diff --git a/script/local.py b/script/local.py
index e871a87..d5ba915 100644
--- a/script/local.py
+++ b/script/local.py
@@ -48,7 +48,7 @@ class RobotModbus(DeviceBase):
             index = index + 1
             if index == robot_args.size:
                 raise Exception("Invalid number of arguments")
-        robot.write(to_array(args, 'i'))
+        robot_args.write(to_array(args, 'i'))
         try:           
             self.request()         
             err = robot_ack.take()