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<== Date ==> <== Thread ==>
Subject: Re: Creating calc record in Python softioc
From: Paul Nord via Tech-talk <tech-talk at aps.anl.gov>
To: "Johnson, Andrew N." <anj at anl.gov>
Cc: EPICS tech-talk <tech-talk at aps.anl.gov>
Date: Fri, 5 Feb 2021 13:39:17 -0600
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.

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Re: Creating calc record in Python softioc Johnson, Andrew N. via Tech-talk
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Creating calc record in Python softioc Paul Nord via Tech-talk
Re: Creating calc record in Python softioc Johnson, Andrew N. via Tech-talk
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