martin3885
Member
How can I declare a UDT with variable of a type POINTER? What value should I place in initial value(Anfangswert in German)(I think in English it is initial value, I work with german version of Step7)
POINTER variable
- Thread starter martin3885
- Start date
SimonGoldsworthy
Member
You have to create another UDT to describe the layout of the pointer and then include this UDT in your first UDT
For example, I use the following UDT for an any pointer:
For example, I use the following UDT for an any pointer:
Code:
TYPE UDT190
STRUCT
byS7Valid : BYTE ; //0=null pointer, 10Hex=Valid S7 pointer
byType : BYTE ; //type, e.g 01=bool, 02=byte, 03=char etc. 0=null pointer
iNumberOfItems : INT ; //number of items of the type specified
iDataBlockNumber : INT ; //data block number
dwAreaPointer : DWORD ;
END_STRUCT ;
END_TYPESimilar Topics
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