POW

Raises Value to Power and stores the result in Result.

Ladder representation

Block structure

Variable Type	Name	Data Type	Description
VAR_INPUT	EN	BOOL	Block enabling.
VAR_INPUT	Value	REAL	Operation base.
VAR_INPUT	Power	REAL	Operation power.
VAR_OUTPUT	Done	BOOL	End of operation.
VAR_OUTPUT	Result	REAL	Variable that stores the operation result.

Operation

When EN is TRUE, the block writes the value of Value raised to Power to Result.

If the operation completes without errors, Done is set. If an operation error occurs, Done remains FALSE and Result keeps its previous value.

When EN is FALSE, Result remains unchanged and Done remains FALSE.

Execution flowchart

Examples

Ladder Example

This example raises VALUE to POWER and stores the final result in RESULT. The block completes successfully and activates Done.

This example raises VALUE to POWER and stores the final result in RESULT. The block completes successfully and activates Done.

This example raises VALUE to POWER and stores the final result in RESULT. Because the result is greater than the maximum value supported by REAL, the block reports an error and disables Done.

Structured Text Example

The following Structured Text code applies the same logic shown in the Ladder example.

Structured Text

VAR
    VALUE : REAL := 16;
    POWER : REAL := -40;
    RESULT : REAL;
END_VAR

RESULT := FB_POW(
    EN:=DI1,
    Value:=VALUE,
    Power:=POWER,
    Done=>DO1);