Following problem reported:
A redundant controller connect with 4 IO carrier. The controller is redundant but all IO cards are simplex. the IO card are in carrier as follows:
from slot 1 to 15: 8 channel DI
from slot 16 to 24: 8 channel DO
from slot 25 to 28 : 8 channel AI(HART)
slot 26 : 8 channel AO(HART)
from slot 30 to 32 : spare
Problem: Sometime the IO card in working time will isolate themselves from system.
The report for one time for this problem detailed as:
The IO cards of first slot of each carrir is isolated, cards red LED was ON, they couldn't be recognized in diagnostic and the related module has gone to MODBAD.
so the process disruppted and shutdown happened.
remedy: when the maintenance staff removed the card and inserted the card, system got back to normal and this card and all other cards worked as normal. green led go to ON and red LED gone to OFF and card have been recognized in diagnostic and relebant control modules.
Please help thsi matter by if:
1- Is therse any report like this?
2- What is the rason?
3- what have to do to prevent this problem?
4- Is there a software patch for this problem?
DeltaV Version: 8.4.1
Thanks.
Be part of solution, not part of problem
In reply to Maarten van der Waal:
Dear Maarten,
I don't think problem is in hardware, as the card removed and then inserted in slot problem is solved. It seems the card isolated itself from carrier by happening a problem inside the card or from outside. But I am wondering:
1- The card is simplex not redundant and if it was redundant, we could reasoning the card switchover-ed and faulty card go to isolated, but why in simplex form.
2- why all card in first slot of each carrier.
It may be a software type problem. But about contacting Emerson, still not.
thanks for your reply.
Well, the first step is to log this with the GSC and drive this to a resolution. You need to take a methodical approach to isolate the problem. This forum is not the right venue for this as many may offer you suggestions, and some could be unnecassarily distruptive.
It looks pretty clear that a carrier is affected, and this points to an issue on the select line for that carrier. It could be related to the hardware series of IO, so you need to evaluate your hardware, and possible known issues with that hardware. This is a GSC activity. Make the call.
Other than ensuring all your carriers are securely connected together, (nothing has vibrated appart possible causing intermittent contact) It is likely you have an issue wtih a Series 1 card and its rail bus connection circuitry. It could be a controller select line issue, but I doubt that. The GSC can research these issues and provide an action plan.
Andre Dicaire