| 摘要 |
To monitor processes, respectively real-time controlled machines, for example machine tools, the operation times, respectively the time intervals characteristic of the process, respectively the working phases of the machine are measured and stored automatically in a processor and compared with threshold time values, said threshold time values being programmed in a learning process of the processor. In case of unacceptable time gaps, the processor may intervene directly in the process, for example to disconnect certain functions, and even the whole machine. A plant adapted to execute such process comprises a microprocessor (3) which is connected to the machine in question, respectively to its control device by data input channels (6, 7) for time measuring signals and which may act on the machine by means of an output channel (8). Other data which are characteristic of the process, such as the pressure, the temperature etc. may be input in the processor and taken into consideration once they have been converted into digital values. By means of an input/output unit (9), it is possible to record the unacceptable time gaps between the time measuring signals and the threshold time values, to display the instant states of the process in progress and to enter the data by hand. |
