Experimental Physics and
Industrial Control System

John Dobbins <[email protected]> · Sun, 11 Apr 2010 20:06:12 -0400

All,
I have a puzzle that I'm not sure where to begin with. I've written
device support for Opto22 remote I/O based on Opto22 provided libraries.
I have been using it for a few years without trouble until the other day
I set PINI = 1 on an output record. It turns out I haven't needed to do
this before. The the record got stuck in a funny state with UDF = 1, if
I subsequently write to the record the new value appears there but not
in hardware. Also, these output records do a read from remote hardware
during record init so I'm surprised that I should have a problem later,
i.e. during initialProcess(). If PINI is not set I can write to the
record and hardware without problem. Any ideas where to begin?
Thanks,
John Dobbins
Cornell Laboratory for Accelerator-based Science and Education

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System