A function calculates a result according to the current value of its inputs. A function has no internal data and is not linked to declared instances. block - Extract bits of a byte
Inputs
IN : USINT 8 bit register
Outputs
Q0 : BOOL Less significant bit
...
Q7 : BOOL Most significant bit
Remarks
In FFLD language, the output rung is the Q0 output. The operation is executed only in the input rung (EN) is TRUE.
ST Language
(* MyUnpack is a declared instance of the UNPACK8 function block *)
MyUnpack (IN);
Q0 := MyUnpack.Q0;
Q1 := MyUnpack.Q1;
Q2 := MyUnpack.Q2;
Q3 := MyUnpack.Q3;
Q4 := MyUnpack.Q4;
Q5 := MyUnpack.Q5;
Q6 := MyUnpack.Q6;
Q7 := MyUnpack.Q7;
FBD Language
FFLD Language
(* The operation is performed if EN = TRUE *)
IL Language:
(* MyUnpack is a declared instance of the UNPACK8 function
block *)
Op1: CAL MyUnpack (IN)
FFLD MyUnpack.Q0
ST Q0
(* ... *)
FFLD MyUnpack.Q7
ST Q7
See also
