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Using Ethernet.lib

Codesys V2.3 🇬🇧
raoul
2006-07-21
2006-07-24

  • raoul - 2006-07-21

    Hello all.

    I'm trying to use the Ethernet.lib library with a 750-842 controller. I want to make an UDP server listenning to UDP packet wich are broadcasted on the network.

    I'm doing this:

    VAR
socket: ETHERNET_SERVER_OPEN;
Read: ETHERNET_READ;
END_VAR
IF (socket.SOCKET = 0) THEN
    socket(EN:=1, TYP:=SOCK_DGRAM, PROTO:=IPPROTO_UDP, PORT:=4545);
END_IF
Read(EN:=1, SOCKET:=socket.SOCKET, DATA:=buffer);
Read(EN:=0, DATA:=buffer);
IF (Read.LEN_OUT > 0) THEN
    (* Do somthing *)
END_IF

    The socket is successfully created with no error, but when a packet comes nothing is read from the ETHERNET_READ function block...

    Why? Does anybody know if I've done something wrong?

    Thank

    Raoul

     

  • Erik Böhm - 2006-07-24

    Hi

    Did you try it like this:

    Read(EN:=1, SOCKET:=socket.SOCKET, DATA:=buffer);

    IF (Read.LEN_OUT > 0) THEN 

    Read(EN:=0, DATA:=buffer);

(* Do somthing *)

    END_IF

     

  • raoul - 2006-07-24

    Yes I tried that, but It's exactly the same...

    Raoul

     

  • Erik Böhm - 2006-07-24

    Hi

    I have a (fully working and tested) Sample for you.

    Maybe it helps you to understand the mechanism.

    Greets

    Erik

    WagoEthernetServer.zip [12.42 KiB]

     

  • raoul - 2006-07-24

    Thank you, I'll try this example...

    Raoul

     

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