Do you have a screenshot of the SCL to share so we can try to spot a problem.

Are you getting an error or status output?

Does your REQ trigger level change from low to high when you want to send? The help file is fairly descriptive on what must happen in what order for it to send data.

[code]

Description

The "TSEND_C" instruction is executed asynchronously and has the following functions:

Setting up and establishing a communications connection:

"TSEND_C" Sets up and establishes a TCP or ISO-on-TCP communications connection. After the connection is set up and established, it is automatically maintained and monitored by the CPU. The connection description specified at the CONNECT parameter is used to set up the communications connection.

To establish a connection, the CONT parameter must be set to the value "1". If connection establishment is successful, the DONE parameter is set to "1" for one cycle. An existing connection is terminated and the setup connection is removed when the CPU goes to STOP mode.

To set up and establish the connection again, you must execute "TSEND_C" again. For information on the number of possible communications connections, refer to the technical specifications for your CPU.

Sending data via an existing communications connection:

You specify the send area with the DATA parameter. This includes the address and the length of the data to be sent. Do not use a data area with the data type BOOL or Array of BOOL at the DATA parameter. If you use purely symbolic values at the DATA parameter, the LEN parameter must have the value "0".

The send job is executed when a rising edge is detected at the REQ parameter.

With the LEN parameter, you specify the maximum number of bytes sent with a send job.

When sending data (rising edge at the REQ parameter), the CONT parameter must have the value "1" in order to establish or maintain a connection.

The data to be sent must not be edited until the send job has completed. If the send job executes successfully, the DONE parameter is set to "1".

Signal state "1" at the DONE parameter does not imply confirmation that the sent data has already been read by the communications partner.

Terminating the communications connection:

The communications connection is terminated when the CONT parameter is set to "0".

TSEND_C is executed again when the COM_RST parameter is set to "1".

This terminates the existing communications connection and a new connection is established.

If data is being transferred when it executes again, this can lead to a loss of data.

[/code]

How are you configuring the CONNECT parameter? This is a fairly advanced function and the provided on-line help file is barely sufficient to describe what is required.

Hruod

You canpost asimple example?
I tried toset theCONNECT parameterbutdid not succeed!
On the forumI have not foundany otherthreads thatmighthelp me...someonehas mysame problem?

Thanks, regards

Roberto

//----------------------------------------------------------------------
// Send via TCP using TSEND_C
//----------------------------------------------------------------------

IF "FirstScan" THEN
//
// ----------connection parameter settings -----------------------------
//
//----------------------------------------------------------------------
// #CONNECT_SET.ID := 1; // default
// #CONNECT_SET.CONNECTION_TYPE := 17; // default
// #CONNECT_SET.ACTIVE_EST := true; // default
// #CONNECT_SET.LOCAL_DEVICE_ID := 1; // default
// #CONNECT_SET.LOCAL_TSAP_ID_LEN := 0; // default
// #CONNECT_SET.REM_SUBNET_ID_LEN := 0; // not used
// #CONNECT_SET.REM_STADDR_LEN := 4; // default
// #CONNECT_SET.REM_TSAP_ID_LEN := 2; // default
// #CONNECT_SET.NEXT_STADDR_LEN := 0; // not used
//
// local port - must be unique in within entire application
//
#CONNECT_SET.LOCAL_TSAP_ID[1] := B#16#00; // high byte of port
#CONNECT_SET.LOCAL_TSAP_ID[2] := 200; // low byte of port on local host
//
// #CONNECT_SET.REM_SUBNET_ID[1] := 0; // not used
//
// remote host IP address
//
#CONNECT_SET.REM_STADDR[1] := 192;
#CONNECT_SET.REM_STADDR[2] := 168;
#CONNECT_SET.REM_STADDR[3] := 200;
#CONNECT_SET.REM_STADDR[4] := 20;
//
// remote host port
//
#CONNECT_SET.REM_TSAP_ID[1] := 0; // high byte of port on remote host
#CONNECT_SET.REM_TSAP_ID[2] := 80; // low byte of port on remote host
//
// #CONNECT_SET.NEXT_STADDR[1] := 0; // not used
END_IF;

/////////////////////////////////////////////////////////////////////

"TSEND_C_DB"(REQ:=_in_,
CONT:=_in_,
LEN:=_in_,
DONE=>_out_,
BUSY=>_out_,
ERROR=>_out_,
STATUS=>_out_,
CONNECT:=#CONNECT_SET,
DATA:=_inout_,
COM_RST:=_inout_);

//----------------------------------------------------------------------

[/code]

Create a tag of type TCON_Param and set all the correct parameters as per the help file.