| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a plant controller capable of continuing a control operation by reactivating only communication means when an error is a transient error caused by electromagnetic noise or the like. <P>SOLUTION: In a plant controller, control operation means 50 transfers control data with an external device connected to a communication network 40 through communication means 60 provided with a CPU 61 and data exchange means 62 for exchanging the control data by the communication means 60 and the control operation means 50 is provided. The plant controller includes: information storage means 101 for saving and preserving prescribed data exchange information used for the operation of the data exchange means 62 when an error is detected in the communication means 60; reactivation means 102 for reactivating the CPU 61 provided in the communication means; and information restoration means 103 for making the data exchange means 62 restore the data exchange information preserved in the information storage means 101 after the CPU 61 is reactivated. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
