| 摘要 |
<p>The present invention includes a connection unit that performs reception of a request from an upper-level device and transmission of a response thereto via the established connection for each application; a communication buffer that temporarily stores requests received by the connection unit for each connection; a system main unit that reads a requested device value from the input/output memory area; a priority storage area that stores setting of a priority level for each connection; and a communication scheduling unit that successively obtains requests from the communication buffer, transfers the obtained request to the system main unit, and transfers the device value read by the system main unit to the connection unit as a response, wherein the communication scheduling unit obtains requests with a higher frequency for a connection for which a higher priority is set in the priority storage area.</p> |
