| 摘要 |
<p>A plant monitoring system having a memory unit for storing process variables and relationship data between main monitor screens and sub-monitor screens, a display unit including a main display area, an auxiliary display area, a main monitor screen selection area, a sub-monitor screen selection area and an alarm occurrence display area, and a control unit for controlling the whole system. By requesting from the main monitor screen selection area, a main monitor screen is usually displayed in the main display area, and one of the related sub-monitor screens is displayed in the sub-monitor screen area upon an operator's request from the already displayed sub-monitor screen selection area. When an alarm occurs, an alarm screen is displayed in the main displayed area.</p> |
