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How to copy Structure value to Dword

Created by: Jazz_M at: 10/18/2012 4:16 PM (8 Replies)

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10/18/2012 4:16 PM	Rate (0)
Jazz_M Posts: 1121 Rating: (86)	Hi All, i Have Structure of 32 bits (bool). in Stat of an FB, I have to transfer the value to Dword at out. I have used the Ar1 and Ar2 concept, But when i call the Fb11 in another Fb12, it over laps with main FB12. I have attached the Project. Any ideas, Attachment Test_4.zip (200 Downloads)
Jazz_M Posts: 1121 Rating: (86)
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10/18/2012 5:00 PM	Rate (0)
manmeet Gold Member Joined: 1/3/2006 Last visit: 1/13/2026 Posts: 726 Rating: (71)	Hi You shall not disturn AR2 in FB. You can try this LAR1 P##State // LAR2 P##State //comment L D [AR1,P#12.0] T D [AR1,P#0.0] With this you avoid changing the AR2 value.
	Last edited by: manmeet at: 10/18/2012 5:26 PM Sorry ! lots of typos ! Last edited by: manmeet at: 10/18/2012 5:06 PM Last edited by: manmeet at: 10/18/2012 5:05 PM What do you mean when you say "it overlaps with main FB12." ? I din''''''''''''''''t got that.
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10/18/2012 6:45 PM	Rate (0)
manmeet Gold Member Joined: 1/3/2006 Last visit: 1/13/2026 Posts: 726 Rating: (71)	Hello Tagolover ! If by overlaping you meant that IDB of FB12 shows the parameters of FB11, then it will be so because you have declared FB11 as STAT of FB12. If you don't want this then don't declare FB11 in STAT of FB12. Instead use CALL FB11 the you would do in FC or OB. If you did not meant by what I have assumed then please ignore !

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10/19/2012 1:31 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 1/22/2026 Posts: 3054 Rating: (1062)	Tagolover I have used the Ar1 and Ar2 concept, But when i call the Fb11 in another Fb12, it over laps with main FB12. Hello Tagolover AR2 contains the Multi Instance offset and it's value MUST be taken into account when doing indirect addressing in an FB's to its variables. You code does not take AR2 into account which causes your "overlapping" problem. There's a few ways to fix this and the links below have all the info on this: Adress Absolut with multi instance How do you parameterize blocks, which have "ANY"-type or "Pointer" type parameters? (see bottom of page) access to one multi-instance I hope this helps
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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This contribution was helpful to 1 thankful Users Jazz_M

10/22/2012 10:49 AM	Rate (0)
Jazz_M Posts: 1121 Rating: (86)	Hi Fritz and Manmeet, Thank you for your reply. Manmeet i wanted to copy the structure value to Dword for WinCC call. If you use AR2 concept then that particular FB can not be called inside a FB as Subblock. Dear Fritz I had looked through the Link that you gave me. I downloaded the files and went through the AR2 My query is that 1. Should i add the offeset to my multiinstance or what should i do. 2. How should i call my instance for the previous project (attached in first post). Now i am really confused. can you help me out. Regards, Tagolover.
Jazz_M Posts: 1121 Rating: (86)	Last edited by: Tagolover at: 10/22/2012 10:50 AM
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10/22/2012 1:37 PM	Rate (0)
manmeet Gold Member Joined: 1/3/2006 Last visit: 1/13/2026 Posts: 726 Rating: (71)	Hi Tagolover, You have not defined what exactly your problem is and what exactly you meant when you said one FB overlaping the other one. The program which you made shall work without problem that's because you are restoring AR2 after disturbing it. If in case you want to avoid changing AR2 then you can initialize AR1 to STAT and access both double word and structure, the way I have mentioned in 2nd post.

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10/23/2012 4:37 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 1/22/2026 Posts: 3054 Rating: (1062)	Hello Tagolover I'll try to make it clearer: Your FB12 has two BOOL input parameters. Your FB11 is called as a Multi Instance call from FB12. Result: FB11'svariables will be located after FB12's IN variables and in your case start asof address 2.0 in the Instance DB of FB12. As such you MUST take AR2's multi instance offset into account when doing indirect addressing inside FB11 and the attached picture will hopefully help with this explanation and also shows you how to fix it. Note too that I omitted using any indirect addressing for the output variable "#State", as it is already declared as a DoubleWord and might as well be used symbolically. I hope this helps Attachment FB Multi Instance call AR2 offset example.jpg (228 Downloads)
	Last edited by: fritz at: 10/23/2012 5:51 AM typos Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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This contribution was helpful to 1 thankful Users Jazz_M

10/24/2012 4:36 AM	Rate (0)
Jazz_M Posts: 1121 Rating: (86)	Hi Fritz Thank you Fritz and Manmeet. Manmeet The reason is that AR2 variable shall intervene with the data delcared in the FB12. When you program a block for a bigger application, the intervene shall be clearly visible. in, out, inout will have some default value written as the indirect addressing is used in the FB11. Fritz Thank you once again i shall revert back after going through the same.
Jazz_M Posts: 1121 Rating: (86)
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11/7/2012 1:26 PM	Rate (0)
Jazz_M Posts: 1121 Rating: (86)	Hi Well thank you for your support i think i got a hang on topic. Thank you once again.
Jazz_M Posts: 1121 Rating: (86)
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This contribution was helpful to 2 thankful Users S_Moderator fritz

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