| 摘要 |
PURPOSE:To enable to test an action of a plant apparatus controlled by a process controlling computer by displaying the plant constitution on a displaying device. CONSTITUTION:When a plant apparatus 2 is controlled by a process controlling computer 1 a switch 6 is closed, and a controlling data from the computer 1 is recorded on a process output image table 22 and is sent to the plant apparatus 2. Further an input data from the plant apparatus 2 is recorded on a process image table 21 in each signal. When an action of the plant apparatus 2 is tested from the computer 1, the switch 6 is turned off and the contents of the tables 21, 22 are displayed on a CRT displaying device 23 through a signal wire 25. Still more the content of the table 21 can be changed by an input from a key board 24. Accordingly, the controlling to the plant apparatus 2 can be tested by the CRT displaying device 23 and the key board 24. |
