Experimental Physics and
Industrial Control System

"Ronald L. Sluiter" <[email protected]> · Thu, 08 Mar 2007 13:23:20 -0600

 OMS MAXv users,
Kurt Goetze and I discovered a design problem with the OMS MAXv motion

control board . The problem is that the MAXv board fails to initialize
correctly

after reset or power-cycling approx. 15% of the time. OMS explains,
The FPGA that controlled VME communications of the MAXv controller was

not consistently reset on initialization. The modification guarantees
that this

FPGA is consistently reset on all initializations including power-up
and SYSRESET.

Of course, the greater the number of MAXv boards in a given IOC, the greater
the chance that one of them will not initialize correctly.
OMS has fixed the problem.  MAXv boards with FPGA code version A6 and
above are fixed.  Users with FPGA code version A5 and below should obtain
a RMA from OMS and request Engineering Change Order (ECO) #1432.
There is no charge for the upgrade.
You can determine the FPGA code version of your MAXv boards by issuing the
following command at the IOC shell (note the "FPGA:B1:A6" section);
epics> dbior "drvMAXv"

Driver: drvMAXv

Oms MAXv motor card #0 @ 0xFFFFF000, id: MAXv-8000 ver:1.29,
s/n:000122, FPGA:B1:A6 BOOT:1.1 - Oregon Micro Systems
epics>

Until all the MAXv boards in a give IOC are "fixed", I recommend that you

use the above 'dbior "drvMAXv"' command after every reset and power-cycle

to determine if all the MAXv boards have initialized correctly. The MAXv

boards that did not initialize correctly will have the "... not found."
message.

Example below;
epics> dbior "drvMAXv"

Driver: drvMAXv

Oms MAXv motor card #0 not found.

Oms MAXv motor card #1 @ 0xFFFFF000, id: MAXv-8000 ver:1.29,
s/n:000122, FPGA:B1:A6 BOOT:1.1 - Oregon Micro Systems
value = 0 = 0x0

The only course of action is to keep rebooting until all the MAXv boards
in a given IOC initialize correctly.
Best regards,
Ron Sluiter

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System