ModbusRequest2 (FB)¶

FUNCTION_BLOCK ModbusRequest2

InOut:

Scope	Name	Type	Initial	Comment
Input	xExecute	BOOL		Rising edge: Action start Falling edge: Resets outputs If a falling edge occurs before the function block has completed its action, the outputs operate in the usual manner and are only reset if either the action is completed or aborted (xAbort), or in the event of an error. In this case, the corresponding output values (xDone, xError, iError) are present at the outputs for exactly one cycle.
	xAbort	BOOL		If this input is TRUE, the action is stopped immediately and all outputs are reset to their initial values.
	hComPort	RTS_IEC_HANDLE
	usiSlaveAddr	USINT		Slave address, range 1..247
	modbusCommand	ModbusCommand		The Modbus Command to be executed. Supports FCs for bit and word access
	tResponseTimeout	TIME		Timeout for the request in ms
	uiSendTimeout	UINT	100	Timeout sending request
	pSendData	POINTER TO BYTE		Pointer to a buffer holding the data to be send to the Slave
	pRecvData	POINTER TO BYTE		Pointer to a buffer for writing the data received from a Slave
	transmission	MB_Transmission		transmission type (RTU or ASCII)
Output	xDone	BOOL
	xBusy	BOOL
	xError	BOOL
	xAborted	BOOL
	uiDataLength	BYTE		length of modbus-data received from slave (in bytes)
	byModbusError	MB_ErrorCodes	MB_ErrorCodes.UNDEFINED	Specifies the current error as defined in the “MB_ErrorCodes” enumeration