Experimental Physics and
Industrial Control System

Tim Mooney <[email protected]> · Tue, 06 Jul 2004 13:54:18 -0500

Ned Arnold wrote:
The latest version of save/restore (the ioc-based utility that
initializes field values from a file prior to iocInit) supports
waveforms. One could use any CA utility (matlab?) to initialize a
waveform record ONCE and then the value would be restored after each
reboot.
This was added last spring. Contact Tim Mooney ([email protected]) for
details.
 Ned

A 3.13-compatible version (R3-5) of this software is available
for download at
www.aps.anl.gov/aod/bcda/synApps/autosave/autosave.html
The 3.14 version will be out tomorrow, probably.
You can initialize waveform PV's with save/restore even if you don't
intend to save changes to those PV's.  The following text file will
initialize the first ten elements of the array 'xxx:myArray.VAL',
and six elements of the array 'xxx:myOtherArray.VAL'.
(You can initialize thousands of elements in this way, but you probably
don't want to see it in an email message.)  The parser isn't very smart,
so make sure you include all the spaces and quotes, and don't stick a
line feed in the middle of an element unless you *like* fireworks.
---snip---
# save/restore V3.5	Automatically generated - DO NOT MODIFY - 040412-153501
xxx:myArray.VAL @array@ { "0" "1" "2" "3" "4" "5"
"6" "7.3" "8.5"
"154.345" }
xxx:myOtherArray.VAL @array@ { "abc " "de\"f" "ghi\"" "jkl" "m" "n" }
<END>
---snip---
The first and last lines must be exactly as shown (<END> is followed by a
single control character, normally '\n'), except that the date at the end
of the first line doesn't matter.
To get save/restore to use the text file (named, say, 'myArrays.sav'), add
the following line to st.cmd, before the call to iocInit():
 set_pass1_restoreFile("myArrays.sav")
Note that you have to restore arrays in pass 1 (the second of two passes
save/restore makes during iocInit), because database access isn't callable
when the pass-0 restore occurs.  This means that the restored values will
not be available during record or device initialization, nor will they be
available to records processed by PINI="Yes".
You can also restore at run time, as described in the README file
(search for "fdbrestore").
--
Tim Mooney ([email protected]; 630-252-5417)
Advanced Photon Source
APS Operations Division
Beamline Controls & Data Acquisition Group

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System