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Extended instruction handling Variant pointer in TIA V13 - S71500.

Created by: Mr Lindh at: 3/11/2014 8:34 PM (13 Replies)

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3/11/2014 8:34 PM	Rate (2)
Mr Lindh Bronze Member Joined: 2/12/2011 Last visit: 11/13/2024 Posts: 95 Rating: (33)	Hi I Have put together a small example covering the new functions for handling variant pointers in TIA V13. See attached PDF. * DB_ANY_TO_VARIANT: Create a variant pointer to a DB. * TypeOf : Evaluate what data type that the variant pointer points at. * VariantGet : Read out data pointed out by a variant pointer. * VariantPut. : Write data to an area pointed out by a variant pointer. Still there are many missing functions in V13 and S71500, but this is a step in the right direction. Hope it can be helpful... //Mattias Lindh Attachment Example varant pointer S71500, TIA V13.pdf (5488 Downloads)
	Last edited by: Mr Lindh at: 3/11/2014 8:40 PM Last edited by: Mr Lindh at: 3/11/2014 8:35 PM Mr Lindh,
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This contribution was helpful to 4 thankful Users Denilson Pegaia KimSoul IBN-Service Sachinpatke

3/13/2014 11:37 AM	Rate (1)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 11/14/2024 Posts: 4352 Rating: (1452)	Hi, here there is some additional tips about VARIANT instructions: Example of use: IS_ARRAY: check if the VARIANT is an array CountOfElements: Get number of ARRAY elements TypeOfElements / TypeOf : Check element data type of a VARIANT tag VariantGet / VariantPut: Read / write VARIANT tag value – move part of the VARIANT contend MOVE_BLK_VARIANT: Move whole VARIANT (no partial moving) VARIANT_TO_DB_ANY: Read of DB number of VARIANT variable. TIP’s for VariantGet / VariantPut: 1 - The indexes start ALWAYS from 0 independently of the array definition (that e.g. starts with “1”) . 2 - The VARIANT input and the destination variable should have same “elementary data type” (i.e. Real, Int, etc.). That means, no automatically data type conversion is done by instruction. If VARIANT is an array, the destination variable should also be an array, but not necessarily with the same size. So if you need to read out one variable of the VARIANT, you could define the destination variable as “array [0..0] of…”. TIP’s for MOVE_BLK_VARIANT: 1 – Source and destination should be exactly the same data type configuration. TIP’s of VARIANT_TO_DB_ANY 1 – VARIANT_TO_DB_ANY just return the right value if the VARIANT is a Data Block which in an instance data block of an UDT (PLC Data Types) , SDT, or array DB’s. Else it returns “0”). 2 – The returned variable could be convert to UINT with “DB_ANY_TO_UINT” instruction. Attached there is a V13 sample project (V14 project posted at 01/11/2017). Attachment C:\Users\z0008iwv\Documents\Bluetooth Exchange Folder\Variant.zip (2206 Downloads)
	Last edited by: Denilson Pegaia at: 1/11/2017 11:35:12 AM Denilson Pegaia Siemens Industry Sector Technical Support
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This contribution was helpful to 5 thankful Users JoseMiguelZubi ramos_vigo Douglas Pinheiro jesusesmo Schuleon123

5/12/2014 2:10 PM	Rate (0)
ThaKibosh Bronze Member Joined: 5/31/2011 Last visit: 8/6/2024 Posts: 190 Rating: (31)	I have another question. With the instruction "GetSymbolName", it is possible to read out the symbolic name of a Variant in Runtime and convert it to a WString. Example "DB_Faceplates.P010" a link to an UDT inside a datablock. Now I wonder if it is also possible the other way around. That you can create a VARIANT pointer from a string? For example I would concate the string "DB_Faceplates." with a variable string holding the tag name for that UDT. In that way I would have "symbolic indirect adressing" without the need of an indexer tag. PS: In the attached programm (post above this one) the function "VARIANT_TO_DB_ANY" is giving an error while testing with PLCSIM V13.
	Last edited by: ThaKibosh at: 5/12/2014 2:52 PM Found another thing while testing Last edited by: ThaKibosh at: 5/12/2014 2:12 PM Last edited by: ThaKibosh at: 5/12/2014 2:11 PM Last edited by: ThaKibosh at: 5/12/2014 2:11 PM
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3/9/2015 12:15 PM	Rate (0)
naskarri Regular Member Joined: 5/21/2009 Last visit: 10/22/2024 Posts: 3 Rating: (0)	Good morning everyone. I am very intrested about Thakibosh needs. Anyone found something about build a variant from a string? Thank you.

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4/26/2015 12:27 PM	Rate (0)
Piroman Posts: 4 Rating: (0)	ThaKibosh ... In that way I would have "symbolic indirect adressing" without the need of an indexer tag... Hi, ThaKibosh. Can you explain please what is the mechanism of "symbolic indirect adressing WITH the an indexer tag" that you are using now? Will be grateful for some examples!
Piroman Posts: 4 Rating: (0)
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4/27/2015 8:54 AM	Rate (0)
ThaKibosh Bronze Member Joined: 5/31/2011 Last visit: 8/6/2024 Posts: 190 Rating: (31)	There is the "multiplex" option for tags, but you can also use an "indexer" tag. The problem with last is that you can't use optimised datablocks because you will need absolute adresses. When you insert a tag in the HMI (comfort / Advanced) select for "Access mode" absolute. Then when editing the adress you can choose a "HMI Tag" for the adrress. For example: DB100.DBD[IndexTag] When the above could be fully symbolic, it would be easier to create popups linking to different equipment without using absolute adressing. In WinCC v6+, you have a thing called "PictureWindows" with the option for a "TagPrefix". They should create that option for the new popups they made for Comfort / Advanced.
	Last edited by: ThaKibosh at: 4/27/2015 8:55:27 AM
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11/16/2015 5:28 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (999)	Nice training stuff, perhaps you can give us an update?
IBN-Service Posts: 8946 Rating: (999)	Last edited by: IBN-Service at: 11/16/2015 5:28:48 PM
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11/17/2015 8:34 AM	Rate (1)
ThaKibosh Bronze Member Joined: 5/31/2011 Last visit: 8/6/2024 Posts: 190 Rating: (31)	Update? Nothing changed so far as I know.

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3/23/2016 11:20 AM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4766 Rating: (122)	New question published by samuele.minelli is split to a separate thread with the subject Put an array [1..100] of bool of an FB's instance in the PII o PIQ of the PLC?. Best regards Min_Moderator

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10/31/2016 7:20 PM	Rate (0)
TerminalBuzz Silver Member Joined: 11/4/2011 Last visit: 8/25/2024 Posts: 253 Rating: (53)	HiDenilson Pegaia I've just tried your example with PLC SIM and got an error at the last instruction: #aaa := VARIANT_TO_DB_ANY(in := #Data, err => #RetVal); Error: 8154 The data block has the incorrect data type. My TIA Portal version is V13 SP1 Update 9 Any suggestions? Thanks.

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