Detailed description
2.12 Block descriptions
Power Line Basic PLC Program (P3)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-193
Additional parameters
The pointer parameters for the input and output data of the handheld unit must be
parameterized in the start OB 100 in FB 1, DB 7. Parameter BHGIn corresponds to the input
data of the PLC from the handheld unit (data received by PLC). Parameter BHGOut
corresponds to the output data of the PLC to the handheld unit (data transmitted by PLC).
These two pointers must be set to the starting point of the relevant data area, which is also
parameterized in SDB 210 with an MPI link.
Note
If the numerical converter is used to display information, then it is better to avoid performing
a conversion in every PLC cycle for the sake of reducing the PLC cycle time. In this case, it
is advisable to use the input signal from the HHU to the PLC "Acknowledgment digital
display" (DB m+5.7) for parameter "Convert". In this way it can be ensured that the most
recent numerical information is displayed.
Declaration of the function
STL representation
//The data block number DATA_BLOCK "strdat"
//is defined in the symbol file
STRUCT
disp: STRING [32]:= 'line 1 line
2 ';
//32 characters are defined
END_STRUCT;
BEGIN
END_DATA_BLOCK
FUNCTION FC 13: VOID
VAR INPUT
Row : Byte; //Display line (see table)
ChrArray : STRING ; //Transfer at least string[32]
Convert : BOOL ; //Activate numerical conversion
Addr: POINTER; //Points to the variable being
converted
DataType : Byte; //Data type of the variables
StringAddr : INT ; //Right-justified string address
(1 to 32)
Digits : BYTE ; //Number of decimal places (1 to
3)
END VAR
VAR OUTPUT
Error : BOOL ; //Conversion or string error
END VAR
To Next Page
Loading...
