| 摘要 |
<p>PURPOSE:To immediately allow updating of a monitor screen display to follow a variation of internal information by selecting a read-out procedure or a write procedure of information from a memory, based on an information read-out request outputted by following a variation of the internal information, and executing read-out or write of the internal information. CONSTITUTION:When internal information of a PLC (programmable logic controller) is varied, a monitor device 1 uses a read-out strobe signal outputted from the PLC as a trigger and reads out the varied internal information from the PLC, and displays it on a display device 4. When an internal information read- out request is inputted to the PLC from the monitor device 1, in case the internal information is varied, the monitor device 1 confirms ON of a response strobe signal and executes read-out of the internal information, displays the read-out internal information on the display device 4 by a display device and a display method corresponding to a monitor device set in advance to a monitor table 3d, and updates the displayed information. In such a way, by following a variation of the internal information, the varied internal information can be displayed immediately.</p> |
