Lsis Co., Ltd.

Ls Industrial Systems Co., Ltd.

Soo Gang Lee

Dae Hyun Kwon

Young Chan Kwon

Dong Kyu Park

Disclosed is a PLC system having a plurality of CPU modules and a control method thereof, wherein the method includes ascertaining a clock signal when a count is a count corresponding to a time slot allocated by a master CPU module, generating a clock signal by accessing to a backplane, and ending generation of clock signal at a time when the access to the backplane ends.

PLC system having a plurality of CPU modules and control method thereof

An access controlling method of a dual port memory system is provided. The method includes: requesting, by a first processor, an access from a dual port memory; and transmitting, by the dual port memory, a result signal according to the access request to the first processor, wherein the result signal includes a first result signal for notifying access success, a second result signal for notifying access failure, and a third result signal for notifying access hold.

Access controlling method of dual port memory system

Disclosed is an adaptive multi-redundant ring network system using a 2 port Ethernet communication module capable of selecting a path, the network system including a main network system including a first main control unit and a plurality of first slaves; and a sub-network system including a second main control unit and a plurality of second slaves, wherein each of the plurality of first slaves and each of the plurality of second slaves include 2-port Ethernet communication modules, and each of the plurality of first slaves, each of the plurality of second slaves, the first slave and the second slave are selectively connected via the 2-port Ethernet communication modules.

Adaptive multi-redundant ring network system and method for selecting detour

Provided is a network system and a method for determining a network path, the network system including a plurality of extension units, each containing dualized basic units and dualized extension Ethernet modules, a first ring network connected by a first basic unit and a plurality of first extension Ethernet modules, and a second ring network connected by a second basic unit and a plurality of second extension Ethernet modules, wherein the first extension Ethernet module or the second extension Ethernet module transmits or receives data along a network path determined by judging, by the first extension Ethernet module or the second extension Ethernet module, if the first ring network is connected to the second extension Ethernet module using an intrinsic number of each extension Ethernet module.

Network system and method for determining network path

A method for electing a ring manager of ring topology network and a node are disclosed, where, to this end, a node responsible for electing the ring manager periodically requests each node of diagnostic information on packet traffic and receives the diagnostic information on packet traffic from each node, newly elects a node capable of performing a ring manager role, and informs each node of information on the newly elected ring manager, whereby, the ring network can be more effectively operated because the ring manager is elected based on network load status that changes in real time even in the course of a ring network being initially set up and operated responsive to structural conditions including hop count of each nod and MAC node.

Method for electing ring manager of ring topology network, and node

A data relay apparatus for communication module is disclosed, whereby a plurality of normally operative communication modules can perform data communication thereamong by allowing a data relay unit to relay data received by an input/output (I/O) port of an inoperative communication module in a case there is available an inoperative communication module among the plurality of communication modules, in a network configured by connecting the plurality of communication modules having two I/O Ethernet communication ports connected via a line topology.

Growing community of inventors

Anyang-si, South Korea

Soo Gang Lee