I have a CompactLogix system with 4 Powerflex 755 drives and one PanelView. The drives work (start/stop, speed reference via Ethernet), but fault randomly every 30-120 seconds with a fault 4037 (actually port 4, fault 37, I think) Net I/O Timeout fault. Fault always clears immediately. No problems with the Panelview. Talked to tech support who said it was a network problem and suggested downloading Wireshark, which I did. I've run it, but not sure what to look for.
I've disconnected the PanelView and programming computer, but still have the faults.
Network Setup (processor and drives have autonegotiate off, set to 100/full duplex) (all devices have mask 255.255.0.0, gateway 10.91.1.1
10.91.2.5, Processor, 5069-L32ER, firmware 30, using port 2, port 1 is set to DHCP and not connected to anything
10.91.251.5, Switch, N-tron 708TX, IGMP snoping enabled,
10.91.101.5, VFD1, PowerFlex 755 with ENETR card, IP set by parameters
10.91.102.5, VFD2, PowerFlex 755 with ENETR card, IP set by parameters
10.91.103.5, VFD3, PowerFlex 755 with ENETR card, IP set by parameters
10.91.104.5, VFD1, PowerFlex 755 with ENETR card, IP set by parameters
10.91.10.5, PanelView, 2711P-T10C22DP
I've done about 10 similar projects with 4-10 drives and haven't had this problem. This is the first for this particular processor and using version 30. Panel is at the panel shop for testing with no motors attached.
Thanks in advance for any ideas.