| 摘要 |
PURPOSE:To prevent abnormal operator and disabled control of a controller by transmitting a data while each start transmission format and receiving transmission format are compared and decided in transmitting the data between each data station and the controller. CONSTITUTION:A data from any of controllers PCs 12A-12E is fed to corresponding data stations 11A-11E and after the data is subject to format judgement, the data is fed to data transmission sections 14A-14E of an objective controller and after the format judgment is applied again, the data is given to the PCs 15A-15E. The operating state of the controller 14E is checked and if it is failed, the own station number and the controller number are changed and the start transmission data from a start station STA is transmitted to another station. Then the data is returned via the other station. If a memory address or the like is dissident, the transmission is rejected so that an unnecessary dada or a defective data is not written to or read from the PC15E. |
