US 6,301,509 B1 · Programmable logic control system

Abstract

The invention is aimed at providing a programmable logic control system capable of executing a plurality of functions to realize high-speed data communication between itself and a control input/output unit without degrading the performance of the programmable logic control system, thereby significantly enhancing the performance and simplifying maintenance. To attain the aim, the programmable logic control system comprises a plurality of separate modules obtained by grouping the operating sections and the input/output sections of the controllers in the form of separate modules, and mounted on a back board. On the back board, there is also provided a control input/output unit connector. A signal is used for the control input/output unit connector connected parallel to the separate modules via the back board, so that communication can be performed, during use of a bus, between the separate modules and the control input/output unit.

Claims7

Dependent claims

A programmable logic control system to be connected to a computer, the system comprising:

at least one input/output module including at least one port connected to at least one target device to be controlled;
at least one processor module configured to control said at least one target device;
a communication bus electrically connected in parallel to said at least one input/output module and to said at least one processor module;
and
a communication signal bus electrically connected in parallel to said at least one input/output module and said at least one processor module, wherein at least one of said at least one input/output module and said at least one processor module is connected to said computer by at least said communication signal bus.

2 more elements

Dependencies are inferred from the claim text.

Programmable logic control system

Life of this patent

Programmable logic control system

Life of this patent

Abstract

Claims7