| 摘要 |
PURPOSE:To secure a data link with other station when a fault has occured in the course of transmitting a data, by providing a changeover switch of one station and the other station, on the inside of the interface. CONSTITUTION:A connection part 207 of an interface 202, and a connection part 208 are connected to a signal line 203 to one station, and to a signal line 204 to the other station, respectively. A connction part 209 is connected to a CPU and also is connected to a control part 211. When data from the CPU is being transfered through a data link with one station through the connection part 207, if a signal showing that a data transfer is impossible is received from said station, the control part 211 secures a data link with the other station by laying down a switch 210 to the side of the connection part 208. In this way, even if one station has become faulty, a data transfer is secured. |
