diff --git a/grum/BECAdapter.py b/grum/BECAdapter.py
index ca10c2f..f0d90b4 100644
--- a/grum/BECAdapter.py
+++ b/grum/BECAdapter.py
@@ -31,7 +31,7 @@ class BECAdapter:
         self.recon = recon
 
         if self.monitor:
-            self.grum_client_monitor.new_plot( "monitor",{'xlabel':'time', 'ylabel':"sls_ring_current", "format": "time" })
+            self.grum_client_monitor.new_plot( "monitor",{'xlabel':'time', 'ylabel':"sls_ring_current", "frmt": "time" })
         if self.motor_pos:
             self.grum_client_motor_pos.new_plot("Motor position", {'xlabel':'average_x_st_fzp', 'ylabel':"average_y_st_fzp" })
 
@@ -48,21 +48,23 @@ class BECAdapter:
     
     def scan_status_update(self, segment):
         # whenever a new scan starts or ends, for now changes scan nr both in start and end
-        segment = BECMessage.ScanStatusMessage.loads(segment.value)
-        self.scan_nr = segment.content["info"]["scan_number"]
-        self.positions = segment.content["info"]["positions"]
-        xpos = [x for x,y in self.positions]
-        ypos = [y for x,y in self.positions]
-        if len(segment.content["info"]["primary"]) == 2:
-            self.scan_running = True
-            # print("Plotting new positions")
-            if self.motor_pos:
-                self.grum_client_motor_pos.new_plot( "Motor position", {"xs": xpos, "ys":ypos, 'xlabel':'average_x_st_fzp', 'ylabel':"average_y_st_fzp", "format": "Dots"})
-        else:
-            self.scan_running = False
+        if segment.content["status"] == "open":
+            segment = BECMessage.ScanStatusMessage.loads(segment.value)
+            print(segment.content)
+            self.scan_nr = segment.content["info"]["scan_number"]
+            self.positions = segment.content["info"]["positions"]
+            xpos = [x for x,y in self.positions]
+            ypos = [y for x,y in self.positions]
+            if len(segment.content["info"]["primary"]) == 2:
+                self.scan_running = True
+                # print("Plotting new positions")
+                if self.motor_pos:
+                    self.grum_client_motor_pos.new_plot( "Motor position", {"xs": xpos, "ys":ypos, 'xlabel':'average_x_st_fzp', 'ylabel':"average_y_st_fzp", "frmt": "Dots"})
+            else:
+                self.scan_running = False
 
-        if len(segment.content["info"]["primary"]) == 1:
-            print("umv")
+            if len(segment.content["info"]["primary"]) == 1:
+                print("umv")
         
     def start_scan_segment_sub(self):
         self._scan_segment_sub = self.redis_connector.consumer(
diff --git a/grum/plotdesc.py b/grum/plotdesc.py
index 3050c8f..b7be666 100644
--- a/grum/plotdesc.py
+++ b/grum/plotdesc.py
@@ -1,16 +1,16 @@
 from pyqtgraph import DateAxisItem
+from collections import deque
 
 class PlotDescription:
 
-    def __init__(self, name, title=None, xlabel=None, ylabel=None, xs=None, ys=None, format=None):
+    def __init__(self, name, title=None, xlabel=None, ylabel=None, xs=None, ys=None, frmt=None):
         self.name = name
         self.title = title
         self.xlabel = xlabel
         self.ylabel = ylabel
-        self.xs = [] if xs is None else list(xs)
-        self.ys = [] if ys is None else list(ys)
-        self.format = format
-
+        self.xs = deque(maxlen = 5000) if xs is None else deque(xs, maxlen = 5000)
+        self.ys = deque(maxlen = 5000) if ys is None else deque(ys, maxlen = 5000) 
+        self.format = frmt
 
     @property
     def data(self):
@@ -42,7 +42,7 @@ class PlotDescription:
         #     res = plotwidget.plot(self.xs, self.ys, name=self.name, **style)
 
         res = plotwidget.plot(self.xs, self.ys, name=self.name, **style)
-        if format == "time":
+        if self.format == "time":
             axis = DateAxisItem()
             plotwidget.setAxisItems({'bottom':axis})