Index: simulator/plugins/treatmentranges/loader.py
===================================================================
diff -u -rf4523ffcaff0d27f7392c943f0a487fcb01a7d34 -r341770d5391499aea02f9a840ac96e6562215699
--- simulator/plugins/treatmentranges/loader.py	(.../loader.py)	(revision f4523ffcaff0d27f7392c943f0a487fcb01a7d34)
+++ simulator/plugins/treatmentranges/loader.py	(.../loader.py)	(revision 341770d5391499aea02f9a840ac96e6562215699)
@@ -54,6 +54,7 @@
         :return: none
         """
         self.timer.timeout.connect(self.do_ranges_data)
+        self.timer.timeout.connect(self.do_duration_data)
         self.sldDurationValue.valueChanged.connect(self.do_duration_data)
 
     def _init_widgets(self):
@@ -65,11 +66,12 @@
         self.timer.start(1000)
 
     @Slot()
-    def do_duration_data(self, value):
+    def do_duration_data(self):
         """
         sends the duration message
         :return: none
         """
+        value = self.sldDurationValue.value()
         self.hd_simulator.cmd_set_treatment_time(
             self.spnDurationMax.value() * 60, value
         )