PLC based process control engineering guide
Control engineering - a guide for beginners
... Operation and control In many processes, a physical variable such as temperature, pressure or voltage has to take up a specified value, and maintain it as accurately as possible A simple example is a ... numerical values, and uses them to calculate the manipulating variable This has certain advantages compared with analog processing: - increased accuracy of control, depending o...
Ngày tải lên: 13/12/2013, 00:14
PLC communications in a process control system
... PLC COMMUNICATIONS IN A PROCESS CONTROL SYSTEM by GR MacKenzie, AEG Communication has become a major part of any process control automation system Today PLC communication is as much for data acquisition ... 56 interfaces A ninth user is an additional lines and 16 interfaces This is clearly very expensive in hardware and installation 1 (a) Point-to-point topology 1(...
Ngày tải lên: 25/12/2013, 08:50
Control Engineering - A guide for beginners - Chapter 6 doc
... available to measure disturbances and maintain them constant An example of this is the temperature control of a gas-fired annealing furnace Here, the main disturbance, gas pressure, can be maintained ... transfer from automatic to manual mode, where the manipulating variable remains at its current value, and can then be changed manually In case of a broken probe, caused, for example,...
Ngày tải lên: 07/08/2014, 15:20
Báo cáo y học: "Comparative study of control selection in a national population -based case-control study: Estimating risk of smoking on cancer deaths in Chinese men"
... deaths TABLE Characteristics of cases and two control groups: Population- based case -control study of smoking on risk of cancer deaths among Chinese men 1989–1991 Characteristic Cases No of subjects ... sex-matched living spouse control design as an alternative control selection for a nationwide population- based case -control study is valid and feasib...
Ngày tải lên: 26/10/2012, 09:48
Identify-Based Networking Systems Configuration Guide
... Industry Standards D-1 D-1 D-2 Identify-Based Networking Systems Configuration Guide Version 1.0 December 2005 vii Contents Identify-Based Networking Systems Configuration Guide viii Version 1.0 December ... company (0403R) Identify-Based Networking Systems Configuration Guide © 2005 Cisco Systems, Inc All rights reserved C O N T E N T S CHAPTER Introduction to...
Ngày tải lên: 22/10/2013, 16:15
Oracle Enterprise Manager 10g Grid Control Implementation Guide P2
... between Grid Control and Application Server Control Oracle TIGHT / Oracle Enterprise Manager 10g Grid Control Implementation Guide / Michael New / 149275-5 26 Oracle Enterprise Manager 10g Grid Control ... Chapter 3, we’ll install Grid Control and get this thing on the road Chapter Grid Control Preinstallation 29 30 Oracle Enterprise Manag...
Ngày tải lên: 06/11/2013, 10:15
Oracle Enterprise Manager 10g Grid Control Implementation Guide P1
... 10gR2 10.2.0.1 OEM 10g Grid Control Release (10.1) EM 10gR1 10.1.0.6 OEM 10g Grid Control Release (10.1) EM 10gR1 10.1.0.5 OEM 10g Grid Control Release (10.1) EM 10gR1 10.1.0.4 OEM 10g Grid Control ... OEM 10g Grid Control Release (10.2.0.4.0) EM 10gR4 10.2.0.4 OEM 10g Grid Control Release (10.2.0.3.0) EM 10gR3 10.2.0.3 OEM 10g Grid Control Release (1...
Ngày tải lên: 06/11/2013, 10:15