SimpleWriteArrayOfWord

SimpleWriteArrayOfWord (FB)

FUNCTION_BLOCK SimpleWriteArrayOfWord

Triggering the transmission of Modbus data

The data transmission is triggered if at least one of the conditions described below is met:

Prerequisite: A suitable array is connected at the input 'arwInputArray'. This is signaled by the output 'xInputArrayValid' (= TRUE).

1. after an edge change at the input 'xUpdateSetp' (FALSE >> TRUE) (one-time)

2. after the time duration 'tTimeUpdateSetp' has elapsed ('tTimeUpdateSetp' > 0) (cyclic)

3. after a change of the array at the input 'arwInputArray' (data type, size, contents) (one-time)

4. after a change of essential parameters ('byUnitId', 'wRegisterAddr') (one-time)

5. after an edge change at the input 'xEn' (FALSE >> TRUE) (one-time)

6. after every cold start (one-time)

Note: As of 07.07.2023 the data type of the array at the input 'arwInputArray' cannot be detected and evaluated (CDS-43675 Compiler, AnyType: Extension for Arrays needed). The tooltip help for the input 'arwInputArray' shows the possible array data types depending on the chosen function code.

InOut:

Scope	Name	Type	Initial	Comment
Input	xEn	BOOL	TRUE	Enable / disable communication (TRUE = enable)
Input	byUnitId	BYTE	0	Modbus address of the device
Input	arwInputArray	__SYSTEM.AnyType		Input for the array of data to be written (FC16, ARRAY OF WORD, ARRAY OF UINT (16 bits per element))
Input	xUpdateSetp	BOOL	FALSE	Update setpoints (on every rising edge)
Input	xResError	BOOL	FALSE	Reinitialize the outputs 'eErrorCodeCom' and 'eErrorCodeDev' to the fault-free state (on every rising edge)
Inout	ModbusClient	ModbusClientBase		Client of the device
Output	wRegisterAddrFb	WORD	0	Feedback - start address of the register for the Modbus telegram
Output	diInputArrayNumb	DINT	0	Number of array elements at the input 'arwInputArray'
Output	xInputArrayValid	BOOL	FALSE	Validity of the array at the input 'arwInputArray' (data type, size) (FALSE = not valid, TRUE = valid)
Output	xAlarm	BOOL	FALSE	Collective fault (TRUE = fault)
Output	xAlarmCom	BOOL	FALSE	Collective fault - communication (TRUE = fault)
Output	eErrorCodeCom	ModbusErrorCode	ModbusErrorCode.NO_ERROR	Error code - communication (0 = no error)
Output	eErrorCodeDev	SIMPLE_WRITE_ARRAY_OF_WORD_ERROR_CODE	SIMPLE_WRITE_ARRAY_OF_WORD_ERROR_CODE.NO_ERROR	Error code - device (0 = no error)
Output	xBusy	BOOL	FALSE	Communication indicator (TRUE = communication)
Input Const	wRegisterAddr	WORD		Start address of the register for the Modbus telegram
Input Const	tTimeUpdateSetp	TIME	TIME#0ms	Update interval for the operations influenced by the input ‘xUpdateSetp’