Areadetector Plugin Enable/Disable Issue and Design Question

["Blomley, Edmund \(IBPT\) via Tech-talk" <tech-talk at aps.anl.gov>]

Hey all,

I am fairly new to using most of the areadetector plugins and I encountered
one issue which seems rather confusing to me with the various Enable/Disable
fields:

If the setpoint (*:Proc1:EnableCallbacks) is changed to 1, the readback
value (*:Proc1:EnableCallbacks_RBV) changes to 0.
If the setpoint is changed to 0, the readback value changes to 1. But the
process plugin actually seems to do its job if the _RBV is labled as
"Disable"
Similar story for the "Enable background" and its readback value. StdArrays
and Stats behave the same way.
But for my ROI plugin set and readback for the enable field are consistent.

So I kind of wonder if I somehow messed up my plugin configuration, which
brings me to the second question regarding plugin interaction/design:

I am trying this setup: Camera -> raw picture (StdArray) -> process plugin
(+ FileTiff Plugin) -> processed image -> ROI plugin -> stats plugin ->
FileHDF plugin
With the basic idea: optional background substraction feeding into optional
ROI feeding into stats and file saving. Is this a "good" plugin design?

-----------------------
st.cmd setup:

[typical st.cmd header]
...
[autosave config]

epicsEnvSet("MODEL", "acA1920-25gm")
epicsEnvSet("ELEMENTS", "2073600")
epicsEnvSet("XSIZE", "1920")
epicsEnvSet("YSIZE", "1080")

aravisConfig("basler1", "Basler-$(MODEL)-$(SERIAL)", 1, -1, 0, 0)

# Load default templates
dbLoadRecords("$(ADARAVIS)/db/aravisCamera.template",
"P=$(PREFIX),R=,PORT=basler1,ADDR=0,TIMEOUT=1")
dbLoadRecords("db/Basler_$(MODEL).template",
"P=$(PREFIX),R=,PORT=basler1,ADDR=0,TIMEOUT=1")

# Raw Camera Image
NDStdArraysConfigure("CA1", 5, 0, "basler1", 0, 0)
dbLoadRecords("$(ADCORE)/db/NDStdArrays.template",
"P=$(PREFIX),R=Image:,PORT=CA1,ADDR=0,TIMEOUT=1,NDARRAY_PORT=basler1,TYPE=In
t16,FTVL=SHORT,NELEMENTS=$(ELEMENTS),ENABLED=1")

# Processing plugin
NDProcessConfigure("PROC1", $(QSIZE=5), 0, "basler1", 0, 0, 0)
dbLoadRecords("$(ADCORE)/db/NDProcess.template", "P=$(PREFIX),R=Proc1:,
PORT=PROC1,ADDR=0,TIMEOUT=1,NDARRAY_PORT=basler1")
# TIFF file plugin for background
NDFileTIFFConfigure("FileTIFF1", $(QSIZE=5), 0, "basler1", 0)
dbLoadRecords("$(ADCORE)/db/NDFileTIFF.template",
"P=$(PREFIX),R=Proc1:TIFF:,PORT=FileTIFF1,ADDR=0,TIMEOUT=1,NDARRAY_PORT=basl
er1")

# Camera Image After Processing
NDStdArraysConfigure("POST1", 5, 0, "PROC1", 0, 0)
dbLoadRecords("$(ADCORE)/db/NDStdArrays.template",
"P=$(PREFIX),R=ImageProcessed:,PORT=POST1,ADDR=0,TIMEOUT=1,NDARRAY_PORT=PROC
1,TYPE=Int16,FTVL=SHORT,NELEMENTS=$(ELEMENTS),ENABLED=1")

# Region of Interest Plugin
NDROIConfigure("ROI1", $(QSIZE=5), 0, "PROC1", 0, 0, 0, 0, 0,
$(MAX_THREADS=5))
dbLoadRecords("$(ADCORE)/db/NDROI.template", "P=$(PREFIX),R=ROI1:,
PORT=ROI1,ADDR=0,TIMEOUT=1,NDARRAY_PORT=PROC1")

# Statistics plugin on processed image
NDStatsConfigure("STATS1", $(QSIZE=5), 0, "PROC1",    0, 0, 0, 0, 0,
$(MAX_THREADS=5))
dbLoadRecords("NDStats.template",     "P=$(PREFIX),R=Stats1:,
PORT=STATS1,ADDR=0,TIMEOUT=1,HIST_SIZE=256,XSIZE=$(XSIZE),YSIZE=$(YSIZE),NCH
ANS=$(NCHANS=100),NDARRAY_PORT=PROC1")
NDTimeSeriesConfigure("STATS1_TS", $(QSIZE=5), 0, "STATS1", 1, 23)
dbLoadRecords("$(ADCORE)/db/NDTimeSeries.template",
"P=$(PREFIX),R=Stats1:TS:,
PORT=STATS1_TS,ADDR=0,TIMEOUT=1,NDARRAY_PORT=STATS1,NDARRAY_ADDR=1,NCHANS=$(
NCHANS=100),ENABLED=1")


[more plugins]
...
[ioc init]

Cheers
eddy

Attachment: smime.p7s
Description: S/MIME cryptographic signature