TcpClose

Description

This function block closes and releases a socket. You are responsible for closing any socket created by the TcpListen, TcpAccept, or TcpConnect function blocks, even if they have become invalid.

Figure 7-220: The TcpClose function block

Related Functions

TcpAccept, TcpBinReceive, TcpBinSend, TcpConnect, TcpIsConnected, TcpIsValid, TcpListen, TcpReceive, TcpSend

Arguments

Input

Execute	Description	On the rising edge A rising edge is the transition of a digital signal from low to high. It is also called positive edge close a socket.
	Data Type	BOOL
	Range	0, 1
	Unit	N/A
	Default	—
ID	Description	The ID of the client socket
	Data Type	UDINT
	Range	N/A
	Unit	N/A
	Default	—

Output

Done	Description	If TRUE, then the command completed successfully
	Data Type	BOOL
Error	Description	If TRUE, an error has occurred
	Data Type	BOOL
ErrorID	Description	Indicates the error if Error output is set to TRUE. See the table in Search IndexFile and TCP/IP Function Block ErrorID Output
	Data Type	DINT

Example

Structured Text

(* TcpClose example *)
CASE StepCounter OF
0:
   Inst_TcpClose(TRUE, MySocketID);
   StepCounter := StepCounter + 1;
1:
   Inst_TcpClose(TRUE, MySocketID);
   IF Inst_TcpClose.Done THEN
      Inst_TcpClose(FALSE, 0);
      StepCounter := StepCounter + 1;
   END_IF;
END_CASE;