Sequence block display system
Patent 4385367 Issued on May 24, 1983. Estimated Expiration Date: 
December 11, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 11, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3623157 Sequence block display system Method and apparatus for operator interrogation of simulated control circuits Jump structure for a digital control system Programmable dual stack relay ladder diagram line solver with shift register Patent #: 4247909 InventorsAssigneeApplicationNo. 06/215373 filed on 12/11/1980US Classes:345/440Graph generatingExaminersPrimary: Nusbaum, Mark E.Assistant: Fleming, Michael R. Attorney, Agent or FirmInternational ClassG05B 19/05 (20060101)Foreign Application Priority Data1980-01-16 JPAbstractA sequence block display system used with a programmable sequence controller for displaying a sequence block on a screen of a cathode-ray tube display unit in the form of ladder diagram. The sequence block display system is provided with a data processor and a buffer memory which includes first, second and third memories. The first memory is capable of storing the whole of sequence programs stored in the sequence controller and the second memory is capable of storing at least one sequence block. The third memory is adapted to store output instructions, which are used to designate a sequence block, in the same order as each designated sequence block is displayed on the screen and further to read out the output instructions in the reverse order for displaying the sequence blocks which are put out of the screen. | |
