Re: EPICS question: upper/lower voltage check

[Marty Kraimer <mrk@aps.anl.gov>]

"Johann M. Heuser" wrote:

> I know already that EPICS database fields HOPR and LOPR should be used to
> check the demanded voltages for upper/lower boundaries. However, it appears
> to me that in our high voltage record there are no such fields yet. They
> are not listed when I print records on the crate controller.
> I append the definition file of the high voltage record that we are using
> to this message.

HOPR,LOPR just happen to be the fields normally used for display limits and
DRVH,DRVL the fields for control limits. This convention is followed by most if
not all record types supplied with base but it is just a convention.

It is the record support module that implements limits. In particular the record
support routines get_graphic_double, get_control_double, get_alarm_double.

Thus to solve your problem your high voltage record support module must
implement at least get_graphic_double.

See "Chapter 8: Record Support" of the Application developer's Guide for
details.

Marty Kraimer