Index: DDDefs.h
===================================================================
diff -u -rffe968d36207b80678a9fd77a834f48f7d3b5aed -rca2cbd27bec325b8837880e387b940ee0302328e
--- DDDefs.h	(.../DDDefs.h)	(revision ffe968d36207b80678a9fd77a834f48f7d3b5aed)
+++ DDDefs.h	(.../DDDefs.h)	(revision ca2cbd27bec325b8837880e387b940ee0302328e)
@@ -197,6 +197,15 @@
 };
 typedef enum DD_GenD_Mode_States DD_GEND_MODE_STATE_T;          ///< Type for DD gen dialysate mode states enumeration
 
+/// Enumeration of Isolated UF sub-states within Generate Dialysate: Isolated UF.
+enum DD_GenD_Isolated_UF_Sub_States
+{
+    DD_GEND_ISO_UF_RUN_STATE = 0,                               ///< Isolated UF run sub-state (Quf > 0)
+    DD_GEND_ISO_UF_PAUSE_STATE,                                 ///< Isolated UF pause sub-state (Quf = 0)
+    NUM_OF_DD_GEND_ISO_UF_SUB_STATES                            ///< Number of isolated UF sub-states
+};
+typedef enum DD_GenD_Isolated_UF_Sub_States DD_GEND_ISO_UF_SUB_STATE_T;   ///< Type for isolated UF sub-states
+
 /// DD acid types
 enum dd_acid_types
 {