Experimental Physics and
Industrial Control System

Kevin Peterson via Tech-talk <tech-talk at aps.anl.gov> · Fri, 9 Dec 2022 13:56:56 -0600

I'm working with a device that returns multiple integer values in

response to queries. These values need to be scaled by 0.1 to have the

correct units.

The query function in the protocol file looks like this:

getLedIntensity {
  out "ip?";

 in

"%(\$1:LED1:intensity_RBV)u,%(\$1:LED2:intensity_RBV)u,%(\$1:LED3:intensity_RBV)u";

}

This is how the ai records are configured:

record(ai, "$(P)$(R):LED$(N):intensity_RBV") {
  field(DESC, "LED $(N) intensity RBV")
  field(PREC, "1")
  # The raw value is in tenths of a percent
  field(LINR, "NO CONVERSION")
  field(ASLO, "0.1")
  field(HOPR, "100.0")
  field(LOPR, "0.0")
}

When the intensities are queried, the ai records have VAL fields that

have not been scaled by the ASLO value.

Does the redirection-to-record feature of streamDevice circumvent the

RVAL conversion for ai records? If not, is there something obviously

wrong with this approach?

This support resides in an older IOC that is using base-3.15.6 and

StreamDevice 2-8-9.

Thanks ahead of time.

Kevin

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System