FB_SocketSend
Using the function block FB_SocketSend, data can be sent to a remote client or remote server via the TwinCAT TCP/IP Connection Server. A remote client connection will first have to be established via the function block FB_SocketAccept, or a remote server connection via the function block FB_SocketConnect.
Inputs
VAR_INPUT
sSrvNetId : T_AmsNetId := '';
hSocket : T_HSOCKET;
cbLen : UDINT;
pSrc : POINTER TO BYTE;
bExecute : BOOL;
tTimeout : TIME := T#5s;
END_VAR
Name | Type | Description |
|---|---|---|
sSrvNetId | T_AmsNetId | String containing the network address of the TwinCAT TCP/IP Connection Server. For the local computer (default) an empty string may be specified. |
hSocket | T_HSOCKET | Connection handle of the communication partner to which data are to be sent. |
cbLen | UDINT | Number of date to be sent in bytes. |
pSrc | POINTER TO BYTE | Address (pointer) of the send buffer. |
bExecute | BOOL | The function block is enabled by a positive edge at this input. |
tTimeout | TIME | Maximum time allowed for the execution of the function block. |
 | Setting the execution time of the function block If the transmit buffer of the socket is full, for example because the remote communication partner receives the transmitted data not quickly enough or large quantities of data are transmitted, the FB_SocketSend function block will return ADS timeout error 1861 after the tTimeout time. In this case, the value of the tTimeout input variable has to be increased accordingly. |
Outputs
VAR_OUTPUT
bBusy : BOOL;
bError : BOOL;
nErrId : UDINT;
END_VAR
Name | Type | Description |
|---|---|---|
bBusy | BOOL | This output is active if the function block is activated. It remains active until acknowledgement. |
bError | BOOL | If an error should occur during the transfer of the command, then this output is set once the bBusy output was reset. |
nErrId | UDINT | If an bError output is set, this parameter returns the TwinCAT TCP/IP Connection Server error number. |
Requirements
|
Development environment |
Target system type |
PLC libraries to include (category group) |
|---|---|---|
|
TwinCAT v3.1.0 |
PC, or CX (x86, X64, ARM) |
Tc2_TcpIp (communication) |