nehpets

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Posts posted by nehpets

  2. Posted

    I find that this issue occurs if the USB stick is removed without first using Windows to shutdown the stick and wait for it to tell you it is safe to remove it, if you just pull it out after use then when plugged back in any PC or laptop, Windows reports there is an error with the stick and requests you 'fix it', Just ignore the message and carry on, It's just Windows nanny operating system kicking in

    Steve

  3. Posted

    The K4 in the instruction represents 4 nybbles (group of 4 bits = nybble) therefore K4 signifys 16 bits

    The instruction is moving Hex 10 into M60 to M75, (K4M60), as the binary pattern of hex 10 is 0000000000010000 then M64 becomes true.

     

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  5. Posted · Edited by nehpets
    spelin

    It would appear that it depends which polarity the COM is connected to as to wether the inputs source or sink examine the diagrams closely with regards to the COM terminals.

  7. Posted · Edited by nehpets

    Hi all,
    Just been given a task of modifiying the program in a Pacdrive C400 controller, (a new one on me).
    According to Google, the original manufacturer was a German Company ELAU, who have subsequently been obtained by Schneider. It would appear the programming software was EPAS-4, but there is no reference to this on the Schneider website and I can't find any definative answer to the programming package I need to obtain to be able to view/modify the program.
    Any info would be appreciated.
    Steve

  12. Posted

    assuming you mean a timer intergrated circuit a simple well documented unit would be a 555 timer ic, for use with a minimal number of discrete components

  17. Posted · Edited by nehpets

    Check for something like K2M100, where the M100 in this example represents your latched bits, the example shown actions M100 through to M115, the K2 represents 2 nybbles (2 x 4bits)

    also check the used devices list.

    are the addresses being written to by a HMI or external equipment?

  19. Posted

    If your post is correct you are using the GOT Special Internal device (GS)

    these only have a range of 0 -2047 (depending on the display type), You should be using GD (range of 65535)

    Steve

  24. Posted

    SER instrustion is a search function, in your example D2504 is the start of the search array, D2601 is the value it is searching for, D2501 is the position within the array it found the match, D2600 is the number of elements in the searched array.

    The values in D2504 and D2601 are changing because somewhere in your program they are being indexed either directly or indirectly, you would need to find these to understand what is being achieved with this coding.

     

    Steve