Patent ID: 7484019
Filing Date: 2009-01-27
Classification: G06F

Abstract:
1. A serial-connection and parallel-communication fast interface, comprising: a Programmable Logic-Controller (PLC) host comprising an external connector unit and a first microprocessor; and at least one expansion device comprising at least one connector connected to the PLC host and another expansion device; wherein the PLC host and the at least one expansion device are connected in a serial-connection and parallel-communication manner, which is established by address lines, data lines, control lines and I/O addressing lines of a shared bus connected between the PLC host and the at least one expansion device; and wherein the at least one expansion device automatically assigns the order thereof and automatically allows or prohibits data accessing of the PLC host according to clamping values sent through the I/O addressing lines, and the at least one expansion device further comprises;