Logic Guide - ACOS (Built-in Functions, Function Blocks, and Conversions)

ACOS

Function Name	ACOS
Description	Converts a REAL or LREAL input into an arc cosine (inverse cosine). The arc cosine value is the output and is also a REAL or LREAL.
Arguments	Input 1 {REAL or LREAL}. This value has to be between 0 and 1. For more information on the data types for the inputs and outputs, see Data Type Hierarchy.
Returns	Output {REAL or LREAL}. This value is in radians.

Function Name

ACOS

Description

Converts a REAL or LREAL input into an arc cosine (inverse cosine). The arc cosine value is the output and is also a REAL or LREAL.

Arguments

Input 1 {REAL or LREAL}. This value has to be between 0 and 1.

For more information on the data types for the inputs and outputs, see Data Type Hierarchy.

Returns

Output {REAL or LREAL}. This value is in radians.

Example:

Function Block Diagram - ACOS:

In this example, the input of 0.431 is provided by the CurrentValueFormatted property of a point. The ACOS function converts the value into an arc cosine value of 1.12519562771659 and this is used as the output.

ST Program - ACOS:

The syntax for an ACOS function in an ST Program is:

Output := ACOS (Input 1);

Where Output and Input 1 are defined as variables earlier in the ST program. The Input 1 variable represents a REAL or LREAL type of value (the output is the same type of value as Input 1).