Unpack8

 Function Block A function block groups an algorithm and a set of private data. It has inputs and outputs. - Extract bits from a byte.

Inputs

Input	Data Type	Range	Unit	Default	Description
IN	USINT				8-bit register.

Outputs

Output	Data Type	Range	Unit	Description
Q0	BOOL	FALSE, TRUE		Less significant bit.
Q7	BOOL	FALSE, TRUE		Highest significant bit.

Remarks

• The operation is executed only in the input rung (EN) is TRUE.

FBD Language Example

FFLD Language Example

• In the FFLD language, the output rung is the Q0 output.
• The operation is performed if EN = TRUE.

IL Language Example

(* MyUnpack is a declared instance of the UNPACK8 function 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 *)
Op1: CAL MyUnpack (IN)
     FFLD  MyUnpack.Q0
     ST  Q0
     (* ... *)
     FFLD  MyUnpack.Q7
     ST  Q7

ST Language Example

(* 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;

See Also

Pack8