| 摘要 |
PURPOSE:To evade an abrupt increase in operator's workload by sending up to the taret value of a control loop a certain time ahead when a control computer sends the target value of the control loop, and allowing an instrumentation controller to operate automatically on the basis of the target value when the computer is not in operation. CONSTITUTION:The control computer 21 is connected to a decentralized digital instrumentation controller 23 through a transmitting sampler 22. The controller 23 has a target value storage area 33 for storing a target value supplied from the computer 21 and a timer pointer storage area 32. The computer 21 calculates the time-series value of a future desired target value forecasted from the current desired target value and the point of time and supplies it to the controller 23 in advance. When the computer 21 stops, the controller 23 calculates the time series value of the future desired target value and supplies it to the controller previously. When the computer 21 stops, the controller 23 performs feedback control according to the future desired target value. |
