P3: Basic PLC Program for SINUMERIK 840D sl
13.8 Structure and functions of the basic program
Basic Functions
892 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
During PLC power-up, DB20 was generated with a length of 28 bytes:
The structure of the machine data used is specified in a UDT:
MD14514 $MN_USER_DATA_FLOAT[0] 123.456
GP Parameter (OB 100):
CALL FB 1, DB 7 (
MCPNum := 1,
MCP1In := P#E0.0,
MCP1Out := P#A0.0,
MCP1StatSend := P#A8.0,
MCP1StatRec := P#A12.0,
MCP1BusAdr := 6,
MCP1Timeout := S5T#700MS,
MCP1Cycl := S5T#200MS,
NCCyclTimeout := S5T#200MS,
NCRunupTimeout := S5T#50S;
BP parameters (to scan runtime):
l gp_par.UDInt; //=4,
l gp_par.UDHex; //=2,
l gp_par.UDReal; //=1 )
DB 20
address data
0.0 123
2.0 456
4.0 789
6.0 1011
8.0 b#16#12
9.0 b#16#AC
10.0 1.234560e+02
TYPE UDT 20
STRUCT
UDInt : ARRAY [0 .. 3 ] OF INT ;
UDHex0 : ARRAY [0 .. 15 ] OF BOOL ;
UDReal : ARRAY [0 .. 0 ] OF REAL ; //Description as field, for
// later expansions
END_STRUCT;
END_TYPE
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