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Problems with STRINGS in STRUCTs in SCL

Created by: nemblej at: 3/17/2010 9:53 AM (1 Replies)

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3/17/2010 9:53 AM	Rate (0)
nemblej Posts: 34 Rating: (3)	I'm having some strange problems with standard IEC string functions (DELETE, CONCAT, etc.) within the following setup: FB is created in SCL. FB contains a structure (Lets say StructureA). This structure contains a number of variables, including a string (lets say StringA1). If I simply call an IEC string function, for example: StructureA.StringA1:='ABC'; StructureA.StringA1:=DELETE(IN:=StructureA.StringA1,L:=1,P:=1); The code compiles, but once it is run, the PLC goes into STOP with an error that doesn't make sense to me in this case: "STOP due to processing error (OB not loaded or not possible, or no FRB) Breakpoint in user program: Cyclic program (OB1)" (Please take in consideration there are no breakpoints used / active, even the debug info is not compiled !) This does not happen if StringA1 is not contained in a STRUCT. StringA1:='ABC'; StringA1:=DELETE(IN:=StringA1,L:=1,P:=1); What's the reason for this ? Is there any workaround, short of copying avery string to a temporary placeholder before calling the IEC string functions ??
nemblej Posts: 34 Rating: (3)
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1/25/2011 12:02 PM	Rate (0)
Chilly_Garfield Posts: 316 Rating: (37)	Hi nemblej, The answer is a little late. I have no problem with code! How have you declare your variables?
Chilly_Garfield Posts: 316 Rating: (37)
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