There are two modes of transient transmission, cyclic transmission and transient transmission, for the communication between a master station and a local station.

(1) Cyclic transmission
      Bit information (remote input RX and remote output RY) and word information (remote register RWw, RWr)
      allows N: N data communications between programmable controller CPU modules.

(2) Transient transmission
      Data in the buffer memory of a local station and CPU module's devices can be read and written with desired timing.