Index: DGDefs.h
===================================================================
diff -u -red99101f153fb2e6139f9be116cda8b46082406e -r53ac512a795b5a2c638c7cb83bb4c640838415f2
--- DGDefs.h	(.../DGDefs.h)	(revision ed99101f153fb2e6139f9be116cda8b46082406e)
+++ DGDefs.h	(.../DGDefs.h)	(revision 53ac512a795b5a2c638c7cb83bb4c640838415f2)
@@ -41,6 +41,7 @@
     DG_MODE_CHEM,                       ///< Chemical Disinfect mode
     DG_MODE_CHFL,                       ///< Chemical Disinfect Flush mode
     DG_MODE_HCOL,                       ///< Heat disinfect cooling mode
+    DG_MODE_ROPS,                       ///< RO permeate sample mode
     DG_MODE_NLEG,                       ///< Not legal - an illegal mode transition occurred
     NUM_OF_DG_MODES                     ///< Number of DG operation modes
 };
@@ -493,6 +494,31 @@
 /**@}*/
 
 /**
+ *  @addtogroup DGROPermeateSampleMode
+ *  @{
+ */
+
+/// Enumeration of RO permeate mode.
+enum DG_RO_Permeate_States
+{
+    DG_RO_PERM_SAMPLE_STATE_START = 0,                          ///< RO Permeate Sample, start mode state
+    DG_RO_PERM_SAMPLE_STATE_DRAIN_R1,                           ///< RO Permeate Sample, drain reservoir 1 state
+    DG_RO_PERM_SAMPLE_STATE_DRAIN_R2,                           ///< RO Permeate Sample, drain reservoir 2 state
+    DG_RO_PERM_SAMPLE_STATE_FLUSH_DRAIN,                        ///< RO Permeate Sample, flush drain state
+    DG_RO_PERM_SAMPLE_STATE_FLUSH_DIALYSATE,                    ///< RO Permeate Sample, flush dialysate state
+    DG_RO_PERM_SAMPLE_STATE_FLUSH_CONCENTRATE_STRAWS,           ///< RO Permeate Sample, flush concentrate straws state
+    DG_RO_PERM_SAMPLE_STATE_FLUSH_R2_TO_R1_AND_DRAIN_R1,        ///< RO Permeate Sample, flush R2 to R1 and drain R1 state
+    DG_RO_PERM_SAMPLE_STATE_SAMPLE_COLLECTION,                  ///< RO Permeate Sample, sample collection
+    DG_RO_PERM_SAMPLE_STATE_CANCEL_BASIC_PATH,                  ///< RO Permeate Sample, cancel basic path state
+    DG_RO_PERM_SAMPLE_STATE_CANCEL_WATER_PATH,                  ///< RO Permeate Sample, cancel water path state
+    DG_RO_PERM_SAMPLE_STATE_COMPLETE,                           ///< RO Permeate Sample, complete mode state
+    NUM_OF_DG_RO_PERM_STATES                                    ///< Number of RO permeate mode states
+};
+typedef enum DG_RO_Permeate_States DG_RO_PERM_STATE_T;    ///< Type for DG RO Permeate states enumeration
+
+/**@}*/
+
+/**
  *  @addtogroup DGServiceMode
  *  @{
  */
@@ -534,6 +560,8 @@
     DG_CMD_REQUEST_CONC_MIXING_RATIOS = 16,    ///< Command to request DG to send the concentrate pumps mixing ratios
     DG_CMD_START_CHEM_DISINFECT_FLUSH = 17,    ///< Command to request DG to start chemical disinfect
     DG_CMD_STOP_CHEM_DISINFECT_FLUSH = 18,     ///< Command to request DG to stop chemical disinfect
+    DG_CMD_START_RO_PERMEATE_SAMPLE = 19,      ///< Command to request DG to start RO permeate sample mode
+    DG_CMD_STOP_RO_PERMEATE_SAMPLE = 20,       ///< Command to request DG to stop RO permeate sample mode
     NUM_OF_DG_COMMANDS                         ///< Number of DG commands
 };
 typedef enum DG_Command DG_COMMAND_T;   ///< Type for DG commands enumeration