Index: DDDefs.h
===================================================================
diff -u -rada74713e29bcb1fc906b5ffef3f82a4af225670 -r9ca6e6dfbe780f8a0a4e4725bb2bf8ffa2d19d70
--- DDDefs.h	(.../DDDefs.h)	(revision ada74713e29bcb1fc906b5ffef3f82a4af225670)
+++ DDDefs.h	(.../DDDefs.h)	(revision 9ca6e6dfbe780f8a0a4e4725bb2bf8ffa2d19d70)
@@ -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
 {