Experimental Physics and
Industrial Control System

Till Straumann <[email protected]> · Tue, 27 Mar 2007 12:14:16 -0700

Are you sure processing really occurs?
Note that DISA does *not* disable changes
to record fields but only record processing
that might be the consequence of a field change.
Hence, even if DISA==DISV==1 you
still might be able to modify the  field associated
with your  'gain'  (and if I read the code right
you'll even post monitors to the field change)
but no record processing will occur (i.e., the
change would not be written out to a device
support module attached to the record)
Use DISP to disallow changes of record fields.
HTH
-- Till
Dayle Kotturi wrote:

Hello,
I am using SNL to manage the operational mode of a phase and amplitude ctrllr.
Mode is either CALIBRATING or RUNNING.
When RUNNING, I attempt to disallow changes to gain setting via entry{}
clause of state RUNNING where I set DISA to 1 for the gain PV.
I can see DISA field is set correctly to 1 via dbpr.
On the EDM GUI, however, I am still able to change the gain.
The gain is a longout record.
From the doc, I understand that when DISA==DISV==1, processing should
not occur. Why does it?
It is EPICS R3.14.8.2.
Dayle Kotturi                                            [email protected]
LINAC Coherent Light Source                             office 650-926-4923
Stanford Linear Accelerator Center                         fax 650-926-4778

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System