Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r6cd114c4deffb81e85c6cd3ebaf550fe4661efda -r84bb8663dae71170e1743a2bed37b0aa47465b47
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 6cd114c4deffb81e85c6cd3ebaf550fe4661efda)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 84bb8663dae71170e1743a2bed37b0aa47465b47)
@@ -538,8 +538,33 @@
     result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_REQUIRED );
 
     return result;
-}
+}
+
+/*********************************************************************//**
+ * @brief
+ * The sendTreatmentPeriodDataToUI function constructs a treatment period
+ * data message to the UI and queues the msg for transmit on the appropriate CAN channel.
+ * @details Inputs: none
+ * @details Outputs: Treatment parameter ranges msg constructed and queued.
+ * @param periodDataPtr treatment log period data record pointer
+ * @return TRUE if msg successfully queued for transmit, FALSE if not
+ *************************************************************************/
+BOOL sendTreatmentPeriodDataToUI( TREATMENT_LOG_DATA_PERIODIC_T * periodDataPtr )
+{
+    MESSAGE_T msg;
+    U08 *payloadPtr = msg.payload;
 
+    // Create a message record
+    blankMessage( &msg );
+    msg.hdr.msgID = MSG_ID_HD_TREATMENT_LOG_PERIOD_DATA;
+    msg.hdr.payloadLen = sizeof( TREATMENT_LOG_DATA_PERIODIC_T );
+
+    memcpy( payloadPtr, periodDataPtr, sizeof( TREATMENT_LOG_DATA_PERIODIC_T ) );
+
+    // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
+    return serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_REQUIRED );
+}
+
 /*********************************************************************//**
  * @brief
  * The handlePatientDisconnectionConfirmCmd function handles user confirms