update RHCVDFFrequency

Furnace/FurnaceRT/Equipments/PMs/PMAux.cs

@@ -922,7 +922,7 @@ namespace FurnaceRT.Equipments.PMs
                 }
                 else
                 {
-                    SC.SetItemValue("PM1.RHC.RHCVDFFrequency", 0);
+                    SC.SetItemValue("PM1.RHC.RHCVDFFrequency", 0.0d);
                     TrigVFD?.SetAOTrigger((float)SC.GetValue<double>("PM1.RHC.RHCVDFFrequency"), out _);
                 }
             }