Home
Function/Function Block Reference
IEC 61131-3 Functions and Function Blocks
Selection
MOVE

MOVE

Type

Function

Description

Assigns the variable connected to IN to the variable connected to OUT.

Parameters

Input

Data type:	ANY
Description:	Input value.

Output

OUT

Data type:	ANY
Description:	Output value.

Error behavior

The following table shows the errors which may occur while executing the function and the value returned by the function in the corresponding error case.

Error case	Output value
IN = NaN Note: ENO stays true in the error case.	NaN
IN = Inf+ Note: ENO stays true in the error case.	Inf+
IN = Inf- Note: ENO stays true in the error case.	Inf-
Resulted string too short	Empty string

Note
String comparison: In case of a string error, the function returns the empty string ''. Furthermore, the controller runtime logs the error in its error catalog and a corresponding error message is shown in the Error List.

Note
Controller stop on string error: The controller can be automatically stopped when a string error occurs. This allows you to locate the error in your project. To enable the automatic stop of the controller in case of a string error, activate the

button in the Cockpit toolbar of the controller.

Additional information

EN/ENO behavior

The POU is only executed if TRUE is applied to the EN input. If EN = FALSE, the POU is not executed and ENO = FALSE indicates the inactivity.

There is no error case (see "Error behavior" above) which sets ENO to FALSE.

Invalid real values are passed to the output without setting ENO to FALSE because the function does not interpret values.

Further Info
See the topic "General information on execution control with EN/ENO" for further details.