Index: SDDs/MainTreatmentScreen.puml
===================================================================
diff -u -r77ba0083b790f7c1c851c60ecaeaa4f2e7eff7a8 -r84b2b28f6ff10787a228a95cae89f487fbbbd165
--- SDDs/MainTreatmentScreen.puml	(.../MainTreatmentScreen.puml)	(revision 77ba0083b790f7c1c851c60ecaeaa4f2e7eff7a8)
+++ SDDs/MainTreatmentScreen.puml	(.../MainTreatmentScreen.puml)	(revision 84b2b28f6ff10787a228a95cae89f487fbbbd165)
@@ -23,6 +23,9 @@
     == Tx Time ==
     TD -> SW: MSG: [x3B: #3] \nTD Treatment Time Data:\n(U32) txDurSecs\n(U32) txElapsedSec\n(U32) txRemainingSecs
     SW -> UI: CMD: Update Treatment Time:\n(U32) txDurSecs\n(U32) txElapsedSec\n(U32) txRemainingSecs
+    == Parameter Ranges ==
+    TD -> SW: MSG: [x43: #6] \nTD Treatment Param Ranges:\n(U32) minTreatmentTime\n(U32) maxTreatmentTime\n(F32) minUFVolume\n(F32) maxUFVolume\n(U32) minDialRate\n(U32) maxDialRate
+    SW -> UI: CMD: Update Param Ranges:\n(U32) minTreatmentTime\n(U32) maxTreatmentTime\n(F32) minUFVolume\n(F32) maxUFVolume\n(U32) minDialRate\n(U32) maxDialRate
     == Tx Parameter set points ==
     TD -> SW: MSG: [x4F: #3] \nTD treatment Set Points Data\n(U32) bloodFlow\n(U32) dialFlow\n(F32) dialTemp
     SW -> UI: CMD: Update TX Set Points Data:\n(U32) bloodFlow\n(U32) dialFlow\n(F32) dialTemp