| 摘要 |
PURPOSE:To avoid the collision of an instruction generated at an abnormal time to secure an operation by installing a means which identifies a data address accompanying with the data received from a CPU to an intelligent terminal control device and other means which selects data processing share between the devices on a basis of the recognized signal. CONSTITUTION:A data processing system which performs dual control on terminal devices 4a-4n that input and/or output data is constituted of two sets of CPUs 1a and 1b and intelligent terminal control devices 2a and 2b are installed to the system. Then a data address identifying means 21 which identifies the data addresses accompanying with the input data from the CPUs 1a and 1b is installed to each of the control devices 2a and 2b. Addresses (a) and (b) identified by the identifying means 21 are added to the ANDs 1 and 2 of a share selecting means 22 to obtain the logic with the output of a self-display setting circuit 22a. The share of the data processing between its own and another systems is selected in accordance with a switch permissible signal and input data to its own system or another system are outputted from a switching circuit 22b to facilitate to control the process share. |
