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real number to Timestamp

Engineering 🇬🇧
Inna
2021-10-27
2021-10-28

  • Inna - 2021-10-27

    Hi,
    I have two real numbers that represent timestamp - see the attached screenshot. Is there codesys function or structure that converts 2 real numbers into appropriate timestamp in a resolution of mSec. If codesys has no build-in support for this, what is the better way to perform it in ST?

    Thanks

     
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    Timestamp_from_2real_numbers.JPG

  • tvm - 2021-10-28

    What about this?

    TYPE TIMESTAMP_UNION :
UNION
    As2RealS:       TIMESTAMPASREAL;
    AsTimeStamp:    TIMESTAMP;
    AsHex:          TIMESTAMPASHEX;
END_UNION
END_TYPE

TYPE TIMESTAMPASREAL :
STRUCT
    Real1:      REAL;
    Real2:      REAL;
END_STRUCT
END_TYPE

TYPE TIMESTAMPASHEX :
STRUCT
    {attribute 'displaymode':='hex'}Byte1:      BYTE;
    {attribute 'displaymode':='hex'}Byte2:      BYTE;
    {attribute 'displaymode':='hex'}Byte3:      BYTE;
    {attribute 'displaymode':='hex'}Byte4:      BYTE;
    {attribute 'displaymode':='hex'}Byte5:      BYTE;
    {attribute 'displaymode':='hex'}Byte6:      BYTE;
    {attribute 'displaymode':='hex'}Byte7:      BYTE;
    {attribute 'displaymode':='hex'}Byte8:      BYTE;
END_STRUCT
END_TYPE

TYPE TIMESTAMP :
STRUCT
    Hour:       USINT;  
    Year:       USINT;
    Month:      USINT;  
    Day:        USINT;
    mSec:       UINT;   
    Second:     USINT;  
    Minute:     USINT;
END_STRUCT
END_TYPE

PROGRAM Test_PRG
VAR
    TestTimestamp:      TIMESTAMP_UNION:= (As2Reals:= ( 
        Real1:= 4.14855132E-28,
        Real2:= 1.0501924E-25
    ));
END_VAR

    I had to play around with the byte order in the TIMESTAMP structure, depending on your platform, it might be different, I don't know. And the TIMESTAMPASHEX struct was just for information, you wouldn't really need it.

     
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    Capture.PNG

  • Inna - 2021-10-28

    Thanks.
    I'll try it.

     

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