| 摘要 |
PURPOSE:To facilitate the laying construction of cables by reducing the number of cables of a control system having complicated control contents by collecting signals by using optical fibers as a main cable laid remotely. CONSTITUTION:A process input equipment 3 consists of an I/O controller 12, a port memory 13, a signal writing controller 14, and a port controller 15; an I/O bus 7 is connected to the controller 12, and the main controller 17 of an optical fiber signal collecting system 11 is connected to the writing controller 14. A receiver and a transmitter in this controller 17 are connected to a main optical fiber cable 18, and then connected to switches 15A, 15B... of terminals arranged at distant points through optical fiber cables 16A, 16B... connected to optical branching circuits provided to the cable 18. The controller 17 transmits and receives optical pulses to and from the switches 15A, 15B..., and thus the number of cables of the system 11 is decreased, thereby collecting data by a CPU5. |
