Patent ID: 6571273
Filing Date: 2003-05-27
Classification: G05B

Abstract:
A process control system comprising:a network; a plant which has a process to be controlled; a plurality of computers connected to said network for communication therebetween, each of said plurality of computers comprising a memory unit with an object storage therein, said object containing a function which is independently changeable with use of software, said plurality of computers comprising a first computer having a first memory unit having an object therein with a process input-output function, a second comptuer having a second memory unit having an operation function, a third computer having a third memory unit having a control function, and a fourth computer having a fourth memory unit having a data processing function, said object of each computer memory unit having a different selected function with a combination of said functions of said memory units constructing a distributive process control in said plurality of computers with each object of each different memory unit sharing a function of the process control with at least another-object; means for providing process control signals between said plant and said first computer; means for providing an input signal to said second computer so that said operating function stored in said second memory unit causes said control function of said third computer memory unit to cause said input-output functions of said first computer memory unit to control the plant process utilizing said data processing function of said fourth computer memory unit and based on information previously stored in a separate memory unit and causing display of the resulting processed information related to said processing control, control whereby control is effected independently of hardware of the system and change of a particular function is attained without disturbing other functions.