Experimental Physics and Industrial Control System
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Michael, we are talking about fields here. So “det1:NELM.RTYP” itself is not valid.
From:
Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>
Date: Monday, January 2, 2023 at 3:37 PM
To: Zimoch Dirk <dirk.zimoch at psi.ch>
Cc: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Re: Possible to create aliases for record fields?
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
>>
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ANJ, 02 Jan 2023 |
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