Experimental Physics and Industrial Control System
> From [email protected] (Nick Rees)
>...
> I have been using R3.13.0 alpha 5 for a while now, and even had
> occasion to use the switchable links. What we appear to need now is a
> switch record, and probably a multipole, multiway switch record.
> ...
> Anyway, has anyone thought about something along these lines? Has anyone
> got anything to add?
A switch record would be a convenient mechanism for connecting
predetermined sets of inputs and outputs (but that was already possible
in 3.12). I think we also need simple improvements in existing records
to take better advantage of 3.13 links. If the existing Select and
Sequence records could handle strings, they'd be a lot more useful in
databases to support link manipulation, and they'd give you the raw
materials from which you could build a multiway, multipole switch.
Even better, I think, would be a string-manipulation record: suppose I
need to connect some calculations to any of, say, 50 motors. I'd want
to poke to the drive field "motorX.VAL", read from the readback field
"motorX.RBV", and monitor the done-moving field "motorX.DMOV". I'd
like to let the user type in, say, "motor38", and have a database that
would make all three connections. To do this, I'd need to write a
string-manipulation record, but I'd like to use standard EPICS records
to distribute the resulting PV names.
Tim
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