fix(flomni): beamline detection for the trigger source by ddg1 only (exposure box motors removed)

Mirko 2026-10-27: a real (not simulated) ddg1 is sufficient. Simulated or no ddg1 -> soft trigger;
a failing check still counts as beamline (hardware trigger). Docs + PDF.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017KicuVBRC7jB1TLG5hLZwx

csaxs_bec/bec_ipython_client/plugins/flomni/docs/local_contact_only-realtime_system.md

@@ -70,11 +70,10 @@ default and is in no profile (flOMNI `FeedbackLoop/soft_trigger.md`).
 **`flomni_fermat_scan` sets the trigger source at every scan start** (2026-10-26):
 
 - **At the beamline → hardware.** At the beamline means: `ddg1` is configured with a real (not simulated) device
-  class, or one of the exposure box motors `ebtrx`, `ebtry`, `ebtrz`, `ebsupport` is in the session. If this cannot
-  be confirmed (web HMI not reachable, refused) the scan is aborted: with the soft trigger the detector would not
-  be triggered while flOMNI exposes internally. A failing check also counts as beamline.
-- **Otherwise (simulated `ddg1`, no beamline devices) → soft** with `soft_exposure_ms` = `exp_time` ×
-  `frames_per_trigger` × 1000. If that fails the scan continues with a warning (alarm).
+  class (only `ddg1` decides, 2026-10-27). If this cannot be confirmed (web HMI not reachable, refused) the scan is
+  aborted: with the soft trigger the detector would not be triggered while flOMNI exposes internally. A failing check
+  also counts as beamline.
+- **Otherwise (simulated or no `ddg1`) → soft** with `soft_exposure_ms` = `exp_time` × `frames_per_trigger` × 1000. If that fails the scan continues with a warning (alarm).
 
 By hand: `flomni.rt_settings.trigger_set_soft(True, exposure_ms=100)`, `trigger_set_soft(False)`;
 `trigger_show()` shows both groups.

csaxs_bec/scans/flomni_fermat_scan.py

@@ -69,10 +69,6 @@ class FlomniFermatScan(ScanBase):
     MAX_CORRIDOR_SIZE = 3  # Corridor size is capped at this value (in um) for stability
     MIN_FERMAT_ASYMMETRY = 0.1  # Practical working range for fermat_asymmetry (soft-clamped)
     MAX_FERMAT_ASYMMETRY = 10.0
-    # Devices that exist only in the beamline configuration (bl_endstation.yaml: exposure box motors); with one of
-    # them, or a ddg1 that is not simulated, the session is at the beamline -> hardware trigger (flOMNI soft trigger,
-    # FeedbackLoop/soft_trigger.md, 2026-10-26)
-    BEAMLINE_DEVICES = ("ebtrx", "ebtry", "ebtrz", "ebsupport")
 
     def __init__(
         # fmt: off
@@ -386,26 +382,20 @@ class FlomniFermatScan(ScanBase):
 
     def at_beamline(self) -> tuple[bool, str]:
         """
-        Is this session at the beamline? True when ddg1 is configured with a real (not simulated) device class or
-        one of BEAMLINE_DEVICES is configured; False only when both say no. A failing check counts as beamline,
-        so the hardware trigger is the fallback.
+        Is this session at the beamline? True when ddg1 is configured with a real (not simulated) device class
+        (flOMNI soft trigger, FeedbackLoop/soft_trigger.md; ddg1 only, Mirko 2026-10-27). A failing check counts as
+        beamline, so the hardware trigger is the fallback.
 
         Returns:
             (at_beamline, reason)
         """
         try:
             devices = self.device_manager.devices
-            reasons = []
             if "ddg1" in devices:
                 cls = str((getattr(devices["ddg1"], "_config", None) or {}).get("deviceClass", ""))
                 if ".sim." not in cls and "Simulated" not in cls:
-                    reasons.append(f"ddg1 is {cls or 'not simulated'}")
-            found = [name for name in self.BEAMLINE_DEVICES if name in devices]
-            if found:
-                reasons.append("beamline devices " + ", ".join(found))
-            if reasons:
-                return True, "; ".join(reasons)
-            return False, "no beamline devices, ddg1 simulated or absent"
+                    return True, f"ddg1 is {cls or 'not simulated'}"
+            return False, "ddg1 simulated or absent"
         except Exception as exc:  # pylint: disable=broad-except
             return True, f"beamline check failed ({exc}), treated as beamline"
 

tests/tests_scans/test_flomni_fermat_scan.py

@@ -162,7 +162,6 @@ def _trigger_stub(devices, apply_result=None, apply_exc=None, exp_time=0.1, fram
     """A stand-in for a FlomniFermatScan instance with a device list {name: deviceClass} and the loop-settings
     device answering /api/settings/apply."""
     scan = mock.MagicMock()
-    scan.BEAMLINE_DEVICES = FlomniFermatScan.BEAMLINE_DEVICES
     scan.device_manager.devices = {
         name: mock.MagicMock(_config={"deviceClass": cls}) for name, cls in devices.items()
     }
@@ -187,9 +186,8 @@ def test_at_beamline_detection():
     assert FlomniFermatScan.at_beamline(_trigger_stub({"ddg1": SIM_DDG1}))[0] is False
     assert FlomniFermatScan.at_beamline(_trigger_stub({}))[0] is False
     assert FlomniFermatScan.at_beamline(_trigger_stub({"ddg1": REAL_DDG1}))[0] is True
-    # a beamline-only device counts even with a simulated ddg1
-    at_bl, reason = FlomniFermatScan.at_beamline(_trigger_stub({"ddg1": SIM_DDG1, "ebtrx": MOTOR}))
-    assert at_bl is True and "ebtrx" in reason
+    # only ddg1 decides: other devices (e.g. exposure box motors) do not count
+    assert FlomniFermatScan.at_beamline(_trigger_stub({"ddg1": SIM_DDG1, "ebtrx": MOTOR}))[0] is False
     # a failing check counts as beamline (hardware trigger is the fallback)
     scan = _trigger_stub({})
     scan.device_manager.devices = None