Experimental Physics and Industrial Control System
Jeff,
While you're responding on this subject could you definitively answer
Micheal's original questions, which were:
> Firstly, is it possible for the element count of a channel to change while
> the channel is connected? I'm thinking in particular of the case when
> using camonitor (well, ok, I mean ca_create_subscription()) to monitor a
> waveform PV. Each event_handler callback is informed of the dbr count --
> but as far as I can tell, it's always the maximum waveform size, even if
> NORD is smaller.
> Is the fact that the update size doesn't change, ca_element_count() always
> reports the NELM, and subscribing with zero count gets the full wavelength,
> is this restriction fundamental to channel access, a limitation of the
> channel access server, or just something that hasn't been implemented in
> the waveform record? This question becomes more interesting as we use
> waveform records for large images!
Thanks,
- Andrew
--
The best FOSS code is written to be read by other humans -- Harald Welte
- Replies:
- Re: Channel access dynamic array subscription update element count Michael Abbott
- RE: Channel access dynamic array subscription update element count Jeff Hill
- javaIOC Marty Kraimer
- References:
- Channel access and ca_element_count michael.abbott
- RE: Channel access and ca_element_count Jeff Hill
- RE: Channel access dynamic array subscription update element count Jeff Hill
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