@startuml
skinparam monochrome true
start
while ()
	:openComRobot?;
	:err = robot.Open();
	if (err) then (robot_ok)
		:msgSend = new Message(MESSAGE_ANSWER_ACK);
	else
		:msgSend = new Message(MESSAGE_ANSWER_NACK);
	endif
	:messageToMon!msgSend;
	
	:closeComRobot?;
	:robot.Close();
endwhile
stop
@enduml