TCP_ServerAcceptConnection block
Short summary
Name |
|
→POU type |
|
Category |
more system blocks, network blocks, block with internal error diagnostic |
|
|
Graphical interface |
|
Available since |
version 3.2.2 (for library This block is supported for these target systems or platforms:
|
Functionality
The block accepts an incoming client connection.
Inputs, outputs, return value
|
Identifier |
Description |
|
---|---|---|---|
Inputs: |
|
|
→TCP handle |
Outputs: |
|
|
IP address from client |
|
|
IP port from client |
|
|
|
handle of the client address and port |
|
Return value: |
|
|
returns the status of the TCP operation:
|
Input EN
and output ENO
are available when →calling the block. See "Execution control: EN, ENO" for information on input EN
and output ENO
.
See:
-
"Blocks for safe logic" whether this block is supported for developing safety-relevant applications.
-
"Highlighting safe logic in the FBD-editor" for the effects when using the block as a block for safe logic.
Internal error diagnostic for block
The block checks the following error cases:
-
Too many system resources are reserved.
-
There are no client connections.
In such an error case, the output ENO
of the block is set to value FALSE
(or an equivalent). Moreover, the block returns the appropriate code (see the above table).
Example for usage within ST-editor
See "TCP_ServerOpen block".