Hi, there. I was hoping someone has experience of embedded Siemens systems. What I've got are 19 IPCs running Step7 WinLC modules all tied togethe ron a nice little ethernet hub. I'm trying to make minor changes to the code on one M/C (the line controller) but I am unfamiliar with how this "PLC" gets info from the other 18, which are high speed robots. Up till now I have only set up comms on MPI between PLCs and used Profibus for instruments and drives. I am looking for SFCs, SFBs or common DBs but not much luck so far. The code is pretty damn big and although well commented it is commented in some kind of mad mnemonical(is that a word?) system known only to the originators. Hope someone has a few pointers, I've already crashed the LAN twice.