Unlock instant, AI-driven research and patent intelligence for your innovation.

Redundant control system

A redundant control and non-redundant technology, applied in general control systems, control/regulation systems, program control, etc., can solve problems such as load resistance interference, expensive wiring, and load resistance dependence

Inactive Publication Date: 2007-01-10
SIEMENS AG
View PDF0 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are, inter alia, that the wiring is expensive due to additional components, and that the load resistance is dependent on the number of analog input units that happen to be employed; since in redundant operation two analog input units are used, in non-redundant operation ( e.g. during replacement of an analog input unit) using only one analog input unit
This variable load resistance can cause disturbances, especially if the measuring transducer has to meet the requirements according to the HART specification and transmits the HART signal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Redundant control system
  • Redundant control system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] first reference figure 2 , which shows a known redundant control system. The redundant control system is constructed according to the principle of 1-to-2 (1-von-2), and includes: a first redundant unit with a first control computer 1 and a first external device unit 4, and a second Second redundant unit for control computer 2 and peripheral unit 5 . A sensor 8 (for example a so-called two-wire measuring transducer) acquires a process signal of the technical process to be controlled, which is read in by an external device unit 4, 5 via a line 10 and passed via a suitable serial or parallel bus 6, 7 according to The form of the digital signal is sent to the control computer 1,2. The control computers 1 , 2 process these signals into corresponding control signals for the actuator 9 , wherein only one of the redundant units transmits the control signal to the actuator 9 via the line 11 . These redundant units work in Master-Reserve operation, which means that only one r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Disclosed is a redundant control system comprising a first and a second control computer (1, 2) to which one respective peripheral unit (4, 5) can be connected. Said redundant control system further comprises a two-wire measuring transducer (14) which can be connected to the peripheral units (4, 5) by means of a first and a second connection (15a, 15b, 16a, 16b). Said measuring transducer (14) applies a measured current to the peripheral units (4, 5) in accordance with a variable that is to be detected. Appropriate measures allow a peripheral unit to be replaced in an essentially non-reacting manner regarding the load impedance.

Description

technical field [0001] The invention relates to a redundant control system comprising: a first and a second control computer to which an external equipment unit can be connected respectively; and a two-wire measuring transducer which can be connected to the external equipment unit by means of a first and a second terminal , wherein the two-wire measuring transducer memorizes (einpraegen) the measuring current for the external unit according to the parameters to be acquired. Furthermore, the invention relates to an external equipment unit which is suitable for use in a control system of this type. Background technique [0002] The highly available (hochverfuegbar) automation system SIMATIC S7-400H with redundant structure and the interface connection (Anschaltung) IM153-2 are disclosed in the 2003 edition of the Siemens catalog ST 70 chapters 1 and 5, which can be To connect the external equipment unit ET 200M as a slave device in the redundant PROFIBUS (process field bus)-D...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
CPCG05B19/058G05B2219/14135G05B2219/24173
Inventor 沃尔特·克雷布乌尔里克·莱曼
Owner SIEMENS AG