add graph_y_limit attribute

src/ScanPGunVgrid.py

@@ -68,6 +68,10 @@ def main():
         elog_text = str(selfseq_dev.read_attribute("elog_text").value)
         trigger_gun = PyTango.DeviceProxy('booster/accessi/plc_accessi')
         timing_enable = PyTango.DeviceProxy('b/timing/injexttiming_b')
+        try:
+            graph_y_limit = selfseq_dev.read_attribute("graph_y_limit").value
+        except:
+            graph_y_limit = 2
     except Exception as e:
         #print(str(e))
         selfseq_dev.write_attribute("ScriptErr", f"{type(e).__name__} while defining tango devices: {e}")      # scrive l'eventuale errore sull'attributo "ScriptErr" della sequenza
@@ -204,7 +208,7 @@ def main():
         if topup_test_mode == True:
             y_range = (0,0.6)
         else:
-            y_range = (0,1.2)
+            y_range = (0,graph_y_limit)