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2 Visual Components Manuals

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Introduction to <strong>Visual</strong> <strong>Components</strong> 2.3<br />

deleted (see also Start Picture).<br />

ScreenSaver Pic:<br />

A picture can be selected as a screen saver from a list of all the pictures in the project. This picture is shown<br />

automatically after a specified amount of time has passed. Setting the time is explained in the following section.<br />

In contrast to conventional screen savers, this one does not automatically switch back to the picture displayed<br />

before it was activated. This must be set explicitly when configuring the application project.<br />

The time period before the screen saver activates is set in minutes. A variable from the controller can also be<br />

used to do this. Note that values have to be specified in seconds when enabling screen savers with RPS<br />

variables. Values < 60 are not allowed.<br />

This time begins after each time a key is pressed (phys. key or touch key).<br />

Activate Screen Saver:<br />

The screen saver mode is activated when this option is selected.<br />

Use Global Picture:<br />

A global picture can be selected for the project by selecting this option. A picture with the name "GLOBAL" is<br />

added to the picture list when this option is selected (see also Defining the Global Picture).<br />

Backlight Switch Off:<br />

The background light (or display) can be automatically shut off after a specified time by selecting this option. The<br />

time is set in minutes.<br />

Note:<br />

Not all panels support this option.<br />

Ignore First Key During Background Lighting:<br />

If this option is selected, only the background lighting is affected (turned on) when the first key is pressed.<br />

Otherwise, the first keystroke will carry out the task it was designed to do.<br />

Manual Project Start:<br />

If this option is selected, then a project cannot be automatically started on the target system. The project can be<br />

started after completing specific control application initializations.<br />

A special function block from the VISAPI interface is provided for this. This function block also supports specific<br />

CAN interface initializations for the project (see also VA_StartProject).<br />

4.3.14.1.3 Global Settings<br />

Transfer Key Matrix:<br />

This field enables the transfer of a key matrix to the control program. The status of all keys (0=not pressed,<br />

1=pressed) is transferred to a byte array in the PLC where it can be evaluated.<br />

The matrix also contains buttons for touch displays. Information is transferred asynchronous to the PLC program<br />

procedure.<br />

4.3.14.1 Project−Specific Configuration 303

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