diff --git a/script/TestRobotCmds.py b/script/TestRobotCmds.py
index 27d82d5..67f9991 100644
--- a/script/TestRobotCmds.py
+++ b/script/TestRobotCmds.py
@@ -1,5 +1,6 @@
 
 import java.lang.System as System
+      
 
 index = 0
 max_time = 0
diff --git a/script/local.py b/script/local.py
index c0e2152..54280c6 100644
--- a/script/local.py
+++ b/script/local.py
@@ -36,10 +36,10 @@ class RobotModbus(DeviceBase):
          robot_req.write(0)
 
     def execute(self, command, *argv):
-        #if robot_req.read() != 0:
-        #    raise Exception("Ongoing command")
-        #if robot_ack.read() != 0:
-        #    raise Exception("Robot is not ready")
+        if robot_req.read() != 0:
+            raise Exception("Ongoing command")
+        if robot_ack.read() != 0:
+            raise Exception("Robot is not ready")
         robot_cmd.write(command)
         args = [0,0,0,0,0,0]
         index = 0        
@@ -61,13 +61,13 @@ class RobotModbus(DeviceBase):
     
     def request(self):
         robot_req.write(1)
-        #while robot_ack.read() == 0:
-        #    time.sleep(0.001)
+        while robot_ack.read() == 0:
+            time.sleep(0.001)
 
     def cancel_request(self):
         robot_req.write(0)
-        #while robot_ack.read() != 0:
-        #    time.sleep(0.001)
+        while robot_ack.read() != 0:
+            time.sleep(0.001)
         
     def mount(self, puck, sample):
         return self.execute('1', '1', puck, sample)