From dd310accfdad2249d1bc9aed690d86bfd9bea795 Mon Sep 17 00:00:00 2001
From: Filip Leonarski <filip.leonarski@psi.ch>
Date: Fri, 19 Sep 2025 16:18:35 +0200
Subject: [PATCH] DAQ: when __set_state is called check to see if beamline is
 busy otherwise raise an exception

---
 daq/src/aaredaq/daq.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/daq/src/aaredaq/daq.py b/daq/src/aaredaq/daq.py
index d46e6513..1ae31760 100644
--- a/daq/src/aaredaq/daq.py
+++ b/daq/src/aaredaq/daq.py
@@ -1219,6 +1219,9 @@ class AareDAQ:
         #
         curr_state = self.__cfg.state
 
+        if not self.__cfg.state_busy:
+            raise Exception("Beamline should be busy")
+
         if target == BeamlineStateEnum.Maintenance:
             self.__cfg.state = BeamlineStateEnum.Maintenance
         elif target != curr_state: