Index: firmware/App/Services/SystemComm.c
===================================================================
diff -u -rf15b66d94af1b415f57a7cc37372dba4fa793fbe -rf2fc3885d55b51a6201c8f4f38e57cf7bcf3ee46
--- firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision f15b66d94af1b415f57a7cc37372dba4fa793fbe)
+++ firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision f2fc3885d55b51a6201c8f4f38e57cf7bcf3ee46)
@@ -52,8 +52,7 @@
 #define MAX_COMM_CRC_FAILURE_WINDOW_MS  (10 * SEC_PER_MIN * MS_PER_SECOND)  ///< CRC error window
 
 #define MSG_NOT_ACKED_TIMEOUT_MS        150     ///< Maximum time for a Denali message that requires ACK to be ACK'd
-
-#define MSG_NOT_ACKED_TIMEOUT_MS_INIT   5000    ///< Maximum time for a Denali message that requires ACK to be ACK'd on the INIT state for the first (UI version request) message of the POST
+#define MSG_NOT_ACKED_TIMEOUT_MS_INIT   5000    ///< Maximum time for a Denali message that requires ACK to be ACK'd on the INIT state for the first (UI version request) message of the POST
 #define MSG_NOT_ACKED_MAX_RETRIES       3       ///< Maximum number of times a message that requires ACK that was not ACK'd can be re-sent before alarm
 #define PENDING_ACK_LIST_SIZE           25      ///< Maximum number of Denali messages that can be pending ACK at any given time
 
@@ -310,10 +309,10 @@
                     canXmitRetryCtr = MAX_XMIT_RETRIES;
                     signalCANXmitsCompleted();          // Clear pending xmit flag
                     clearCANXmitBuffers();              // Clear xmit buffers - nothing is going out right now
-                }
-            }
-        }
-    }
+                } // end - are we retrying xmit or are we alone on CAN bus
+            } // end - pending xmit timeout?
+        } // end - transmit in progress or not
+    } // end - DG not alone on CAN bus
 }
 
 /*********************************************************************//**
@@ -1613,6 +1612,18 @@
                 handleTestFansRPMAlarmStartTimeOffsetOverrideRequest( message );
                 break;
 
+            case MSG_ID_HD_FANS_DUTY_CYCLE_OVERRIDE:
+                handleSetFansDutyCycleOverrideRequest( message );
+                break;
+
+            case MSG_ID_HD_GET_SW_CONFIG_RECORD:
+                handleGetHDSoftwareConfigRecord( message );
+                break;
+
+            case MSG_ID_HD_SET_SW_CONFIG_RECORD:
+                handleSetHDSoftwareConfigRecord( message );
+                break;
+
             case MSG_ID_HD_REQ_CURRENT_TREATMENT_PARAMETERS:
                 handleTestCurrentTreamtmentParametersRequest( message );
                 break;