Safety control system

• US 20090228116A1
• Filed: 07/21/2008
• Published: 09/10/2009
• Est. Priority Date: 07/19/2007
• Status: Active Grant

• Current Assignee: Yokogawa Electric Corporation
• Original Assignee: Yokogawa Electric Corporation
• Inventors: Oosako, Satoru
• Granted Patent: US 7,912,563 B2
• Time in Patent Office: Days
• US Class Current: 700/7
• CPC Class Codes: G05B 19/4186 by protocol, e.g. MAP, TOP
• CPC Class Codes: G05B 2219/25218 Broadcast mode, originator, destinator address, command, check data
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

A safety control system includes a plurality of safety control stations connected to a control bus to communicate with other, and a link transmission communicating means having a function of transmitting own data to other safety control station at a fixed cycle via the control bus every safety control station and also receiving transmitted data from other safety control station.

Claims

1. A safety control system, comprising:

a plurality of safety control stations connected to a control bus to communicate with other; and

a link transmission communicating means having a function of transmitting own data to other safety control station at a fixed cycle via the control bus every safety control station and also receiving transmitted data from other safety control station.

2. A safety control system according to claim 1, wherein the safety control station adds safety information to the data that is to be transmitted to the control bus at a fixed cycle.

3. A safety control system according to claim 2, wherein the safety control station has a safety layer, which is used to generate and diagnose the safety information, in an interface to the control bus.

4. A safety control system according to claim 2, wherein the safety information contains a CRC code.

5. A safety control system according to claim 3, wherein the safety information contains a CRC code.

6. A safety control system according to claim 1, wherein the safety control station communicates with a distributed control system via the control bus.