An abnormality diagnosis system (130) that diagnoses abnormalities in a plurality of motor systems (10) including a motor (11) for moving a traveling body (20) comprises: a comparison target specification unit (131) that specifies a comparison target system among a plurality of motor systems, that will be the target for comparison with a diagnosis target system; a state-related value acquisition unit (132) that obtains a state-related value being a value related to the operation state of each motor, from the diagnosis target system and the comparison target system; and a diagnosis unit (133) that executes comparison of the state-related value obtained from the diagnosis target system and the state-related value obtained from the comparison target system, uses the comparison results, and diagnoses the presence of abnormalities in the diagnosis target system.
ABNORMALITY DIAGNOSIS SYSTEM AND ABNORMALITY DIAGNOSIS METHOD