| 摘要 |
PURPOSE:To simplify the whole of a circuit, by writing a program stop instruction code in a program area of a processor to be stopped and executing this stop instruction to stop a program. CONSTITUTION:A local control program sets ''operating'' to an LP monitoring area of a local memory 2 at certain intervals. A local monitoring program operated by the control of a global processor 7 checks contents of the LP monitoring area; and when ''operating'' is set to this area, the local monitoring program judges that an LP system is operated normally, and the local monitoring program sets ''LP monitoring'' to this area. If ''operating'' is not set to this area over a certain time, the local monitoring program judges that an abnormality occurs in the LP system, and the local monitoring program writes the program stop instruction code in the memory 2. A local processor 8 executes this stop instruction code to stop the program. |
