Siemens SINUMERIK 840Di Function Manual page 1248

Detailed Description
2.7 Structure and functions of the basic program
Interrupts
Symbol
UData
Access operations in user program (list includes only symbolic read access):
...
...
2.7.11 Configuring machine control panel, handheld unit
General
Up to two machine control panels and one handheld unit can be in operation at the same
time. There are various connection options (Ethernet, PROFIBUS, MPI) for the machine
control panel (MCP) and handheld unit (HHU). It is possible to connect two MCPs to different
bus systems (mixed operation is only possible on Ethernet and PROFIBUS). This can be
achieved using FB1 parameter MCPBusType. In this parameter, the right-hand decade is
responsible for the first MCP and the left-hand decade for the second MCP.
2-54
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];
PLC Basic Program Solution Line (P3 sl)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Data type
UDT 20