Patent ID: 8352078

Claim:
A robot system comprising: a plurality of robots; a plurality of robot controllers configured to respectively control the robots; a plurality of pendants respectively connected to the plurality of robot controllers and respectively comprising enabling devices configured to output enable switch signals to switch turning on and off the robots in a teaching mode including a plurality of operating modes; the robot controllers respectively comprising robot group controllers each having an operating mode storage device configured to store operating mode information to determine which operating mode is selected from the operating modes in the teaching mode; an enable-link-signal line sequentially connecting the robot group controllers to transmit a first enable link input signal between the robot group controllers; each of the robot group controllers being configured to generate a first enable link output signal based on the operating mode information stored in the operating mode storage device, the enable switch signal from the enabling device, and the first enable link input signal input from a preceding robot group controller of the robot group controllers via the enable-link-signal line, and being configured to output the first enable link output signal as the first enable link input signal via the enable-link-signal line; and each of the robot group controllers being configured to output a drive-power-on enable signal to turn on and off the robot in accordance with the enable link signal, the operating mode information stored in the operating mode storage device, and the first enable link input signal input from a preceding robot group controller of the robot group controllers via the enable-link-signal line.