Experimental Physics and
Industrial Control System

Von: "Zimoch Dirk (PSI)" <dirk.zimoch at psi.ch>
Datum: 12. November 2021 um 11:29:00 MEZ
An: Donny Domagoj Cosic <Donny.Domagoj.Cosic at irb.hr>
Kopie: Tech-talk <tech-talk-bounces at aps.anl.gov>
Betreff: AW: StreamDevice Format Converters

You get the number as a 0 padded decimal integer. Thus use %d. The value 245 will end up un RVAL. Let the ai convert the value for you to 2.45 by setting ESLO to 0.01. Set LINR to LINEAR or SLOPE.

The %= format is meant to check if a readback contains the expected value. It can appear in an 'in' command but behaves like an output format. What it does is: Did I read the same string I would get if I printed the current value with this format? It does not set anything in the record but may cause a parse error if the string does not match the expectation. Useful in output records when the device sends back the written value and you want to check if the device understood the correct thing.

-----Ursprüngliche Nachricht-----

Von: Tech-talk <tech-talk-bounces at aps.anl.gov> Im Auftrag von

Donny Domagoj Cosic via Tech-talk

Gesendet: Freitag, 12. November 2021 11:18

An: Ralph Lange via Tech-talk <tech-talk at aps.anl.gov>

Betreff: StreamDevice Format Converters

Hi,

I receive a string from a device containing the current draw as a 6

character number. ie. for 2.45 A, the string would be 000245. Using the

format converter %6f in the proto file, I am able to read the value into

a ai record as 245. However when I try to convert the input string using

%=6.2f, I always read in 0 as the current.

Am I understanding the = operator properly? How can I convert the string

000245 input into 2.45 in the ai record?

Thank you in advance,

--

Donny Domagoj Cosic

Laboratory for Ion Beam Interactions

Ruđer Bošković Institute

Bijenička cesta 54 | HR-10 000 Zagreb | CROATIA

T: +385 1 4561 041 | @: dcosic at irb.hr | www.irb.hr