| 摘要 |
PURPOSE:To suppress a control error down to the minimum by setting up the initial value of a control vairable in an RAM in which the stored contents are changed by the penetration of radiation. CONSTITUTION:A radiation detector 14 attached to the RAM13 detects radiation penetrated into the RAM13. Detecting radiation changing the stored contents of the RAM13, the detector 4 outputs a detection signal, which is supplied to an interruption signal generating circuit 20. In accordance with the input signal, the circuit 20 outputs prescribed interruption signal and working signal, which are supplied to a CPU11. The CPU11 analyzes these input signals and executes a presribed instruction in accordance with the analyzed result. Namely, the initial value of a control vairable stored in an RAM12 is read out by said instruction and written in the prescribed address of the RAM13. The initial value for prescribed control is set up in the RAM13. |
