Detailed description
2.12 Block descriptions
Basic logic functions: PLC basic program solution line (P3 sl)
120 Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Call example
Writing of three channelspecific machine data of channel 1:
Select the three data with NC VAR selector and store in the file DB120.VAR:
Area Block Name Type Byte S7 Name
C[1] RP rpa[5] DOUBLE 4 rpa_5C1RP
C[1] RP rpa[11] DOUBLE 4 rpa_11C1RP
C[1] RP rpa[14) DOUBLE 4 rpa_14C1RP
Entry NCVAR for DB 120 with the S7 SYMBOL Editor:
Symbol Operand Data type
NCVAR DB 120 DB 120
File DB120.AWL must be compiled and transferred to the PLC.
Call and parameterization of FB 3 with instance DB 111:
DATA_BLOCK DB 111
//Unassigned user DB, as instance for FB 3
FB 3
BEGIN
Function FC "VariablenCall": VOID
END_DATA_BLOCK
U I 7.7; //Unassigned machine control panel key
S M 100.0; //Activate req.
U M 100.1; //Done completed message
R M 100.0; //Terminate job
U I 7.6; //Manual error acknowledgment
U M 102.0; //Error pending
R M 100.0; //Terminate job
CALL FB 3, DB 111 (
Req := M 100.0,
NumVar := 3, //Write 3 variables
Addr1 := NCVAR.rpa_5C1RP,
Addr2 := NCVAR.rpa_11C1RP,
Addr3 := NCVAR.rpa_14C1RP,
Error := M102.0,
Done := M100.1,
State := MW104,
SD1 := P#DB99.DBX0.0 REAL 1,
SD2 := P#DB99.DBX4.0 REAL 1,
SD3 := P#M110.0 REAL 1);
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