Control system using programmable logic controller

Details Control system using programmable logic controller Control system using programmable logic controller

1997-10-02

2000-02-01

Grant, William

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Plural processors

700 5, 700 67, 700 96, 31856811, 219110, G05B 1500

Patent

active

060213566

ABSTRACT:
A control system using a master programmable logic controller (PLC) which efficiently prevents the PLC system from performing an error operation caused by an abnormal state of a master PLC or a communication line error. The control system synchronizes an operating time thereof by resetting the entire remote slave units (RSU) according to the master PLC when respective power-on time points do not correspond between the master PLC and the RSUs, and selectively outputs a finally received data during a normal operation, or an emergency data predetermined by a user, when the data is not received from a master PLC.

REFERENCES:
patent: 4933833 (1990-06-01), Petroff
patent: 4937419 (1990-06-01), Kolodziej et al.
patent: 4998206 (1991-03-01), Jones et al.
patent: 5072374 (1991-12-01), Sexton et al.
patent: 5079491 (1992-01-01), Nose et al.
patent: 5621672 (1997-04-01), Kobayashi et al.
patent: 5632912 (1997-05-01), Cecil
patent: 5777870 (1998-07-01), Takaku et al.
patent: 5870301 (1999-02-01), Yakushuiji et al.

Affiliated with

Also associated with

Rating

Control system using programmable logic controller does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control system using programmable logic controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control system using programmable logic controller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-945332