Patent ID: 7133747

Claim:
A robot controller which is constructed so that a control part for controlling a robot and a portable teaching operating part communicate with each other by wireless communications, wherein said portable teaching operating part comprises: emergency stop operating means which place said robot in an emergency-stop state by cutting off the supply of electric power to the driving motors of said robot; emergency stop release operating means which restore said robot to a state in which its movement is possible by releasing said emergency-stop state; a plurality of communications data generating circuits which respectively generate communications data expressing an emergency stop command based on operations for said emergency stop operating means, and which respectively generate communications data expressing an emergency stop release command based on operations for said emergency stop release operating means; and transmitting means which transmit communications data expressing said emergency stop command and communications data expressing said emergency stop release command to said control part by wireless communications; and said control part comprises: receiving means which receive communications data expressing said emergency stop command and communications data expressing said emergency stop release command from said transmitting means; wherein said receiving means place said robot in an emergency-stop state when receiving even a single set of communications data expressing an emergency stop command generated by said plurality of communications data generating circuits.