FB_DALI300GenericInstance

The function block is used for the direct reading of generic values of an instance of a DALI control device that supports Part 103 (instance type 0).

The input variable bEnableInstance can be used to configure whether the instance is enabled.

If necessary, the output value can also be queried immediately via the variable bQueryInputValue, even if the corresponding instance is not enabled.

The existing parameters can be overwritten by changing the properties listed below. All parameters are written to the DALI control device by a positive edge at bInitialize and stored there.

The outputs with the output values of the DALI device only contain valid values if the function block was executed without errors (bError = FALSE). If the output bError = TRUE, the outputs with the output values must not be evaluated.

	The function block cannot be used when using the KL6811.

Inputs

VAR_INPUT
  bInitialize                 : BOOL  := FALSE;
  nShortAddress               : BYTE  := 0;
  nInstanceNumber             : BYTE  := 0;
  nResolution                 : BYTE  := 10;
  bQueryInputValue            : BOOL  := FALSE;
  nOptions                    : DWORD := 0;
END_VAR

Name	Type	Description
bInitialize	BOOL	The configuration of the DALI control device is started by a positive edge at this input. During this time no DALI commands are processed.
nShortAddress	BYTE	Short address (0…63) of the DALI control device.
nInstanceNumber	BYTE	Number of the instance (0…31) of the DALI control device to be addressed.
nResolution	BYTE	Vendor-specific resolution (1...64) of the input value. The value specifies the number of bits with which the input value is scaled.
bQueryInputValue	BOOL	Immediate query of the measured value. A query is possible even if the instance is disabled via the bEnableInstance property.
nOptions	DWORD	Reserved for future extensions.

Outputs

VAR_OUTPUT
  bError                  : BOOL;
  ipResultMessage         : I_TcMessage;
  bInitializing           : BOOL;
  bReadingInputValue      : BOOL;
  nValue                  : ULINT;
END_VAR

Name	Type	Description
bError	BOOL	This output is switched to TRUE if an error occurs during the execution. Further information about the error can be queried via the variable ipResultMessage. The output is set to FALSE again as soon as bBusy switches to TRUE.
ipResultMessage	I_TcMessage	Interface pointer (see Error evaluation) that can be used to obtain detailed information about the processing of the function block (see runtime messages). The interface pointer is valid after bBusy has changed from TRUE to FALSE.
bInitializing	BOOL	The output is set as soon as the initialization of the DALI control device has been started, and remains active until all DALI commands have been executed.
bReadingInputValue	BOOL	The output is set as soon as the manual reading of the measured value has been started and remains active until all DALI commands have been processed.
nValue	ULINT	Outputs the measured value.

Properties

All parameters that are written to the DALI control device via bInitialize are available as properties.

Name	Type	Access	Initial value	Description
bEnableInstance	BOOL	Get, Set	TRUE	The instance can be enabled or disabled on the DALI control device. If this property is FALSE, sending events from this instance is disabled. However, the actual value of the instance can still be queried via the input bQueryInputValue.
nEventFilter	DWORD	Get, Set	16#00_00_00_00	Setting of the event filter.
eEventPriority	E_DALIEventPriority	Get, Set	MiddleLow	Setting of the event priority.
ipDALICommunication	I_DALICommunication	Get, Set	0	Interface pointer to communication block (see Transfer of the reference to the communication block).

Requirements

Development environment	Required PLC library
TwinCAT from v3.1.4024.11	Tc3_DALI from v3.5.0.0