Experimental Physics and
Industrial Control System

"Hartman, Steven M." <[email protected]> · Thu, 21 Nov 2013 20:43:29 -0500

See this thread I started back in 2007 which should answer some of your questions …

http://www.aps.anl.gov/epics/tech-talk/2007/msg00834.php

-- 
Steven Hartman
[email protected]

 -----Original Message-----
From: 	Emmanuel Mayssat [mailto:[email protected]]
Sent:	Thursday, November 21, 2013 07:32 PM Eastern Standard Time
To:	[email protected]
Subject:	Why should I care about breakpoint table monotonicity?

Hello all,

I am currently playing with ai and ao records breakpoint tables.
Documentation is rather sparse on how to implement them.
http://www.aps.anl.gov/epics/EpicsDocumentation/AppDevManuals/RecordRef/Recordref-5.html#MARKER-9-12 

I found a couple of interesting emails on the tech-talk mailing list.
Including:
http://www.aps.anl.gov/epics/tech-talk/2010/msg02152.php 
(Thank you Stephanie!)

and another
http://www.aps.anl.gov/epics/tech-talk/2010/msg01896.php 
"This is a bit of a pain, so I just wrote a blueprint to look at adding the table names to menuConvert automatically in future releases. - Andrew"
Has this been implemented in >3.14.11 ?

But my real question is this: why should I care about the monotonicity of the data in the breakpoint table?
Apparently, I have to set a iocsh variable to 1
"var dbBptNotMonotonic 1"
How does this impact monotonic tables?
Why not always set it to 1?
Why do I need to set it?

(I can only imagine that it has to do with RVAL to VAL conversion .... and VAL to RVAL conversion which may return more than one value.)

Thanks,
--
Emmanuel

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System