Re: Creating calc record in Python softioc

[Paul Nord via Tech-talk <tech-talk at aps.anl.gov>]

Andrew,

That loads without error.  But the calculation doesn't actually work.

#!/usr/local/epics/modules/pythonIoc/pythonIoc

from softioc import softioc, builder

builder.SetDeviceName('XX')

rec = builder.aIn('VALUE',VAL=3)

calc = builder.records.calc('CALC', CALC = 'A*B', INPA = rec, B = 42)

rec.FLNK = builder.PP(calc)

#run the ioc

builder.LoadDatabase()

softioc.iocInit()

#start the ioc shell

softioc.interactive_ioc(globals())

===========

$ caput "XX:VALUE" 7

Old : XX:VALUE                       3

New : XX:VALUE                       7

$ caget "XX:CALC"

XX:CALC                        0

===========

>> dbpr("XX:CALC")

A: 0                ASG:                B: 42               C: 0                

CALC: A*B           D: 0                DESC:               DISA: 0            

DISP: 0             DISV: 1             E: 0                F: 0                

G: 0                H: 0                I: 0                J: 0                

K: 0                L: 0                NAME: XX:CALC       SEVR: INVALID      

STAT: UDF           TPRO: 0             VAL: 0    

On Fri, Feb 5, 2021 at 1:27 PM Johnson, Andrew N. <anj at anl.gov> wrote:

Hi Paul,

On Feb 5, 2021, at 12:23 PM, Paul Nord via Tech-talk <tech-talk at aps.anl.gov> wrote:

According to the documentation, this should work:

#!/usr/local/epics/modules/pythonIoc/pythonIoc
from softioc import softioc, builder
builder.SetDeviceName('XX')
rec = builder.aIn('VALUE')
calc = builder.records.calc('CALC', CALC = 'A*B', A = rec, B = 42)
rec.FLNK = builder.PP(calc)

I’ve never used the Python softIoc, but given this error message

AssertionError: Can't write "XX:VALUE" to field A: not a number

have you tried this instead?

calc = builder.records.calc('CALC', CALC = 'A*B', INPA = rec, B = 42)

- Andrew

-- 

Complexity comes for free, simplicity you have to work for.