SAFETY CONTROL METHOD, SAFETY CONTROL CIRCUIT AND SAFETY CONTROL SYSTEM FOR ROBOT

A safety control method, safety control circuit and safety control system for a robot, which relate to the field of safety control of robots. The safety control circuit is provided with a plurality of input interface circuits (12), which can access to a safety input device (20). The safety control method comprises: determining first-type information of a safety input device (20) to which input interface circuits (12) access (S11); on the basis of the first-type information, generating test signals (S12); transmitting the test signals to the input interface circuits (12), and receiving from the input interface circuits (12) feedback signals of the accessed safety input device (20) for the test signals (S13); on the basis of the feedback signals, determining whether the accessed safety input device (20) is abnormal (S14); and in response to there being an abnormality, controlling a robot to execute a safety policy (S15). According to first-type information of safety input devices (20) which are connected to dif