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Using Ethernet.lib

Forum: Codesys V2.3 🇬🇧

Created: 2006-07-21

Updated: 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
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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
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raoul - 2006-07-24

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

Raoul

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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]

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raoul - 2006-07-24

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

Raoul

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