update

beamlinetools/BEAMLINE_CONFIG/__init__.py

 from .base import *
 from .beamline import *
+from .derived_signals import *
 from .plans import *
 from .tools import *
 from .baseline import *

beamlinetools/BEAMLINE_CONFIG/beamline.py

@@ -76,9 +76,10 @@ div_det1 = DivideByArgs(mca.ch1.roi0.count, [mca.ch1.lifetime], name="div_det1")
 div_det2 = DivideByArgs(mca.ch1.roi0.count, [mca.ch1.lifetime, kth00.readback], name="div_det2")
 div_det2l = DivideByArgs(mca.ch1.roi0.count, [mca.ch1.lifetime, kth00.readback], log=True, name="div_det2l")
 
-from beamlinetools.devices.mca_derived import DerivedROI, DerivedMCA
+from beamlinetools.devices.mca_derived import DerivedROI, DerivedMCA, DerivedSignals
 
-dmca = DerivedMCA('',mca=mca, kth=kth00, name="dd")
+# dmca = DerivedMCA('',mca=mca, kth=kth00, name="dd")
+# dmca = DerivedSignals('',mca=mca, kth=kth00, name="dd")
 
 # div_mca = DivideByArgs(derived_from=mca.ch1.roi0.count, divisors=[mca.ch1.lifetime, kth00.readback], log=True, name="div_det2l")
 

beamlinetools/BEAMLINE_CONFIG/derived_signals.py

+from beamlinetools.devices.mca_derived import DerivedROI, DerivedMCA, DerivedSignals
+# dmca = DerivedMCA('',mca=mca, kth=kth00, name="dd")
+dmca = DerivedSignals('', name="dd")

beamlinetools/devices/mca_derived.py

@@ -78,24 +78,25 @@ class DivideByArgs(DerivedSignal):
 #                          name=name, parent=parent, **kwargs)
     
 class Tunnel():
-    def __init__(self, derived_from=None, divisors=None, log=False) -> None:
+    def __init__(self, **kwargs):#derived_from=None, divisors=None, log=False, **kwargs) -> None:
         DivideByArgs(derived_from, divisors, log=log)
-        
+
+from beamlinetools.BEAMLINE_CONFIG.beamline import mca, kth00 as kth
+
 class DerivedSignals(Device):
-    def __init__(self, prefix, *, mca_ch_roi=None, mca_ch_lifetime=None, kth=None, read_attrs=None, configuration_attrs=None,
+    lt       = Cpt(Tunnel,'', derived_from=mca.ch1.roi0.count, divisors=[kth.readback])
+    # ltcur    = Cpt(Tunnel,'', derived_from=mca.ch1.roi0.count, divisors=[mca.ch1.lifetime, kth.readback])
+    # ltcurlog = Cpt(Tunnel,'', derived_from=mca.ch1.roi0.count, divisors=[mca.ch1.lifetime, kth.readback], log=True)
+        
+    def __init__(self, prefix, *, read_attrs=None, configuration_attrs=None,
                  name=None, parent=None, **kwargs):
 
-        self.lt       = Cpt(Tunnel,'', derived_from=mca_ch_roi.count, divisors=[kth.readback])
-        self.ltcur    = Cpt(Tunnel,'', derived_from=mca_ch_roi.count, divisors=[mca_ch_lifetime, kth.readback])
-        self.ltcurlog = Cpt(Tunnel,'', derived_from=mca_ch_roi.count, divisors=[mca_ch_lifetime, kth.readback], log=True)
         super().__init__(prefix, read_attrs=read_attrs,
                          configuration_attrs=configuration_attrs,
                          name=name, parent=parent, **kwargs)
         
 
 class DerivedROI(Device):
-
-    
     def __init__(self, prefix, *, mca_ch=None,kth=None, read_attrs=None, configuration_attrs=None,
                  name=None, parent=None, **kwargs):
         self.roi0 = DerivedSignals('', mca_ch_roi=mca_ch.roi0, mca_ch_lifetime=mca_ch.lifetime, kth=kth)