Traffic light

The described widget is suitable for displaying a traffic light in the app. The various configuration options are described below. In the figure all available features of the widget are active.

The widget is transferred as a substructure in the overall structure of the SendData() method. To build the widget, various PLC attributes are used when declaring the structure.

{attribute 'iot.ReadOnly' := 'false'}
{attribute 'iot.DisplayName' := 'Name for Widget'}
{attribute 'iot.WidgetType' := 'TrafficLight'}
{attribute 'iot.ModeVisible' := 'true'}
{attribute 'iot.ModeChangeable' := 'true'}
stTrafficLightWidgetSample : ST_TrafficLightWidgetSample;

Attribute	Data type	Description
iot.ReadOnly	BOOL	Determines whether the widget on the app side gets only read access (TRUE) or also additional write access to the PLC (FALSE).
iot.DisplayName	STRING	The display name of the widget in the app. This will be overwritten by sDisplayName as soon as sDisplayName is not an empty string.
iot.WidgetType	STRING	Type specification for the widget, in this case: TrafficLight.
IoT.ModeVisible	BOOL	Determines whether the mode is displayed (TRUE) or not (FALSE).
IoT.ModeChangeable	BOOL	Determines whether the mode is adjustable (TRUE) or not (FALSE).

TYPE ST_TrafficLightWidgetSample :
STRUCT
    sDisplayName    : STRING := '';
    nError          : USINT;
    bRedOn          : BOOL;
    bYellowOn       : BOOL;
    bGreenOn        : BOOL;
    sMode           : STRING := 'Automatic';
    aModes          : ARRAY[0..1] OF STRING := ['Manual', 'Automatic'];
END_STRUCT
END_TYPE

Attribute	Data type	Description	Display in widget
sDisplayName	STRING	Determines the display name of the widget and overwrites the PLC attribute 'iot.DisplayName'.	Display text of the widget.
nError	USINT	Determines whether the widget is in an error state. 0 - No error 1 - Warning 2 - Error 3 - Critical error	Between icon and display name of the widget.
bRedOn	BOOL	Switches the red light of the traffic light on (TRUE) or off (FALSE).	On the right of the three circles.
bYellowOn	BOOL	Switches the yellow light of the traffic light on (TRUE) or off (FALSE).	In the middle of the three circles.
bGreenOn	BOOL	Switches the green light of the traffic light on (TRUE) or off (FALSE).	On the left of the three circles.
sMode	STRING	Mode of the traffic light.	The currently displayed mode.
aModes	ARRAY [0..n] OF STRING	Array of the different modes that can be set by the user.	By pressing on the current mode, the adjustable modes can be displayed.