Extensions.HMI.Screen

Classification

Name	Screen
Short Description	A handle to a screen resource to the runtime system
Class	Complex Data Type
Base Data Type	ComplexType
Default Value	Empty
Provide a Literal	No
SpecifiedBy	ISO 13209-3
Standard Compliant	Yes

Description

The Screen data type is a handle to a screen resource on the runtime system. Screen-Handle provides an interface through which a OTX sequence representing data and can receive user input.

Since screen does not have any initialization parts, one can screen not be declared constant.

Core Conversion

The following table shows the rules for conversion to another data type:

Conversion	Result	Sample
ToBoolean	Undefined (should not be used)
ToInteger	Undefined (should not be used)
ToFloat	Undefined (should not be used)
ToString	Returns the name of the screen resource	String s = ToString(screenVariable); // Returns "ScreenSignatureName"
ToByteField	Undefined (should not be used)

Sample

HMI.Screen ScreenVariable;