PEER-TO-PEER REGISTER EXCHANGE CONTROLLER FOR PLCS

摘要

The present invention relates to interconnecting image memory portions of a plurality of programmable logic controllers capable of operating at a higher speed than the operating speed of an individually actuated programmable logic controller (PLC).;In the present invention, a high-speed peer-to-peer programmable logic controller (PLC) network 21 is externally connected to a plurality of programmable logic controllers (PLCs), and each of the plurality of PLCs. The device is of course provided with a communication network 20 for providing communication between each of said plurality of PLCs, each of said plurality of PLCs storing state and control information having a plurality of memory blocks corresponding to said plurality of PLCs. Multi-port video memory 16, and a control processor 12 for successively executing a series of instructions to transfer data between the multi-port video memory 16 and the communication network 20. The high speed peer-to-peer PLC network is a high speed memory transfer network connected to each of the plurality of PLCs to transfer data between each of the plurality of PLCs. 17) further comprising: each of the plurality of PLCs from each of the plurality of memory blocks between each of the plurality of PLCs via the high speed memory transfer network 17 to enable individual update of the image memory. And a communication processor 18 for transmitting data in each of the blocks, characterized in that the transmission occurs independently of the operation of the control processor 12 and the communication network 20.