Equipments (Devices) > SCA06 > Ladder > Math > Math Extended

Block that rounds the value of Value, storing the result in Result.

Ladder Representation

Block Structure

Variable Type	Name	Data Type	Description
VAR_INPUT	EN	BOOL	Block enabling
VAR_INPUT	Value	REAL	Reference variable for the operation
VAR_OUTPUT	Done	BOOL	End of operation
VAR_OUTPUT	Result	REAL	Variable that stores the result of the operation

Operation

When this block has a TRUE value in EN, it sends to the Result output the rounded value of Value. If no errors, the Done variable is set. If there is any error in the operation, Done is not set, staying in FALSE status, while Result remains with its value unchanged.

When EN has FALSE value, Result remains unchanged and Done remains in FALSE.

Compatibility

Device	Version
PLC300	2.10 or higher
SCA06	2.00 or higher

Block Flowchart

ROUND_flowchart

Example in Ladder

ROUND_example01

The above example rounds the value of the VALUE variable, storing the final result in RESULT. Decimals less than 0.5 are discarded. The block ends with success and Done output is activated.

ROUND_example02

The above example rounds the value of the VALUE variable, storing the final result in RESULT. Decimals greater than or equal to 0.5 promote unity value immediately above. The block ends with success and Done output is activated.

Example in ST

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

VAR

VALUE : REAL := 52.5;

RESULT : REAL;

END_VAR

RESULT := FB_ROUND(EN:=DI1, Value:=VALUE, Done=>DO1);