| 摘要 |
<p>When the press machine and the like are to be controlled in a centralized manner, there are used many sensors for detecting the conditions of various portions of the machine and many actuators for controlling the conditions of various portions of the machine. The invention provides a device for detecting the position of broken line in a series controller wherein provision is made of peripheral processing devices which indirectly control the sensors and the actuators, and these peripheral processing devices are connected in series via signal lines in an annular manner via a central processing unit or in a serial manner relative to the central processing unit, such that position of breakage on the signal line can be detected. That is, when breakage develops on the signal line and no signal is transmitted to the peripheral processing device that corresponds to the broken line, then this peripheral processing device produces a line breakage signal. Upon receiving the line breakage signal from a controller of the preceding stage, the peripheral processing devices in the subsequent stages add the broken line position data of broken line signal one by one successively. Thus, as the line breakage signal is input to the central processing unit, the calculation is carried out in a reversed manner from the added value of broken line position data of line breakage signal that is input, and a position of broken line is detected.</p> |
