Index: leahi_dialin/dd/proxies/td_proxy.py
===================================================================
diff -u -r9dd43942f571c0f63e69e191b5b33b566a07c641 -re5a48b1ffd05454177a0966e96f8bb1755884615
--- leahi_dialin/dd/proxies/td_proxy.py	(.../td_proxy.py)	(revision 9dd43942f571c0f63e69e191b5b33b566a07c641)
+++ leahi_dialin/dd/proxies/td_proxy.py	(.../td_proxy.py)	(revision e5a48b1ffd05454177a0966e96f8bb1755884615)
@@ -115,7 +115,7 @@
 
 
     def cmd_td_send_dd_start_pre_gen_request(self, start: bool = 0, dialysate_rate: float = 0.0, dialysate_temp: float = 0.0,
-                                             acid_conv_factor: float = 0.0, bicarb_conv_factor: float = 0.0, sodium: int = 0, bicarb_volume: int = 0, substitution_rate: float=0.0):
+                                             acid_conv_factor: float = 0.0, bicarb_conv_factor: float = 0.0, sodium: int = 0, bicarb_volume: int = 0):
         """
         Constructs and sends a TD start pre gen dialysate request to the DD.
 
@@ -126,7 +126,6 @@
         :param bicarb_conv_factor: (Float) bicarb conversion factor
         :param sodium: (Integer) bicarb conversion factor
         :param bicarb_volume: (Integer) bicarb volume
-        :param substitution_rate: (Float) substitution rate
         :return:
         """
         stt = integer_to_bytearray(start)
@@ -136,8 +135,7 @@
         bic = float_to_bytearray(bicarb_conv_factor)
         sod = integer_to_bytearray(sodium)
         bvl = integer_to_bytearray(bicarb_volume)
-        sub = float_to_bytearray(substitution_rate)
-        payload = stt + dial + temp + acd + bic + sod + bvl + sub
+        payload = stt + dial + temp + acd + bic + sod + bvl
 
         cmd_generic_override(payload = payload,
                              reset = None,