Re: Strangeness in ai/mbbiDirect with StreamDevice on PINI

[Ralph Lange via Tech-talk <tech-talk at aps.anl.gov>]

On Mon, 26 Jun 2023 at 23:02, Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov> wrote:

I suspect what you are seeing results from the asyn port not being
connected at the time of the IOC's initial scan.

Firstly, the name "StatusRegister" suggests to me that this value
should be read more than once on IOC startup.

imo. for robust operation some care should be taken anytime when
IOC and device don't share a power switch.

I try to avoid PINI with such devices, and instead use SCAN="10 second"
as a starting point for values which change slowly or only on device
power cycle.

If you haven't already, also check the StreamDevice documentation of the @init exception handler. https://paulscherrerinstitute.github.io/StreamDevice/processing.html#init

Cheers,
~Ralph