LOW_INT: Extracting the least significant word of a double integer

Description of the function

The function LOW_INT extracts the least significant word of a double integer.

The additional parameters and can be configured.

Representation in FBD

Representation:

Representation in LD

Representation:

Representation in IL

Representation:

LD Double_Int

LOW_INT

ST Low_Int

Representation in ST

Representation:

Low_Int := LOW_INT(Double_Int);

Description of parameters

The following table describes the input parameters:

Parameter	Type	Comment
Double_Int	DINT	Double integer whose least significant word is extracted.

The following table describes the output parameters:

Parameter	Type	Comment
Low_Int	INT	The least significant word extracted from the double integer Double_Int.

EN stands for ENable; it is an optional block input. When the EN input is enabled, an ENO output is set automatically.

If EN = 0, the block is not enabled; its internal program is not executed, and ENO is set to 0.

If EN = 1, the block's internal program is run and ENO is set to 1. If an error occurs, ENO is set to 0.

If the EN input is not connected, it is set automatically to 1.

ENO

ENO stands for Error NOtification; this is the output associated with the optional input EN.

If ENO is set to 0 (because EN = 0 or in case of an execution error):

the status of the function block outputs remains the same as it was during the previous scanning cycle that executed correctly;
the output(s) of the function, as well as the procedures, are set to "0".