Management device for managing robot operation program, network system, and method

A management device configured to manage an operation program of a robot, the management device comprising a processor configured to:

• acquire change information indicating a change made to the operation program, and execution information indicating that the operation program is executed to operate the robot;
• receive an input to authorize the acquired change information;
• determine whether or not the change information of the operation program under execution is authorized, when acquiring the execution information;
• and
• execute a predetermined accident-prevention process, when determining that the change information is not authorized,
• wherein the management device comprises:
• a storage configured to store, as change history data, a plurality of pieces of change information acquired by the processor each time a change is successively made to the operation program;
• and wherein
• the processor is configured to restore the operation program after a second change which is made before a first change, based on the change history data.

A method of managing an operation program of a robot, the method comprising:

• acquiring change information indicating a change made to the operation program, and execution information indicating that the operation program is executed to operate the robot, the change information including change content data indicating a content of the change;
• receiving an input which authorizes the acquired change information;
• determining whether or not the change information of the operation program under execution is authorized based on the received input, when acquiring the execution information;
• and
• executing a predetermined accident-prevention process, when determining that the change information is not authorized.