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1/27/2012 6:26 PM	Rate (0)
VWBobC Posts: 1 Rating: (0)	I am very new to S7 and need to compare 2 data blocks each with 16 bytes in them and i will start at byte 2 and look at 13 bytes if the are equal i will set a bit. I am in no sense a code writer been an AB person for 20+ years so this is a new concept and their aren't just blocks i can use. any help would be greatly appreciated.
VWBobC Posts: 1 Rating: (0)
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1/27/2012 7:23 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 8/31/2025 Posts: 6874 Rating: (1368)	VWBobC I am very new to S7 and need to compare 2 data blocks each with 16 bytes in them and i will start at byte 2 and look at 13 bytes if the are equal i will set a bit. I am in no sense a code writer been an AB person for 20+ years so this is a new concept and their aren't just blocks i can use. any help would be greatly appreciated. Dear VWBobC, Please read the posts in the following thread.Check the examples provided there.Ask here in case of any difficulty How to Compare two data Blocks Best regards, Hamid Hosseini
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1/27/2012 11:37 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 8/31/2025 Posts: 6874 Rating: (1368)	Dear VWBobC, I hope the following be solution to your problem and meet all requirements.As I have tested the result is "Satisfactory". As a long time user of Allen-Bradley CPUs, this is a little tough to personally handle all data processing in controller's level language (STL Codes).I hope by reading posts in THIS thread and tracking discussions there (especially fritz's concise final solution) you understand how we reached this solution. [code] LAR1 P#3.0 OPN DB 1 OPN DI 2 L 13 lp: T #lpcount L DBB [AR1,P#0.0] L DIB [AR1,P#0.0] <>I JC out +AR1 P#1.0 L #lpcount LOOP lp S M 0.0 JU end out: R M 0.0 end: NOP 0[/code] Best regards, Hamid Hosseini
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This contribution was helpful to 1 thankful Users fritz

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