CONTROLLER

摘要

A controller, such as a PLC, stores a task execution condition management table that indicates execution conditions for tasks and executes programs periodically in accordance with the execution conditions for the tasks. The controller provides a setting instruction for modifying the execution conditions for the tasks. A user enters the setting instruction in a user program by using a support device, for example. The controller updates the task execution condition management table with regard to a task associated with the instruction by executing the instruction for modifying the execution conditions for the tasks, including priorities of the tasks and cycles of the tasks, contained in the user program, and executes the programs in accordance with the updated execution conditions for the tasks.

主权项

1. A controller that controls a target apparatus, comprising:
a storage section configured to store a plurality of programs including a user program and task information indicating an execution condition for a task; and a control section configured to execute the programs periodically in accordance with the execution condition indicated by the task information, wherein the controller controls the target apparatus by causing the control section to perform the user program periodically, the user program can contain a setting instruction for modifying the execution condition for the task, and the control section updates the task information in the storage section by executing the setting instruction contained in the user program, and executes the programs in accordance with the updated execution condition for the task.