Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r7fa65a3aae9c4ef70a6e53f3e3bb20f0425bd681 -re197cc27ab80e2250597746427725671f3491945
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 7fa65a3aae9c4ef70a6e53f3e3bb20f0425bd681)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision e197cc27ab80e2250597746427725671f3491945)
@@ -327,7 +327,7 @@
  * @details
  * Inputs : none
  * Outputs : UF change settings response msg constructed and queued.
- * @param accepted : alarm status record
+ * @param accepted : T/F - are settings ok?
  * @param reason : reason rejected (if not accepted)
  * @param volume_mL :
  * @param time_min :
@@ -373,13 +373,56 @@
 
 /*************************************************************************
  * @brief
+ * The sendChangeUFSettingsResponse function constructs a UF change settings \n
+ * option response to the UI and queues the msg for transmit on the appropriate CAN \n
+ * channel.
+ * @details
+ * Inputs : none
+ * Outputs : UF change settings option response msg constructed and queued.
+ * @param accepted : T/F - are settings ok?
+ * @param reason : reason rejected (if not accepted)
+ * @param volume_mL :
+ * @param time_min :
+ * @param ufRate_mL_min :
+ * @return TRUE if msg successfully queued for transmit, FALSE if not
+ *************************************************************************/
+BOOL sendChangeUFSettingsOptionResponse( BOOL accepted, U32 reason, F32 volume_mL, U32 time_min, F32 ufRate_mL_min )
+{
+    BOOL result;
+    F32 volume_L = volume_mL / (F32)ML_PER_LITER;
+    MESSAGE_T msg;
+    U08 *payloadPtr = msg.payload;
+
+    // create a message record
+    blankMessage( &msg );
+    msg.hdr.msgID = MSG_ID_USER_UF_SETTINGS_CHANGE_CONFIRMATION_RESPONSE;
+    msg.hdr.payloadLen = sizeof( BOOL ) + sizeof( U32 ) + sizeof( F32 ) + sizeof( U32 ) + sizeof( F32 );
+
+    memcpy( payloadPtr, &accepted, sizeof( BOOL ) );
+    payloadPtr += sizeof( BOOL );
+    memcpy( payloadPtr, &reason, sizeof( U32) );
+    payloadPtr += sizeof( U32 );
+    memcpy( payloadPtr, &volume_L, sizeof( F32 ) );
+    payloadPtr += sizeof( F32 );
+    memcpy( payloadPtr, &time_min, sizeof( U32 ) );
+    payloadPtr += sizeof( U32 );
+    memcpy( payloadPtr, &ufRate_mL_min, sizeof( F32 ) );
+
+    // serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
+    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_REQUIRED );
+
+    return result;
+}
+
+/*************************************************************************
+ * @brief
  * The sendChangeTreatmentDurationResponse function constructs a treatment \n
  * duration change response to the UI and queues the msg for transmit on the \n
  * appropriate CAN channel.
  * @details
  * Inputs : none
  * Outputs : treatment duration change settings response msg constructed and queued.
- * @param accepted : alarm status record
+ * @param accepted : T/F - are settings ok?
  * @param reason : reason rejected (if not accepted)
  * @param time_min : alarm status record
  * @param volume_mL : alarm status record
@@ -419,7 +462,7 @@
  * @details
  * Inputs : none
  * Outputs : Blood & dialysate rate change response msg constructed and queued.
- * @param accepted : alarm status record
+ * @param accepted : T/F - are settings ok?
  * @param reason : reason code for rejection or unused if accepted
  * @param bloodRate : new blood flow rate
  * @param dialRate : new dialysate flow rate