Re: MAXv problem

[Ron Sluiter <sluiter@aps.anl.gov>]

Hello Michael,

This is a known, ill defined, problem.  It appears to be a rare,
intermittent, hardware issue.

At least one MAXv board, with the same symptoms you describe,
has been returned to OMS that I know of.  I believe OMS is
beginning to understand what is causing this problem.

I would RMA the board back to OMS and tell them you are
having watchdog problems.  Have them contact me if they
have any further questions.

Ron

Davidsaver, Michael wrote:
> All,
>
> We are seeing a problem with one MAXv motor controller in a crate with 6
> controllers running the version 6.4.3 of the motor support with Base
> 3.14.10 on RTEMS 4.9.3.  The symptoms I see are that the IOC becomes
> unresponsive.  After a soft reboot of the CPU I see the following on the
> console
>
> MAXv card #3 is NOT running; status = 0x2
>
> This message is printing the firmware state register, which is
> indicating that the processor on the maxv card is still
> (re)initializing.
>
> The IOC then hangs waiting for a reply from the card in motor_init.  I
> can attach with a remote debugger and see that it is stuck in a loop
> waiting for the card to update a register.  A full power cycle seems to
> bring the card back to life, but the problem has recurred several times
> in recent weeks.
>
> Is this a known issue with a fix?  We do have a spare, so I am inclined
> just to return this one to the manufacturer.
>
>
> Michael Davidsaver
> NSLSII Controls Group
> Brookhaven National Lab
> (631)344-3698
>
>
>