TimeOut for CP243

[Nobody/Anonymous]

Hi, fantastic DLL i think your project is very interesting, i've implemented your dll for a few kind of comunication, S7-200 PPI via PPI Cable, and S7-200 Ethernet via CP243 but i've a problem, with the protocol ethernet for CP243 the timeout for the communication doesn't work, to reply a command the DLL wait a time near a 20/30 second, you have a soluction for this kind of problem ? with a serial i don't have any problem beacause i can change the value for the timeout, but in the ethernet isn't possibile.

Thanks for you reply

[Nobody/Anonymous]

Yes, I have found this bug some time ago too.

You have to modify the function setTimeOut() in nodave.c:
(Not a really clean solaution, but it works for me)

void setTimeOut(daveInterface * di, int tmo) {
    COMMTIMEOUTS cto;
    int to = tmo/1000;
#ifdef DEBUG_CALLS
    LOG3("%s setTimeOut time:%d)\n",di->name ,tmo);
    FLUSH;
#endif
    switch(di->protocol) {
    case daveProtoISOTCP:        /* ISO over TCP */
    case daveProtoISOTCP243:    /* ISO over TCP with CP243 */
    case daveProtoISOTCPR:        /* ISO over TCP with Routing */
    case daveProtoMPI_IBH:        /* MPI with IBH NetLink MPI to ethernet gateway */
    case daveProtoPPI_IBH:        /* PPI with IBH NetLink PPI to ethernet gateway */
    case daveProtoNLpro:        /* MPI with NetLink Pro MPI to ethernet gateway */
        setsockopt(di->fd.rfd, SOL_SOCKET, SO_RCVTIMEO, (char *)&to, sizeof(to));
        break;

    default:
        GetCommTimeouts(di->fd.rfd, &cto);
        cto.ReadIntervalTimeout=0;
        cto.ReadTotalTimeoutMultiplier=0;
        cto.ReadTotalTimeoutConstant=tmo/1000;
        SetCommTimeouts(di->fd.rfd,&cto);
        break;
    }
}
#endif

[Nobody/Anonymous]

Thanks for you answer, but i have another question..

The command:

setsockopt(di->fd.rfd, SOL_SOCKET, SO_RCVTIMEO, (char *)&to, sizeof(to));

i must write only in the case

daveProtoNLpro:

or i must copy it in daveProtoISOTCP243 too ?

Because the execution, go to the daveProtoISOTCP243 case and not in daveProtoNLpro?

Thanks