move Compare status acquiring after erase-start call

csaxs_bec/devices/epics/delay_generator_csaxs/ddg_1.py

@@ -390,9 +390,9 @@ class DDG1(PSIDeviceBase, DelayGeneratorCSAXS):
         # counters are forwarded to BEC. Once the flag is set, we create a TransitionStatus DONE->ACQUIRING
         # and start the acquisition through erase_start.put(1). Finally, we wait for the card to go to ACQUIRING state.
         mcs._omit_mca_callbacks.clear()  # pylint: disable=protected-access
+        mcs.erase_start.put(1)
         status_acquiring = CompareStatus(mcs.acquiring, ACQUIRING.ACQUIRING)
         self.cancel_on_stop(status_acquiring)
-        mcs.erase_start.put(1)
 
         return status_acquiring
 
@@ -599,7 +599,17 @@ class DDG1(PSIDeviceBase, DelayGeneratorCSAXS):
             # an acquisition regularly with a WaitTimeoutError, the timeout can be increased but it should
             # be investigated why the EPICS interface is slow to respond.
             try:
-                status_mcs.wait(timeout=3)
+                current_time = time.time()
+                while time.time() - current_time < 3 and mcs.acquiring.get() != ACQUIRING.ACQUIRING:
+                    time.sleep(0.1)
+                    logger.warning(
+                        f"MCS card is not in acquiring state, current state: {mcs.acquiring.get()}"
+                    )
+                if mcs.acquiring.get() != ACQUIRING.ACQUIRING:
+                    logger.warning(
+                        f"MCS card is not in acquiring state, current state: {mcs.acquiring.get()}"
+                    )
+                    status_mcs.wait(timeout=3)
             except Exception as exc:
                 logger.warning(f"MCS did not go to Acquiring within 3s. Retrying erase_start {exc}")
                 mcs.erase_start.put(1)