Patent ID: 6151625
Filing Date: 2000-11-21
Classification: G05B,H04L

Abstract:
An interface module for receiving data requests from a remote location in order to provide access to a programmable logic controller from a communication network, the module comprising:a central processing unit;a real time operating system operating the central processing unit;a network interface for communicating with the communication network at a nominal data transfer rate of not less than 100 Mbs;a back plane driver for communicating with the programmable logic controller through a back plane of the programmable logic controller;a protocol stack;a client task for communicating with the back plane driver and the protocol stack for initiating received requests;a server task for communicating with the back plane driver and the protocol stack for responding to received requests; anda protocol task for communicating with the back plane driver and the protocol stack for receiving and responding to protocol task requests.