| 摘要 |
<p>In the field of time partitioning, in order to guarantee the independence of a safety-related system and enable the execution of tasks in a fixed cycle, a safety control device is provided with a processor, and a system programme for controlling the allocation of processor execution times to tasks. In the system programme, the processor schedules tasks according to scheduling information in which the period of a safety-related TP to which a safety-related task belongs, or the period of a non-safety related TP to which a non-safety related task belongs are shown in a fixed cycle, and when, in a fixed cycle TP task, the processing of a task has been completed, the processor stores completion information, enabling the task to be executed, and when completion information is saved, in the scheduling, even if the fixed cycle TP task can be executed, the processor suppresses the allocation of an execution time, and deletes completion information from when the period of the fixed cycle TP finishes, until the period of the TP in the next cycle starts.</p> |
