Experimental Physics and
Industrial Control System

Till Straumann <[email protected]> · Mon, 06 Nov 2006 10:08:53 -0800

Andrew Johnson wrote:

David Dudley wrote:

I've seen references to AAI and AAO records someplace, which I assume
are Array Analog Input and Output.  Is support for that put in the
device driver?

The aai and aao records are a bit of an anachronism; they're not
really used very much,

FYI. WE do use them at SSRL/SLAC.

there's no soft or test device support included in Base, and they're
not documented anywhere either.

The source is good enough.

 I think they were contributed by one site a long time ago, and we
just haven't got around to removing them yet (they'll be gone if R3.15
is ever released).

Has there been a discussion about this? We would be in quite a bit of
trouble if these are removed.
-- Till

I have a condition working with the Multilin control relays, where I
need to be able to generate a multiple register output sequence,
where the entire sequence is done in a single record. This would fit
that perfectly, I think.

Use a waveform record if you want device support where the whole array
comes from a CA client. However if you're going to want to be able to
set some individual elements from another record they you'll be much
better off writing device support that takes the higher level
parameters and combines them into the appropriate array/sequence
internally.
- Andrew

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System