FP-1600 Communication Errors

[Prashant]

I have three "banks" of modules, each "bank" consists of a FP-1600 ethernet module, followed by eight other i/o modules. Of the three "banks", the first bank seems to lose communciation after a couple hours. It transmits and receives more rapidly, upon startup, than the other two banks, then begins to deteriorate with a series of 7 status error flashes, and finally it experiences total loss of transmission to the module. Even though the devices are all powered communication is lost. I have upgraded the firmware to 411, I have isolated the ethernet cables (for EMI), and I have replaced more than two FP-1600 modules on this particular bank (using suggested values for connection to each module). The bank of modules, consists of the followi
ng I/O's in order.... AO-200, AO-200, AO-210, AO-200, AI-111, AI-110, AI-111, RLY-420. The relay terminals are connected to a number of solenoids. This bank is the only bank that I lose communication with. Is there any other suggestions, than what I have already done? These modules are all linked to the host via a switch.

[gbush]

Just got asked almost the identical question as this. I found that an individual module screwed up the whole system. i used FP Explorer and turned the monitoring on for each module. One of our modules wouldn't communicate. We swapped it out and were up and running. Before we sqapped it out, the lights on the module were only flashing one green, not the usual two green on "steady".