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

NOW

Function Name	NOW
Description	Outputs the current date and time (taken from the server when the Logic program executes)
Arguments	None.
Returns	Output {DATE_AND_TIME} For more information on the data types for the inputs and outputs, see Data Type Hierarchy.

Function Name

NOW

Description

Outputs the current date and time (taken from the server when the Logic program executes)

Arguments

None.

Returns

Output {DATE_AND_TIME}

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

Example:

Function Block Diagram - NOW:

A NOW function can be used as an input for other functions, for example, as an input for an ADD_DT_TIME function. The NOW function provides the current date and time.

ST Program - NOW:

The syntax for a NOW function in an ST Program is:

Output := NOW()

The NOW function can also be used in place of a Date and Time Input in an ST Program:

Output := ADD_DT_TIME (NOW, Input 2)

Where Output and Input 2 are defined as variables earlier in the ST program. The NOW function replaces Input 1 (it provides the current date and time for Input 1).