| 摘要 |
<p>Provided is a multi-axis photoelectric sensor (S) that outputs a high-level signal while a detection area is not shielded and stops the signal output when the detection area is shielded, wherein a sequence of a change in a non-shielded state/shielded state of the detection area formed by optical axes and in inputs from muting sensors (A1, B1, A2, B2) is divided into a plurality of stages for monitoring, and muting processing is executed on a condition that the stages progress normally. When an abnormality in the sequence is detected in a stage being monitored, indicator lights (10, 20) are blinked by the number of times corresponding to the stage in which the abnormality has been detected, to make notification of the type of the stage in which the abnormality has been detected.</p> |
