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Converting REAL to Byte. And "flipping"

7/5/2024 12:13 PM	Rate (0)
AutoGen_7200386 Posts: 2 Rating: (0)	Hello everyone, guys! I work in the TIA Portal program. I need to write the code. I get the values in a variable of type REAL in byte order: 1234, I need to make sure that a value in a different order 3412 is written from this variable to another variable. In short, it comes (real) purely in the order (1234), and it must also be output in real, but in a different order (3412). Don't judge strictly, I'm just learning.
AutoGen_7200386 Posts: 2 Rating: (0)
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7/5/2024 12:18 PM	Rate (0)
Towome Platinum Expert Joined: 7/9/2015 Last visit: 1/19/2026 Posts: 4500 Rating: (644)	Hi, I don´t know your PLC but there exists an instruction called SWAP but it sorts Bytes from 1234 to 4321. But for you application I don´t know any instruction so you have to copy the bytes manually. Regards, Towome
	If my post was useful, please rate me - if not, please tell me - thank you!
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7/5/2024 12:22 PM	Rate (0)
AutoGen_7200386 Posts: 2 Rating: (0)	Can you tell me how you can do this manually? What functions will you have to use? Thank you.
AutoGen_7200386 Posts: 2 Rating: (0)
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7/5/2024 1:29 PM	Rate (0)
jacek d Platinum Expert Joined: 9/23/2005 Last visit: 1/20/2026 Posts: 5155 Rating: (772)	How can you access unstructured data types bit-by-bit, byte-by-byte or word-by-word and symbolically in STEP 7 (TIA Portal)?
	Regards, Jacek What is confusing you is the fact that you never see a number but always its digit representation. So you end up thinking that the number is the representation. - Andrej Bauer Any claims against me - based on whatever legal reason - resulting from the use of any code and/or ideas presented on this forum shall be excluded. #StayWithUkraine
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7/5/2024 1:34 PM	Rate (0)
Towome Platinum Expert Joined: 7/9/2015 Last visit: 1/19/2026 Posts: 4500 Rating: (644)	Hi, you can copy your Real to a memory double word an the with load and transfer instructions you can copy the byte to another MD. Or use the AT-construct for it or Slice instruction - it dpends on the PLC you use. Regards, Towme
	If my post was useful, please rate me - if not, please tell me - thank you!
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