exp_hutch_shutter added back in

src/aare/daq/daq.py

@@ -2755,6 +2755,8 @@ class AareDAQ:
                 f"State already set to {target}",
                 extra={"from_state": curr_state, "to_state": target},
             )
+            #TODO unify BeamlineStateEnum and BeamlineState and allow transition from same state to same state to recover motor positions!
+            #TODO or just allow BEC thingy
             return
         elif target != curr_state:
             self.__cfg.state = BeamlineStateEnum.Moving
@@ -2946,7 +2948,7 @@ class AareDAQ:
                 back_light=self.back_light,
                 cryojet_K=self.__devs.cryojet_temp,
                 shutter_open=self.__devs.shutter,
-                exp_shutter_open=self.__devs.shutter,
+                exp_shutter_open=self.__devs.exp_shutter.state(),
                 flux_ph_s=self.__devs.full_flux,
                 sample_camera=self.__devs.samcam_settings,
                 name=self.__bl,
@@ -3000,6 +3002,7 @@ class AareDAQ:
         except AerotechCommunicationError as e:
             logger.warning(f"Aeroetch error in _safe_geom: {e}")
             aerotech_error = f"Cannot connect to Aerotech: {e}"
+            self.__devs.exp_shutter.close()
             aerotech_connected = False
         except Exception as e:
             logger.warning(f"Unexpected error in _safe_geom: {e}")

src/aare/daq/devices.py

@@ -36,6 +36,7 @@ class BeamlineDevices:
         self.bec_worker = BECClientWorker(beamline)
         logger.debug("initialising BEC worker done")
         self.__smargon = smargon.Smargon(beamline)
+        self.exp_shutter = ExperimentalHutchShutter(beamline=self._beamline)
 
         #only used at the moment to get hlm and llm from BEC
         self.__dtz = self.bec_worker.dev.det_z
@@ -303,9 +304,6 @@ class BeamlineDevices:
     def set_dtz(self, value: float, /, wait: bool = True):
         if value < self.__dtz.low_limit:
             #raise ValueError(f"Detector distance cannot be less than {self.detector_distance_minimum} mm")
-            logger.warning(f"Requested detector distance {value} is less than minimum: {self.detector_distance_minimum}, setting to minimum")
-            value = self.detector_distance_minimum
-        self.__dtz.move(value, wait=wait)
             logger.warning(f"Requested detector distance {value} is less than minimum: {self.__dtz.low_limit}, setting to minimum")
             value = self.__dtz.low_limit + self.dtz_mod
         if value > self.__dtz.high_limit: