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<== Date ==> <== Thread ==>
Subject: Re: mbbo with 32 choices
From: Andrew Johnson via Tech-talk <tech-talk at aps.anl.gov>
To: "Le, An" <anle at slac.stanford.edu>, "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Date: Fri, 21 Apr 2023 13:30:46 -0500
What kind of client are you wanting to use to control this channel? The Channel Access protocol only supports 16 choices for menu/enum fields.

The IOC internals and QSRV (PVAccess) should be able to handle up to 30 choices at the moment (DB_MAX_CHOICES in dbDefs.h) but I'm not aware how much if any testing has happened beyond 16 — the dbCommon STAT field does have more than 16 possible states though, so if your client can see the WRITE_ACCESS choice of a .STAT field it may work.

- Andrew


On 4/21/23 12:41 PM, Le, An via Tech-talk wrote:

Hello,

 

I’m looking for an mbbo-like record type that supports 32 choices instead of 16. Has anyone already written an implementation for this?

 

Thanks,

An Le

SLAC National Accelerator Laboratory

 


-- 
Complexity comes for free, Simplicity you have to work for.
References:
mbbo with 32 choices Le, An via Tech-talk
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