From: Matej S. <mat...@co...> - 2011-09-05 11:17:03
|
Marty is very good at documenting: http://epics-pvdata.cvs.sourceforge.net/viewvc/epics-pvdata/pvAccess/src/org/epics/ca/client/package.html?revision=1.2&content-type=text%2Fplain#PVStructur > All the requests have this PVField pvRequest. It describes what fields > (and in what order) you want to get back. > In addition can also hold additional options (e.g. queueSize for > monitors, do you want to process before/after get/put, etc.) > . > You know each channel "is" a structure that contains fields you are > not interested in. > So, when you connect to a channel you (usually) want to get only a > subset back, e.g. "value, timeStamp, alarm". > You put this data in the PVField pvRequest. Protocol does not care > about it (does no processing on it), but it is needed > for backend. > > Matej > |