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SCL indirect addressing

Created by: MysticEyes at: 1/5/2012 5:03 PM (11 Replies)

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1/5/2012 5:03 PM	Rate (0)
MysticEyes Advanced Member Joined: 2/2/2010 Last visit: 8/28/2025 Posts: 5 Rating: (1)	I have a problem with indirect addressing in SCL. If I use the example in the following link, I get an error. http://support.automation.siemens.com/WW/view/en/26495197 DataWord:= WORD_TO_INT(WORD_TO_BLOCK_DB(DB_Number).DW[Access4])+1; At the .DW* part, V11 says "Invalid ARRAY tag". The weird thing is that it works, if I make it in V5.5 and migrate it to V11. Did something change in V11 or am I doing something wrong?

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1/5/2012 5:28 PM	Rate (0)
0_Einstein Diamond Member Joined: 7/7/2010 Last visit: 9/16/2025 Posts: 16106 Rating: (2515)	In V11, there is an array index check at compile option. Maybe your box is checked meaning to have more strict syntax checking? It's one of the settings, options->settings->PLC programming->SCL->Compile->Check array limits. Just a thought.
	science guy
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1/5/2012 11:01 PM	Rate (0)
MysticEyes Advanced Member Joined: 2/2/2010 Last visit: 8/28/2025 Posts: 5 Rating: (1)	The "check ARRAY limits" is unchecked in de default compiler settings and in the block properties. IEC check is also unchecked.

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1/5/2012 11:11 PM	Rate (0)
0_Einstein Diamond Member Joined: 7/7/2010 Last visit: 9/16/2025 Posts: 16106 Rating: (2515)	If Access*4 is replaced with a value that is within the array range, does it compile and load and run? You might want to make a copy of the array to a simple array, indirectly index into it, make the change, the copy the array back. According to the SCL docs, you can copy an entire array with a single assignment (:=) command. I do not know if this is what the programmers want, but it does seem a strange coincidence that you're indirectly addressing twice in the same tag and that wasn't mentioned in the docs I read.
	science guy
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1/6/2012 10:56 AM	Rate (0)
Denilson Pegaia Platinum Member Joined: 9/23/2005 Last visit: 9/10/2025 Posts: 4416 Rating: (1485)	Hi, there is some changes from SCL 5.x to TIA V11, however, first of all: Whitch PLC you program? How is your TIA version?
	Denilson Pegaia Siemens Industry Sector Technical Support
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1/6/2012 3:36 PM	Rate (0)
MysticEyes Advanced Member Joined: 2/2/2010 Last visit: 8/28/2025 Posts: 5 Rating: (1)	I'm programming the IM 151-8 F CPU (6ES7151-8FB01-0AB0). The software I am using is TIA Portal V11 SP2 with Step7 professional V11 SP2.

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1/9/2012 3:44 PM	Rate (1)
Denilson Pegaia Platinum Member Joined: 9/23/2005 Last visit: 9/10/2025 Posts: 4416 Rating: (1485)	Hi, I tried with succcess the follow example: "MyDW":=WORD_TO_BLOCK_DB("mydbnr").DW("myworknr"); where: MyDW = word mydbnr = word myworknr = Dint. can this example to work on your program too?
	Denilson Pegaia Siemens Industry Sector Technical Support
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This contribution was helpful to 1 thankful Users MysticEyes

1/10/2012 1:39 PM	Rate (2)
tj-eci Regular Member Joined: 8/26/2008 Last visit: 9/14/2023 Posts: 1 Rating: (2)	>>DataWord:= WORD_TO_INT(WORD_TO_BLOCK_DB(DB_Number).DW[Access*4])+1; >>At the.DWpart, V11 says "Invalid ARRAY tag". I had the same problem migrating code from Classic to Portal. Just change the square brackets [] to parens (). Why they had to change this syntax I do not know.
	Last edited by: tj-eci at: 1/10/2012 2:40 PM
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This contribution was helpful to 3 thankful Users MysticEyes 0_Einstein wooker76

1/10/2012 4:40 PM	Rate (0)
MysticEyes Advanced Member Joined: 2/2/2010 Last visit: 8/28/2025 Posts: 5 Rating: (1)	It's indeed the square brackets [] that changed. It is working now. Thanx for the support.

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This contribution was helpful to 2 thankful Users O_Moderator 0_Einstein

2/1/2012 6:04 PM	Rate (0)
Denilson Pegaia Platinum Member Joined: 9/23/2005 Last visit: 9/10/2025 Posts: 4416 Rating: (1485)	Hi, here there is a printscreen of the indirect addressing Attachment untitled.JPG (2248 Downloads)
	Denilson Pegaia Siemens Industry Sector Technical Support
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