FB_DALI_ToPushButtonState

Determines the static state from the events of a button.

For correct evaluation, the events Button Released (Bit 0) and Button Pressed (Bit 1) must be activated via the event filter.

	Release only those events that you need for the application. If too many events are sent, this can have a negative effect on the behavior of the application.

Inputs

VAR_INPUT
  nPushButtonEvent       : UINT;
END_VAR

Name	Type	Description
nPushButtonEvent	UINT	This variable contains the individual events of the push button, which are represented by the respective bits.

Bit	Description
0	Push button released.
1	Push button pressed.
2	Short keystroke.
3	Double keystroke.
4	Start long keystroke.
5	Repeat long keystroke.
6	Stop long keystroke.
7	Push button free again; was previously blocked.
8	Push button blocked.

The function block FB_DALI_ToPushButtonState can be used to convert the state of a push button into a BOOL variable.

Outputs

VAR_OUTPUT
  bPushButton    : BOOL;
END_VAR

Name	Type	Description
nPushButton	BOOL	This variable reflects the static state of the push button. The state was determined on the basis of the individual events.

Example

The example shows how the events of a 4-fold DALI push button are converted into four individual variables.

PROGRAM Demo_ST
VAR
  fbSwitchPanel         : FB_DALI_Lunatone_Cross_Switch(Communication.fbKL6821Communication);
  bInitialize           : BOOL;
  bError                : BOOL;
  bInitializing         : BOOL;
  aToPushButtonState    : ARRAY [1..4] OF FB_DALI_ToPushButtonState();
  aPushButton           : ARRAY [1..4] OF BOOL;
END_VAR

Program part in structured text:

fbSwitchPanel(    bInitialize := bInitialize,
                  nShortAddress := 0,
                  bInitializing  => bInitializing,
                  bError => bError);
aToPushButtonState[1](nPushButtonEvent := fbSwitchPanel.nPushButton1Event,
                      bPushButton => aPushButton[1]);
aToPushButtonState[2](nPushButtonEvent := fbSwitchPanel.nPushButton2Event,
                      bPushButton => aPushButton[2]);
aToPushButtonState[3](nPushButtonEvent := fbSwitchPanel.nPushButton3Event,
                      bPushButton => aPushButton[3]);
aToPushButtonState[4](nPushButtonEvent := fbSwitchPanel.nPushButton4Event,
                      bPushButton => aPushButton[4]);

Program part in the Continuous Function Chart (CFC):

Requirements

Development environment	Required PLC library
TwinCAT from v3.1.4024.25	Tc3_DALI from v3.10.5.0