ClientRequestReadCoils (FB)¶

FUNCTION_BLOCK ClientRequestReadCoils EXTENDS ClientRequestReadBits

ReadCoils client request (FC01).

For details about client request see ClientRequest.

InOut:

Scope	Name	Type	Initial	Comment	Inherited from
Input	xExecute	BOOL		Rising edge: Starts defined operation FALSE: Resets the defined operation after ready condition was reached	ETrigTo
	udiTimeOut	UDINT		Max. operating time for executing [µs], 0: No operating time limit	ETrigTo
Output	xDone	BOOL		Ready condition reached	ETrigTo
	xBusy	BOOL		Operation is running	ETrigTo
	xError	BOOL		Error condition reached	ETrigTo
Inout	rClient	Client		Reference to Client.	ClientRequest
Input	uiUnitId	UINT	0	Unit-Id to send the request to.	ClientRequest
	udiReplyTimeout	UDINT	(50 * 1000)	Reply timeout in µs - accepted maxmimum time between request message send and reply message receveived - default 50ms.	ClientRequest
	uiMaxRetries	UINT	0	Maximum number of request retries in case of “reply timeout”.	ClientRequest
Output	eErrorID	Error		Error status	ClientRequest
	eException	ExceptionCodes		Request exception code.	ClientRequest
	uiRetryCnt	UINT	0	Number of request retries in case of “reply timeout”.	ClientRequest
Input	uiStartItem	UINT	0	First “data item” to read.	ClientRequestRead
	uiQuantity	UINT	1	Number of “data items” to read. ReadCoils / ReadDiscreteInputs: 1 to 2000 ReadHoldingRegisters / ReadInputRegisters: 1 to 125	ClientRequestRead
	pData	POINTER TO ARRAY [0..0] OF BOOL	0	Pointer to result data array, memory has to be provided by caller.	ClientRequestReadBits