FB_BA_Switch4DALI

The template is used to read a 4-fold switch.

Data exchange HMI

The data exchange with the HMI is realized here in the base class FB_BA_BaseSwitch (internal function block). The use of the following variable is visible in this template:

bInitializeIn: Start DALI initialization routine from the HMI.

Function

The device itself is specified by the instance numbers of the push buttons, nInstButton1 ... nInstButton4.

The device's internal notification system is always used, which automatically sends a telegram as soon as a button press or release is detected.

The states of the buttons are also queried cyclically in the internal function block FB_BA_Swi4DALI. This ensures that the state of the buttons is always corrected if a telegram is "lost".

The DALI push button function block can be initialized with its set parameters via the input bInitialize or via the HMI (bInitializeRm), see FB_BA_Swi4DALI.

The initialization of the template takes place within the method FB_Init.

Block diagram

Syntax

FUNCTION_BLOCK FB_BA_Switch4DALI EXTENDS FB_BA_Ext_SwitchBase
VAR_INPUT
  bEn                    : BOOL;
  bInitialize            : BOOL;
END_VAR
VAR_OUTPUT
  bButton1               : BOOL;
  bButton2               : BOOL;
  bButton3               : BOOL;
  bButton4               : BOOL;
  bInitializing          : BOOL;
  bErr                   : BOOL;
END_VAR
VAR_INPUT CONSTANT PERSISTENT
  nAdr                   : BYTE;
  nInstButton1           : BYTE := 0;
  nInstButton2           : BYTE := 1;
  nInstButton3           : BYTE := 2;
  nInstButton4           : BYTE := 3;
  ipDALICommunication    : Tc3_DALI.I_DALICommunication;
END_VAR
VAR_INPUT CONSTANT
  SwitchSns              : FB_BA_Swi4DALI;
END_VAR

VAR_INPUT

Name	Type	Description
bEn	BOOL	Enabling the function block: a TRUE signal at this input enables the function.
bInitialize	BOOL	A positive edge at this input starts the DALI initialization routine, which transfers the set parameters to the DALI device, see FB_BA_Swi4DALI.

VAR_OUTPUT

Name	Type	Description
bButton1...bButton4	BOOL	State of the individual push buttons (TRUE = pressed).
bInitializing	BOOL	The push button sensor is in the DALI initialization phase, i.e. the entered parameters are transferred to the DALI device.
bErr	BOOL	Error output. A plain text is output in TwinCAT in the error list in the output window.

VAR_INPUT CONSTANT PERSISTENT

Name	Type	Description
nAdr	BYTE	DALI individual address of the push button sensor.
nInstButton1...nInstButton4	BYTE	Numbers of the push button instances to be queried.
ipDALICommunication	Tc3_DALI.I_DALICommunication	Interface pointer to the DALI communication block.

VAR_INPUT CONSTANT

Name	Type	Description
SwitchSns	FB_BA_Swi4DALI	Function block for reading the push button sensor.