| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a valve controller of a petrochemical plant capable of monitoring the control state of a valve while quickly and appropriately controlling the valve and of outputting information required for external equipment while accommodated in an explosion proof structure. <P>SOLUTION: In this valve controller, a control part 20 which feedback-controls the opening of the valve based on a valve opening value input from an opening sensor and a valve control instruction value input from a main controller, and a display part 40 which comprises storage parts 44, 46 storing control information by the control part 20 and an optical communication interface 43 are accommodated in the explosion proof structure. The display part 40 outputs the control information to an information collecting device 70 through the optical communication interface while constituted so that the control information obtained via a shared memory CM connected to the control part 20 by LAN is stored in the storage part and accommodated in the explosion proof structure. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
