Network Nodes Not Visible and Showing Mac Checksum Error


Thread Starter


We have a ring MB300 network for our plant, which connects 4 PLCs ABB 450 using a repeater in between. Since the last few days, one part of the system was not able to communicate with the other. It's a MB300 bus & TCP/IP for each operator station. We have checked the end terminators & found resistance ok. We reset all PLCs but still the system is the same. All transceivers were also replaced but no improvement. Also OS is displaying MAC checksum error. Kindly help.
MAC checksum errors almost always mean you have a hardware problem. (But I guess you already know that right). See my other reply to a similar problem today

Good luck