davidg68124
Member
I work for a pharma on contract right now and we had a major event over the weekend. We had several ControlLogix ENBT cards of various revision levels (1.4 to 3.3) and a few CompactLogix at R13 fail on their ethernet communications. We seemed to have a cascading failure effect over 29 hours where each one failed at different times. This forced the on duty tech to cycle power by removing the cards and actually power cyclying the CompactLogix. The link lights were solid red and there were no comms on Ethernet. The ENBT had cycling on their Displays EXCP 300. I have called rockwell and discussed this with them and they say unsoliced messages caused the message buffers to overrun. They are suggesting a firmware upgrade but one of the other engineers here on site is resisting this as he found a code listing that list FAIL 300 as an invalid ARP Command.
I will add that on thursday, we had some DHCP issues. WIT believes a rogue DHCP server was added on our local network. They were using an automated process that was using ARP commands trying to locate the problem. WE are leaning this way as well.
The tech at the time did not have the capability to go online with the units through serial to get an idea what the properties of the cards and ports were telling him.
This event cost us 9 hours of data, so we are having issues with releasing the batch.
What I am asking is, have any of you run into something like this? If so, what were your resolutions for it.
I am wondering if I can use system variables to reset the card and bring it out of a fault like this or will I still need to cycle power.
Thanks in advance,
David R. Gulick
I will add that on thursday, we had some DHCP issues. WIT believes a rogue DHCP server was added on our local network. They were using an automated process that was using ARP commands trying to locate the problem. WE are leaning this way as well.
The tech at the time did not have the capability to go online with the units through serial to get an idea what the properties of the cards and ports were telling him.
This event cost us 9 hours of data, so we are having issues with releasing the batch.
What I am asking is, have any of you run into something like this? If so, what were your resolutions for it.
I am wondering if I can use system variables to reset the card and bring it out of a fault like this or will I still need to cycle power.
Thanks in advance,
David R. Gulick