Hyeong Tae
Hyeong Tae Lim, Seoul KR
Patent application number | Description | Published |
---|---|---|
20140297650 | METHOD AND APPARATUS FOR MANAGING INDEX IN A SHARED MEMORY - The present invention relates to a method of managing an index in a shared memory in a multi-process environment. An apparatus for managing an index in a shared memory is implemented to log an address of an index node where an operation is to be performed, information on a number of slots stored in a slot count unit, and information on moved slots stored in a slot movement count unit. | 10-02-2014 |
Hyeong Tae Park, Suwon-Si KR
Patent application number | Description | Published |
---|---|---|
20120022849 | PLC SYMBOL STRUCTURE FOR A PLC CODE FOR AUTOMATICALLY GENERATING AN INPUT/OUTPUT MODEL, AND SIMULATION APPARATUS AND SIMULATION METHOD FOR TESTING THE PLC CODE USING SAME - Disclosed are a PLC (Programmable Logic Controller) symbol structure for a PLC code for automatically generating an input/output model, and a simulation apparatus and a simulation method for testing the PLC code using the same. In one embodiment, a computer-readable recording medium records a PLC code including a plurality of PLC symbols, wherein each of the PLC symbols includes a plurality of levels identified by an identifier, and a computer automatically generates an input/output model using the structure of each of the PLC symbols, thereby performing a simulation for testing the PLC code. The PLC symbol structure according to one embodiment systematically contains information required for automatically generating the input/output model, making it possible to automatically generate the input/output model for testing the PLC code in an easier manner without knowledge of simulation and modeling, and reducing the time consumed and the labor required for generating the input/output model. | 01-26-2012 |
Hyeong Tae Park, Seoul KR
Patent application number | Description | Published |
---|---|---|
20140055273 | METHOD OF ALARMING ABNORMAL STATE OF AUTOMATED MANUFACTURING SYSTEM BASED ON PLC SIGNAL PATTERN - A method of alarming an abnormal state of a line of an automated manufacturing system using a programmable logic controller (PLC) signal pattern is provided. The method includes obtaining a plurality of change sequences of a plurality of PLC signals for control of the line in a normal operating system by repeating a cycle for which the line is sequentially controlled by the PLC signals that are transmitted and received between a PLC and the line according to an operation of PLC internal logic; acquiring a reference sequence from a plurality of the change sequences, wherein the reference sequence indicates an order of change of a plurality of the PLC signals for control of the line in a normal operating state; and determining whether the line is in a normal operating state or an abnormal operating system based on whether or not the reference sequence is matched with a change sequence of a plurality of PLC signals for control of the line in use after the acquisition of the reference sequence, and outputting a determination result. | 02-27-2014 |