Experimental Physics and
Industrial Control System

Mathias Steiner <[email protected]> · Tue, 27 Dec 2005 15:44:37 -0500

Learned Friends,
I have a question regarding software design: How does everyone solve
the problem of sequence in EPICS?
I ran afoul of this some years ago, when I wrote code to set a group of
power supplies along a beamline; FIRST, the EPICS channel representing
magnetic rigidity would be set, THEN the magnets were told to go set
themselves to that rigidity.
Needless to say, half the magnets started setting themselves to the
previous rigidity, because in the world of ethernet, there is no such
thing as "do-this-then-do-that".
I found a workaround that is effective but inelegant, and I was
wondering if there was an accepted way of handling this issue.
Thanks in advance,
  Mathias
Mathias Steiner
NSCL/Cyclotron Lab
Michigan State University

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System