| 摘要 |
In order to control the increase in a transmission time of a signal associated with addition of a sensor, provided is a photoelectric sensor system (1) which includes a communication unit (10) connected to a PLC (2); and a plurality of distributed units (20A, 20B) connected to the communication unit (10), wherein sensors (30) are connected to the plurality of distributed units (20A, 20B); the plurality of distributed units (20A, 20B) are connected to the communication unit (10) in a bus type arrangement; the distributed unit (20A) transmits signals from sensors (30G-30I) to the communication unit (10); the communication unit (10) transmits the signal from the distributed unit (20A) to the PLC (2); the distributed unit (20B) transmits signals from sensors (30J-30N) to the communication unit (10); and the communication unit (10) transmits the signals from the distributed unit (20B) to the PLC (2). |
