Industrial Robot System Optically Indicating Motion Area of Robot

A robot system, comprising:

• a robot installed on a surface of a floor;
• an irradiating unit irradiating visible light onto the surface of the floor;
• a forcible stopping unit forcibly stopping the robot from moving when an abnormality occurs in the robot system;
• and
• a control unit controlling the irradiating unit so as to irradiate visible light onto a motion area and a latent area, the motion area being an area occupied on the surface of the floor by a space within which the robot is allowed to move during execution of a predetermined task, the latent area being an area occupied on the surface of the floor by a space within which the robot is likely to move until the robot is forcibly stopped from moving by the forcible stopping unit during execution of the task,
• wherein the control unit is configured to set the latent area such that the latent area required in cases where the robot executes the predetermined task at an execution acceleration which is higher than or equal to a predetermined acceleration is set to be wider than the latent area required in cases where the robot executes the predetermined task at the execution acceleration which is lower than the predetermined acceleration.