| 摘要 |
PROBLEM TO BE SOLVED: To provide a system for enhancing the reliability of a program for controller in a Java language, which can check whether a program prepared by using the language of a form for dynamically locating the code or data of the program in a memory area called heap area in the Java language or the like is not rewritten by a cause such as noise. SOLUTION: In the controller, in which an original program stored on a ROM is loaded to a RAM and run by a CPU, having the CPU, the ROM and the RAM, when time from the start of running after loading exceeds a scheduled set time limit value, the program loaded and operated in the RAM up to the moment is rejected and the program stored on the ROM is loaded to the RAM again. |
