TCP_Client (FB)¶

FUNCTION_BLOCK PUBLIC FINAL TCP_Client EXTENDS LCon IMPLEMENTS IClient

Implements a TCP Client.

To connect to a TCP Server at the endpoint defined with itfIPAddress and uiPort the input xEnable should set to TRUE. While setup the connection xBusy is TRUE but xActive is FALSE. After the connection is established xActive and xBusy is TRUE and the itfConnection output is valid. After closing the connection from the server side xActive becomes FALSE itfConnection become invalid and xDone becomes TRUE.

itfConnection can be used as input itfConnection for function blocks TCP_Write, TCP_Writer, TCP_Read and TCP_Reader.

InOut:

Scope	Name	Type	Initial	Comment	Inherited from
Input	`xEnable`	`BOOL`		`TRUE`: Activates the defined operation `FALSE`: Aborts/resets the defined operation	LCon
Output	`xDone`	`BOOL`		Ready condition reached	LCon
	`xBusy`	`BOOL`		`TRUE`: Operation is running	LCon
	`xError`	`BOOL`		`TRUE`: Error condition reached	LCon
	`eErrorID`	ERROR			LCon
Input	`itfAsyncProperty`	IAsyncProperty
	`itfTLSContext`	ITLSContext
	`itfTSNContext`	ITSNContext
	`udiTimeOut`	`UDINT`	0	Defines the time (µs) after which the connection setup aborts with active `xError`.
	`itfIPAddress`	IIPAddress		The related server address (With ResolveHostname, the conversion from a hostname to an ip address is possible)
	`uiPort`	`UINT`		The related server port
Output	`xActive`	`BOOL`		TRUE if a Connection is established
Output	`itfConnection`	IConnection		The established connection to the related server Valid, as long `xActive` = `TRUE`

Methods:

SetInitialValue

Read

Upgrade

Write

Structure: