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ANY Pointer data type as OUT parameter in FC

9/12/2007 8:06 PM	Rate (0)
Dilcue Posts: 3 Rating: (0)	I amlooking for a method to transfer an ANY pointer created as a temporary variable in an FC to an OUT parameter of data type ANY. An ANY pointer is created in local memory as a temporary variable. The ANY pointer references data in a global DB. I then need to transfer this ANY pointer to the OUT variable (data type ANY). FUNCTION VAR_INPUT ENABLE : BOOL ; END_VAR VAR_OUTPUT PUN : ANY ; END_VAR VAR_TEMP tempPUN_ANY : ANY ; END_VAR BEGIN NETWORK // Create ANY pointer toDB Globaldata LAR1 P##tempPUN_ANY; L W#16#1002; //Syntax-ID=10 Hex / Type=02 Hex for data type "Byte" T LW [AR1,P#0.0]; L 18; //Number of Bytes to copy T LW [AR1,P#2.0]; L 1003; //DB number of the Task Status data T LW [AR1,P#4.0]; L 2127; //Area pointer SLD 3; OD DW#16#87000000; T LD [AR1,P#6.0]; Now, how can I transfer this pointer that references the Global DB data as an OUT parameter of the FC?
Dilcue Posts: 3 Rating: (0)
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9/12/2007 9:39 PM	Rate (1)
Thijs Posts: 121 Rating: (16)	The only method I've found is to move te data forming the any pointer from the internal memory to the out memory. I mostly use the following construction [code] LAR1 p##tAny_pointer // pointer in internal memory L p##oAny_pointer // pointer to OUT data LAR2 // move the any pointer data L D [ar1,p#0.0] T D [ar2,p#0.0] L D [ar1,p#4.0] T D [ar2,p#4.0] L W [ar1,p#8.0] T W [ar2,p#8.0] [/code]
Thijs Posts: 121 Rating: (16)
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9/12/2007 10:18 PM	Rate (0)
Dilcue Posts: 3 Rating: (0)	Thank you. Works great!
Dilcue Posts: 3 Rating: (0)
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9/13/2007 12:51 PM	Rate (1)
Aret Posts: 2348 Rating: (265)	I would recommend also to add some code before working with AR1 (in case you would use complex-type variables on I/O of FC) //save AR1 and DB to temp variables L DBNO T #Temp_DBno TAR1 T #Temp_AR1 .... work with AR1 //restore AR1 and DB from temp variables OPNDB [#Temp_DBno] L#Temp_AR1 LAR1
Aret Posts: 2348 Rating: (265)
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9/13/2007 8:18 PM	Rate (1)
Thijs Posts: 121 Rating: (16)	When saving reference data specialy in a FB structure, don't forget to save the AR2 register. This one contains the FB callup path.
Thijs Posts: 121 Rating: (16)
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