| 摘要 |
PURPOSE:To stop the execution of transition by calculating AND by multiplying the mask value of a mask pattern prepared from a current state to an inputted transition moving command, and judging the result. CONSTITUTION:When a command is prepared on the side of a local station and the prepared command is transmitted, the side of a computer loading a satellite judges whether the current state is on-track or ground test, and in the case of on-track, the mask value corresponding to the defined current control state is defined as a new mask value. In the case of the ground test, all the mask values are turned to '1'. Next, the input command and the mask value calculated from the current state are ANDed, and it is judged whether the result is '0' or not. When it is '0', the next state is kept as it is. When it is not '0', the result is successively investigated from the right bit to the left bit, and the transition is moved to the state corresponding to the bit raising '1' for the first time. |
