| Author | Nguyen Quoc Dinh |
| Call Number | AIT Thesis no. ISE-01-41 |
| Subject(s) | Process control--Computer programs
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of
Engineering, School of Advanced Technologies |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ISE-01-41 |
| Abstract | Nowadays, the most advanced and modern automation technologies with a lot of remarkable
advantages have been applied very popularly to many various fields in industry in order to
improve productivity as well as reduce production expenses. One of these fields is Ceramic
tile manufacturing technology.
In COSEVCO factory in Danang City, Vietnam, there are a few processes equipped with
simple PLC of OMRON. These processes are controlled and monitored locally by local
specific computers, hence, it is impossible to monitor globally all performances of the whole
factory and to cooperate operation among the different components in the factory.
To obtain a high automation level for performance of roller kiln, after studying carefully the
ceramic tile manufacturing procedure, identifying process parameter, variables and number of
inputs/output of Programmable Logic Control (PLC) program, the design and programming
of an automatic control system is essential with the assistance of engineering tool of Process
Control System (PCS7) software of SIEMENS. In Continuos Function Chart (CFC) Editor,
we used some predefined function blocks that are available in CFC's library. Besides, with
programming language Structured Control Language (SCL), we created some user function
blocks that simulate the working principle of main devices in roller kiln. After that, by
interconnecting among these above blocks, a created control system can exactly control
temperature at the various areas in roller kiln according to technical requirements as well as
regulate perfectly speed of roller driving motors as desired by using PID control.
To optimize some operating sequences of roller kiln, some basic blocks such as valves, fans,
combustion chamber and automatic ignition have been selectivity run in Sequential Function
Chati (SFC) Editor.
Furthermore, by using Window Control Center (WinCC V5.0) software of SIEMENS, we
designed some Human Machine Interface (HMI). From the control center window, operator
can monitor all basic components of roller kiln on the screen such as fans, valves and their
present working status or reset/set the temperatme or speed control in roller kiln. In addition,
to get the updated and detailed data with trend and table or alarm messages, there are four
sub-windows built in Graphic Designer that operator can access. They are windows of alarm
logging configuration, operating sequence of fans, speed control of roller driving motors and
temperature control window. Thanks to HMI, operators in the plant can monitor globally the
whole process from the graphics-oriented output any time as well as being able to control the
system directly from any connected remote computer controller without visiting the real
process area.
The model of automatic control system developed in this study not only can become an useful
reference for roller kiln in the real plant but also can be extended to implement a full-scale
automation for the entire Ceramic tile manufacturing line. |
| Year | 2001 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ISE-01-41 |
| Type | Thesis |
| School | School of Advanced Technologies (SAT) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Industrial Systems Engineering (ISE) |
| Chairperson(s) | Afzulpurkar, Nitin V. |
| Examination Committee(s) | Bohez, Ir. Erik L.J;Ullah, A.M.M Sharif; |
| Scholarship Donor(s) | Ministry Of Education and Training (MOET), Vietnam ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2001 |