| 摘要 |
PURPOSE:To prevent the occurrence of a serious accident due to the program miss, by checking the output request from an additional control program and by preventing the requested output from being given to a control object device in case of an erroneous output. CONSTITUTION:CPU10 streos the test system and uses typewriter 11 to output its information. Information in CPU10 or input information is displayed on display device 12. Keyboard device 13 constitutes the interface for conversation between the test system and the operator, and items such as decision for correctness of the output request obtained by execution of the control program registered in the test system are used to check the output request from an additional control program on a basis of output number 20 of CPU10. In case of an erroneous output, the requested output is not given to the control object device by column 21. |
