NETWORK TYPE CONTROL SYSTEM, AND COMMUNICATION DELAY TIME CONTROL METHOD IN NETWORK TYPE CONTROL SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a network type control system capable of performing process management by a feedback control, maintaining control performance while curbing variation in communication delay time, and a communication delay time control method in the network type control system.;SOLUTION: The network type control system comprises: control object equipment for controlling the state of a control object process; a measuring device 20A for measuring a state quantity of the object process; and a control device 40 connected to the control object equipment and the measuring device 20A via a network 30 for performing feedback control of the control object equipment on the basis of a measurement value of a state quantity of the control object process measured by the measuring device. The network type control system has means for calculating a communication delay time in the network, and means for reducing information quantity transmitted to the network for performing the feedback control when the communication delay time exceeds a prescribed value.;COPYRIGHT: (C)2013,JPO&INPIT