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indirect addres DB values from multi istances FB

Created by: Marco_Gabrielli at: 9/24/2014 8:22 AM (4 Replies)

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9/24/2014 8:22 AM	Rate (0)
Marco_Gabrielli Posts: 53 Rating: (1)	Dear Expert I have problem with indirect addres DB values from multi istances FB // pointer table -> ACCU1 -> AR1 L P##Idx // Idx input parameter -> ACCU1 LAR1 // -> AR1 // # DB tab L W [AR1,P#0.0] // < -- Some times become 00 !! T #Tab_DB // tabele Address L #Tab_Nro // Input parameter : N. of SUB TABLE L 1 -I L OFFSET // shift table *D SLD 3 // shift ACCU1 3 a Sx -> salta parte a bit di AR1 L D [AR1,P#2.0] +D T #Tab_AR1 I have this code in MULTI FB inside one mother FB. Some times one of this multiistances crash. If use standard , DB istance for each DB works. Look like Multi istance dirty up my pointer. Any help?
Marco_Gabrielli Posts: 53 Rating: (1)	Last edited by: Min_Moderator at: 9/24/2014 11:45 AM New subject after splitting from /tf/WW/en/Posts/99422#top
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9/24/2014 8:50 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 12/19/2025 Posts: 3052 Rating: (1062)	Hello Marco_G Marco_G Look like Multi istance dirty up my pointer well, sort of, but it's more a case of you not taking AR2 into account which contains the Multi Instance offset when an FB is called. Have a look access to one multi-instance on how to do this and note that the command "UD DW#16#00FF_FFFF" is German menmonic and would be "AD DW#16#00FF_FFFF" in english mnemonic. 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 2 thankful Users IBN-Service Jens_app

9/24/2014 9:26 AM	Rate (0)
IBN-Service Posts: 8946 Rating: (1000)	fritz Hello Marco_G Marco_G Look like Multi istance dirty up my pointer well, sort of, but it's more a case of you not taking AR2 into account which contains the Multi Instance offset when an FB is called. ... That is exactly the point! Never forget AR2 if using a FB. Also if it is not called inside multiinstance, because you never know if it will be used as multiinstance one day...
IBN-Service Posts: 8946 Rating: (1000)
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This contribution was helpful to 1 thankful Users fritz

9/25/2014 9:32 AM	Rate (0)
Marco_Gabrielli Posts: 53 Rating: (1)	works ! In my example have always to care AR2 like: TAR2 // Load address register into accumulator AC 1 (offset) UD DW#16#FFFFFF // Turn off area ID // pointer tabella -> ACCU1 -> AR1 L P##Idx // -> ACCU1 +D LAR1 THKS
Marco_Gabrielli Posts: 53 Rating: (1)
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This contribution was helpful to 3 thankful Users fritz IBN-Service Min_Moderator

9/25/2014 9:35 AM	Rate (0)
IBN-Service Posts: 8946 Rating: (1000)	Marco_G works ! In my example have always to care AR2 like: TAR2 // Load address register into accumulator AC 1 (offset) UD DW#16#FFFFFF // Turn off area ID // pointer tabella -> ACCU1 -> AR1 L P##Idx // -> ACCU1 +D LAR1 THKS Thank you for Feedback.
IBN-Service Posts: 8946 Rating: (1000)
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