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    Modbus; How to read Status bits

    Issue:
    Modbus; How to read Status bits


    Product line:
    All products


    Environment:
    All products


    Cause:
    How to read Status bits


    Resolution:
    Using a Modbus tool like Generic Modbus Tester you receive the values in the two examples below.  The Generic Modbus tester does not provide binary values so the examples below shows the conversion.  If the application used provides binary then keep that part.
     
    Below is a couple of examples from a Galaxy VX:
    Example 1:  Register 400002 (16385)
    16385 in BIN 100 000 0000 0001
    This example has 14 bits and to get to 16 bits two zeros were added to the left (red text)
    10 0000 0000 0001 is 0010 0000 0000 0001
    Below is the mapping of the bits to the Modbus registers to the Galaxy VX.  You start the with zero on the right and end with 15 on the left.


     
    Example 2:  Register 400010 (512)
    512 in BIN 10 0000 0000
    This example has 10 bits so six bits needs to be added to the left (red text)
    10 0000 0000 is 000 0010 0000 0000
    Below is the mapping of the bits to the Modbus registers to the Galaxy VX.  You start the with zero on the right and end with 15 on the left.




     

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