diff --git a/src/lmwsip/__init__.py b/src/lmwsip/__init__.py
index ceb5fe3..d6c9545 100644
--- a/src/lmwsip/__init__.py
+++ b/src/lmwsip/__init__.py
@@ -842,7 +842,7 @@ Returns:
 """
         cmdstr=process + " " + self.meetnet + "," + location + "," + \
                parameter + "," + time_delta + "," + day + "," + \
-               time_of_day + values + "\r" 
+               time_of_day + "," + values + "\r" 
         d = self.sendrecv(cmdstr)
         if (d[0] != '!'):
             raise LmwCmdWarn(cmdstr, d)