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Converting 2 WORDS to REAL

Created by: neman at: 9/1/2020 6:41 PM (5 Replies)

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9/1/2020 6:41 PM	Rate (0)
neman Posts: 25 Rating: (0)	Hello, How do I convert 2 words to floating point value in step 7? I am reading a modbus holding register and getting 2 words.
neman Posts: 25 Rating: (0)
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9/1/2020 9:32 PM	Rate (0)
draacula Bronze Member Joined: 7/31/2017 Last visit: 11/18/2025 Posts: 99 Rating: (8)	neman Hello, How do I convert 2 words to floating point value in step 7? I am reading a modbus holding register and getting 2 words. Maybe this thread might help you: https://support.industry.siemens.com/tf/ww/en/posts/convert-word-to-dword/44101?page=0&pageSize=10
	thanks & regards, draacula
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This contribution was helpful to 1 thankful Users neman

9/2/2020 8:16 AM	Rate (0)
crazyCow Gold Member Joined: 12/4/2009 Last visit: 11/6/2025 Posts: 453 Rating: (137)	neman Hello, How do I convert 2 words to floating point value in step 7? I am reading a modbus holding register and getting 2 words. Hi! If those 2 words contain floating point number formatted as IEEE 754, then proceed as follows: L FirstModbusWord T MW20 L SecondModbusWord T MW22 ... L MD20 Resulting double word [MD20] will hold target floating point number. Maybe you will have to swap words. Regards.
	If this post actually helped, you may consider using the Rate button above.
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This contribution was helpful to 1 thankful Users neman

2/18/2024 5:43 PM	Rate (1)
oscarrozo Member Joined: 3/23/2016 Last visit: 7/9/2025 Posts: 5 Rating: (1)	I did this in LAD. Attachment LAD 2 Words to DoubleWord.png (1260 Downloads)

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12/2/2024 11:57 AM	Rate (0)
bASHer1991 Joined: 4/24/2024 Last visit: 4/13/2025 Posts: 14 Rating: (0)	Hi. Did this work?

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2/20/2025 11:52 AM	Rate (0)
AutoGen_1351463 Joined: 2/22/2024 Last visit: 4/9/2025 Posts: 1 Rating: (0)	Hi, Thanks it worked!

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