Experimental Physics and
Industrial Control System

Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov> · Mon, 2 Jan 2023 12:37:33 -0800

On 12/28/22 03:47, Zimoch Dirk via Tech-talk wrote:

At the moment, that is not possible. I had planned for quite some time to implement that.

... But I don‘t know what the core developers think of this.

Aliasing fields seem like a reasonable feature.  Although it isn't yet clear
to me how this would work in detail.  eg. to take an example from below.

alias("det1.NELM", "det1:NELM")

What would "caget det1:NELM.RTYP" return?

There may also be complications depending on what changes to the
'struct dbBase' tree would be needed.

Dirk

Am 20.12.2022 um 19:50 schrieb Li, Ji via Tech-talk <tech-talk at aps.anl.gov>:

Hi,

I'm trying to access record fields as PVs using alias command, such as:

alias("det1.NELM", "det1:NELM")
alias("det1.TSEN", "det1:TSEN")

The IOC didn't report errors, but apparently they all pointed to det1 as the change to det1 appeared on these aliases, and vice versa, and this was proved by dbla.

If alias command is not the right choice, are there any ways to create aliases/dummy PVs for fields?

Best,
-Ji Li

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System