Equipments (Devices) > SCA06 > Ladder > Conversion > BOOL > REAL_TO

Block that performs the conversion of a REAL value into a BOOL value.

Ladder Representation

Block Structure

Variable Type	Name	Data Type	Description
VAR_INPUT	EN	BOOL	Block enabling
VAR_INPUT	Value	REAL	Value in REAL
VAR_OUTPUT	ENO	BOOL	End of operation
VAR_OUTPUT	Result	BOOL	Value in BOOL

Operation

When this block has a TRUE value in EN, it interprets the Value value as REAL and converts it into BOOL, storing in Result.

When EN has FALSE value, Result remains unchanged.

The ENO value forwards to the next Ladder block the EN value after the operation is completed.

Block Flowchart

REAL_TO_BOOL_flowchart

Example in Ladder

REAL_TO_BOOL_example01

REAL_TO_BOOL_example02

REAL_TO_BOOL_example03

REAL_TO_BOOL_example04

The examples above perform the conversion of VALUE variable, in REAL, into a BOOL value storing the final result in RESULT. The block ends with success and ENO output is activated. Notice in the last example that the values very close to the machine epsilon may result in an interpretation of the FALSE value.

Example in ST

The example below displays the instructions for applying the example above in the ST language.

VAR

VALUE : REAL := 0.008;

RESULT : BOOL;

END_VAR

RESULT := FB_REAL_TO_BOOL(EN:=DI1, Value:=VALUE, ENO=>DO1);