Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Thu, 1 Oct 2015 15:07:42 +0200

Hi Mark,

The processRrrr() routines of the ASYN Device support for input records

always set the VAL (or RVAL) field and return success, even if the call

to queueRequest() acquiring the value fails.

In our case, with a non-blocking ASYN driver for a PXIe board, the RVAL

field of the mbbi record showing the board status is always set to 0 (=

"OK"), even when there is no such board present and the device never

connects.

We are pre-setting the database with 4 = "no board", but that gets

overwritten with 0 ="OK" at every processing.

That doesn't seem right, does it?

Shouldn't the process routine leave the value unchanged and return an

error when reading fails?

Thanks a lot,
~Ralph

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System