Experimental Physics and
Industrial Control System

Luedeke Andreas wrote:

Usability:
you will read back a current and a voltage from the power supply.
Is HOPR/LOPR the display range for the current or the voltage?
Of course you can have an IHOP/ILOP and VHOP/VLOP, but since there is just one function get_graphic_double, no standard display will be able to use those fields context sensitive.
The same applies to ADEL, MDEL, HIGH, HIHI, LOW, LOLO, ....

Actually, get_graphic_double gets a DBADDR* argument which references the field, not the record. Thus, it is possible to provide different values for different fields. But one has to do this. Many existing records already failed to implement this correctly (e.g. calc uses the same HOPR, LOPR, PREC, EGU for fields A,B,C,... as for VAL, motor uses the same PREC for ERES as for VAL, ...)

I agree with Andreas: Better not add another "generic" mega-record which at the end is more restrictive than generic. At least not until real object oriented inheritance is implemented for records.

We're thinking of going with generic records for motor control again
for similar reasons and to not use the motor record for our next
(current, upgrade from non-EPICS) project.
If you have a generic schema for all devices of the same sort you can
even treat the ones that need special treatment (in our case reading
in polynomial coefficients and calculating demand positions rather
than just passing them in from somewhere) with genSubs, and for the
ones that don't need special treatment have a 'straight through'
function.

Replies:

RE: Power Supply Record? Denison, PN (Peter)

References:

Power Supply Record? Susanna Jacobson

Re: Power Supply Record? Luedeke Andreas

Re: Power Supply Record? Dirk Zimoch

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