Receive UDP package from broadcast

2021-03-03T10:41:58.293000Z

Right after "Receive.xReady = TRUE", you should set "Receive(xEnable := FALSE)" to get next package.

Receive UDP package from broadcast

2020-09-29T06:18:27.906000Z

sure it should be 255.255.255.255 and not 255.255.255.0

With 255.255.255.255 you have limited broadcast

Receive UDP package from broadcast

2020-09-28T11:53:50.340000Z

Hello
I have some problems to get my test code to work to receive UDP packages.
I have a broadcaster that sends UDP packages on 192.168.15.X
But I can't get the code to receive the packages.
When I use a test server on my pc like packet sender and I send UDP directly to my plc then I receive the packages.
But also here when I broadcast from the pc and send to 255.255.255.255 I don't the packages
My controller has the IP address 192.168.15.67
Hope someone can help me out what is wront

VAR_GLOBAL
    gc_IP_SendTo : NBS.IP_ADDR := (sAddr := '192.168.15.67'); // My PLC's Ip address
    gc_uiPort : UINT := 10110; 
END_VAR

PROGRAM POU
VAR
    Peer : nbs.UDP_Peer;
    Send : nbs.UDP_Send;
    Receive : nbs.UDP_Receive;
    xFirstPacket : BOOL;
    xOldActive : BOOL;
    udpData : UDPData;
END_VAR

Peer(xEnable := TRUE, ipAddr := gc_IP_SendTo, uiPort := gc_uiPort);
IF Peer.xActive AND NOT xOldActive THEN
    xFirstPacket := TRUE;
END_IF
xOldActive := Peer.xActive;

Receive(xEnable := Peer.xActive, hPeer := Peer.hPeer, szSize := SIZEOF(udpData), pData := ADR(udpData));
IF (Receive.xReady AND Receive.szSize = SIZEOF(udpData)) OR xFirstPacket THEN
    xFirstPacket := FALSE;
END_IF

IF Peer.xError THEN //Connection closed
    Peer (xEnable := FALSE);
    Send(xExecute := FALSE);
    Receive(xEnable := FALSE);
END_IF

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