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Swapping Integers of one whole Data Block with SCL

4/15/2025 6:41 AM	Rate (0)
warhound96 Joined: 12/6/2024 Last visit: 8/29/2025 Posts: 22 Rating: (0)	Hello once more, I have a question. I have 2 data blocks and each of them has a ton of Integers. One especially has around 60 and the other around 18 Integers. I was wondering if there is a possibillity of using a "FOR" loop to SWAP all the Integers of the of the data block at once instead of doing it in ladder and for each of the Integers individually. My system is using a CPU s7-1500 in TIA Portal V18 Update 5. And i want to do this Swapping of my data that goes to a Fanuc R30i controller. Is it something like this possible? Best regards!

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4/15/2025 7:09 AM	Rate (0)
jacek d Platinum Expert Joined: 9/23/2005 Last visit: 9/11/2025 Posts: 5115 Rating: (768)	Are these integers forming an array? Has the data block an optimized access property? Show the data block declaration.
	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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4/15/2025 7:25 AM	Rate (0)
warhound96 Joined: 12/6/2024 Last visit: 8/29/2025 Posts: 22 Rating: (0)	Hello jacek, Yes, my data block is unoptimized and it's not in an array form as you'll see in my screenshot below. Attachment image_2025-04-15_102412342.png (181 Downloads)

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4/15/2025 8:30 AM	Rate (1)
jacek d Platinum Expert Joined: 9/23/2005 Last visit: 9/11/2025 Posts: 5115 Rating: (768)	Inside of a FOR loop use PEEK to read from the DB and write to some auxiliary variable, then SWAP_WORD it and write the auxiliary variable back with POKE. Actually this can be also done directly in LAD/FBD. It will look ugly but still doing the job. In SCL it can be also done like this: `FOR #index := 0 TO 60 BY 2 DO POKE(area := 16#84, dbNumber := #actual_number, byteOffset := #index, value := SWAP_WORD(PEEK(area := 16#84, dbNumber := #actual_number, byteOffset := #index))); END_FOR;`
	Last edited by: jacek d at: 04/15/2025 08:40:16 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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This contribution was helpful to 2 thankful Users warhound96 0_Einstein

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