Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Fri, 15 Oct 2010 10:32:18 -0400

 Hi Bernd,
your assumptions are correct. Input links to asynchronous records get
the value from the first processing and do not wait for the completion
phase of the asynchronuous device support.

This "feature" has been discussed a few times, but is still there.
The easiest way to get around it, as you wrote: Forward link from the
asynchronous record to the data receiving record.
We will try to resolve this issue in 3.15 - sorry!
Ralph

On 15-Oct-2010 10:23, Schoeneburg, Bernd wrote:

Hello,

I have an asynchronous device support, which sometimes acts
synchronously, if the access to an I/O card is possible without delay.
If not, a callback is used for the record completion.
In the database a record is running scanned periodically having an
INLINK with PP set. It gets data from a bi-record wich has the
mentioned device support. It seems to me that sometimes the data is
not "new". Does the scanned record complete before the asynchronous IO
of the bi record arrives?
If that is true - is the only possibility to solve the problem setting
the bi record into "scan" and use a FLNK to the previously scanned
record?
Epics R 3.14.11
-Bernd

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System