count the same ?

    am using high speed counter for this application.

    Please i will appreciate any contribution to enable me solve this problem 

    thanks 

     

     

  13. Posted

    Hi b_carlton thanks for the contribution you have made, when i configured HSC:0.ACC, it was working very well and counting in the destination register L9:0, but when i configured the other HSC, for example, when i connected my square wave simulator input in IN 4 which reads HSC:1, I noticed only the HSC was accumulating, but the destination register was not counting. 

    i connected the pulse input back to IN0, that is HSC:0 Only the accumulator was reading and the register L9:0 was not reading any longer. 

    just  thought of something, could it be that the battery am using to power my square wave generator is low ? and as such the pulses it generate now are weaker to work with the PLC scantime ?

     

     

  17. Posted

    Hello,  please i wish to simulate HSC in Allen Bradley 1400 using a square wave generator. i have built and tested the square wave generator it works well, the issue is how to wire it to Allen Bradley 1400.

    also i wish to understand IO Configuration filter settings, am using Allen Bradley 1400 B series Processor 

    Thanks 

    Square wave generator simulating with AB 1400 for HSC.pdf

  18. Posted

    Hello Sir, thanks for the reply. all the 4 inputs have been located and labeled as required. they are additional 4 inputs also used for flow rate. but i did not locate them on the data input file. 

    am doing direct verification's from the inputs and outputs once am done i will come out with documents identifying what input goes to were, and same with the output. 

    (nope... just need someone who has done PLC programming,. one person is plenty. you should be the one watching over the shoulder.) ( i studied electrical and control engineering, i did PLC programming as well, but am a fresher, coming across tasks like this builds me with a good experience) (remember the story of Thomas Edison and 2000 filament) once more sir thank for you constant contribution i appreciate.    

  19. Posted

    Hello Sir thanks for the contribution. i need to understand the ladder logic diagrams first. looking at ladder 5 you will see real world outputs as indicated in the electrical diagrams. now looking at the inputs of the ladder diagrams they are made up of registers , in this situation how do i figure out the real time input. coz if you check the input data file, it show some inputs are ON but i cant figure their locations on the diagrams.