| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to perform sure backup even at the time of abnormality of local controllers for executing different control receptively. SOLUTION: For backing up plural local controllers 11 , 12 to 1n with a backup controller 7, a switch means 1 that is connected to the side of the controller body part 11 at the time of normal operation and is connected to the end side of a private bus line 5 at the time of abnormality of the controller body part 11 of a transmission abnormality, is provided between a controller body part 11, which composes each of the local controllers 11 to 1n , and an input/output part 12. Also, a data base 6 for storing necessary data for each local controller 11 to 1n is provided, data necessary for control, which the abnormal local controller uses at the time of abnormality of the controller body part 11 or of a transmission abnormality is downloaded from the data base 6 and job side equipment is controlled through the private bus line 5 and the input/output part 12. |
