Control system

• US 10,313,095 B2
• Filed: 10/10/2017
• Issued: 06/04/2019
• Est. Priority Date: 10/26/2016
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Natori, Katsunobu, Nakajima, Tetsuya, Nishikawa, Satoshi, Shiraishi, Masahiro, Harada, Hideo
• Primary Examiner(s): Chaudry, Mujtaba M
• Application Number:
  US15/728,592
• Publication Number:
  US 20180115405A1
• Time in Patent Office: 602 Days
• Field of Search: None
• CPC Class Codes: G06F 11/0796 Safety measures, i.e. ensuring safe condition in the event of error, e.g. for controlling element
• CPC Class Codes: G06F 11/1633 using mutual exchange of the output between the redundant processing components
• CPC Class Codes: G06F 7/57 Arithmetic logic units [ALU], i.e. arrangements or devices for performing two or more of the operations covered by groups G06F7/483 – G06F7/556 or for performing logical operations G06F7/49, G06F7/491 take precedence
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex

Abstract

A control system includes an arithmetic device configured of an A system arithmetic unit including a data dividing unit, a B system arithmetic unit including a data dividing unit, and an A system communication control unit including a data combining unit and a collation unit, wherein the A system arithmetic unit and the B system arithmetic unit have a duplex configuration, the A system arithmetic unit and the B system arithmetic unit are separated by a gap, a frame output from the A system arithmetic unit is transmitted to a B system communication control unit through the A system communication control unit and an interface element, and a frame output from the B system arithmetic unit is transmitted to the A system communication control unit through the B system communication control unit and an interface element.

Claims

1. A control system, comprising:

an arithmetic device configured of an A system arithmetic unit including a first data dividing unit, a B system arithmetic unit including a second data dividing unit, and an A system communication control unit including a data combining unit and a collation unit,

wherein the A system arithmetic unit and the B system arithmetic unit form a duplex system,

the A system arithmetic unit and the B system arithmetic unit are separated by a gap such that wirings between the A and B system arithmetic units do not cross,

a frame output from the A system arithmetic unit is transmitted to a B system communication control unit through the A system communication control unit and a first interface element, and

a frame output from the B system arithmetic unit is transmitted to the A system communication control unit through the B system communication control unit and a second interface element, and

wherein a signal which is transmitted to the A system communication control unit and the B system communication control unit from the A system arithmetic unit is transmitted by being divided,

a signal which is transmitted to the A system communication control unit and the B system communication control unit from the B system arithmetic unit is transmitted by being divided,

a response signal which is transmitted to the A system arithmetic unit from the A system communication control unit is collectively transmitted without being divided,

a response signal which is transmitted to the B arithmetic unit from the B system communication control unit is collectively transmitted without being divided, and

the response signals from the A system communication control unit and the B system communication control unit are not collated in the arithmetic device.

2. The control system according to claim 1,

wherein the A system arithmetic unit and the B system arithmetic unit include an REQ generating unit and an ACK receiving unit, and

the A system communication control unit and the B system communication control unit include an REQ receiving unit and an ACK generating unit.

3. The control system according to claim 1,

wherein the arithmetic device includes a section of blocking the transmitted frame in a case in which a collation result of the A system communication control unit is discordant and a section of blocking the transmitted frame in a case in which a collation result of the B system communication control unit is discordant.

4. The control system according to claim 1,

wherein the control system has a CRC or parity check, or an error detecting function of the transmitted frame of using ECC in order to detect an error of the transmitted frame between the arithmetic device and a digital input device, and between the arithmetic device and a digital output device.

5. The control system according to claim 1,

wherein communication between the arithmetic device and a digital input device, and between the arithmetic device and a digital output device is performed by a frame, and a dividing width of the frame is capable of being changed.