msmiha

I've also been in contact with Omron and they are assuming that problem is with the switches. I'm using unmanaged types. Now we will replace them with managed type, and see if there will be any differences. Has anyone else got any experiences with switches? Which one do you prefer?

Currently I'm using EthernetIP connection so a default port is 44818. I can try to use normal Ethernet FINS/TCP or Ethernet UDP and then try to change ports. I will then report the results

Hi everyone! I have a problem with Omron PLCs CJ2M-CPU31, communicating to a SCADA CX-Supervisor v3.1 over EthernetIP. Actually I got 27 same PLCs connected to the EthernetIP network. The problem is that communication is working fine with 4-5 PLCs and sometimes even if I add 6 or 7 to the CX-Supervisor project. But when I add more and more PLCs, network becomes more and more overloaded (at least that’s what CX-Supervisor says). The response of SCADA is getting slow and it looks like it hangs. Now if I try to communicate with CX-Programmer the same time my SCADA is ruining slow, I can’t make a connection to the PLC or the connection is working really slowly. Has anyone ever had problems like me with Omron PLCs? Why does the communication start to run slowly? I’ve done some analyses with wireshark but the network is not nearly overloaded? There is no duplicated IP on the network. The PLCs are connected to the 8 port switches and those switches are then connected together (star and tree connection). Can anyone help please?