Client (FB)

FUNCTION_BLOCK ABSTRACT Client IMPLEMENTS IClient

MODBUS client (master) base class.

Client provides the communication infrastructure for ClientRequest to work with.

InOut:

Scope	Name	Type	Initial	Comment
Input	xConnect	BOOL	FALSE	Connect to server (slave).
Output	xConnected	BOOL		Client (master) is connected to server (slave).
	xError	BOOL		Error
	eErrorID	Error		Error status
	udiNumMsgSent	UDINT		Number of request messages send since connect.
	udiNumMsgReply	UDINT		Number of reply messages received since connect.
	udiNumMsgExcReply	UDINT		Number of exception reply messages received since connect.
	udiNumMsgExcReplyIllFct	UDINT		Number of exception reply messages received since connect, signaling illegal function.
	udiNumMsgExcReplyIllDataAdr	UDINT		Number of exception reply messages received since connect, signaling illegal data address.
	udiNumReplyTimeouts	UDINT		Number of reply timeouts since connect.
	udiNumReqNotProcessed	UDINT		Number of requests not processed in time (“request starvation”) since connect.
	udiNumReqParamError	UDINT		Number of requests started with parameter error, for example “Read Coils” -> “Quantity of coils” = 0.
	udiLastTransactionTime	UDINT		Transaction time in ms - time difference between request message send und reply message received.