Siemens SINUMERIK 840D sl Function Manual page 1341

Symbolic accesses
An entry is made in the symbol table to allow data access in symbolic form:
Symbol
UData
Access operations in user program (list includes only symbolic read access):
...
...
Basic logic functions: PLC basic program solution line (P3 sl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Operand
DB 20
L "UData".UDInt[0];
L "UData".UDInt[1];
L "UData".UDInt[2];
L "UData".UDInt[3];
U "UData".UDHex0[0];
U "UData".UDHex0[1];
U "UData".UDHex0[2];
U "UData".UDHex0[3];
U "UData".UDHex0[4];
U "UData".UDHex0[5];
U "UData".UDHex0[6];
U "UData".UDHex0[7];
... ...
U "UData".UDHex0[15];
L "UData".UDReal[0];
2.7 Structure and functions of the basic program
Detailed description
Data type
UDT 20
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