Detailed description
2.12 Block descriptions
Basic logic functions: PLC basic program solution line (P3 sl)
152 Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Pulse diagram
'RQH
5HT
(UURU
(1) Activation of function
(2) Positive acknowledgment: variables have been written
(3) Reset function activation after receipt of acknowledgment
(4) Signal change by means of FB
(5) Not permissible
(6) Negative acknowledgment: Error has occurred, error code in output parameter "State"
Call example
Reading of a GUD variable with the name "GUDVAR1" as an integer variable
(see also table in FB 2: Assignment of NC data type in SIMATIC data type).
Call and parameterization of FB 5 with instance DB 111:
DATA_BLOCK DB GUDVAR
//Assignment to symbol table
STRUCT
GUDVar1 : STRING[32] := 'GUDVAR1';
//Name is defined by user
GUDVar1T :
STRUCT
SYNTAX_ID : BYTE ;
area_and_unit : BYTE ;
column : WORD ;
line : WORD ;
block type : BYTE ;
NO. OF LINES : BYTE ;
type : BYTE ;
length : BYTE ;
END_STRUCT;
END_STRUCT;
BEGIN
END_DATA_BLOCK
DATA_BLOCK DB 111
//Unassigned user DB, as instance for FB 5
FB 5
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